actors.cc

/*
 *  actors.cc - Game actors.
 *
 *  Copyright (C) 1998-1999  Jeffrey S. Freedman
 *  Copyright (C) 2000-2022  The Exult Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include "actors.h"

#include "Astar.h"
#include "Audio.h"
#include "Face_stats.h"
#include "Gump_manager.h"
#include "Paperdoll_gump.h"
#include "Zombie.h"
#include "actions.h"
#include "ammoinf.h"
#include "animate.h"
#include "armorinf.h"
#include "cheat.h"
#include "chunks.h"
#include "combat.h"
#include "combat_opts.h"
#include "contain.h"
#include "dir.h"
#include "effects.h"
#include "egg.h"
#include "exult.h"
#include "exult_constants.h"
#include "frameseq.h"
#include "frflags.h"
#include "game.h"
#include "gameclk.h"
#include "gamemap.h"
#include "gamewin.h"
#include "ignore_unused_variable_warning.h"
#include "imagewin.h"
#include "items.h"
#include "miscinf.h"
#include "monsters.h"
#include "monstinf.h"
#include "npcdollinf.h"
#include "npctime.h"
#include "objiter.h"
#include "palette.h"
#include "party.h"
#include "ready.h"
#include "spellbook.h"
#include "ucmachine.h"
#include "ucsched.h"
#include "ucscriptop.h"
#include "usefuns.h"
#include "weaponinf.h"

#include <algorithm> /* swap. */
#include <cstdlib>
#include <cstring>
#include <iostream> /* Debugging. */
#include <map>
#include <memory>
#include <set>

#ifdef USE_EXULTSTUDIO
#	include "mouse.h"
#	include "objserial.h"
#	include "servemsg.h"
#	include "server.h"
#endif

using std::cerr;
using std::cout;
using std::endl;
using std::rand;
using std::string;
using std::swap;

Game_object_shared Actor::editing;

extern bool combat_trace;

// Party positions
// Direction, Party num, xy (tile) from leader
//
// Please Don't Touch - Colourless
//
const short Actor::party_pos[4][10][2] = {
		// North Facing
		{ {-2, 2},
		 {2, 2},
		 {0, 4},
		 {-4, 4},
		 {4, 4},
		 {-2, 6},
		 {2, 6},
		 {0, 8},
		 {-4, 8},
		 {4, 8} },
		// East Facing,
		{{-2, -2},
		 {-2, 2},
		 {-4, 0},
		 {-4, -4},
		 {-4, 4},
		 {-6, -2},
		 {-6, 2},
		 {-8, 0},
		 {-8, -4},
		 {-8, 4}},
		// South Facing
		{{-2, -2},
		 {2, -2},
		 {0, -4},
		 {-4, -4},
		 {4, -4},
		 {-2, -6},
		 {2, -6},
		 {0, -8},
		 {-4, -8},
		 {4, -8}},
		// West Facing
		{ {2, -2},
		 {2, 2},
		 {4, 0},
		 {4, -4},
		 {4, 4},
		 {6, -2},
		 {6, 2},
		 {8, 0},
		 {8, -4},
		 {8, 4} }
};

//	Actor frame to substitute when a frame is empty (as some are):
uint8 visible_frames[16]
		= {Actor::standing,    // Standing.
		   Actor::standing,    // Steps.
		   Actor::standing,
		   Actor::standing,        // Ready.
		   Actor::raise2_frame,    // 1-handed strikes => 2-handed.
		   Actor::reach2_frame,  Actor::strike2_frame,
		   Actor::raise1_frame,    // 2-handed => 1-handed.
		   Actor::reach1_frame,  Actor::strike1_frame,
		   Actor::standing,         // When you can't sit...
		   Actor::kneel_frame,      // When you can't bow.
		   Actor::bow_frame,        // When you can't kneel.
		   Actor::standing,         // Can't lie.
		   Actor::strike2_frame,    // Can't raise hands.
		   Actor::ready_frame};     // Can't strech arms outward.

// Set up actor's frame lists.
// Most NPC's walk with a 'stand'
//   frame between steps.
const int FRAME_NUM                      = 5;
uint8     npc_north_framenums[FRAME_NUM] = {0, 1, 0, 2, 0},
	  npc_south_framenums[FRAME_NUM]     = {16, 17, 16, 18, 16},
	  npc_east_framenums[FRAME_NUM]      = {48, 49, 48, 50, 48},
	  npc_west_framenums[FRAME_NUM]      = {32, 33, 32, 34, 32};
static Frames_sequence npc_north_frames(FRAME_NUM, npc_north_framenums);
static Frames_sequence npc_south_frames(FRAME_NUM, npc_south_framenums);
static Frames_sequence npc_east_frames(FRAME_NUM, npc_east_framenums);
static Frames_sequence npc_west_frames(FRAME_NUM, npc_west_framenums);
// Avatar just walks left, right.
uint8 avatar_north_framenums[3] = {0, 1, 2},
	  avatar_south_framenums[3] = {16, 17, 18},
	  avatar_east_framenums[3]  = {48, 49, 50},
	  avatar_west_framenums[3]  = {32, 33, 34};
static Frames_sequence avatar_north_frames(3, avatar_north_framenums);
static Frames_sequence avatar_south_frames(3, avatar_south_framenums);
static Frames_sequence avatar_east_frames(3, avatar_east_framenums);
static Frames_sequence avatar_west_frames(3, avatar_west_framenums);

Frames_sequence* Actor::avatar_frames[4] = {nullptr, nullptr, nullptr, nullptr};
Frames_sequence* Actor::npc_frames[4]    = {nullptr, nullptr, nullptr, nullptr};

const std::array sea_serpent_attack_frames = {1, 2, 3};
const std::array reach_attack_frames1      = {3, 6};
const std::array raise_attack_frames1      = {3, 4, 6};
const std::array fast_swing_attack_frames1 = {3, 5, 6};
const std::array slow_swing_attack_frames1 = {3, 4, 5, 6};
const std::array reach_attack_frames2      = {3, 9};
const std::array raise_attack_frames2      = {3, 7, 9};
const std::array fast_swing_attack_frames2 = {3, 8, 9};
const std::array slow_swing_attack_frames2 = {3, 7, 8, 9};

// inline int Is_attack_frame(int i) { return i >= 3 && i <= 9; }
inline bool Is_attack_frame(int i) {
	return i == 6 || i == 9;
}

inline int Get_dir_from_frame(int i) {
	return ((((i & 16) / 8) - ((i & 32) / 32)) + 4) % 4;
}

/**
 *  Provides attribute/value pairs.
 */
class Actor_attributes {
	/// The attribute names. These are shared among all actors.
	static std::set<string>* strings;
	using Att_map = std::map<const char*, int>;
	/// The attribute name > value map.
	Att_map map;

public:
	/// Basic constructor. Initializes the attribute names.
	Actor_attributes() {
		if (!strings) {
			strings = new std::set<string>;
		}
	}

	/// Sets an attribute's value and, if needed, adds it to
	/// the attribute name list.
	/// @param nm The name of the attribute to be set.
	/// @param val Value to set the attribute to.
	void set(const char* nm, int val) {
		auto siter = strings->find(nm);
		if (siter == strings->end()) {
			siter = strings->insert(nm).first;
		}
		nm      = siter->c_str();
		map[nm] = val;
	}

	/// Gets an attribute's value, if it is in the list.
	/// @param nm The name of the attribute to be gotten.
	/// @return val Current value of the attribute, or
	/// zero if the attribute is not on the list.
	int get(const char* nm) {    // Returns 0 if not set.
		auto siter = strings->find(nm);
		if (siter == strings->end()) {
			return 0;
		}
		nm      = siter->c_str();
		auto it = map.find(nm);
		return it == map.end() ? 0 : it->second;
	}

	/// Gets all attributes for the current actor.
	/// @param attlist (name, value) vector containig all attributes.
	void get_all(std::vector<std::pair<const char*, int>>& attlist) {
		for (auto& it : map) {
			attlist.emplace_back(it);
		}
	}
};

std::set<string>* Actor_attributes::strings = nullptr;

/**
 *  Get/create timers.
 *  @return
 */

Npc_timer_list* Actor::need_timers() {
	if (!timers) {
		timers = std::make_unique<Npc_timer_list>(this);
	}
	return timers.get();
}

/**
 *  Initialize frames, properties and spots.
 */

void Actor::init() {
	if (!avatar_frames[0]) {
		init_default_frames();
	}
	for (auto& prop : properties) {
		prop = 0;
	}
	for (auto& spot : spots) {
		spot = nullptr;
	}
}

/**
 *  Find (best) ammo of given type.
 *  @param family Desired ammo family shape.
 *  @param needed Minimum quantity needed.
 *  @return Pointer to object, if found.
 */

Game_object* Actor::find_best_ammo(int family, int needed) {
	Game_object*       best          = nullptr;
	int                best_strength = -20;
	Game_object_vector vec;    // Get list of all possessions.
	vec.reserve(50);
	get_objects(vec, c_any_shapenum, c_any_qual, c_any_framenum);
	for (auto* obj : vec) {
		if (obj->inside_locked()
			|| !In_ammo_family(obj->get_shapenum(), family)) {
			continue;
		}
		const Ammo_info* ainf = obj->get_info().get_ammo_info();
		if (!ainf) {    // E.g., musket ammunition doesn't have it.
			continue;
		}
		// Can't use it.
		if (obj->get_quantity() < needed) {
			continue;
		}
		// Calc ammo strength.
		int strength = ainf->get_base_strength();
		// Favor those with more shots remaining.
		if (obj->get_quantity() < 5 * needed) {
			strength /= 3;
		} else if (obj->get_quantity() < 10 * needed) {
			strength /= 2;
		}
		if (strength > best_strength) {
			best          = obj;
			best_strength = strength;
		}
	}
	return best;
}

/**
 *  Get effective maximum range for weapon taking in consideration
 *  the actor's strength and combat.
 *  @param winf Pointer to weapon information of the current weapon,
 *  or null for no weapon.
 *  @param reach Weapon reach, or -1 to use weapon's.
 *  @return Weapon's effective range.
 */
int Actor::get_effective_range(const Weapon_info* winf, int reach) const {
	if (reach < 0) {
		if (!winf) {
			const Monster_info* minf = get_info().get_monster_info();
			return minf ? minf->get_reach()
						: Monster_info::get_default()->get_reach();
		}
		reach = winf->get_range();
	}
	const int uses
			= winf ? winf->get_uses() : static_cast<int>(Weapon_info::melee);
	if (!uses || uses == Weapon_info::ranged) {
		return reach;
	} else {
		int       eff_range;
		const int str = get_effective_prop(static_cast<int>(Actor::strength));
		const int combat = get_effective_prop(static_cast<int>(Actor::combat));
		if (str < combat) {
			eff_range = str;
		} else {
			eff_range = combat;
		}
		if (uses == Weapon_info::good_thrown) {
			eff_range *= 2;
		}
		if (eff_range < reach) {
			eff_range = reach;
		}
		if (eff_range > 31) {
			eff_range = 31;
		}
		return eff_range;
	}
}

/**
 *  Find ammo used by weapon.
 *  @param weapon The weapon shape.
 *  @param needed Minimum quantity needed.
 *  @param recursive Whether or not to search inside backpacks and bags.
 *  @return Pointer to object if found.
 */

Game_object* Actor::find_weapon_ammo(int weapon, int needed, bool recursive) {
	if (weapon < 0) {
		return nullptr;
	}
	const Weapon_info* winf = ShapeID::get_info(weapon).get_weapon_info();
	if (!winf) {
		return nullptr;
	}
	const int family = winf->get_ammo_consumed();
	if (family >= 0) {
		Game_object* aobj = get_readied(quiver);
		if (aobj && In_ammo_family(aobj->get_shapenum(), family)
			&& aobj->get_quantity() >= needed) {
			return aobj;    // Already readied.
		} else if (recursive) {
			return find_best_ammo(family, needed);
		}
		return nullptr;
	}

	// Search readied weapons first.
	static const Ready_type_Exult wspots[] = {lhand, rhand, back_2h, belt};
	for (auto wspot : wspots) {
		Game_object* obj = spots[wspot];
		if (!obj || obj->get_shapenum() != weapon) {
			continue;
		}
		const Shape_info& inf = obj->get_info();
		if (family == -2) {
			if (!inf.has_quality() || obj->get_quality() >= needed) {
				return obj;
			}
		}
		// Family -1 and family -3.
		else if (obj->get_quantity() >= needed) {
			return obj;
		}
	}

	// Now recursively search all contents.
	return recursive ? Container_game_object::find_weapon_ammo(weapon)
					 : nullptr;
}

/**
 *  Swap new ammo with old.
 *  @param newammo Pointer to new ammo object.
 */

void Actor::swap_ammo(Game_object* newammo) {
	Game_object* aobj = get_readied(quiver);
	if (aobj == newammo) {
		return;    // Already what we need.
				   // Keep these from getting deleted:
	}
	Game_object_shared aobj_shared;
	Game_object_shared newammo_shared;
	if (aobj) {                             // Something there already?
		aobj->remove_this(&aobj_shared);    // Remove it.
	}
	newammo->remove_this(&newammo_shared);
	add(newammo, true);    // Should go to the right place.
	if (aobj) {            // Put back old ammo.
		add(aobj, true);
	}
}

/**
 *  Recursivelly searches for ammunition for a given weapon, if needed.
 *  @param npc The NPC to be searched.
 *  @param bobj The weapon we want to check.
 *  @param ammo Optional pointer that receives a pointer to the best ammunition
 *  found for the given weapon.
 *  @param recursive Whether or not to search inside backpacks and bags.
 *  @return true if the weapon can be used, ammo is pointer to best ammunition.
 */

static inline bool Is_weapon_usable(
		Actor* npc, Game_object* bobj, Game_object** ammo = nullptr,
		bool recursive = true) {
	if (ammo) {
		*ammo = nullptr;
	}
	const Weapon_info* winf = bobj->get_info().get_weapon_info();
	if (!winf) {
		return false;    // Not a weapon.
	}
	Game_object* aobj      = nullptr;    // Check ranged first.
	int          need_ammo = npc->get_weapon_ammo(
            bobj->get_shapenum(), winf->get_ammo_consumed(),
            winf->get_projectile(), true, &aobj, recursive);
	if (!need_ammo) {
		return true;
	}
	// Try melee if the weapon is not ranged.
	else if (!aobj && winf->get_uses() != Weapon_info::ranged) {
		need_ammo = npc->get_weapon_ammo(
				bobj->get_shapenum(), winf->get_ammo_consumed(),
				winf->get_projectile(), false, &aobj, recursive);
	}
	if (need_ammo && !aobj) {
		return false;
	}
	if (ammo) {
		*ammo = aobj;
	}
	return true;
}

/**
 *  Ready ammo for weapon being carried.
 *  @return Returns true if successful.
 */

bool Actor::ready_ammo() {
	Game_object* weapon = spots[lhand];
	if (!weapon) {
		return false;
	}
	const Shape_info&  info = weapon->get_info();
	const Weapon_info* winf = info.get_weapon_info();
	if (!winf) {
		return false;
	}
	const int ammo = winf->get_ammo_consumed();
	if (ammo < 0) {
		// Ammo not needed.
		return !winf->uses_charges() || !info.has_quality()
			   || weapon->get_quality() > 0;    // Uses charges, but none left.
	}
	Game_object* found = nullptr;
	// Try non-recursive search for ammo first.
	const bool usable = Is_weapon_usable(this, weapon, &found, false);
	if (usable) {    // Ammo is available and ready.
		return true;
	}
	// Try recursive search now.
	found = find_best_ammo(ammo);
	if (!found) {
		return false;
	}
	swap_ammo(found);
	return true;
}

/**
 *  If no shield readied, look through all possessions for the best one.
 *  @return Returns true if successful.
 */

bool Actor::ready_best_shield() {
	if (two_handed) {
		return false;
	}
	if (spots[rhand]) {
		const Shape_info& inf = spots[rhand]->get_info();
		if (is_in_party() || inf.get_armor() || inf.get_armor_immunity()) {
			return inf.get_armor() || inf.get_armor_immunity();
		}
	}
	Game_object*       old_rhand = nullptr;
	Game_object_shared rhand_keep;
	Game_object_shared best_keep;
	if (spots[rhand]) {    // remove old offhand item
		old_rhand = spots[rhand];
		old_rhand->remove_this(&rhand_keep);
	}
	Game_object_vector vec;    // Get list of all possessions.
	vec.reserve(50);
	get_objects(vec, c_any_shapenum, c_any_qual, c_any_framenum);
	Game_object* best          = nullptr;
	int          best_strength = -20;
	for (auto* obj : vec) {
		if (obj->inside_locked()) {
			continue;
		}
		const Shape_info& info = obj->get_info();
		// Only want those that can be readied in hand.
		const int ready = info.get_ready_type();
		if (ready != lhand && ready != backpack) {
			continue;
		}
		const Armor_info* arinf = info.get_armor_info();
		if (!arinf) {
			continue;    // Not a shield.
		}
		if (spots[lhand] == obj) {    // Don't take the weapon.
			continue;
		}
		const int strength = arinf->get_base_strength();
		if (strength > best_strength) {
			best          = obj;
			best_strength = strength;
		}
	}
	if (!best) {
		if (old_rhand) {    // add offhand item back to where it was
			add(old_rhand, true);
		}
		return false;
	}
	// Spot is free already.
	best->remove_this(&best_keep);
	add(best, true);                         // Should go to the right place.
	if (old_rhand && old_rhand != best) {    // don't add twice
		add(old_rhand, true);
	}
	return true;
}

/**
 *  If no weapon readied, look through all possessions for the best one.
 *  @return Returns true if successful.
 */

bool Actor::ready_best_weapon() {
	int points;
	if (Actor::get_weapon(points) != nullptr && ready_ammo()) {
		ready_best_shield();
		return true;    // Already have one.
	}
	// Check for spellbook.
	Game_object* obj = get_readied(lhand);
	if (obj && obj->get_info().get_shape_class() == Shape_info::spellbook) {
		if ((static_cast<Spellbook_object*>(obj))->can_do_spell(this)) {
			ready_best_shield();
			return true;
		}
	}
	Game_object_vector vec;    // Get list of all possessions.
	vec.reserve(50);
	get_objects(vec, c_any_shapenum, c_any_qual, c_any_framenum);
	Game_object*       best      = nullptr;
	Game_object*       best_ammo = nullptr;
	Game_object_shared keep1;
	Game_object_shared keep2;
	Game_object_shared best_keep;
	int                best_strength = -20;
	int                wtype         = backpack;
	for (auto* obj : vec) {
		if (obj->inside_locked()) {
			continue;
		}
		const Shape_info& info  = obj->get_info();
		const int         ready = info.get_ready_type();
		// backpack and rhand added for dragon breath and some spells
		if (ready != lhand && ready != both_hands && ready != rhand
			&& ready != backpack) {
			continue;
		}
		const Weapon_info* winf = info.get_weapon_info();
		if (!winf) {
			continue;    // Not a weapon.
		}
		Game_object* ammo_obj = nullptr;
		if (!Is_weapon_usable(this, obj, &ammo_obj)) {
			continue;
		}
		int strength = winf->get_base_strength();
		strength += get_effective_range(winf);
		if (strength > best_strength) {
			wtype         = ready;
			best          = obj;
			best_ammo     = ammo_obj != obj ? ammo_obj : nullptr;
			best_strength = strength;
		}
	}
	if (!best) {
		ready_best_shield();
		return false;
	}
	// If nothing is in left hand, nothing will happen.
	Game_object* remove1 = spots[lhand];
	Game_object* remove2 = nullptr;
	if (wtype == both_hands && spots[rhand]) {
		remove2 = spots[rhand];
	}
	// Prevent double removal and double add (can corrupt objects list).
	// No need for similar check for remove1 as we wouldn't be here
	// if remove1 were a weapon we could use.
	if (remove2 == best) {
		remove2 = nullptr;
	}
	// Free the spot(s).
	if (remove1) {
		remove1->remove_this(&keep1);
	}
	if (remove2) {
		remove2->remove_this(&keep2);
	}
	best->remove_this(&best_keep);
	if (wtype == rhand) {    // tell it the correct ready spot
		add_readied(best, lhand);
	} else {
		add(best, true);    // Should go to the right place.
	}
	ready_best_shield();    // Also add a shield for 1-handed weapons.
	if (remove1) {          // Put back other things.
		add(remove1, true);
	}
	if (remove2) {
		add(remove2, true);
	}
	if (best_ammo) {
		swap_ammo(best_ammo);
	}
	return true;
}

/**
 *  Try to store given object.
 */

bool Actor::empty_hand(Game_object* obj, Game_object_shared* keep) {
	if (!obj) {
		return true;
	}
	static const int chkspots[] = {belt, backpack};
	add_dirty();
	obj->remove_this(keep);
	for (const int chkspot : chkspots) {
		if (add_readied(obj, chkspot, true, true)) {    // Slot free?
			return true;
		}
	}

	return false;
}

/**
 *  Try to store what is the hands.
 */

void Actor::empty_hands() {
	Game_object*       obj = spots[lhand];
	Game_object_shared keep;
	if (!empty_hand(obj, &keep)) {
		add(obj, true);
	}
	obj = spots[rhand];
	if (!empty_hand(obj, &keep)) {
		add(obj, true);
	}
}

/**
 *  Get effective weapon shape, taking casting frames in consideration.
 *  @return The shape to be displayed in-hand.
 */

int Actor::get_effective_weapon_shape() const {
	if (get_casting_mode() == Actor::show_casting_frames) {
		// Casting frames
		return casting_shape;
	} else {
		Game_object* weapon = spots[lhand];
		return weapon->get_shapenum();
	}
}

/**
 *  Add dirty rectangle(s).
 *  @return Returns false if not on screen.
 */
bool Actor::add_dirty(bool figure_rect    // Recompute weapon rectangle.
) {
	if (!gwin->add_dirty(this)) {
		return false;
	}
	if (figure_rect || get_casting_mode() == Actor::show_casting_frames) {
		int weapon_x;
		int weapon_y;
		int weapon_frame;
		if (figure_weapon_pos(weapon_x, weapon_y, weapon_frame)) {
			const int shnum = get_effective_weapon_shape();

			Shape_frame* wshape = ShapeID(shnum, weapon_frame).get_shape();

			if (wshape) {    // Set dirty area rel. to NPC.
				weapon_rect = gwin->get_shape_rect(wshape, weapon_x, weapon_y);
			} else {
				weapon_rect.w = 0;
			}
		} else {
			weapon_rect.w = 0;
		}
	}
	if (weapon_rect.w > 0) {    // Repaint weapon area too.
		TileRect r = weapon_rect;
		int      xoff;
		int      yoff;
		gwin->get_shape_location(this, xoff, yoff);
		r.shift(xoff, yoff);
		r.enlarge(c_tilesize / 2);
		gwin->add_dirty(gwin->clip_to_win(r));
	}
	return true;
}

/**
 *  Change the frame and set to repaint areas.
 *  @param frnum The new frame.
 */

void Actor::change_frame(int frnum) {
	bool on_map = get_chunk() != nullptr;
	if (on_map) {
		add_dirty();    // Set to repaint old area (if on map).
	}
	ShapeID      id(get_shapenum(), frnum, get_shapefile());
	Shape_frame* shape = id.get_shape();
	if (!shape || shape->is_empty()) {
		// Swap 1hand <=> 2hand frames.
		frnum = (frnum & 48) | visible_frames[frnum & 15];
		id.set_frame(frnum);
		if (!(shape = id.get_shape()) || shape->is_empty()) {
			frnum = (frnum & 48) | Actor::standing;
		}
	}
	rest_time = 0;
	set_frame(frnum);
	if (on_map) {
		add_dirty(true);    // Set to repaint new.
	}
}

/**
 *  See if it's blocked when trying to move to a new tile.
 *  @param t Tile to step to. Tz is possibly updated by this function.
 *  @param f Pointer to tile we are stepping from, or null for current tile.
 *  @param move_flags Additional movement flags to consider for step.
 *  @return Returns true if so, else false.
 */

bool Actor::is_blocked(
		Tile_coord& t,    // Tz possibly updated.
		Tile_coord* f,    // Step from here, or curpos if null.
		const int   move_flags) {
	const Shape_info& info = get_info();
	// Get dim. in tiles.
	const int frame  = get_framenum();
	const int xtiles = info.get_3d_xtiles(frame);
	const int ytiles = info.get_3d_ytiles(frame);
	const int ztiles = info.get_3d_height();
	t.fixme();
	if (xtiles == 1 && ytiles == 1) {    // Simple case?
		Map_chunk* nlist = gmap->get_chunk(
				t.tx / c_tiles_per_chunk, t.ty / c_tiles_per_chunk);
		nlist->setup_cache();
		int        new_lift;
		const bool blocked = nlist->is_blocked(
				ztiles, t.tz, t.tx % c_tiles_per_chunk,
				t.ty % c_tiles_per_chunk, new_lift,
				move_flags | get_type_flags());
		t.tz = new_lift;
		return blocked;
	}
	return Map_chunk::is_blocked(
			xtiles, ytiles, ztiles, f ? *f : get_tile(), t,
			move_flags | get_type_flags());
}

/**
 *  Finds an object which blocks the destination tile.
 *  @param tile The (blocked) tile to check.
 *  @param dir Direction we are stepping from.
 */

Game_object* Actor::find_blocking(const Tile_coord& tile, int dir) {
	ignore_unused_variable_warning(tile);
	TileRect       footprint = get_footprint();
	const TileRect base      = get_footprint();
	switch (dir) {
	case north:
		footprint.shift(0, -1);
		break;
	case northeast:
		footprint.shift(1, -1);
		break;
	case east:
		footprint.shift(1, 0);
		break;
	case southeast:
		footprint.shift(1, 1);
		break;
	case south:
		footprint.shift(0, 1);
		break;
	case southwest:
		footprint.shift(-1, 1);
		break;
	case west:
		footprint.shift(-1, 0);
		break;
	case northwest:
		footprint.shift(-1, -1);
		break;
	}
	Game_object* block;
	for (int i = footprint.x; i < footprint.x + footprint.w; i++) {
		for (int j = footprint.y; j < footprint.y + footprint.h; j++) {
			if (base.has_world_point(i, j)) {
				continue;
			} else if (
					(block = Game_object::find_blocking(
							 Tile_coord(i, j, get_tile().tz)))
					!= nullptr) {
				return block;
			}
		}
	}
	return nullptr;
}

/**
 *  Move an object, and possibly change its shape too.
 *  @param old_chunk The actor's old chunk.
 *  @param new_chunk The chunk to which the actor is moving.
 *  @param new_sx New x coordinate.
 *  @param new_sy New y coordinate.
 *  @param new_frame The new frame.
 *  @param new_lift The new z coordinate.
 */
inline void Actor::movef(
		Map_chunk* old_chunk, Map_chunk* new_chunk, int new_sx, int new_sy,
		int new_frame, int new_lift) {
	const Game_object_shared keep = shared_from_this();
	if (old_chunk) {    // Remove from current chunk.
		old_chunk->remove(this);
	}
	set_shape_pos(new_sx, new_sy);
	if (new_frame >= 0) {
		change_frame(new_frame);
	}
	if (new_lift >= 0) {
		set_lift(new_lift);
	}
	new_chunk->add(this);
}

/**
 *  Create character.
 *  @param nm The actor's name.
 *  @param shapenum The initial shape.
 *  @param num The NPC's number from npc.dat.
 *  @param uc The usecofe function to use.
 */

Actor::Actor(const std::string& nm, int shapenum, int num, int uc)
		: name(nm), usecode(uc), usecode_assigned(false), unused(false),
		  npc_num(num), face_num(num), party_id(-1), temperature(0),
		  shape_save(-1), oppressor(-1), casting_mode(not_casting),
		  casting_shape(-1), target_tile(Tile_coord(-1, -1, 0)),
		  attack_weapon(-1), attack_mode(nearest),
		  schedule_type(Schedule::loiter), next_schedule(255),
		  restored_schedule(-1), dormant(true), hit(false),
		  combat_protected(false), user_set_attack(false), alignment(0),
		  charmalign(0), two_handed(false), two_fingered(false),
		  use_scabbard(false), use_neck(false), light_sources(0),
		  usecode_dir(0), type_flags(0), gear_immunities(0), gear_powers(0),
		  ident(0), skin_color(-1), action(nullptr), frame_time(0),
		  step_index(0), qsteps(0), weapon_rect(0, 0, 0, 0), rest_time(0) {
	set_shape(shapenum, 0);
	init();
	frames = &npc_frames[0];    // Default:  5-frame walking.
}

/**
 *  Deletes actor.
 */

Actor::~Actor() {
	purge_deleted_actions();
	if (in_queue() && gwin->get_tqueue()) {
		gwin->get_tqueue()->remove(this);
	}
	delete action;
}

/**
 *  Goes through the actor's readied gear and caches powers
 *  and immunities.
 */

void Actor::refigure_gear() {
	static const Ready_type_Exult locs[]
			= {head,  belt,  lhand,  lfinger,  legs,  feet,  rfinger,
			   rhand, torso, amulet, earrings, cloak, gloves};
	int powers    = 0;
	int immune    = 0;
	light_sources = 0;
	for (auto loc : locs) {
		Game_object* worn = spots[loc];
		if (worn) {
			const Shape_info& info = worn->get_info();
			const char        rdy  = info.get_ready_type();
			if (info.is_light_source()
				&& (loc != belt
					|| (rdy != lhand && rdy != rhand && rdy != both_hands))) {
				add_light_source(info.get_object_light(worn->get_framenum()));
			}
			powers |= info.get_object_flags(
					worn->get_framenum(),
					info.has_quality() ? worn->get_quality() : -1);
			immune |= info.get_armor_immunity();
		}
	}
	gear_immunities = immune;
	gear_powers     = powers;
}

void Actor::say_hunger_message() {
	const int food = get_property(static_cast<int>(food_level));
	if (food <= 0) {    // Really low?
		if (rand() % 4) {
			say(first_starving, last_starving);
		}
	} else if (food <= 4) {
		if (rand() % 3) {
			say(first_needfood, last_needfood);
		}
	} else {    // if (food <= 9)
		if (rand() % 2) {
			say(first_hunger, last_hunger);
		}
	}
}

/**
 *  Decrement food level and print complaints if it gets too low.
 *  NOTE:  Should be called every hour.
 */

void Actor::use_food() {
	if (get_info().does_not_eat() || (gear_powers & Frame_flags::doesnt_eat)) {
		return;
	}
	int food = get_property(static_cast<int>(food_level));
	food -= (rand() % 4);    // Average 1.5 level/hour.
	set_property(static_cast<int>(food_level), food);
	if (food > 9) {
		return;
	}
	say_hunger_message();
	need_timers()->start_hunger();    // minute checks for damage and messages.
}

/**
 *  Periodic check for freezing.
 *  @param freeze True if the actor is freezing. This is usually the
 *  Avatar's freeze flag.
 */

void Actor::check_temperature(bool freeze) {
	if (!freeze) {             // Not in a cold area?
		if (!temperature) {    // 0 means warm.
			return;            // Nothing to do.
		}
		// Warming up.
		temperature -= (temperature >= 5 ? 5 : temperature);
		if (rand() % 3 == 0) {
			if (temperature >= 30) {
				say(first_warming_up, last_warming_up);
			} else {
				say(first_warming_up_2, last_warming_up_2);
			}
		}
		return;
	}
	// Immune to cold by nature or an item?
	if (get_info().is_cold_immune()
		|| (gear_powers & Frame_flags::cold_immune)) {
		return;
	}
	if (get_schedule_type() == Schedule::wait) {
		return;    // Not following leader?  Leave alone.
	}
	const int warmth = figure_warmth();    // (This could be saved for speed.)
	if (warmth >= 100) {                   // Enough clothing?
		if (!temperature) {
			return;    // Already warm.
		}
		int decr = 1 + (warmth - 100) / 10;
		decr     = decr > temperature ? temperature : decr;
		temperature -= decr;
		if (rand() % 3 == 0) {
			if (temperature >= 30) {
				say(first_warming_in_cold, last_warming_in_cold);
			} else {
				say(first_warming_in_cold_2, last_warming_in_cold_2);
			}
		}
		return;
	}
	const int incr = 1 + (100 - warmth) / 20;
	temperature += incr;
	if (temperature > 63) {
		temperature = 63;
	}
	if (rand() % 3 == 0) {
		switch (temperature / 10) {
		case 0:
			say(first_chilly, last_chilly);    // A bit chilly.
			break;
		case 1:
			say(first_cold, last_cold);    // It's colder.
			break;
		case 2:
			say(first_colder, last_colder);
			break;
		case 3:
			say(first_frostbite, last_frostbite);    // Frostbite.
			break;
		case 4:
			say(first_frostbite_2, last_frostbite_2);
			break;
		case 5:
			say(first_frostbite_3, last_frostbite_3);
			reduce_health(1, Weapon_data::freezing_damage);
			break;
		case 6:
			say(first_frozen, last_frozen);    // Frozen.
			reduce_health(1 + rand() % 3, Weapon_data::freezing_damage);
			break;
		}
	}
}

/*
 *  Get sequence of frames for an attack.
 *
 *  Output: # of frames stored.
 */

int Actor::get_attack_frames(
		int          weapon,        // Weapon shape, or -1 for innate.
		bool         projectile,    // Shooting/throwing.
		int          dir,           // 0-7 (as in dir.h).
		signed char* frames         // Frames stored here.
) const {
	tcb::span<const int> which;
	if (is_slime()) {
		return 0;
	} else if (get_info().has_strange_movement()) {
		which = sea_serpent_attack_frames;
	} else {
		unsigned char      frame_flags;    // Get Actor_frame flags.
		const Weapon_info* winfo;
		if (weapon >= 0
			&& (winfo = ShapeID::get_info(weapon).get_weapon_info())
					   != nullptr) {
			frame_flags = winfo->get_actor_frames(projectile);
		} else {    // Default to normal swing.
			frame_flags
					= projectile ? Weapon_info::reach : Weapon_info::fast_swing;
		}
		if (two_handed) {
			switch (frame_flags) {
			case Weapon_info::reach:
				which = reach_attack_frames2;
				break;
			case Weapon_info::raise:
				which = raise_attack_frames2;
				break;
			case Weapon_info::fast_swing:
				which = fast_swing_attack_frames2;
				break;
			case Weapon_info::slow_swing:
			default:
				which = slow_swing_attack_frames2;
				break;
			}
		} else {
			switch (frame_flags) {
			case Weapon_info::reach:
				which = reach_attack_frames1;
				break;
			case Weapon_info::raise:
				which = raise_attack_frames1;
				break;
			case Weapon_info::fast_swing:
				which = fast_swing_attack_frames1;
				break;
			case Weapon_info::slow_swing:
			default:
				which = slow_swing_attack_frames1;
				break;
			}
		}
	}
	for (auto fr : which) {    // Copy frames with correct dir.
		int frame = get_dir_framenum(dir, fr);
		// Check for empty shape.
		ShapeID      id(get_shapenum(), frame, get_shapefile());
		Shape_frame* shape = id.get_shape();
		if (!shape || shape->is_empty()) {
			// Swap 1hand <=> 2hand frames.
			frame = get_dir_framenum(dir, visible_frames[frame & 15]);
			id.set_frame(frame);
			if (!(shape = id.get_shape()) || shape->is_empty()) {
				frame = get_dir_framenum(dir, Actor::standing);
			}
		}
		*frames++ = frame;
	}
	return which.size();
}

void Actor::add_light_source(Game_object* obj) {
	const Shape_info& info = obj->get_info();
	add_light_source(info.get_object_light(obj->get_framenum()));
}

void Actor::remove_light_source(Game_object* obj) {
	const Shape_info& info = obj->get_info();
	remove_light_source(info.get_object_light(obj->get_framenum()));
}

/*
 *  Set default set of frames.
 */

void Actor::init_default_frames() {
	// Set up actor's frame lists.
	npc_frames[static_cast<int>(north) / 2]    = &npc_north_frames;
	npc_frames[static_cast<int>(south) / 2]    = &npc_south_frames;
	npc_frames[static_cast<int>(east) / 2]     = &npc_east_frames;
	npc_frames[static_cast<int>(west) / 2]     = &npc_west_frames;
	avatar_frames[static_cast<int>(north) / 2] = &avatar_north_frames;
	avatar_frames[static_cast<int>(south) / 2] = &avatar_south_frames;
	avatar_frames[static_cast<int>(east) / 2]  = &avatar_east_frames;
	avatar_frames[static_cast<int>(west) / 2]  = &avatar_west_frames;
}

/*
 *  This is called for the Avatar to return to a normal standing position
 *  when not doing anything else.
 */

void Actor::stand_at_rest() {
	rest_time       = 0;                       // Reset timer.
	const int frame = get_framenum() & 0xf;    // Base frame #.
	if (frame == standing || frame == sit_frame || frame == sleep_frame) {
		return;    // Already standing/sitting/sleeping.
	}
	if (!is_dead() && schedule_type == Schedule::follow_avatar
		&& !get_flag(Obj_flags::asleep)) {
		change_frame(get_dir_framenum(standing));
	}
}

/*
 *  Set new action.
 */

void Actor::set_action(Actor_action* newact) {
	if (newact != action) {
		Actor_action* todel;
		if (action && (todel = action->kill()) != nullptr) {
			deletedactions.push_back(todel);
		}
		action = newact;
	}
	if (!action) {    // No action?  We're stopped.
		frame_time = 0;
	}
}

/*
 *  Empty deleted action list.
 */

void Actor::purge_deleted_actions() {
	while (!deletedactions.empty()) {
		Actor_action* act = deletedactions.back();
		deletedactions.pop_back();
		delete act;
	}
}

/*
 *  Get destination, or current spot if no destination.
 */

Tile_coord Actor::get_dest() const {
	Tile_coord dest;
	if (action && action->get_dest(dest)) {
		return dest;
	} else {
		return get_tile();
	}
}

/*
 *  Walk towards a given tile.
 */

void Actor::walk_to_tile(
		const Tile_coord& dest,     // Destination.
		int               speed,    // Time between frames (msecs).
		int               delay,    // Delay before starting (msecs) (only
		//   if not already moving).
		int maxblk    // Max. # retries if blocked.
) {
	if (!action) {
		action = new Path_walking_actor_action(new Zombie(), maxblk);
	}
	set_action(action->walk_to_tile(this, get_tile(), dest));
	if (action) {    // Successful at setting path?
		start(speed, delay);
	} else {
		frame_time = 0;    // Not moving.
	}
}

/*
 *  Find a path towards a given tile.
 *
 *  Output: 0 if failed.
 */

int Actor::walk_path_to_tile(
		const Tile_coord& src,      // Our location, or an off-screen
									//   location to try path from.
		const Tile_coord& dest,     // Destination.
		int               speed,    // Time between frames (msecs).
		int               delay,    // Delay before starting (msecs) (only
		//   if not already moving).
		int dist,     // Distance to get within dest.
		int maxblk    // Max. # retries if blocked.
) {
	set_action(new Path_walking_actor_action(new Astar(), maxblk));
	set_action(action->walk_to_tile(this, src, dest, dist));
	if (action) {    // Successful at setting path?
		start(speed, delay);
		return 1;
	}
	frame_time = 0;    // Not moving.
	return 0;
}

/*
 *  Begin animation.
 */

void Actor::start(
		int speed,    // Time between frames (msecs).
		int delay     // Delay before starting (msecs) (only
					  //   if not already moving).
) {
	dormant    = false;    // 14-jan-2001 - JSF.
	frame_time = speed;
	if (!in_queue() || delay) {    // Not already in queue?
		if (delay) {
			gwin->get_tqueue()->remove(this);
		}
		const uint32 curtime = Game::get_ticks();
		gwin->get_tqueue()->add(curtime + delay, this, gwin);
	}
}

/*
 *  Start with standard delay.
 */
void Actor::start_std() {
	start(gwin->get_std_delay(), gwin->get_std_delay());
}

/*
 *  Stop animation.
 */
void Actor::stop() {
	/* +++ This might cause jerky walking. Needs to be done above? */
	if (action) {
		action->stop(this);
		add_dirty();
	}
	frame_time = 0;
}

/*
 *  Want one value to approach another.
 */

inline int Approach(
		int from, int to,
		int dist    // Desired distance.
) {
	if (from <= to) {    // Going forwards?
		return to - from <= dist ? from : to - dist;
	} else {    // Going backwards.
		return from - to <= dist ? from : to + dist;
	}
}

/*
 *  Follow the leader.
 */

void Actor::follow(const Actor* leader) {
	if (Actor::is_dead() || !can_act()) {
		return;    // Not when dead, paralyzed, or asleep.
	}
	int              delay = 0;
	int              dist;    // How close to aim for.
	const Tile_coord leaderpos = leader->get_tile();
	const Tile_coord pos       = get_tile();
	Tile_coord       goal;
	if (leader->is_moving()) {    // Figure where to aim.
		// Aim for leader's dest.
		dist    = 2 + party_id / 3;
		goal    = leader->get_dest();
		goal.tx = Approach(pos.tx, goal.tx, dist);
		goal.ty = Approach(pos.ty, goal.ty, dist);
	} else {                 // Leader stopped?
		goal = leaderpos;    // Aim for leader.
		if (gwin->walk_in_formation && distance(leader) <= 6) {
			return;    // In formation, & close enough.
		}
		//		cout << "Follow:  Leader is stopped" << endl;
		// +++++For formation, why not get correct positions?
		static const int xoffs[10] = {-1, 1, -2, 2, -3, 3, -4, 4, -5, 5};
		static const int yoffs[10] = {1, -1, 2, -2, 3, -3, 4, -4, 5, -5};
		goal.tx += xoffs[party_id] + 1 - rand() % 3;
		goal.ty += yoffs[party_id] + 1 - rand() % 3;
		dist = 1;
	}
	// Already aiming along a path?
	if (is_moving() && action && action->following_smart_path() &&
		// And leader moving, or dest ~= goal?
		(leader->is_moving() || goal.distance(get_dest()) <= 5)) {
		return;
	}
	// Tiles to goal.
	const int goaldist = goal.distance(pos);
	if (goaldist < dist) {    // Already close enough?
		if (!leader->is_moving()) {
			stop();
		}
		return;
	}
	// Is leader following a path?
	const bool leaderpath
			= leader->action && leader->action->following_smart_path();
	// Get leader's distance from goal.
	const int leaderdist = leader->distance(goal);
	// Get his speed.
	int speed = leader->get_frame_time();
	if (!speed) {    // Not moving?
		speed = 100;
		if (goaldist < leaderdist) {    // Closer than leader?
			// Delay a bit IF not moving.
			delay = (1 + leaderdist - goaldist) * 100;
		}
	}
	if (goaldist - leaderdist >= 5) {
		speed -= 20;    // Speed up if too far.
	}
	// Get window rect. in tiles.
	const TileRect wrect     = gwin->get_win_tile_rect();
	const int      dist2lead = leader->distance(pos);
	// Getting kind of far away?
	if (dist2lead > wrect.w + wrect.w / 2 && party_id >= 0
		&&                // And a member of the party.
		!leaderpath) {    // But leader is not following path.
		// Approach, or teleport.
		// Try to approach from offscreen.
		if (approach_another(leader)) {
			return;
		}
		// Find a free spot.
		goal = Map_chunk::find_spot(leader->get_tile(), 2, this);
		if (goal.tx != -1) {
			move(goal.tx, goal.ty, goal.tz);
			if (rand() % 2) {
				say(first_catchup, last_catchup);
			}
			gwin->paint();
			return;
		}
	}
	// NOTE:  Avoid delay when moving,
	//  as it creates jerkiness.  AND,
	//  0 retries if blocked.
	walk_to_tile(goal, speed, delay, 0);
}

/*
 *  Approach another actor from offscreen.
 *
 *  Output: 0 if failed.
 */

int Actor::approach_another(
		const Actor* other,
		bool         wait    // If true, game hangs until arrival.
) {
	Tile_coord dest = other->get_tile();
	// Look outwards for free spot.
	dest = Map_chunk::find_spot(dest, 8, get_shapenum(), get_framenum());
	if (dest.tx == -1) {
		return 0;
	}
	// Where are we now?
	Tile_coord src = get_tile();
	if (!gwin->get_win_tile_rect().has_world_point(
				src.tx - src.tz / 2, src.ty - src.tz / 2)) {
		// Off-screen?
		src = Tile_coord(-1, -1, 0);
	}
	const int destmap = other->get_map_num();
	const int srcmap  = get_map_num();
	if (destmap != -1 && srcmap != -1 && srcmap != destmap) {
		src = Tile_coord(-1, -1, 0);
		move(src, destmap);
	}
	Actor_action* action = new Path_walking_actor_action();
	if (!action->walk_to_tile(this, src, dest)) {
		delete action;
		return 0;
	}
	set_action(action);
	const int speed = gwin->get_std_delay() / 2;
	start(speed);    // Walk fairly fast.
	if (wait) {      // Only wait ~1/5 sec.
		Wait_for_arrival(this, dest, 2 * gwin->get_std_delay());
	}
	return 1;
}

/*
 *  Get information about a tile that an actor is about to step onto.
 */

void Actor::get_tile_info(
		Actor*       actor,    // May be 0 if not known.
		Game_window* gwin,
		Map_chunk*   nlist,    // Chunk.
		int tx, int ty,        // Tile within chunk.
		bool& water,           // Returns 1 if water.
		bool& poison           // Returns 1 if poison.
) {
	ignore_unused_variable_warning(gwin);
	ShapeID flat = nlist->get_flat(tx, ty);
	if (flat.get_shapenum() == -1) {
		water = poison = false;
	} else {
		const Shape_info& finfo = flat.get_info();
		water                   = finfo.is_water();
		poison                  = finfo.is_poisonous();
		// Check for swamp/swamp boots.
		if (poison && actor) {
			if ((actor->gear_powers
				 & (Frame_flags::swamp_safe | Frame_flags::poison_safe))
				!= 0) {
				poison = false;
			} else {    // Not protected by gear?
						// Safe from poisoning?
				const Monster_info* minf = actor->get_info().get_monster_info();
				if (minf && minf->poison_safe()) {
					poison = false;
				}
			}
		}
	}
}

/*
 *  Set combat opponent.
 */

void Actor::set_target(
		Game_object* obj,
		bool         start_combat    // If true, set sched. to combat.
) {
	target              = weak_from_obj(obj);
	const bool im_party = is_in_party() || this == gwin->get_main_actor();
	if (start_combat && !im_party
		&& (schedule_type != Schedule::combat || !schedule)) {
		set_schedule_type(Schedule::combat);
	}
	Actor* opponent = obj ? obj->as_actor() : nullptr;
	if (opponent) {
		opponent->set_oppressor(get_npc_num());
	}
	// Pure guess.
	Actor* oppr = oppressor >= 0 ? gwin->get_npc(oppressor) : nullptr;
	if (oppr
		&& (oppr->get_target() != this
			|| oppr->get_schedule_type() != Schedule::combat)) {
		oppressor = -1;
	}
}

/*
 *  Works out if an item can be readied in a spot
 *
 *  Output: true if it does fit, or false if it can't
 */

bool Actor::fits_in_spot(Game_object* obj, int spot) {
	const Shape_info& inf          = obj->get_info();
	const int         rtype        = inf.get_ready_type();
	const int         alt1         = inf.get_alt_ready1();
	const int         alt2         = inf.get_alt_ready2();
	const bool        can_scabbard = (alt1 == scabbard || alt2 == scabbard);
	const bool can_neck = (rtype == neck || alt1 == neck || alt2 == neck);
	if (spot == both_hands) {
		spot = lhand;
	} else if (spot == lrgloves) {
		spot = lfinger;
	} else if (spot == neck) {
		spot = amulet;
	} else if (spot == scabbard) {
		spot = belt;
	}

	// If occupied, can't place
	if (spots[spot]) {
		return false;
	}
	// If want to use 2h or a 2h is already equiped, can't go in right
	else if ((rtype == both_hands || two_handed) && spot == rhand) {
		return false;
	}
	// If want to use 2f or a 2f is already equiped, can't go in right or gloves
	else if (
			(rtype == lrgloves || two_fingered)
			&& (spot == rfinger || spot == gloves)) {
		return false;
	}
	// If want to use scabbard or a scabbard is already equiped, can't go in
	// others
	else if (
			(can_scabbard || use_scabbard)
			&& (spot == back_2h || spot == back_shield)) {
		return false;
	}
	// If want to use neck or neck is already filled, can't go in cloak
	else if ((can_neck || use_neck) && spot == cloak) {
		return false;
	}
	// Can't use 2h in left if right occupied
	else if (rtype == both_hands && spot == lhand && spots[rhand]) {
		return false;
	}
	// Can't use 2f in left if right occupied
	else if (rtype == lrgloves && spot == lfinger && spots[rfinger]) {
		return false;
	}
	// Can't use scabbard in belt if back 2h or back shield occupied
	else if (
			can_scabbard && spot == belt
			&& (spots[back_2h] || spots[back_shield])) {
		return false;
	}
	// Can't use neck in amulet if cloak occupied
	else if (can_neck && spot == amulet && spots[cloak]) {
		return false;
	}
	// If in left or right hand allow it
	else if (spot == lhand || spot == rhand) {
		return true;
	}
	// Special Checks for Belt
	else if (spot == belt) {
		if (inf.is_spell() || can_scabbard) {
			return true;
		}
	}
	// Special Checks for back 2h and back shield
	else if (spot == back_2h || spot == back_shield) {
		if (can_scabbard) {
			return true;
		}
	}
	// Special Checks for amulet and cloak
	else if (spot == amulet || spot == cloak) {
		if (can_neck) {
			return true;
		}
	}

	// Lastly if we have gotten here, check the paperdoll table
	return inf.is_object_allowed(obj->get_framenum(), spot);
}

/*
 *  Find the spot(s) where an item would prefer to be readied
 *
 *  Output: prefered slot, alternative slots
 */

void Actor::get_prefered_slots(
		Game_object* obj, int& prefered, int& alt1, int& alt2) const {
	const Shape_info& info = obj->get_info();

	// Defaults
	prefered = info.get_ready_type();
	alt1     = info.get_alt_ready1();
	alt2     = info.get_alt_ready2();
	if (alt1 == invalid_spot) {
		alt1 = lhand;
	}
	if (alt2 == invalid_spot) {
		alt2 = lhand;
	}

	if (prefered == lhand) {
		if (info.is_object_allowed(obj->get_framenum(), rhand)) {
			if (!info.is_object_allowed(obj->get_framenum(), lhand)) {
				prefered = rhand;
			} else {
				alt1 = rhand;
			}
		} else {
			alt1 = rhand;
		}
	}
}

/*
 *  Find the best spot where an item may be readied.
 *
 *  Output: Index, or -1 if none found.
 */

int Actor::find_best_spot(Game_object* obj) {
	int prefered;
	int alternate1;
	int alternate2;

	// Get the preferences
	get_prefered_slots(obj, prefered, alternate1, alternate2);

	// Check Prefered
	if (fits_in_spot(obj, prefered)) {
		return prefered;
	}
	// Alternate
	else if (alternate1 >= 0 && fits_in_spot(obj, alternate1)) {
		return alternate1;
	}
	// Second alternate
	else if (alternate2 >= 0 && fits_in_spot(obj, alternate2)) {
		return alternate2;
	}
	// Belt
	else if (fits_in_spot(obj, belt)) {
		return belt;
	}
	// Back - required???
	else if (fits_in_spot(obj, backpack)) {
		return backpack;
	}
	// Back2h
	else if (fits_in_spot(obj, back_2h)) {
		return back_2h;
	}
	// Sheild Spot
	else if (fits_in_spot(obj, back_shield)) {
		return back_shield;
	}
	// Left Hand
	else if (fits_in_spot(obj, lhand)) {
		return lhand;
	}
	// Right Hand
	else if (fits_in_spot(obj, rhand)) {
		return rhand;
	}

	return -1;
}

/*
 *  Get previous schedule type.
 *
 *  Output: Prev. schedule #, or -1 if not known.
 */

int Actor::get_prev_schedule_type() const {
	return schedule ? schedule->get_prev_type() : -1;
}

/*
 *  Restore actor's schedule after reading.  This CANNOT be called from
 *  a constructor, since it may call virtual methods when setting up
 *  the schedule.
 */

void Actor::restore_schedule() {
	// Make sure it's in valid chunk.
	Map_chunk* olist = get_chunk();
	// Activate schedule if not in party.
	if (olist && !is_in_party()) {
		if (next_schedule != 255
			&& schedule_type == Schedule::walk_to_schedule) {
			set_schedule_and_loc(next_schedule, schedule_loc);
		} else {
			old_schedule_loc  = schedule_loc;
			restored_schedule = schedule_type;
			set_schedule_type(schedule_type);
		}
	}
}

/*
 *  Set new schedule by type.
 */

void Actor::set_schedule_type(
		int new_schedule_type,
		std::unique_ptr<Schedule>
				newsched    // New sched., or nullptr to create here.
) {
	// Don't stop path_run_usecode unless it is done.
	If_else_path_actor_action* act
			= action ? action->as_usecode_path() : nullptr;
	if (!act || act->is_done()) {
		stop();                 // Stop moving
		set_action(nullptr);    // Clear out old action.
	}
	if (schedule) {    // Finish up old if necessary.
		schedule->ending(new_schedule_type);
	}
	// Save old for a moment.
	auto old_schedule = static_cast<Schedule::Schedule_types>(schedule_type);
	if (newsched) {
		schedule = std::move(newsched);
	} else {
		schedule.reset();
		switch (static_cast<Schedule::Schedule_types>(new_schedule_type)) {
		case Schedule::combat:
			schedule = std::make_unique<Combat_schedule>(this, old_schedule);
			break;
		case Schedule::horiz_pace:
			ready_best_weapon();
			schedule = Pace_schedule::create_horiz(this);
			break;
		case Schedule::vert_pace:
			ready_best_weapon();
			schedule = Pace_schedule::create_vert(this);
			break;
		case Schedule::talk:
			schedule = std::make_unique<Talk_schedule>(this);
			break;
		case Schedule::dance:
			empty_hands();
			schedule = std::make_unique<Dance_schedule>(this);
			break;
		case Schedule::farm:    // Use a scythe.
			schedule = std::make_unique<Farmer_schedule>(this);
			break;
		case Schedule::tend_shop:    // For now.
			empty_hands();
			schedule = std::make_unique<Loiter_schedule>(this, 3);
			break;
		case Schedule::miner:    // Use a pick.
			schedule = std::make_unique<Miner_schedule>(this);
			break;
		case Schedule::hound:
			ready_best_weapon();
			schedule = std::make_unique<Hound_schedule>(this);
			break;
		case Schedule::loiter:
			schedule = std::make_unique<Loiter_schedule>(this);
			break;
		case Schedule::graze:    // For now.
			schedule = std::make_unique<Graze_schedule>(this);
			break;
		case Schedule::wander:
			schedule = std::make_unique<Wander_schedule>(this);
			break;
		case Schedule::blacksmith:
			schedule = std::make_unique<Forge_schedule>(this);
			break;
		case Schedule::sleep:
			if (party_id < 0 && npc_num != 0) {
				empty_hands();
			}
			schedule = std::make_unique<Sleep_schedule>(this);
			break;
		case Schedule::wait:
			schedule = std::make_unique<Wait_schedule>(this);
			break;
		case Schedule::eat:
			empty_hands();
			schedule = std::make_unique<Eat_schedule>(this);
			break;
		case Schedule::sit:
			empty_hands();
			schedule = std::make_unique<Sit_schedule>(this);
			break;
		case Schedule::bake:
			schedule = std::make_unique<Bake_schedule>(this);
			break;
		case Schedule::sew:
			schedule = std::make_unique<Sew_schedule>(this);
			break;
		case Schedule::shy:
			empty_hands();
			schedule = std::make_unique<Shy_schedule>(this);
			break;
		case Schedule::lab:
			schedule = std::make_unique<Lab_schedule>(this);
			break;
		case Schedule::thief:
			empty_hands();
			schedule = std::make_unique<Thief_schedule>(this);
			break;
		case Schedule::waiter:
			empty_hands();
			schedule = std::make_unique<Waiter_schedule>(this);
			break;
		case Schedule::kid_games:
			empty_hands();
			schedule = std::make_unique<Kid_games_schedule>(this);
			break;
		case Schedule::eat_at_inn:
			empty_hands();
			schedule = std::make_unique<Eat_at_inn_schedule>(this);
			break;
		case Schedule::duel:
			schedule = std::make_unique<Duel_schedule>(this);
			break;
		case Schedule::preach:
			ready_best_weapon();    // Fellowship staff.
			schedule = std::make_unique<Preach_schedule>(this);
			break;
		case Schedule::patrol:
			ready_best_weapon();
			schedule = std::make_unique<Patrol_schedule>(this);
			break;
		case Schedule::desk_work:
			empty_hands();
			schedule = std::make_unique<Desk_schedule>(this);
			break;
		case Schedule::follow_avatar:
			schedule = std::make_unique<Follow_avatar_schedule>(this);
			break;
		case Schedule::walk_to_schedule:
			cerr << "Attempted to set a \"walk to schedule\" activity for NPC "
				 << get_npc_num() << endl;
			break;
		case Schedule::arrest_avatar:
			schedule = std::make_unique<Arrest_avatar_schedule>(this);
			break;
		default:
			if (new_schedule_type >= Schedule::first_scripted_schedule) {
				schedule = std::make_unique<Scripted_schedule>(
						this, new_schedule_type);
			}
			break;
		}
	}
	// Set AFTER creating new schedule.
	schedule_type = new_schedule_type;

	// Reset Next Schedule
	schedule_loc  = Tile_coord(0, 0, 0);
	next_schedule = 255;

	if (!gmap->is_chunk_read(get_cx(), get_cy())) {
		dormant = true;    // Chunk hasn't been read in yet.
		if (schedule) {
			schedule->im_dormant();
		}
	} else if (schedule) {    // Try to start it.
		dormant = false;
		schedule->now_what();
	}
}

/*
 *  Cache out an actor.
 *  Resets the schedule, and makes the actor dormant
 */
void Actor::cache_out() {
	// This is a bit of a hack, but it works well enough
	if (get_schedule_type() != Schedule::walk_to_schedule) {
		set_schedule_type(get_schedule_type());
	}
}

bool Actor::teleport_offscreen_to_schedule(const Tile_coord& dest, int dist) {
	int mapnum = get_map_num();
	if (mapnum < 0) {
		mapnum = gmap->get_num();
	}
	if ((mapnum != gmap->get_num())
		|| (!gmap->is_chunk_read(get_cx(), get_cy())
			&& !gmap->is_chunk_read(
					dest.tx / c_tiles_per_chunk,
					dest.ty / c_tiles_per_chunk))) {
		// Not on current map, or
		//   src, dest. are off the screen
		// Teleport if more than dist tiles from target
		if (distance(dest) > dist) {
			move(dest.tx, dest.ty, dest.tz, mapnum);
			change_frame(get_dir_framenum(Actor::standing));
		}
		return true;
	}
	return false;
}

/*
 *  Set new schedule by type AND location.
 */

void Actor::set_schedule_and_loc(
		int new_schedule_type, const Tile_coord& dest,
		int delay) {    // -1 for random delay.
	stop();             // Stop moving.
	if (schedule) {     // End prev.
		schedule->ending(new_schedule_type);
	}
	old_schedule_loc = dest;
	if (teleport_offscreen_to_schedule(dest, 12)) {
		set_schedule_type(new_schedule_type);
		return;
	}
	// Going to walk there.
	schedule_loc  = dest;
	next_schedule = new_schedule_type;
	if (schedule_type == Schedule::walk_to_schedule) {
		set_action(nullptr);    // Force NPC to go to the right place.
	}
	schedule_type = Schedule::walk_to_schedule;
	schedule      = std::make_unique<Walk_to_schedule>(
            this, dest, next_schedule, delay);
	dormant = false;
	schedule->now_what();
}

static bool in_goblin_village(const Actor* npc) {
	// These boundaries are exact, as far as I can tell; hack-move to the
	// rescue.
	static const TileRect gobvillage(576, 1200, 256, 336);
	const Tile_coord      loc = npc->get_tile();
	return GAME_SI && gobvillage.has_world_point(loc.tx, loc.ty);
}

/*
 *  Get alignment, taking into account 'charmed' flag.
 */

int Actor::get_effective_alignment() const {
	const bool avatar = (this == gwin->get_main_actor());
	if (!(flags & (1 << Obj_flags::charmed))
		|| (avatar && !Combat::charmed_more_difficult)) {
		// Hack warning: there are some neutral goblins in the goblin village.
		// Here, we 'fix' their alignments to cause them to attack the avatar.
		// The only theory I have to explain why these neutral goblins exist is
		// that it *seems* that only neutral NPCs called guards in the original,
		// and 'call guards in the goblin' village means 'making everyone nearby
		// attack the avatar'.
		// Lets not do this for non-goblins, party members (even if goblins),
		// the avatar, or if in a dungeon -- the boundaries of 'goblin village'
		// overlap some of the surrounding dungeons, and this behavior might not
		// be desired there.
		if (avatar || party_id >= 0 || !is_goblin() || gwin->is_in_dungeon()) {
			return alignment;
		}

		if (in_goblin_village(this)) {
			return evil;
		} else {
			return alignment;
		}
	} else {
		return charmalign;
	}
}

/*
 *  Set effective alignment.
 */

void Actor::set_effective_alignment(int newalign) {
	charmalign = newalign;
	if (!(flags & (1 << Obj_flags::charmed))) {
		alignment = newalign;
	} else {
		set_charmed_combat();
	}
}

/*
 *  Render.
 */

void Actor::paint() {
	const int flag
			= GAME_BG ? Obj_flags::bg_dont_render : Obj_flags::dont_render;
	if (cheat.in_map_editor() || !(flags & (1L << flag))) {
		int xoff;
		int yoff;
		gwin->get_shape_location(this, xoff, yoff);
		const bool invis = flags & (1L << Obj_flags::invisible);
		if (invis && party_id < 0 && npc_num != 0) {
			return;    // Don't render invisible NPCs not in party.
		} else if (invis) {
			paint_invisible(xoff, yoff);
		} else {
			paint_shape(xoff, yoff, true);
		}

		paint_weapon();
		if (hit) {    // Want a momentary red outline.
			ShapeID::paint_outline(xoff, yoff, HIT_PIXEL);
		} else if (
				flags
				& ((1L << Obj_flags::protection) | (1L << Obj_flags::poisoned)
				   | (1 << Obj_flags::cursed) | (1 << Obj_flags::charmed)
				   | (1 << Obj_flags::paralyzed))) {
			if (flags & (1L << Obj_flags::charmed)) {
				ShapeID::paint_outline(xoff, yoff, CHARMED_PIXEL);
			} else if (flags & (1L << Obj_flags::paralyzed)) {
				ShapeID::paint_outline(xoff, yoff, PARALYZE_PIXEL);
			} else if (flags & (1L << Obj_flags::protection)) {
				ShapeID::paint_outline(xoff, yoff, PROTECT_PIXEL);
			} else if (flags & (1L << Obj_flags::cursed)) {
				ShapeID::paint_outline(xoff, yoff, CURSED_PIXEL);
			} else {
				ShapeID::paint_outline(xoff, yoff, POISON_PIXEL);
			}
		}
	}
}

/*
 *  Draw the weapon in the actor's hand (if any).
 */
void Actor::paint_weapon() {
	int weapon_x;
	int weapon_y;
	int weapon_frame;
	if (figure_weapon_pos(weapon_x, weapon_y, weapon_frame)) {
		const int    shnum = get_effective_weapon_shape();
		ShapeID      wsid(shnum, weapon_frame);
		Shape_frame* wshape = wsid.get_shape();
		if (!wshape) {
			weapon_rect.w = 0;
			return;
		}
		// Set dirty area rel. to NPC.
		weapon_rect = gwin->get_shape_rect(wshape, weapon_x, weapon_y);
		// Paint the weapon shape using the actor's coordinates
		int xoff;
		int yoff;
		gwin->get_shape_location(this, xoff, yoff);
		xoff += weapon_x;
		yoff += weapon_y;

		if (flags & (1L << Obj_flags::invisible)) {
			wsid.paint_invisible(xoff, yoff);
		} else {
			wsid.paint_shape(xoff, yoff);
		}
	} else {
		weapon_rect.w = 0;
	}
}

/*
 *  Figure weapon drawing info.  We need this in advance to set the dirty
 *  rectangle.
 *
 *  Output: false if don't need to paint weapon.
 */
/* Weapon frames:
	0 - normal item
	1 - in hand, actor facing north/south
	2 - attacking (pointing north)
	3 - attacking (pointing east)
	4 - attacking (pointing south)
*/

bool Actor::figure_weapon_pos(
		int& weapon_x, int& weapon_y,    // Pos. rel. to NPC.
		int& weapon_frame) {
	unsigned char actor_x;
	unsigned char actor_y;
	unsigned char wx;
	unsigned char wy;
	if ((spots[lhand] == nullptr)
		&& (get_casting_mode() != Actor::show_casting_frames)) {
		return false;
	}
	// Get offsets for actor shape
	const int myframe = get_framenum();
	get_info().get_weapon_offset(myframe & 0x1f, actor_x, actor_y);
	// Get weapon frames for actor frame:
	switch (myframe & 0x1f) {
	case 4:
	case 7:
	case 22:
	case 25:
		weapon_frame = 4;
		break;
	case 5:
	case 8:
	case 21:
	case 24:
		weapon_frame = 3;
		break;
	case 6:
	case 9:
	case 20:
	case 23:
		weapon_frame = 2;
		break;
		// The next cases (before the default) are here to make use of all
		// the frames of the "casting frames" shape (shape 859):
	case 14:
	case 30:
		weapon_frame = 5;
		break;
	case 15:
		weapon_frame = 6;
		break;
	case 31:
		weapon_frame = 7;
		break;

	default:
		weapon_frame = 1;
	}
	weapon_frame |= (myframe & 32);

	// Get offsets for weapon shape
	const int         shnum = get_effective_weapon_shape();
	const Shape_info& info  = ShapeID::get_info(shnum);
	info.get_weapon_offset(weapon_frame & 0xf, wx, wy);

	// actor_x will be 255 if (for example) the actor is lying down
	// wx will be 255 if the actor is not holding a proper weapon
	if (actor_x != 255 && wx != 255) {
		// Store offsets rel. to NPC.
		weapon_x = wx - actor_x;
		weapon_y = wy - actor_y;
		// Need to swap offsets if actor's shape is reflected
		if (myframe & 32) {
			swap(weapon_x, weapon_y);
		}
		// Combat frames are already done.
		return true;
	} else {
		return false;
	}
}

/*
 *  Run usecode when double-clicked.
 */
void Actor::activate(int event) {
	if (edit()) {
		return;
	}

	const bool show_party_inv
			= gumpman->showing_gumps(true) || gwin->in_combat();
	auto sched = static_cast<Schedule::Schedule_types>(get_schedule_type());
	if (party_id >= 0 && !can_act_charmed()
		&&    // if in party, charmed, and charmed more difficult
		!cheat.in_pickpocket()
		&& event == 1) {    // and not pickpocket, return if double click
		return;
	}
	if (!npc_num ||                             // Avatar
		(show_party_inv && party_id >= 0) ||    // Party
		// Pickpocket cheat && double click
		(cheat.in_pickpocket() && event == 1)) {
		show_inventory();
	}
	// Asleep (but not awakened)?
	else if (
			(sched == Schedule::sleep
			 && (get_framenum() & 0xf) == Actor::sleep_frame)
			|| get_flag(Obj_flags::asleep)) {
		return;
	} else if (sched == Schedule::combat && party_id < 0) {
		return;    // Too busy fighting.
	}
	// Usecode
	// Failed copy-protection?
	else if (gwin->failed_copy_protection()) {
		ucmachine->call_usecode(
				FailCopyProtectionUsecode, this,
				static_cast<Usecode_machine::Usecode_events>(event));
	} else if (usecode == -1) {
		ucmachine->call_usecode(
				get_usecode(), this,
				static_cast<Usecode_machine::Usecode_events>(event));
	} else if (party_id >= 0 || !gwin->is_time_stopped()) {
		ucmachine->call_usecode(
				get_usecode(), this,
				static_cast<Usecode_machine::Usecode_events>(event));
	}
}

/*
 *  Edit in ExultStudio.
 *
 *  Output: True if map-editing & ES is present.
 */

bool Actor::edit() {
#ifdef USE_EXULTSTUDIO
	if (client_socket >= 0 &&    // Talking to ExultStudio?
		cheat.in_map_editor()) {
		editing.reset();
		const Tile_coord t = get_tile();
		int              num_schedules;    // Set up schedule-change list.
		Schedule_change* changes;
		get_schedules(changes, num_schedules);
		Serial_schedule schedules[8];
		for (int i = 0; i < num_schedules; i++) {
			schedules[i].time  = changes[i].get_time();
			schedules[i].type  = changes[i].get_type();
			const Tile_coord p = changes[i].get_pos();
			schedules[i].tx    = p.tx;
			schedules[i].ty    = p.ty;
			schedules[i].tz    = p.tz;
		}
		if (Npc_actor_out(
					client_socket, this, t.tx, t.ty, t.tz, get_shapenum(),
					get_framenum(), get_face_shapenum(), name, npc_num, ident,
					usecode, usecode_name, properties, attack_mode, alignment,
					flags, flags2, type_flags, num_schedules, schedules)
			!= -1) {
			cout << "Sent npc data to ExultStudio" << endl;
			editing = shared_from_this();
		} else {
			cout << "Error sending npc data to ExultStudio" << endl;
		}
		return true;
	}
#endif
	return false;
}

/*
 *  Message to update from ExultStudio.
 */

void Actor::update_from_studio(unsigned char* data, int datalen) {
#ifdef USE_EXULTSTUDIO
	Actor*          npc;
	int             tx;
	int             ty;
	int             tz;
	int             shape;
	int             frame;
	int             face;
	std::string     name;
	short           npc_num;
	short           ident;
	int             usecode;
	std::string     usecodefun;
	int             properties[12];
	short           attack_mode;
	short           alignment;
	unsigned long   oflags;        // Object flags.
	unsigned long   xflags;        // Extra object flags.
	unsigned long   type_flags;    // Movement flags.
	short           num_schedules;
	Serial_schedule schedules[8];
	if (!Npc_actor_in(
				data, datalen, npc, tx, ty, tz, shape, frame, face, name,
				npc_num, ident, usecode, usecodefun, properties, attack_mode,
				alignment, oflags, xflags, type_flags, num_schedules,
				schedules)) {
		cout << "Error decoding npc" << endl;
		return;
	}
	if (npc && npc != editing.get()) {
		cout << "Npc from ExultStudio is not being edited" << endl;
		return;
	}
	// Keeps NPC alive until end of function
	Game_object_shared keep = std::move(editing);
	if (!npc) {    // Create a new one?
		int x;
		int y;
		if (!Get_click(x, y, Mouse::hand, nullptr)) {
			if (client_socket >= 0) {
				Exult_server::Send_data(client_socket, Exult_server::cancel);
			}
			return;
		}
		// Create.  Gets initialized below.
		Actor_shared act
				= std::make_shared<Npc_actor>(name, shape, npc_num, usecode);
		npc               = act.get();
		keep              = std::move(act);
		npc->usecode_name = usecodefun;
		if (!usecodefun.empty()) {
			npc->usecode = ucmachine->find_function(usecodefun.c_str(), true);
		}
		npc->usecode_assigned = npc_num >= 256 && npc->usecode != -1 &&

								npc->usecode != 0x400 + npc_num;

		npc->set_invalid();    // Set to invalid position.
		int lift;              // Try to drop at increasing hts.
		for (lift = 0; lift < 12; lift++) {
			if (gwin->drop_at_lift(npc, x, y, lift)) {
				break;
			}
		}
		if (lift == 12) {
			if (client_socket >= 0) {
				Exult_server::Send_data(client_socket, Exult_server::cancel);
			}
			return;
		}
		gwin->add_npc(npc, npc_num);
		if (client_socket >= 0) {
			Exult_server::Send_data(
					client_socket, Exult_server::user_responded);
		}
	} else {    // Old.
		npc->add_dirty();
		npc->usecode_name = usecodefun;
		if (!usecodefun.empty()) {
			npc->usecode = ucmachine->find_function(usecodefun.c_str(), true);
		} else {
			npc->usecode = usecode;
		}
		npc->usecode_assigned = npc_num >= 256 && npc->usecode != -1 &&

								npc->usecode != 0x400 + npc_num;

		npc->set_npc_name(name.c_str());
	}
	// Ensure proper initialization of frame #:
	npc->set_shape(shape, frame);
	npc->add_dirty();
	npc->face_num = face;
	npc->set_ident(ident);
	int i;
	for (i = 0; i < 12; i++) {
		npc->set_property(i, properties[i]);
	}
	npc->set_attack_mode(static_cast<Actor::Attack_mode>(attack_mode));
	npc->set_alignment(alignment);
	if (!(npc->flags & (1 << Obj_flags::charmed))) {
		npc->charmalign = alignment;
	}
	npc->flags      = oflags;
	npc->flags2     = xflags;
	npc->type_flags = type_flags;
	npc->set_actor_shape();
	Schedule_change* scheds
			= num_schedules ? new Schedule_change[num_schedules] : nullptr;
	for (i = 0; i < num_schedules; i++) {
		scheds[i].set(
				schedules[i].tx, schedules[i].ty, schedules[i].tz,
				schedules[i].type, schedules[i].time);
	}
	npc->set_schedules(scheds, num_schedules);
	// Force Avatar and party members to be good
	if (npc_num == 0 || npc->get_flag(Obj_flags::in_party)) {
		npc->set_alignment(good);
	}
	cout << "Npc updated" << endl;
#else
	ignore_unused_variable_warning(data, datalen);
#endif
}

void Actor::show_inventory() {
	Gump_manager* gump_man = gumpman;

	const int shapenum = inventory_shapenum();
	if (shapenum >= 0) {
		gump_man->add_gump(this, shapenum, true);
	}
}

int Actor::inventory_shapenum() {
	// We are serpent if we can use serpent isle paperdolls
	const bool serpent
			= (sman->can_use_paperdolls() && sman->are_paperdolls_enabled());

	if (!serpent) {
		// Can't display paperdolls (or they are disabled)
		// Use BG gumps
		int gump = get_info().get_gump_shape();
		if (gump < 0) {
			gump = ShapeID::get_info(get_sexed_coloured_shape())
						   .get_gump_shape();
		}
		if (gump < 0) {
			gump = ShapeID::get_info(get_shape_real()).get_gump_shape();
		}
		if (gump < 0) {
			const int shape = get_type_flag(Actor::tf_sex)
									  ? Shapeinfo_lookup::GetFemaleAvShape()
									  : Shapeinfo_lookup::GetMaleAvShape();
			gump            = ShapeID::get_info(shape).get_gump_shape();
		}
		if (gump < 0) {
			// No gump at ALL; should never happen...
			return 65;    // Default to male (Pickpocket Cheat)
		}

		return gump;
	} else {           /* if (serpent) */
		return 123;    // Show paperdolls
	}
}

/*
 *  Drop another onto this.
 *
 *  Output: false to reject, true to accept.
 */

bool Actor::drop(Game_object* obj    // MAY be deleted (if combined).
) {
	if (is_in_party()) {    // In party?
		const bool res
				= add(obj, false, true);    // We'll take it, and combine.
		const int ind = find_readied(obj);
		if (ind >= 0) {
			call_readied_usecode(ind, obj, Usecode_machine::readied);
		}
		return res;
	} else {
		return false;
	}
}

/*
 *  Get name.
 */

string Actor::get_name() const {
	return !get_flag(Obj_flags::met) ? Game_object::get_name() : get_npc_name();
}

/*
 *  Get npc name.
 */

string Actor::get_npc_name() const {
	return name.empty() ? Game_object::get_name() : name;
}

/*
 *  Set npc name.
 */

void Actor::set_npc_name(const char* n) {
	name = n;
}

/*
 *  Set property.
 */
void Actor::set_property(int prop, int val) {
	if (prop == health && ((party_id != -1) || (npc_num == 0))
		&& cheat.in_god_mode() && val < properties[prop]) {
		return;
	}
	// The originals have a cap of 999999 exp.
	constexpr const int max_exp = 999999;
	// The originals have a cap of 255 training points.
	constexpr const int max_training = 255;
	switch (static_cast<Item_properties>(prop)) {
	case exp: {
		// Experience.
		if (val > max_exp) {
			val = max_exp;
		}
		// Check for new level.
		const int old_level               = get_level();
		properties[static_cast<int>(exp)] = val;
		const int delta                   = get_level() - old_level;
		if (delta > 0) {
			int train_delta = 3 * delta;
			if (train_delta > max_training) {
				train_delta = max_training;
			}
			properties[static_cast<int>(training)] += train_delta;
		}
		break;
	}
	case food_level:
		if (val > 31) {    // Never seems to get above this.
			val = 31;
		} else if (val < 0) {
			val = 0;
		}
		properties[prop] = val;
		break;
	case combat:    // limited to 30.
		properties[prop] = val > 30 ? 30 : val;
		break;
	case magic: {
		const int old_val = properties[prop];
		properties[prop]  = val > 30 ? 30 : val;    // limited to 30.
		// check if magic changes to and from 0
		if (is_in_party() && old_val != val && (old_val == 0 || val == 0)) {
			Face_stats::UpdateButtons();
		}
		break;
	}
	case training:
		// Don't let this go negative.
		if (val >= 0) {
			if (val > max_training) {
				val = max_training;
			}
			properties[prop] = val;
		}
		break;
	case sex_flag:
		// Doesn't seem to be settable in original BG except by hex-editing
		// the save game, but there is no problem in allowing it in Exult.
		if (val != 0) {
			set_type_flag(tf_sex);
		} else {
			clear_type_flag(tf_sex);
		}
		break;
	case health:
		if (val > properties[prop]) {
			clear_type_flag(Actor::tf_bleeding);    // Stop bleeding.
		}
		properties[prop] = val;
		break;
	default:
		if (prop >= 0 && prop < missile_weapon) {
			properties[prop] = val;
		}
		break;
	}
	if (gumpman->showing_gumps()) {
		gwin->set_all_dirty();
	}
}

/*
 *  A class whose whole purpose is to stop casting mode.
 */
class Clear_casting : public Time_sensitive {
	Game_object_weak actor;

public:
	Clear_casting(Actor* a) : actor(weak_from_obj(a)) {}

	void handle_event(unsigned long curtime, uintptr udata) override;
};

void Clear_casting::handle_event(unsigned long curtime, uintptr) {
	ignore_unused_variable_warning(curtime);
	const Actor_shared a = std::static_pointer_cast<Actor>(actor.lock());
	if (a) {
		a->add_dirty();
		a->hide_casting_frames();
		a->add_dirty();
	}
	delete this;
}

void Actor::end_casting_mode(int delay) {
	auto* c = new Clear_casting(this);
	gwin->get_tqueue()->add(Game::get_ticks() + 2 * delay, c, this);
}

/*
 *  A class whose whole purpose is to clear the 'hit' flag.
 */
class Clear_hit : public Time_sensitive {
	Game_object_weak actor;

public:
	Clear_hit(Actor* a) : actor(weak_from_obj(a)) {}

	void handle_event(unsigned long curtime, uintptr udata) override;
};

void Clear_hit::handle_event(unsigned long curtime, uintptr) {
	ignore_unused_variable_warning(curtime);
	const Actor_shared a = std::static_pointer_cast<Actor>(actor.lock());
	if (a) {
		a->hit = false;
		a->add_dirty();
	}
	delete this;
}

bool Actor::can_act() {
	return !(
			get_flag(Obj_flags::paralyzed) || get_flag(Obj_flags::asleep)
			|| is_dead() || is_knocked_out());
}

bool Actor::can_act_charmed() {
	return !Combat::charmed_more_difficult || get_effective_alignment() == good;
}

/*
 *  Have charmed party members attack if charmed_more_difficult and party member
 * is hostile
 */

void Actor::set_charmed_combat() {
	if (Combat::charmed_more_difficult
		&& (is_in_party() || this == gwin->get_main_actor())
		&& get_effective_alignment() != good) {
		set_schedule_type(Schedule::combat);
		if (get_attack_mode() == flee) {
			set_attack_mode(nearest);
		}
	}
}

void Actor::fight_back(Game_object* attacker) {
	// ++++ TODO: I think that nearby NPCs will help NPCs (or party members,
	// as the case may be) of the same alignment when attacked by other NPCs,
	// not just when the avatar & party attack. Although this is tricky to
	// test (except, maybe, by exploiting the agressive U7 & SI duel schedule.
	Actor* npc = attacker ? attacker->as_actor() : nullptr;
	// No attacker, or friendly fire, should not cause a fight.
	if (!npc || get_effective_alignment() == npc->get_effective_alignment()) {
		return;
	}
	if (is_in_party() && (gwin->in_combat() || !gwin->main_actor_can_act())) {
		if (!gwin->in_combat()) {
			gwin->toggle_combat();
		}
		Actor*    party[9];    // Get entire party, including Avatar.
		const int cnt = gwin->get_party(party, 1);
		for (int i = 0; i < cnt; i++) {
			const int sched = party[i]->get_schedule_type();
			if (sched != Schedule::combat && sched != Schedule::wait
				&& sched != Schedule::loiter) {
				party[i]->set_schedule_type(Schedule::combat);
			}
		}
	}
	if (!target.lock() && !is_in_party()) {
		set_target(npc, npc->get_schedule_type() != Schedule::duel);
	}
	// Being a bully?
	if (npc->is_in_party() && !is_in_party() && is_sentient()) {
		Actor*    witness = this;
		Actor*    closest = nullptr;
		const int align   = get_effective_alignment();
		// Attack avatar if the NPC is not disabled...
		if (can_act() ||
			// ... or if there is a sympathetic witness or local guard...
			(witness = gwin->find_witness(closest, align)) != nullptr ||
			// ... or if there is someone sympathetic nearby who heard it.
			((witness = closest) != nullptr && rand() % 10 == 0)) {
			static long lastcall = 0L;    // Last time yelled.
			const long  curtime  = SDL_GetTicks();
			const long  delta    = curtime - lastcall;
			// Call if 10 secs. has passed or by the luck of the die.
			if ((delta > 10000) || (rand() % 20 == 0)) {
				int       numguards = 0;
				const int gshape    = Game_window::get_guard_shape();
				// No guards in dungeons or if gshape < 0.
				if (!gwin->is_in_dungeon() && gshape >= 0 &&
					// And only neutral NPCs and guards call more guards.
					(witness->get_shapenum() == gshape
					 || align == Actor::neutral)) {
					numguards = 1 + rand() % 2;
				}

				eman->remove_text_effect(this);
				if (numguards > 0) {
					// Call guards.
					if (witness->is_goblin()) {
						witness->say(
								first_goblin_call_police,
								last_goblin_call_police);
					} else if (witness->can_speak()) {
						witness->say(first_call_police, last_call_police);
					}
				} else {
					// Cry for help.
					if (witness->is_goblin()) {
						witness->say(goblin_need_help);
					} else if (witness->can_speak()) {
						witness->say(first_need_help, last_need_help);
					}
				}
				// To reduce the guard pile-up.
				lastcall = curtime;
				gwin->attack_avatar(numguards, align);
			}
		}
	}
}

/*
 *  This method should be called to cause damage from traps, attacks.
 *
 *  Output: Hits taken. If exp is nonzero, experience value if defeated.
 */

int Actor::apply_damage(
		Game_object* attacker,    // Attacker, or null.
		int          str,         // Attack strength.
		int          wpoints,     // Weapon bonus.
		int          type,        // Damage type.
		int          bias,        // Different combat difficulty.
		int*         exp) {
	if (exp) {
		*exp = 0;
	}
	int damage = bias;
	str /= 3;

	// In the original, wpoints == 127 does fixed 127 damage.
	// Allowing for >= 127 in Exult, as the original seems to
	// use only a byte for damage/health.
	if (wpoints >= 127) {
		damage = 127;
	} else {
		// Lightning damage ignores strength.
		if (type != Weapon_data::lightning_damage && str > 0) {
			damage += (1 + rand() % str);
		}
		if (wpoints > 0) {
			damage += (1 + rand() % wpoints);
		}
	}

	int                 armor = -bias;
	const Monster_info* minf  = get_info().get_monster_info();
	// Monster armor protects only in UI_apply_damage.
	if (minf) {
		armor += minf->get_armor();
	}

	// Armor defense and immunities only affect UI_apply_damage.
	for (Game_object* obj : spots) {
		if (obj) {
			const Shape_info& info = obj->get_info();
			armor += info.get_armor();
			if ((info.get_armor_immunity() & (1 << type)) != 0) {
				// Armor gives immunity.
				// Metal clang.
				Object_sfx::Play(this, Audio::game_sfx(5));
				// Attack back anyway.
				fight_back(attacker);
				return 0;    // No damage == no powers.
			}
		}
	}

	// Some attacks ignore armor (unless the armor gives immunity).
	if (wpoints == 127 || type == Weapon_data::lightning_damage
		|| type == Weapon_data::ethereal_damage
		|| type == Weapon_data::sonic_damage
		|| armor < 0) {    // Armor should never help the attacker.
		armor = 0;
	}

	if (armor) {
		damage -= (1 + rand() % armor);
	}

	// Paralyzed/defenseless foes may take damage even if
	// the armor protects them. This code is guesswork,
	// but it matches statistical tests.
	if (damage <= 0 && !can_act()) {
		if (str > 0) {
			damage = 1 + rand() % str;
		} else {
			damage = 0;
		}
	}

	if (damage <= 0) {
		// No damage caused.
		Object_sfx::Play(this, Audio::game_sfx(5));

		// Flash red outline.
		hit = true;
		add_dirty();
		auto* c = new Clear_hit(this);
		gwin->get_tqueue()->add(Game::get_ticks() + 200, c, this);
		// Attack back.
		fight_back(attacker);
		return 0;    // No damage == no powers (usually).
	}

	return reduce_health(damage, type, attacker, exp);
}

/*
 *  This method creates a blood pool where the actor stands.
 */

void Actor::bleed(int first_frame, int last_frame, Tile_coord loc) const {
	// TODO: de-hard-code these.
	const int          blood_shape = 912;
	Game_object_vector blood_vec;
	// Don't add blood in a tile if it is already there.
	if (find_nearby(blood_vec, get_tile(), blood_shape, 0, 0x80)) {
		// Lets try increasing size instead.
		for (auto* blood : blood_vec) {
			if (!blood) {
				continue;
			}
			int blood_frame = blood->get_framenum() % 32;
			if (blood_frame < first_frame || blood_frame > last_frame) {
				continue;
			}
			if (blood_frame < last_frame) {
				blood_frame++;
				if (rand() % 2) {
					blood_frame |= 32;
				}
				blood->set_frame(blood_frame);
			}
			return;
		}
	}
	// Create blood where actor stands.
	int num_frames = last_frame - first_frame + 1;
	if (num_frames > 2) {
		// Lets start with a smaller pool.
		num_frames = 2;
	}
	int blood_frame = first_frame + (rand() % num_frames);
	if (rand() % 2) {
		blood_frame |= 32;
	}
	const Game_object_shared bobj
			= gmap->create_ireg_object(blood_shape, blood_frame);
	bobj->set_flag(Obj_flags::is_temporary);
	bobj->move(loc);
}

void Actor::bleed() const {
	const Monster_info* minf = get_info().get_monster_info_safe();
	if (minf->cant_bleed()) {
		return;
	}
	// TODO: de-hard-code these.
	const int first_blood_frame = 0;
	const int last_blood_frame  = 3;
	bleed(first_blood_frame, last_blood_frame, get_tile());
}

/*
 *  This method should be called to decrement health directly.
 *
 *  Output: Hits taken. If exp is nonzero, experience value if defeated.
 */

int Actor::reduce_health(
		int          delta,       // # points to lose.
		int          type,        // Type of damage
		Game_object* attacker,    // Attacker, or null.
		int*         exp) {
	if (exp) {
		*exp = 0;
	}
	// Cheater, cheater.
	if (is_dead()
		|| (cheat.in_god_mode() && ((party_id != -1) || (npc_num == 0)))) {
		return 0;
	}

	const Monster_info* minf = get_info().get_monster_info_safe();
	Actor*              npc  = attacker ? attacker->as_actor() : nullptr;

	// Monster immunities DO affect UI_reduce_health, unlike
	// armor immunities.
	if (is_dead() || minf->cant_die()
		|| (minf->get_immune() & (1 << type)) != 0) {
		// Monster data gives immunity to damage.
		// Attack back.
		fight_back(attacker);
		return 0;
	}

	// Monsters vulnerable to a damage type take 2x the damage.
	// The originals seem to limit damage to 127 points; we
	// set a lower bound on final health below.
	if ((minf->get_vulnerable() & (1 << type)) != 0) {
		delta *= 2;
	}

	const int oldhp = properties[static_cast<int>(health)];
	const int maxhp = properties[static_cast<int>(strength)];
	int       val   = oldhp - delta;
	if (val < -50) {
		// Limit how low it goes for safety.
		val   = -50;
		delta = oldhp + 50;
	}
	// Don't set health yet!! (see tournament below for why)
	// The following thresholds are exact.
	if (this == gwin->get_main_actor() &&
		// Flash red if Avatar badly hurt.
		(delta >= maxhp / 3 || oldhp < maxhp / 4 ||
		 // Or if lightning damage.
		 type == Weapon_data::lightning_damage)) {
		gwin->get_pal()->flash_red();
	} else {
		hit = true;    // Flash red outline.
		add_dirty();
		auto* c = new Clear_hit(this);
		gwin->get_tqueue()->add(Game::get_ticks() + 200, c, this);
	}
	if (oldhp >= maxhp / 2 && val < maxhp / 2 && rand() % 2 != 0) {
		// A little oomph.
		if (is_goblin()) {    // Goblin?
			say(goblin_ouch);
		} else if (can_speak()) {
			say(first_ouch, last_ouch);
		}
	}
	Game_object_vector vec;            // Create blood.
	const int          blood = 912;    // TODO: de-hard-code this.
	// Bleed only for normal damage.
	if (type == Weapon_data::normal_damage
		&& !minf->cant_bleed()
		// Trying something new. Seems to match originals better, but
		// it is hard to judge accurately (although 10 or more hits
		// *always* cause bleeding).
		&& rand() % 10 < delta && find_nearby(vec, blood, 1, 0) < 2) {
		set_type_flag(Actor::tf_bleeding);
	}
	if (val <= 0 && oldhp > 0 && get_flag(Obj_flags::tournament)) {
		// HPs are never reduced before tournament usecode
		// (this can be checked on weapon usecode, tournament
		// usecode or even UI_reduce_health directly followed
		// by UI_get_npc_prop).
		// THIS is why we haven't reduced health yet.
		// This makes foes with tournament flag EXTREMELLY
		// tough, particularly if they have high hit points
		// to begin with!
		// No more pushover banes!
		if (npc) {    // Just to be sure.
			set_oppressor(npc->get_npc_num());
			// Unset target, so that we are not endlessly pursuing
			// fleeing targets that no longer take damage in
			// tournament mode.
			npc->set_target(nullptr);
		}
		ucmachine->call_usecode(get_usecode(), this, Usecode_machine::died);
		return 0;    // If needed, NPC usecode does the killing (possibly
					 // by calling this function again).
	}

	// We do slimes here; they DO split through reduce_health intrinsic.
	// They also do *not* split if hit by damage they are vulnerable to.
	if (minf->splits() && val > 0 && (minf->get_vulnerable() & (1 << type)) == 0
		&& rand() % 2 == 0) {
		clone();
	}

	// Doing this here simplifies the tournament code, above.
	properties[static_cast<int>(health)] = val;
	const bool defeated = is_dying() || (val <= 0 && oldhp > 0);

	if (defeated && exp) {
		// Verified: No experience for killing sleeping people.
		if (!get_flag(Obj_flags::asleep)) {
			int expval = 0;
			// Except for 2 details mentioned below, this formula
			// is an exact match to what the originals give.
			// We also have to do this *here*, before we kill the
			// NPC, because the equipment is deleted (spells) or
			// transferred to the dead body it leaves.
			const int combval = properties[static_cast<int>(combat)];
			expval            = properties[static_cast<int>(strength)] + combval
					 + (properties[static_cast<int>(dexterity)] + 1) / 3
					 + properties[static_cast<int>(intelligence)] / 5;
			const Monster_info* minf   = get_info().get_monster_info();
			int                 immune = minf ? minf->get_immune() : 0;
			int                 vuln   = minf ? minf->get_vulnerable() : 0;
			if (minf) {
				expval += minf->get_base_xp_value();
			}

			if (!objects.is_empty()) {
				Game_object_vector vec;    // Get list of all possessions.
				vec.reserve(50);
				get_objects(vec, c_any_shapenum, c_any_qual, c_any_framenum);
				for (auto* obj : vec) {
					// This matches the original, but maybe
					// we should iterate through all items.
					// After all, a death bolt in the backpack
					// can still be dangerous...
					if (obj->get_owner() != this) {
						continue;
					}
					const Shape_info& inf = obj->get_info();
					expval += inf.get_armor();
					// Strictly speaking, the original does not give
					// XP for armor immunities; but I guess this is
					// mostly because very few armors give immunities
					// (ethereal ring, cadellite helm) and no monsters
					// use them anyway.
					// I decided to have them give a (non-cumulative)
					// increase in experience.
					immune |= inf.get_armor_immunity();
					const Weapon_info* winf = inf.get_weapon_info();
					if (!winf) {
						continue;
					}
					expval += winf->get_base_xp_value();
					// This was tough to figure out, but figured out it was;
					// it is a perfect match to what the original does.
					switch (winf->get_uses()) {
					case Weapon_info::melee: {
						const int range = winf->get_range();
						expval += range > 5 ? 2 : (range > 3 ? 1 : 0);
						break;
					}
					case Weapon_info::poor_thrown:
						expval += combval / 5;
						break;
					case Weapon_info::good_thrown:
						expval += combval / 3;
						break;
					case Weapon_info::ranged:
						expval += winf->get_range() / 2;
						break;
					}
				}
			}
			// Originals don't do this, but hey... they *should*.
			// Also, being vulnerable to something you are immune
			// should not matter because immunities are checked first;
			// the originals don't do this check, but neither do they
			// have a monster vulnerable and immune to the same thing.
			vuln &= ~immune;
			expval += bitcount(immune);
			expval -= bitcount(vuln);
			// And the final touch (verified).
			expval /= 2;
			*exp = expval;
		}
	}

	// query this here because die() will reset is_in_party.
	const bool in_party = is_in_party();

	if (is_dying()) {
		die(attacker);
	} else if (val <= 0 && !get_flag(Obj_flags::asleep)) {
		Combat_schedule::stop_attacking_npc(this);
		set_flag(Obj_flags::asleep);
	} else if (npc && !target.lock() && !in_party) {
		set_target(npc, npc->get_schedule_type() != Schedule::duel);
		set_oppressor(npc->get_npc_num());
	}

	// Dead people caused attacks on the avatar back in Actor::die, so don't do
	// it again here.
	if (!is_dead()) {
		fight_back(attacker);
	}
	return delta;
}

/*
 *  Causes the actor to fall to the ground and take damage.
 */

void Actor::fall_down() {
	if (!get_type_flag(tf_fly)) {
		return;
	}
	const int  savetz = get_lift();
	Tile_coord start  = get_tile();
	if (!Map_chunk::is_blocked(start, 1, MOVE_WALK, 100) && start.tz < savetz) {
		move(start.tx, start.ty, start.tz);
		reduce_health(1 + rand() % 5, Weapon_data::normal_damage);
	}
}

/*
 *  Causes the actor to lie down to sleep (or die).
 */

void Actor::lay_down(bool die) {
	if (!die && get_flag(Obj_flags::asleep)) {
		return;
	}
	// Fall to the ground.
	fall_down();
	const bool frost_serp = GAME_SI && get_shapenum() == 832;
	// Don't do it if already in sleeping frame.
	if (frost_serp && (get_framenum() & 0xf) == Actor::sit_frame) {
		return;    // SI Frost serpents are weird.
	} else if ((get_framenum() & 0xf) == Actor::sleep_frame) {
		return;
	}

	set_action(nullptr);
	auto* scr = new Usecode_script(this);
	(*scr) << Ucscript::finish << Ucscript::npc_standing_frame;
	if (GAME_SI && get_shapenum() == 832) {    // SI Frost serpent
		// Frames are in reversed order. This results in a
		// strangeanimation in the original, which we fix here.
		(*scr) << Ucscript::npc_sleep_frame << Ucscript::npc_kneel_frame
			   << Ucscript::npc_bow_frame << Ucscript::npc_sit_frame;
	} else if (get_info().has_strange_movement()) {
		// BG Sea serpent; slimes are done elsewhere.
		(*scr) << Ucscript::npc_bow_frame << Ucscript::npc_kneel_frame
			   << Ucscript::npc_sleep_frame;
	} else {
		(*scr) << Ucscript::npc_kneel_frame << Ucscript::sfx
			   << Audio::game_sfx(86);
		if (!die) {
			(*scr) << Ucscript::npc_sleep_frame;
		}
	}
	if (die) {    // If dying, remove.
		(*scr) << Ucscript::remove;
	}
	scr->start();
}

/*
 *  Get a property.
 */

int Actor::get_property(int prop) const {
	if (prop == Actor::sex_flag) {
		// Correct in BG and SI, but the flag is never normally set
		// for anyone but avatar in BG.
		return get_type_flag(Actor::tf_sex);
	} else if (prop == Actor::missile_weapon) {
		// Seems to give the same results as in the originals.
		Game_object*       weapon = get_readied(lhand);
		const Weapon_info* winf
				= weapon ? weapon->get_info().get_weapon_info() : nullptr;
		if (!winf) {
			return 0;
		}
		return winf->get_uses() >= 2;
	}
	return (prop >= 0 && prop < Actor::sex_flag) ? properties[prop] : 0;
}

/*
 *  Get a property, modified by flags.
 */

int Actor::get_effective_prop(int prop    // Property #.
) const {
	int val = get_property(prop);
	switch (prop) {
	case Actor::dexterity:
	case Actor::combat:
		if (get_flag(Obj_flags::paralyzed) || get_flag(Obj_flags::asleep)
			|| is_knocked_out()) {
			return prop == Actor::dexterity ? 0 : 1;
		}
		[[fallthrough]];
	case Actor::intelligence:
		if (is_dead()) {
			return prop == Actor::dexterity ? 0 : 1;
		} else if (
				get_flag(Obj_flags::charmed) || get_flag(Obj_flags::asleep)) {
			val--;
		}
		[[fallthrough]];
	case Actor::strength:
		if (get_flag(Obj_flags::might)) {
			val += (val < 15 ? val : 15);    // Add up to 15.
		}
		if (get_flag(Obj_flags::cursed)) {
			val -= 3;    // Matches originals.
		}
		break;
	}
	return val;
}

/*
 *  For mods and new games:  Set generic attribute keyed by a name.
 */

void Actor::set_attribute(const char* nm, int val) {
	if (!atts) {
		atts = std::make_unique<Actor_attributes>();
	}
	atts->set(nm, val);
}

/*
 *  Get generic attribute.  Returns 0 if not set.
 */

int Actor::get_attribute(const char* nm) const {
	return atts ? atts->get(nm) : 0;
}

/*
 *  Get them all.
 */

void Actor::get_attributes(Atts_vector& attlist) const {
	attlist.resize(0);
	if (atts) {
		atts->get_all(attlist);
	}
}

/*
 *  Read in attributes (from savegame file).
 */

void Actor::read_attributes(
		const unsigned char* buf,    // Attribute/value pairs.
		int                  len) {
	const unsigned char* ptr    = buf;
	const unsigned char* endbuf = buf + len;
	while (ptr < endbuf) {
		const char* att = reinterpret_cast<const char*>(ptr);
		ptr += strlen(att) + 1;
		assert(ptr + 2 <= endbuf);
		const int val = little_endian::Read2(ptr);
		set_attribute(att, val);
	}
}

/*
 *  Force actor to sleep.
 */

void Actor::force_sleep() {
	flags |= (static_cast<uint32>(1) << Obj_flags::asleep);
	need_timers()->start_sleep();
	set_action(nullptr);    // Stop what you're doing.
	lay_down(false);        // Lie down.
}

// Want to avoid full include.
extern bool Bg_dont_wake(Game_window* gwin, Actor* npc);

/*
 *  Set flag.
 */

void Actor::set_flag(int flag) {
	//	cout << "Set flag for NPC " << get_npc_num() << " = " << flag << endl;
	const Monster_info* minf   = get_info().get_monster_info_safe();
	Actor*              avatar = gwin->get_main_actor();
	switch (flag) {
	case Obj_flags::asleep:
		if (minf->sleep_safe() || minf->power_safe()
			|| (gear_powers
				& (Frame_flags::power_safe | Frame_flags::sleep_safe))) {
			return;    // Don't do anything.
		}
		// Avoid waking Penumbra.
		if (schedule_type == Schedule::sleep && Bg_dont_wake(gwin, this)) {
			break;
		}
		// Set timer to wake in a few secs.
		if (this != avatar && avatar->get_target() == this) {
			avatar->set_target(nullptr);
		}
		need_timers()->start_sleep();
		set_action(nullptr);    // Stop what you're doing.
		lay_down(false);        // Lie down.
		break;
	case Obj_flags::poisoned:
		if (minf->poison_safe() || (gear_powers & Frame_flags::poison_safe)) {
			return;    // Don't do anything.
		}
		need_timers()->start_poison();
		break;
	case Obj_flags::protection:
		need_timers()->start_protection();
		break;
	case Obj_flags::might:
		need_timers()->start_might();
		break;
	case Obj_flags::cursed:
		if (minf->curse_safe() || minf->power_safe()
			|| (gear_powers
				& (Frame_flags::power_safe | Frame_flags::curse_safe))) {
			return;    // Don't do anything.
		}
		need_timers()->start_curse();
		break;
	case Obj_flags::charmed:
		if (minf->charm_safe() || minf->power_safe()
			|| (gear_powers
				& (Frame_flags::power_safe | Frame_flags::charm_safe))) {
			return;    // Don't do anything.
		}
		need_timers()->start_charm();
		// Actual alignment shift must be done elsewhere.
		Combat_schedule::stop_attacking_npc(this);
		set_target(nullptr);    // Need new opponent if in combat.
		break;
	case Obj_flags::paralyzed:
		if (minf->paralysis_safe() || minf->power_safe()
			|| (gear_powers
				& (Frame_flags::power_safe | Frame_flags::paralysis_safe))) {
			return;    // Don't do anything.
		}
		fall_down();
		need_timers()->start_paralyze();
		break;
	case Obj_flags::invisible:
		flags |= (static_cast<uint32>(1) << flag);
		need_timers()->start_invisibility();
		Combat_schedule::stop_attacking_invisible(this);
		gclock->set_palette();
		break;
	case Obj_flags::dont_move:
	case Obj_flags::bg_dont_move:
		stop();                 // Added 7/6/03.
		set_action(nullptr);    // Force actor to stop current action.
		break;
	case Obj_flags::naked: {
		// set_polymorph needs this, and there are no problems
		// in setting this twice.
		flags2 |= (static_cast<uint32>(1) << (flag - 32));
		if (get_npc_num() != 0) {    // Ignore for all but avatar.
			break;
		}
		int        sn;
		const int  female = get_type_flag(tf_sex) ? 1 : 0;
		Skin_data* skin   = Shapeinfo_lookup::GetSkinInfoSafe(this);

		if (!skin ||    // Should never happen, but hey...
			(!sman->have_si_shapes()
			 && Shapeinfo_lookup::IsSkinImported(skin->naked_shape))) {
			sn = Shapeinfo_lookup::GetBaseAvInfo(female != 0)->shape_num;
		} else {
			sn = skin->naked_shape;
		}
		set_polymorph(sn);
		break;
	}
	}

	// Doing it here to prevent problems with immunities.
	if (flag >= 0 && flag < 32) {
		flags |= (static_cast<uint32>(1) << flag);
	} else if (flag >= 32 && flag < 64) {
		flags2 |= (static_cast<uint32>(1) << (flag - 32));
	}
	// Update stats if open.
	if (gumpman->showing_gumps()) {
		gwin->set_all_dirty();
	}
	set_actor_shape();
}

void Actor::set_type_flag(int flag) {
	if (flag >= 0 && flag < 16) {
		type_flags |= (static_cast<uint32>(1) << flag);
	}
	if (flag == Actor::tf_bleeding) {
		need_timers()->start_bleeding();
	}

	set_actor_shape();
}

/*
 *  Clear flag.
 */

void Actor::clear_flag(int flag) {
	//	cout << "Clear flag for NPC " << get_npc_num() << " = " << flag << endl;
	if (flag >= 0 && flag < 32) {
		flags &= ~(static_cast<uint32>(1) << flag);
	} else if (flag >= 32 && flag < 64) {
		flags2 &= ~(static_cast<uint32>(1) << (flag - 32));
	}
	if (flag == Obj_flags::invisible) {    // Restore normal palette.
		gclock->set_palette();
	} else if (flag == Obj_flags::asleep) {
		if (schedule_type == Schedule::sleep) {
			set_schedule_type(Schedule::stand);
		} else if ((get_framenum() & 0xf) == Actor::sleep_frame) {
			// Find spot to stand.
			Tile_coord pos = get_tile();
			pos.tz -= pos.tz % 5;    // Want floor level.
			pos = Map_chunk::find_spot(
					pos, 6, get_shapenum(), Actor::standing, 0);
			if (pos.tx >= 0) {
				move(pos);
			}
			change_frame(Actor::standing);
		}
		Usecode_script::terminate(this);
	} else if (flag == Obj_flags::charmed) {
		reset_effective_alignment();
		Combat_schedule::stop_attacking_npc(this);
		set_target(nullptr);    // Need new opponent.
	} else if (
			flag == Obj_flags::bg_dont_move || flag == Obj_flags::dont_move) {
		// Start again after a little while
		start_std();
	} else if (flag == Obj_flags::polymorph && get_flag(Obj_flags::naked)) {
		clear_flag(Obj_flags::naked);
	} else if (flag == Obj_flags::naked && get_flag(Obj_flags::polymorph)) {
		clear_flag(Obj_flags::polymorph);
	}

	set_actor_shape();
}

void Actor::clear_type_flag(int flag) {
	if (flag >= 0 && flag < 16) {
		type_flags &= ~(static_cast<uint32>(1) << flag);
	}

	set_actor_shape();
}

/*
 *  Get flags.
 */

bool Actor::get_type_flag(int flag) const {
	return (flag >= 0 && flag < 16)
				   ? (type_flags & (static_cast<uint32>(1) << flag)) != 0
				   : false;
}

/*
 *  SetFlags
 */

void Actor::set_type_flags(unsigned short tflags) {
	type_flags = tflags;
	if (get_type_flag(Actor::tf_bleeding)) {
		need_timers()->start_bleeding();
	}
	set_actor_shape();
}

/*
 *  Set temperature.
 */

void Actor::set_temperature(int v    // Should be 0-63.
) {
	if (v < 0) {
		v = 0;
	} else if (v > 63) {
		v = 63;
	}
	temperature = v;
}

/*
 *  Figure warmth based on what's worn.  In trying to mimic the original
 *  SI, the base value is -75.
 */

int Actor::figure_warmth() {
	int warmth = -75;    // Base value.

	static const Ready_type_Exult locs[]
			= {head, cloak, feet, torso, gloves, legs};
	for (auto loc : locs) {
		Game_object* worn = spots[loc];
		if (worn) {
			warmth += worn->get_info().get_object_warmth(worn->get_framenum());
		}
	}
	return warmth;
}

/*
 *  Get maximum weight in stones that can be held.
 *
 *  Output: Max. allowed, or 0 if no limit (i.e., not carried by an NPC).
 */

int Actor::get_max_weight() const {
	return 2 * get_effective_prop(static_cast<int>(Actor::strength));
}

/*
 *  Call usecode function for an object that's readied/unreadied.
 */

void Actor::call_readied_usecode(int index, Game_object* obj, int eventid) {
	ignore_unused_variable_warning(index);
	// Limit to certain types.
	if (!obj->get_info().has_usecode_events()) {
		return;
	}

	const Shape_info& info = obj->get_info();
	if (info.get_shape_class() != Shape_info::container) {
		ucmachine->call_usecode(
				obj->get_usecode(), obj,
				static_cast<Usecode_machine::Usecode_events>(eventid));
	}
}

/*
 *  Returns true if NPC is in a non-no_halt usecode script or if
 *  dont_move flag is set.
 */
bool Actor::in_usecode_control() const {
	if (get_flag(Obj_flags::dont_render) || get_flag(Obj_flags::dont_move)) {
		return true;
	}
	Usecode_script* scr = nullptr;
	while ((scr = Usecode_script::find_active(this, scr)) != nullptr) {
		// no_halt scripts seem not to prevent movement.
		if (!scr->is_no_halt()) {
			return true;
		}
	}
	return false;
}

/*
 *  Attack preset target/tile using preset weapon shape.
 *
 *  Output: True if attack was realized and hit target (or is
 *  a missile flying towards target), false otherwise
 */
bool Actor::usecode_attack() {
	const Game_object_shared tobj = target_object.lock();
	return Combat_schedule::attack_target(
			this, tobj.get(), target_tile, attack_weapon);
}

/*
 *  Should be called after actors and usecode are initialized.
 */

void Actor::init_readied() {
	for (size_t i = 0; i < spots.size(); i++) {
		if (spots[i]) {
			call_readied_usecode(i, spots[i], Usecode_machine::readied);
		}
	}
}

/*
 *  Remove an object.
 */

void Actor::remove(Game_object* obj) {
	const int index = Actor::find_readied(obj);    // Remove from spot.
	// Note:  gwin->drop() also does this,
	//   but it needs to be done before
	//   removal too.
	// Definitely DO NOT call if dead!
	if (!is_dead()
		&& !ucmachine->in_usecode_for(obj, Usecode_machine::unreadied)
		&& !(GAME_SI
			 && ucmachine->in_usecode_for(
					 gwin->get_main_actor(),
					 Usecode_machine::died))) {    // Fix for #1887 - Hang when
												   // leaving SI dream world
		call_readied_usecode(index, obj, Usecode_machine::unreadied);
	}
	Container_game_object::remove(obj);
	if (index >= 0) {
		spots[index] = nullptr;
		if (index == rhand || index == lhand) {
			two_handed = false;
		}
		if (index == rfinger || index == lfinger) {
			two_fingered = false;
		}
		if (index == belt || index == back_2h || index == back_shield) {
			use_scabbard = false;
		}
		if (index == amulet || index == cloak) {
			use_neck = false;
		}
		if (index == lhand && schedule) {
			schedule->set_weapon(true);
		}
		// Recheck armor immunities and frame powers.
		refigure_gear();
	}
}

/*
 *  Add an object.
 *
 *  Output: 1, meaning object is completely contained in this,
 *      0 if not enough space.
 */

bool Actor::add(
		Game_object* obj,
		bool         dont_check,    // 1 to skip volume check (AND also
		//   to skip usecode call).
		bool combine,    // True to try to combine obj.  MAY
		//   cause obj to be deleted.
		bool noset    // True to prevent actors from setting sched. weapon.
) {
	int index = find_best_spot(obj);    // Where should it go?

	if (index < 0) {    // No free spot?  Look for a bag.
		if (spots[backpack] && spots[backpack]->add(obj, false, combine)) {
			return true;
		}
		if (spots[belt] && spots[belt]->add(obj, false, combine)) {
			return true;
		}
		if (spots[lhand] && spots[lhand]->add(obj, false, combine)) {
			return true;
		}
		if (spots[rhand] && spots[rhand]->add(obj, false, combine)) {
			return true;
		}
		if (!dont_check) {
			return false;
		}

		// try again without checking volume/weight
		if (spots[backpack] && spots[backpack]->add(obj, true, combine)) {
			return true;
		}
		if (spots[belt] && spots[belt]->add(obj, true, combine)) {
			return true;
		}
		if (spots[lhand] && spots[lhand]->add(obj, true, combine)) {
			return true;
		}
		if (spots[rhand] && spots[rhand]->add(obj, true, combine)) {
			return true;
		}

		if (party_id != -1 || npc_num == 0) {
			CERR("Warning: adding object ("
				 << obj << ", sh. " << obj->get_shapenum() << ", "
				 << obj->get_name() << ") to actor container (npc " << npc_num
				 << ")");
		}
		return Container_game_object::add(obj, dont_check, combine);
	}
	// Add to ourself (DON'T combine).
	if (!Container_game_object::add(obj, true)) {
		return false;
	}

	if (index == both_hands) {    // Two-handed?
		two_handed = true;
		index      = lhand;
	} else if (index == lrgloves) {    // BG Gloves?
		two_fingered = true;
		index        = lfinger;
	} else if (index == scabbard) {    // Use scabbard?
		use_scabbard = true;
		index        = belt;
	} else if (index == neck) {    // Use neck?
		use_neck = true;
		index    = amulet;
	}

	spots[index] = obj;    // Store in correct spot.
	if (index == lhand && schedule && !noset) {
		schedule->set_weapon();    // Tell combat-schedule about it.
	}
	obj->set_shape_pos(0, 0);    // Clear coords. (set by gump).
	if (!dont_check) {
		call_readied_usecode(index, obj, Usecode_machine::readied);
	}
	// (Readied usecode now in drop().)

	const Shape_info& info = obj->get_info();

	if (info.is_light_source() && (index == lhand || index == rhand)) {
		add_light_source(info.get_object_light(obj->get_framenum()));
	}

	// Refigure granted immunities.
	gear_immunities |= info.get_armor_immunity();
	gear_powers |= info.get_object_flags(
			obj->get_framenum(), info.has_quality() ? obj->get_quality() : -1);
	return true;
}

/*
 *  Add to given spot.
 *
 *  Output: true if successful, else false.
 */

bool Actor::add_readied(
		Game_object* obj,
		int          index,    // Spot #.
		bool dont_check, bool force_pos, bool noset) {
	// Is Out of range?
	if (index < 0 || static_cast<unsigned>(index) >= spots.size()) {
		return false;
	}

	// Already something there? Try to drop into it.
	// +++++Danger:  drop() can potentially delete the object.
	//	if (spots[index]) return spots[index]->drop(obj);
	if (spots[index]) {
		return spots[index]->add(obj, dont_check);
	}

	int prefered;
	int alt1;
	int alt2;

	// Get the preferences
	get_prefered_slots(obj, prefered, alt1, alt2);

	// Check Prefered
	if (!fits_in_spot(obj, index) && !force_pos) {
		return false;
	}

	// No room, or too heavy.
	if (!Container_game_object::add(obj, true)) {
		return false;
	}

	// Set the spot to this object
	spots[index] = obj;

	// Clear coords. (set by gump).
	obj->set_shape_pos(0, 0);

	// Must be a two-handed weapon.
	if (prefered == both_hands && index == lhand) {
		two_handed = true;
	}
	// Must be gloves
	else if (prefered == lrgloves && index == lfinger) {
		two_fingered = true;
	}
	// Must be in scabbard
	else if ((alt1 == scabbard || alt2 == scabbard) && index == belt) {
		use_scabbard = true;
	}
	// Must use neck entirely
	else if (prefered == neck && index == amulet) {
		use_neck = true;
	}

	if (!dont_check) {
		call_readied_usecode(index, obj, Usecode_machine::readied);
	}

	const Shape_info& info = obj->get_info();

	if (info.is_light_source() && (index == lhand || index == rhand)) {
		add_light_source(info.get_object_light(obj->get_framenum()));
	}

	// Refigure granted immunities.
	gear_immunities |= info.get_armor_immunity();
	gear_powers |= info.get_object_flags(
			obj->get_framenum(), info.has_quality() ? obj->get_quality() : -1);

	if (index == lhand && schedule && !noset) {
		schedule->set_weapon();    // Tell combat-schedule about it.
	}
	return true;
}

/*
 *  Find index of spot where an object is readied.
 *
 *  Output: Index, or -1 if not found.
 */

int Actor::find_readied(Game_object* obj) {
	for (size_t i = 0; i < spots.size(); i++) {
		if (spots[i] == obj) {
			return i;
		}
	}
	return -1;
}

/*
 *  Get object readied at given slot index.
 *
 *  Output: Object pointer, or null if invalid slot ID given.
 */

Game_object* Actor::get_readied(int index) const {
	return index >= 0 && static_cast<unsigned>(index) < spots.size()
				   ? spots[index]
				   : nullptr;
}

/*
 *  Change shape of a member.
 */

void Actor::change_member_shape(Game_object* obj, int newshape) {
	Container_game_object::change_member_shape(obj, newshape);
	refigure_gear();
}

/*
 *  Step aside to a free tile, or try to swap places.
 *
 *  Output: true if successful, else false.
 */

bool Actor::move_aside(
		Actor* for_actor,    // Moving aside for this one.
		int    dir           // Direction to avoid (0-7).
) {
	// ++++ FIXME: Ugly workaround: preventing stepping aside in combat
	// also prevents some cases of double-moving aside that result in
	// walking through walls or doors.
	// Also, don't move if the other actor is moving, as this may break
	// pathfinding.
	if (get_schedule_type() == Schedule::combat || get_frame_time()) {
		return false;
	}
	// Do not move aside if sitting, bending over, kneeling or sleeping.
	const int frnum = get_framenum() & 0xf;
	if (frnum >= sit_frame && frnum <= sleep_frame) {
		return false;
	}

	const Tile_coord cur = get_tile();
	Tile_coord       to(-1, -1, -1);
	int              d = 8;
	// Try orthogonal directions first.
	to = cur.get_neighbor((dir + 2) % 8);
	if (!is_blocked(to, nullptr, get_type_flags())) {
		d = (dir + 2) % 8;
	} else {
		to = cur.get_neighbor((dir + 6) % 8);
		if (!is_blocked(to, nullptr, get_type_flags())) {
			d = (dir + 6) % 8;
		} else {
			for (int i = 0; i < 4; i++) {    // Try diagonals now.
				to = cur.get_neighbor(2 * i + 1);
				if (!is_blocked(to, nullptr, get_type_flags())) {
					d = 2 * i + 1;
					break;
				}
			}
		}
	}

	const int stepdir = d;        // This is the direction.
	if (d == 8 || to.tx < 0) {    // Failed?  Try to swap places.
		return swap_positions(for_actor);
	}
	// Step, and face direction.
	step(to, get_dir_framenum(stepdir, static_cast<int>(Actor::standing)));
	const Tile_coord newpos = get_tile();
	return newpos.tx == to.tx && newpos.ty == to.ty;
}

/*
 *  Get frame if rotated 1, 2, or 3 quadrants clockwise.
 */

int Actor::get_rotated_frame(int quads    // 1=90, 2=180, 3=270.
) const {
	const int curframe = get_framenum();
	// Bit 4=rotate180, 5=rotate-90.
	const int curdir
			= (4 + 2 * ((curframe >> 4) & 1) - ((curframe >> 5) & 1)) % 4;
	const int newdir = (curdir + quads) % 4;
	// Convert to 8-value dir & get frame.
	return get_dir_framenum(2 * newdir, curframe);
}

/*
 *  Get total value of armor being worn.
 */

int Actor::get_armor_points() const {
	int                           points = 0;
	static const Ready_type_Exult aspots[]
			= {head,    amulet,  torso, cloak, belt,     lhand, rhand,
			   lfinger, rfinger, legs,  feet,  earrings, gloves};
	for (auto aspot : aspots) {
		Game_object* armor = spots[aspot];
		if (armor) {
			points += armor->get_info().get_armor();
		}
	}
	return points;
}

/*
 *  Get whether or not the actor is immune or vulnerable to a form of damage.
 *
 *  Input is damage_type for a weapon.
 *
 *  Returns 1 if the actor is immune, -1 if vulnerable or 0 otherwise.
 */

int Actor::is_immune(int type) const {
	if (gear_immunities & (1 << type)) {
		return 1;
	}
	const Monster_info* minf = get_info().get_monster_info();
	if (minf && minf->get_immune() & (1 << type)) {
		return 1;
	}
	if (minf && minf->get_vulnerable() & (1 << type)) {
		return -1;
	} else {
		return 0;
	}
}

bool Actor::is_goblin() const {
	return get_info().is_goblin();
}

bool Actor::can_see_invisible() const {
	const Monster_info* minf = get_info().get_monster_info_safe();
	return (minf->get_flags() & (1 << Monster_info::see_invisible)) != 0;
}

bool Actor::can_speak() const {
	const Monster_info* minf = get_info().get_monster_info();
	// TODO: Check for SI monks that don't speak (vows of silence, deafness).
	return !minf || !minf->cant_yell();
}

bool Actor::is_sentient() const {
	// Try based on average monster intelligence (prevents some random animals
	// from opening doors or assisting in battle).
	const Monster_info* minf = get_info().get_monster_info_safe();
	return minf->get_intelligence() >= 6;
}

/*
 *  Get weapon value.
 */

const Weapon_info* Actor::get_weapon(
		int& points, int& shape,
		Game_object*& obj    // ->weapon itself returned, or nullptr.
) const {
	points                    = 1;     // Bare hands = 1.
	shape                     = -1;    // Bare hands.
	const Weapon_info* winf   = nullptr;
	Game_object*       weapon = spots[lhand];
	obj                       = weapon;
	if (weapon) {
		if ((winf = weapon->get_info().get_weapon_info()) != nullptr) {
			points = winf->get_damage();
			shape  = weapon->get_shapenum();
			return winf;
		}
	}
	return winf;
}

/*
 *  Roll a 25-sided die to determine a win-lose outcome, adding a
 *  bias for the attacker and for the defender.
 */

bool Actor::roll_to_win(
		int attacker,    // Points added.
		int defender     // Points subtracted.
) {
	const int sides = 30;
	const int roll  = rand() % sides;
	if (roll == 0) {    // Always lose.
		return false;
	} else if (roll == sides - 1) {    // High?  Always win.
		return true;
	} else {
		return roll + attacker - defender >= sides / 2 - 1;
	}
}

/*
 *  Get effective property, or default value.
 */

inline int Get_effective_prop(
		Actor*                 npc,          // ...or nullptr.
		Actor::Item_properties prop,         // Property #.
		int                    defval = 0    // Default val if npc==0.
) {
	return npc ? npc->get_effective_prop(prop) : defval;
}

/*
 *  Figure hit points lost from an attack, and subtract from total.
 *
 *  Output: Hits taken or < 0 for explosion.
 */

int Actor::figure_hit_points(
		Game_object* attacker,
		int          weapon_shape,    // < 0 for readied weapon.
		int          ammo_shape,      // < 0 for no ammo shape.
		bool         explosion        // If this is an explosion attacking.
) {
	const bool were_party = party_id != -1 || npc_num == 0;
	// godmode effects:
	if (were_party && cheat.in_god_mode()) {
		return 0;
	}
	Actor*     npc          = attacker ? attacker->as_actor() : nullptr;
	const bool theyre_party = npc && (npc->party_id != -1 || npc->npc_num == 0);
	const bool instant_death = (cheat.in_god_mode() && theyre_party);
	// Modify using combat difficulty.
	const int bias = were_party ? Combat::difficulty
								: (theyre_party ? -Combat::difficulty : 0);

	const Weapon_info* winf;
	const Ammo_info*   ainf;

	int wpoints = 0;
	if (weapon_shape >= 0) {
		winf = ShapeID::get_info(weapon_shape).get_weapon_info();
	} else {
		winf = nullptr;
	}
	if (ammo_shape >= 0) {
		ainf = ShapeID::get_info(ammo_shape).get_ammo_info();
	} else {
		ainf = nullptr;
	}
	if (!winf && weapon_shape < 0) {
		winf = npc ? npc->get_weapon(wpoints) : nullptr;
	}

	int  usefun   = -1;
	int  powers   = 0;
	int  type     = Weapon_data::normal_damage;
	bool explodes = false;

	if (winf) {
		wpoints  = winf->get_damage();
		usefun   = winf->get_usecode();
		type     = winf->get_damage_type();
		powers   = winf->get_powers();
		explodes = winf->explodes();
	} else {
		wpoints = 1;    // Give at least one, but only if there's no weapon
	}
	if (ainf) {
		wpoints += ainf->get_damage();
		// Replace damage type.
		if (ainf->get_damage_type() != Weapon_data::normal_damage) {
			type = ainf->get_damage_type();
		}
		powers |= ainf->get_powers();
		explodes = explodes || ainf->explodes();
	}

	if (explodes && !explosion) {    // Explosions shouldn't explode again.
									 // Time to explode.
		const Tile_coord offset(0, 0, get_info().get_3d_height() / 2);
		eman->add_effect(std::make_unique<Explosion_effect>(
				get_tile() + offset, nullptr, 0, weapon_shape, ammo_shape,
				attacker));
		// The explosion will handle the damage.
		return -1;
	}

	int        expval   = 0;
	int        hits     = 0;
	const bool nodamage = (powers & (Weapon_data::no_damage)) != 0;
	if (wpoints && instant_death) {
		wpoints = 127;
	}
	if (wpoints && !nodamage) {
		// This may kill the NPC; this comes before powers because no
		// damage means no powers -- except for the no_damage flag.
		hits = apply_damage(
				attacker, Get_effective_prop(npc, Actor::strength, 0), wpoints,
				type, bias, &expval);
	}
	// Apply weapon powers if needed.
	// wpoints == 0 ==> some spells that don't hurt (but need to apply powers).
	const bool powers_only = !wpoints || nodamage;
	if (powers && (hits || powers_only)) {
		// Protection prevents powers.
		if (!get_flag(Obj_flags::protection)) {
			const int attint
					= powers_only
							  ? Get_effective_prop(npc, Actor::intelligence, 16)
							  : 16;
			const int defstr = Get_effective_prop(this, Actor::strength);
			const int defint = Get_effective_prop(this, Actor::intelligence);

			// These rolls are bourne from statistical analisys and are,
			// as far as I can tell, how the game works.
			if ((powers & Weapon_data::poison) && roll_to_win(attint, defstr)) {
				set_flag(Obj_flags::poisoned);
			}
			if ((powers & Weapon_data::curse) && roll_to_win(attint, defint)) {
				set_flag(Obj_flags::cursed);
			}
			if ((powers & Weapon_data::charm) && roll_to_win(attint, defint)) {
				set_flag(Obj_flags::charmed);
				if (npc) {
					charmalign = npc->get_effective_alignment();
				} else {
					charmalign = chaotic;    // Verified.
				}
				set_charmed_combat();
			}
			if ((powers & Weapon_data::sleep) && roll_to_win(attint, defint)) {
				set_flag(Obj_flags::asleep);
			}
			if ((powers & Weapon_data::paralyze)
				&& roll_to_win(attint, defstr)) {
				set_flag(Obj_flags::paralyzed);
			}
			if (powers & Weapon_data::magebane) {
				// Magebane weapons (magebane sword, death scythe).
				// Take away all mana.
				set_property(static_cast<int>(Actor::mana), 0);
				int                num_spells = 0;
				Game_object_vector spells;
				spells.reserve(50);
				{
					Game_object_vector vec;
					vec.reserve(50);
					get_objects(
							vec, c_any_shapenum, c_any_qual, c_any_framenum);
					// Gather all spells...
					for (auto* obj : vec) {
						if (obj->get_info().is_spell()) {
							// Seems to be right.
							spells.push_back(obj);
						}
					}
				}
				// ... and take them all away.
				while (!spells.empty()) {
					++num_spells;
					Game_object* obj = spells.back();
					spells.pop_back();
					obj->remove_this();
				}
				if (num_spells) {
					// Display magebane struck string and set
					// no_spell_casting flag. This is only done
					// to prevent monsters from teleporting or
					// doing other such things.
					set_flag(Obj_flags::no_spell_casting);
					if (can_speak()) {
						eman->remove_text_effect(this);
						say(first_magebane_struck, last_magebane_struck);
					}
					// Tell schedule we need a new weapon.
					if (schedule && spots[lhand] == nullptr) {
						schedule->set_weapon();
					}
				}
			}
		}
		if (nodamage && ammo_shape == 568) {
			// This is *only* done for SI sleep arrows, and all other
			// powers have had their effect by now (as can be verified
			// by using the called usecode function).
			if (npc) {    // Just to be sure.
				set_oppressor(npc->get_npc_num());
			}
			// Allowing for BG too, as it doesn't have a function 0x7e1.
			ucmachine->call_usecode(
					SleepArrowsUsecode, this, Usecode_machine::weapon);
		}
	}

	if (expval > 0 && npc) {    // Give experience.
		npc->set_property(
				static_cast<int>(exp),
				npc->get_property(static_cast<int>(exp)) + expval);
	}

	// Weapon usecode comes last of all.
	if (usefun > 0) {
		if (npc) {    // Just to be sure.
			set_oppressor(npc->get_npc_num());
		}
		ucmachine->call_usecode(usefun, this, Usecode_machine::weapon);
	}
	return hits;
}

/*
 *  Trying to hit NPC with an attack.
 *
 *  Output: true if attack hit, false otherwise.
 */

bool Actor::try_to_hit(Game_object* attacker, int attval) {
	const int defval = get_effective_prop(static_cast<int>(combat))
					   + (get_flag(Obj_flags::protection) ? 3 : 0);
	if (combat_trace) {
		string name = "<trap>";
		if (attacker) {
			name = attacker->get_name();
		}
		int prob = 30 - (15 + defval - attval) + 1;
		if (prob >= 30) {
			prob = 29;    // 1 always misses.
		} else if (prob <= 1) {
			prob = 1;    // 30 always hits.
		}
		prob *= 100;
		cout << name << " is attacking " << get_name()
			 << " with hit probability " << static_cast<float>(prob) / 30 << "%"
			 << endl;
	}

	return Actor::roll_to_win(attval, defval);
}

/*
 *  Being attacked.
 *
 *  Output: 0 if defeated, else object itself.
 */

Game_object* Actor::attacked(
		Game_object* attacker,
		int          weapon_shape,    // < 0 for readied weapon.
		int          ammo_shape,      // < 0 for no ammo shape.
		bool         explosion        // If this is an explosion attacking.
) {
	if (is_dead() ||    // Already dead?
						// Or party member of dead Avatar?
		(party_id >= 0 && gwin->get_main_actor()->is_dead())) {
		return nullptr;
	}
	Actor* npc = attacker ? attacker->as_actor() : nullptr;
	if (npc) {
		set_oppressor(npc->get_npc_num());
	}
	if (npc && npc->get_schedule_type() == Schedule::duel) {
		return this;    // Just play-fighting.
	}

	const int oldhp = properties[static_cast<int>(health)];
	const int delta
			= figure_hit_points(attacker, weapon_shape, ammo_shape, explosion);

	if (Combat::show_hits && !is_dead() && delta >= 0) {
		eman->remove_text_effect(this);
		char hpmsg[50];
		snprintf(hpmsg, sizeof(hpmsg), "-%d(%d)", delta, oldhp - delta);
		eman->add_text(hpmsg, this);
	}
	if (combat_trace) {
		string name = "<trap>";
		if (attacker) {
			name = attacker->get_name();
		}
		cout << name << " hits " << get_name();
		if (delta > 0) {
			cout << " for " << delta << " hit points; ";
			if (oldhp > 0 && oldhp < delta) {
				cout << get_name() << " is defeated." << endl;
			} else {
				cout << oldhp - delta << " hit points are left." << endl;
			}
		} else if (!delta) {
			cout << " to no damage." << endl;
		} else {
			cout << " causing an explosion." << endl;
		}
	}

	if (attacker && (is_dead() || properties[static_cast<int>(health)] < 0)) {
		return nullptr;
	}
	return this;
}

/*
 *  There's probably a smarter way to do this, but this routine checks
 *  for the dragon Draco.
 */

static bool Is_draco(Actor* dragon) {
	Game_object_vector vec;    // Gets list.
	// Should have a special scroll.
	const int cnt = dragon->get_objects(vec, 797, 241, 4);
	return cnt > 0;
}

/*
 *  We're dead.  We're removed from the world, but not deleted.
 */

void Actor::die(Game_object* attacker) {
	// If the actor is already dead, we shouldn't do anything
	//(fixes a resurrection bug).
	if (is_dead()) {
		return;
	}
	set_action(nullptr);
	schedule.reset();
	gwin->get_tqueue()->remove(this);    // Remove from time queue.
	Actor::set_flag(Obj_flags::dead);    // IMPORTANT:  Set this before moving
	clear_type_flag(Actor::tf_bleeding);
	//   objs. so Usecode(eventid=6) isn't called.
	int shnum = get_shapenum();
	// Special case:  Hook, Dracothraxus.
	if (((shnum == 0x1fa || (shnum == 0x1f8 && Is_draco(this)))
		 && Game::get_game_type() == BLACK_GATE)) {
		// Exec. usecode before dying.
		ucmachine->call_usecode(
				ucmachine->get_shape_fun(shnum), this,
				Usecode_machine::internal_exec);
		if (is_pos_invalid()) {    // Invalid now?
			return;
		}
	}
	// Get location.
	const Tile_coord pos = get_tile();
	// properties[static_cast<int>(health)] = -50;
	// before creating the body, make sure polymorphed NPCs revert to their shape
	if (get_flag(Obj_flags::polymorph)) {
		clear_flag(Obj_flags::polymorph);
		if (shape_save != -1) {
			set_shape(shape_save);
			shape_save = -1;
		}
	}
	const Shape_info&   info       = get_info();
	const Monster_info* minfo      = info.get_monster_info();
	const bool          frost_serp = GAME_SI && get_shapenum() == 832;
	if ((frost_serp && (get_framenum() & 0xf) == Actor::sit_frame)
		|| (get_framenum() & 0xf) == Actor::sleep_frame) {
		auto* scr = new Usecode_script(this);
		(*scr) << Ucscript::delay_ticks << 4 << Ucscript::remove;
		scr->start();
	} else {    // Laying down to die.
		lay_down(true);
	}

	std::shared_ptr<Dead_body> body_keep;
	Dead_body*                 body;    // See if we need a body.
	if (info.has_body_info() && (!minfo || !minfo->has_no_body())) {
		// Get body shape/frame.
		shnum     = info.get_body_shape();    // Default 400.
		int frnum = info.get_body_frame();    // Default 3.
		// Reflect if NPC reflected.
		frnum |= (get_framenum() & 32);
		body_keep = std::make_shared<Dead_body>(
				shnum, frnum, 0, 0, 0, npc_num > 0 ? npc_num : -1);
		body = body_keep.get();
		Shape_frame* shp;
		const bool   have_body_shape
				= (shp = body->get_shape()) != nullptr && shp->is_empty();
		if (have_body_shape) {
			// Note: only do this if target shape is an actual
			// body shape (frame 0 empty).
			auto* scr = new Usecode_script(body);
			(*scr) << Ucscript::delay_ticks << 4 << Ucscript::frame << frnum;
			scr->start();
		}
		if (npc_num > 0) {
			// Originals would use body->set_quality(2) instead
			// for bodies of dead monsters. What we must do for
			// backwards compatibility...
			body->set_quality(1);    // Flag for dead body of NPC.
			gwin->set_body(npc_num, body);
		}
		// Tmp. monster => tmp. body.
		if (get_flag(Obj_flags::is_temporary)) {
			body->set_flag(Obj_flags::is_temporary);
		}
		// Remove NPC from map to prevent the body
		// from colliding with it.
		Game_object_shared keep_this;
		Game_object::remove_this(&keep_this);
		const Shape_info& binf = body->get_info();
		const int         dx   = binf.get_3d_xtiles(frnum)
					   - info.get_3d_xtiles(get_framenum());
		const int dy = binf.get_3d_ytiles(frnum)
					   - info.get_3d_ytiles(get_framenum());
		Tile_coord bp;
		// First, try matching corners of the NPC with corners of the body.
		bp = Map_chunk::find_spot(
				pos + Tile_coord(0, 0, 0), 0, shnum, frnum, 0);
		if (bp.tx == -1) {
			bp = Map_chunk::find_spot(
					pos + Tile_coord(dx, 0, 0), 0, shnum, frnum, 0);
		}
		if (bp.tx == -1) {
			bp = Map_chunk::find_spot(
					pos + Tile_coord(0, dy, 0), 0, shnum, frnum, 0);
		}
		if (bp.tx == -1) {
			bp = Map_chunk::find_spot(
					pos + Tile_coord(dx, dy, 0), 0, shnum, frnum, 0);
		}
		// If still no spot, force to NPC pos, even if blocked.
		if (bp.tx == -1) {
			bp = pos;
		}
		// Add NPC back.
		Game_object::move(pos);
		body->move(bp);
		if (have_body_shape) {
			body->change_frame(0);    // Make body invisible
		}
	} else {
		body = nullptr;
	}

	Game_object_shared_vector tooheavy;    // Some shouldn't be moved.
	{
		Game_object* item;    // Move/remove all the items.
		while ((item = objects.get_first()) != nullptr) {
			const Game_object_shared item_keep = shared_from_obj(item);
			remove(item);
			if (item->get_info().is_spell()) {
				// Note: this misses spells in containers. This is fixed below.
				tooheavy.push_back(item_keep);
				continue;
			}
			if (body) {
				item->set_shape_pos(255, 255);    // So it gets placed.
				body->add(item, true);            // Always succeed at adding.
			} else {                              // No body?  Drop on ground.
				item->set_flag_recursively(Obj_flags::okay_to_take);
				const Tile_coord pos2 = Map_chunk::find_spot(
						pos, 5, item->get_shapenum(), item->get_framenum(), 1);
				if (pos.tx != -1) {
					item->move(pos2);
				} else {    // No room anywhere.
					tooheavy.push_back(item_keep);
				}
			}
		}
	}
	if (body) {    // Okay to take its contents.
		Game_object_vector vec;
		vec.reserve(50);
		body->get_objects(vec, c_any_shapenum, c_any_qual, c_any_framenum);
		// Gather all spells recursively and move them back to the NPC.
		for (auto* obj : vec) {
			Container_game_object* cont = obj->get_owner();
			if (cont != nullptr && obj->get_info().is_spell()) {
				tooheavy.push_back(obj->shared_from_this());
				obj->get_owner()->remove(obj);
			}
		}
		body->set_flag_recursively(Obj_flags::okay_to_take);
	}

	// Put the heavy ones back.
	for (auto& it : tooheavy) {
		add(it.get(), true);
	}
	if (body) {
		gwin->add_dirty(body);
	}
	add_dirty();          // Want to repaint area.
	delete_contents();    // remove what's left of inventory
	Actor* npc = attacker ? attacker->as_actor() : nullptr;
	if (npc) {
		// Set oppressor and cause nearby NPCs to attack attacker.
		fight_back(attacker);
		set_target(nullptr, false);
		set_schedule_type(Schedule::wander);

		// Is this a bad guy?
		// Party defeated an evil monster?
		if (npc->is_in_party() && !is_in_party() && alignment >= evil) {
			Combat_schedule::monster_died();
		}
	}
	// TODO: De-hard-code this.
	if (GAME_BG && is_in_party() && !Audio::get_ptr()->is_voice_playing()
		&& (rand() % 4) == 0) {
		ucmachine->do_speech(22);
	}
	// Move party member to 'dead' list.
	partyman->update_party_status(this);
}

/*
 *  Create another monster of the same type as this, and adjacent.
 *
 *  Output: ->monster, or nullptr if failed.
 */

Game_object_shared Actor::clone() {
	const Shape_info& info = get_info();
	// Base distance on greater dim.
	const int frame = get_framenum();
	const int xs    = info.get_3d_xtiles(frame);
	const int ys    = info.get_3d_ytiles(frame);
	// Find spot.
	const Tile_coord pos = Map_chunk::find_spot(
			get_tile(), xs > ys ? xs : ys, get_shapenum(), 0, 1);
	if (pos.tx < 0) {
		return nullptr;    // Failed.
	}
	// Create, temporary & with equip.
	Game_object_shared monst = Monster_actor::create(
			get_shapenum(), pos, get_schedule_type(), get_effective_alignment(),
			true, true);
	return monst;
}

/*
 *  Restore HP's on the hour.
 */

void Actor::mend_wounds(bool mendmana) {
	int hp = properties[static_cast<int>(health)];
	clear_type_flag(Actor::tf_bleeding);    // Stop bleeding.
	const bool starving
			= (get_property(static_cast<int>(food_level)) <= 9 && is_in_party()
			   && !get_info().does_not_eat());
	// It should be okay to leave is_cold_immune out.
	// It blocks raising temperature in the first place.
	const bool freezing
			= (is_in_party() && temperature >= 50
			   && !(gear_powers & Frame_flags::cold_immune));
	if (is_dead() || get_flag(Obj_flags::poisoned) || (starving && hp > 0)
		|| freezing) {
		return;
	}
	const int maxhp = properties[static_cast<int>(strength)];
	if (maxhp > 0 && hp < maxhp) {
		// first case doesn't seem to be used in the original - will keep for
		// npcs
		if (maxhp >= 3 && !starving && get_schedule_type() == Schedule::sleep) {
			hp += 1 + rand() % (maxhp / 3);
		} else {
			hp += 1;
		}
		if (hp > maxhp) {
			hp = maxhp;
		}
		properties[static_cast<int>(health)] = hp;
	}
	clear_type_flag(Actor::tf_bleeding);
	if (!mendmana) {
		return;
	}
	// Restore some mana also.
	const int maxmana = properties[static_cast<int>(magic)];
	int       curmana = properties[static_cast<int>(mana)];
	clear_flag(Obj_flags::no_spell_casting);

	if (maxmana > 0 && curmana < maxmana) {
		if (maxmana >= 3) {
			curmana += 1 + rand() % (maxmana / 3);
		} else {
			curmana += 1;
		}
		properties[static_cast<int>(mana)]
				= curmana <= maxmana ? curmana : maxmana;
	}
}

/*
 *  Restore from body.  It must not be owned by anyone.
 *
 *  Output: ->actor if successful, else nullptr.
 */

Actor* Actor::resurrect(Dead_body* body    // Must be this actor's body.
) {
	Tile_coord pos;
	if (body) {
		if (body->get_owner() ||    // Must be on ground.
			npc_num <= 0 || gwin->get_body(npc_num) != body) {
			return nullptr;
		}
		gwin->set_body(npc_num, nullptr);    // Clear from gwin's list.
		Game_object* item;                   // Get back all the items.
		while ((item = body->get_objects().get_first()) != nullptr) {
			const Game_object_shared keep = item->shared_from_this();
			body->remove(item);
			add(item, true);    // Always succeed at adding.
		}
		gwin->add_dirty(body);    // Need to repaint here.
		pos = body->get_tile();
		body->remove_this();    // Remove and delete body.
	} else {
		pos = Tile_coord(-1, -1, 0);
	}
	move(pos);    // Move back to life.
	// Restore health to max.
	properties[static_cast<int>(health)]
			= properties[static_cast<int>(strength)];
	Actor::clear_flag(Obj_flags::dead);
	Actor::clear_flag(Obj_flags::poisoned);
	Actor::clear_flag(Obj_flags::paralyzed);
	Actor::clear_flag(Obj_flags::asleep);
	Actor::clear_flag(Obj_flags::protection);
	Actor::clear_flag(Obj_flags::cursed);
	Actor::clear_flag(Obj_flags::charmed);
	Actor::clear_type_flag(Actor::tf_bleeding);
	// Restore to party if possible.
	partyman->update_party_status(this);
	// Give a reasonable schedule.
	set_schedule_type(
			is_in_party() ? Schedule::follow_avatar : Schedule::loiter);
	// Stand up.
	if (!body) {
		return this;
	}
	auto* scr = new Usecode_script(this);
	(*scr) << Ucscript::npc_sleep_frame << Ucscript::npc_kneel_frame
		   << Ucscript::npc_standing_frame;
	scr->start(1);
	return this;
}

/*
 *  Check to see if an actor taking a step is really blocked.
 */

bool Actor::is_really_blocked(Tile_coord& t, bool force) {
	if (abs(t.tz - get_tile().tz) > 1) {
		return true;
	}
	Game_object* block = find_blocking(t, get_direction(t));
	if (!block) {
		return true;    // IE, water.
	}
	if (block == this) {
		return false;
	}
	// Try to get blocker to move aside.
	if (block->move_aside(this, get_direction(block))) {
		return false;
	}
	// (May have swapped places.)  If okay, try one last time.
	return t != get_tile() && is_blocked(t, nullptr, force ? MOVE_ALL : 0);
}

/*
 *  Handle a time event (for animation).
 */

void Main_actor::handle_event(
		unsigned long curtime,    // Current time of day.
		uintptr       udata       // Ignored.
) {
	purge_deleted_actions();
	if (action) {    // Doing anything?
		// Do what we should.
		const int speed = action->get_speed();
		int       delay = action->handle_event(this);
		if (!delay) {
			// Action finished.
			// This makes for a smoother scrolling and prevents the
			// avatar from skipping a step when walking.
			frame_time = speed;
			if (!frame_time) {    // Not a path. Add a delay anyway.
				frame_time = gwin->get_std_delay();
			}
			delay = frame_time;
			set_action(nullptr);
		}

		gwin->get_tqueue()->add(curtime + delay, this, udata);
	} else if (in_usecode_control() || get_flag(Obj_flags::paralyzed)) {
		frame_time = 0;
		// Keep trying if we are in usecode control.
		gwin->get_tqueue()->add(curtime + gwin->get_std_delay(), this, udata);
	} else if (schedule) {
		frame_time = 0;
		schedule->now_what();
	}
}

/*
 *  Get the party to follow.
 */

void Main_actor::get_followers() const {
	const int cnt = partyman->get_count();
	for (int i = 0; i < cnt; i++) {
		Actor* npc = gwin->get_npc(partyman->get_member(i));
		if (!npc || npc->get_flag(Obj_flags::asleep) || npc->is_dead()) {
			continue;
		}
		const int sched = npc->get_schedule_type();
		// Skip if in combat or set to 'wait'.
		if (sched != Schedule::combat && sched != Schedule::wait &&
			// Loiter added for SI.
			sched != Schedule::loiter) {
			if (sched != Schedule::follow_avatar) {
				npc->set_schedule_type(Schedule::follow_avatar);
			} else {
				npc->follow(this);
			}
		}
	}
}

/*
 *  Step onto an adjacent tile.
 *
 *  Output: false if blocked.
 */

bool Main_actor::step(
		Tile_coord t,        // Tile to step onto.
		int        frame,    // New frame #.
		bool       force) {
	rest_time = 0;    // Reset counter.
	t.fixme();
	// Get chunk.
	const int cx = t.tx / c_tiles_per_chunk;
	const int cy = t.ty / c_tiles_per_chunk;
	// Get rel. tile coords.
	const int  tx    = t.tx % c_tiles_per_chunk;
	const int  ty    = t.ty % c_tiles_per_chunk;
	Map_chunk* nlist = gmap->get_chunk(cx, cy);
	bool       water;
	bool       poison;    // Get tile info.
	get_tile_info(this, gwin, nlist, tx, ty, water, poison);
	if (is_blocked(t, nullptr, force ? MOVE_ALL : 0)) {
		if (is_really_blocked(t, force)) {
			if (schedule) {    // Tell scheduler.
				schedule->set_blocked(t);
			}
			stop();
			return false;
		}
	}
	if (poison && t.tz == 0) {
		Actor::set_flag(static_cast<int>(Obj_flags::poisoned));
	}
	// Check for scrolling.
	gwin->scroll_if_needed(this, t);
	add_dirty();    // Set to update old location.
	// Get old chunk, old tile.
	Map_chunk*       olist   = get_chunk();
	const Tile_coord oldtile = get_tile();
	// Unhatch any nearby eggs in old location
	olist->unhatch_eggs(this, t.tx, t.ty, t.tz, oldtile.tx, oldtile.ty);

	// Move it.
	Actor::movef(olist, nlist, tx, ty, frame, t.tz);
	add_dirty(true);    // Set to update new.
	// In a new chunk?
	if (olist != nlist) {
		Main_actor::switched_chunks(olist, nlist);
	}
	const int roof_height = nlist->is_roof(tx, ty, t.tz);
	gwin->set_ice_dungeon(nlist->is_ice_dungeon(tx, ty));
	if (gwin->set_above_main_actor(roof_height)) {
		gwin->set_in_dungeon(
				nlist->has_dungeon() ? nlist->is_dungeon(tx, ty) : 0);
		gwin->set_all_dirty();
	} else if (
			roof_height < 31
			&& gwin->set_in_dungeon(
					nlist->has_dungeon() ? nlist->is_dungeon(tx, ty) : 0)) {
		gwin->set_all_dirty();
	}
	// Near an egg?  (Do this last, since
	//   it may teleport.)
	nlist->activate_eggs(this, t.tx, t.ty, t.tz, oldtile.tx, oldtile.ty);
	quake_on_walk();
	return true;
}

/*
 *  Setup cache after a change in chunks.
 */

void Main_actor::switched_chunks(
		Map_chunk* olist,    // Old chunk, or null.
		Map_chunk* nlist     // New chunk.
) {
	const int newcx = nlist->get_cx();
	const int newcy = nlist->get_cy();
	int       xfrom;
	int       xto;
	int       yfrom;
	int       yto;    // Get range of chunks.
	if (!olist ||     // No old, or new map?  Use all 9.
		olist->get_map() != nlist->get_map()) {
		xfrom = newcx > 0 ? newcx - 1 : newcx;
		xto   = newcx < c_num_chunks - 1 ? newcx + 1 : newcx;
		yfrom = newcy > 0 ? newcy - 1 : newcy;
		yto   = newcy < c_num_chunks - 1 ? newcy + 1 : newcy;
	} else {
		const int oldcx = olist->get_cx();
		const int oldcy = olist->get_cy();
		if (newcx == oldcx + 1) {
			xfrom = newcx;
			xto   = newcx < c_num_chunks - 1 ? newcx + 1 : newcx;
		} else if (newcx == oldcx - 1) {
			xfrom = newcx > 0 ? newcx - 1 : newcx;
			xto   = newcx;
		} else {
			xfrom = newcx > 0 ? newcx - 1 : newcx;
			xto   = newcx < c_num_chunks - 1 ? newcx + 1 : newcx;
		}
		if (newcy == oldcy + 1) {
			yfrom = newcy;
			yto   = newcy < c_num_chunks - 1 ? newcy + 1 : newcy;
		} else if (newcy == oldcy - 1) {
			yfrom = newcy > 0 ? newcy - 1 : newcy;
			yto   = newcy;
		} else {
			yfrom = newcy > 0 ? newcy - 1 : newcy;
			yto   = newcy < c_num_chunks - 1 ? newcy + 1 : newcy;
		}
	}
	for (int y = yfrom; y <= yto; y++) {
		for (int x = xfrom; x <= xto; x++) {
			nlist->get_map()
					->get_chunk(FIX_COORD(x), FIX_COORD(y))
					->setup_cache();
		}
	}

	// If change in Superchunk number, apply Old Style caching emulation
	gwin->emulate_cache(olist, nlist);
}

/*
 *  Move (teleport) to a new spot.
 */

void Main_actor::move(int newtx, int newty, int newlift, int newmap) {
	// Store old chunk list.
	Map_chunk* olist = get_chunk();
	// Move it.
	Actor::move(newtx, newty, newlift, newmap);
	Map_chunk* nlist = get_chunk();
	if (nlist != olist) {
		Main_actor::switched_chunks(olist, nlist);
	}
	const int tx = get_tx();
	const int ty = get_ty();
	gwin->set_ice_dungeon(nlist->is_ice_dungeon(tx, ty));
	if (gwin->set_above_main_actor(nlist->is_roof(tx, ty, newlift))) {
		gwin->set_in_dungeon(
				nlist->has_dungeon() ? nlist->is_dungeon(tx, ty) : 0);
	}
}

/*
 *  We're dead.
 */

void Main_actor::die(Game_object* /* attacker */
) {
	if (gwin->in_combat()) {
		gwin->toggle_combat();    // Hope this is safe....
	}
	Actor::set_flag(Obj_flags::dead);
	clear_type_flag(Actor::tf_bleeding);
	Actor*    party[9];
	const int cnt = gwin->get_party(party, 1);
	for (int i = 0; i < cnt; i++) {
		party[i]->clear_type_flag(Actor::tf_bleeding);
	}
	gumpman->close_all_gumps();    // Obviously.
	// Special function for dying:
	Usecode_function_data* info = Shapeinfo_lookup::GetAvUsecode(0);
	ucmachine->call_usecode(
			info->fun_id, this,
			static_cast<Usecode_machine::Usecode_events>(info->event_id));
}

/*
 *  Set the shapenum based on skin color, sex, naked flag and petra and
 * polymorph flag
 */
void Actor::set_actor_shape() {
	if (get_npc_num() != 0 || get_skin_color() < 0
		|| (get_flag(Obj_flags::polymorph) && !get_flag(Obj_flags::naked))) {
		return;
	}

	int        sn;
	const int  female = get_type_flag(tf_sex) ? 1 : 0;
	Skin_data* skin   = Shapeinfo_lookup::GetSkinInfoSafe(this);

	if (!skin ||    // Should never happen, but hey...
		(!sman->have_si_shapes()
		 && Shapeinfo_lookup::IsSkinImported(
				 get_flag(Obj_flags::naked) ? skin->naked_shape
											: skin->shape_num))) {
		sn = Shapeinfo_lookup::GetBaseAvInfo(female != 0)->shape_num;
	} else {
		sn = get_flag(Obj_flags::naked) ? skin->naked_shape : skin->shape_num;
	}

#ifdef DEBUG
	cerr << "Setting Shape to " << sn << endl;
#endif
	set_shape(sn, get_framenum());
	set_file(SF_SHAPES_VGA);
}

// Sets the polymorph to shape
void Actor::set_polymorph(int shape) {
#ifdef DEBUG
	cerr << "Setting polymorph for " << get_npc_num() << endl;
	cerr << "Shape " << shape << endl;
	cerr << "Save shape " << shape_save << endl;
#endif

	// Want to set to Avatar
	if (shape == Shapeinfo_lookup::GetMaleAvShape()
		|| shape == Shapeinfo_lookup::GetFemaleAvShape()) {
		Actor* avatar = gwin->get_main_actor();
		if (!avatar) {
			return;
		}

		Skin_data* skin = Shapeinfo_lookup::GetSkinInfoSafe(avatar);
		shape           = avatar->get_flag(Obj_flags::naked) ? skin->naked_shape
															 : skin->shape_num;
		if (this == avatar) {
			shape_save = shape;    // Revert to default un-polymorphed shape.
		}
	}
	set_file(SF_SHAPES_VGA);

	if (shape == shape_save) {
		set_shape(shape_save);
		shape_save = -1;
		clear_flag(Obj_flags::polymorph);
		return;
	}
	if (shape_save == -1) {
		shape_save = get_shapenum();
	}
	//	set_shape (shape, get_framenum());
	// ++++Taking a guess for SI amulet:
	set_shape(shape, get_dir_framenum(Actor::standing));
	set_flag(Obj_flags::polymorph);
}

// Sets polymorph shape to defaults based on flags and npc num
void Actor::set_polymorph_default() {
	if (!get_flag(Obj_flags::polymorph)
		|| (get_npc_num() != 0 && (GAME_SI && get_npc_num() != 28))) {
		return;
	}

	set_actor_shape();

	shape_save = get_shapenum();

	if (get_npc_num() == 28) {    // Handle Petra First
		set_polymorph(Shapeinfo_lookup::GetMaleAvShape());
	} else if (get_flag(Obj_flags::petra)) {    // Avatar as petra
		set_polymorph(658);
	} else {    // Snake
		set_polymorph(530);
	}
}

/*
 *  Get 'real' shape for Usecode.
 */

int Actor::get_shape_real() const {
	if (npc_num != 0) {    // Not the avatar?
		return shape_save != -1 ? shape_save : get_shapenum();
	}
	// Taking guess (6/18/01):
	if (get_type_flag(Actor::tf_sex)) {
		return Shapeinfo_lookup::GetFemaleAvShape();
	} else {
		return Shapeinfo_lookup::GetMaleAvShape();
	}
}

/**
 *  Causes earthquake on step if the actor flag is set.
 *  @return: True if caused quake on walk, false otherwise.
 */

bool Actor::quake_on_walk() {
	if (get_info().quake_on_walk()) {
		qsteps = (qsteps + 1) % 5;
		if (!qsteps) {    // Time to roll?
			gwin->get_tqueue()->add(Game::get_ticks() + 10, new Earthquake(2));
		}
		return true;
	}
	return false;
}

/*
 *  Create NPC.
 */

Npc_actor::Npc_actor(
		const std::string& nm,    // Name.  A copy is made.
		int shapenum, int num, int uc)
		: Actor(nm, shapenum, num, uc), nearby(false), num_schedules(0),
		  schedules(nullptr) {}

/*
 *  Kill an actor.
 */

Npc_actor::~Npc_actor() {
	delete[] schedules;
}

/*
 *  Set schedule list.
 */

void Npc_actor::set_schedules(Schedule_change* sc_list, int cnt) {
	delete[] schedules;
	schedules     = sc_list;
	num_schedules = cnt;
}

/*
 *  Set schedule type.
 */

void Npc_actor::set_schedule_time_type(int time, int type) {
	Tile_coord tile;
	int        i;

	for (i = 0; i < num_schedules; i++) {
		if (schedules[i].get_time() == time) {
			break;
		}
	}

	if (i == num_schedules) {    // Didn't find it
		auto* scheds = new Schedule_change[num_schedules + 1];

		for (i = 0; i < num_schedules; i++) {
			tile = schedules[i].get_pos();
			scheds[i].set(
					tile.tx, tile.ty, tile.tz, schedules[i].get_type(),
					schedules[i].get_time());
		}

		scheds[num_schedules].set(
				0, 0, 0, static_cast<unsigned char>(type),
				static_cast<unsigned char>(time));
		set_schedules(scheds, num_schedules + 1);
	} else {    // Did find it
		tile = schedules[i].get_pos();
		schedules[i].set(
				tile.tx, tile.ty, tile.tz, static_cast<unsigned char>(type),
				static_cast<unsigned char>(time));
	}
}

/*
 *  Set schedule location.
 */

void Npc_actor::set_schedule_time_location(int time, int x, int y) {
	int i;

	for (i = 0; i < num_schedules; i++) {
		if (schedules[i].get_time() == time) {
			break;
		}
	}

	if (i == num_schedules) {    // Didn't find it
		Tile_coord tile;
		auto*      scheds = new Schedule_change[num_schedules + 1];

		for (i = 0; i < num_schedules; i++) {
			tile = schedules[i].get_pos();
			scheds[i].set(
					tile.tx, tile.ty, tile.tz, schedules[i].get_type(),
					schedules[i].get_time());
		}

		scheds[num_schedules].set(x, y, 0, 0, static_cast<unsigned char>(time));
		set_schedules(scheds, num_schedules + 1);
	} else {    // Did find it
		schedules[i].set(
				x, y, 0, schedules[i].get_type(),
				static_cast<unsigned char>(time));
	}
}

/*
 *  Remove schedule
 */

void Npc_actor::remove_schedule(int time) {
	int i;

	for (i = 0; i < num_schedules; i++) {
		if (schedules[i].get_time() == time) {
			break;
		}
	}
	if (i != num_schedules) {    // Found it
		const int  todel = i;
		Tile_coord tile;
		auto*      scheds = new Schedule_change[num_schedules - 1];

		for (i = 0; i < todel; i++) {
			tile = schedules[i].get_pos();
			scheds[i].set(
					tile.tx, tile.ty, tile.tz, schedules[i].get_type(),
					schedules[i].get_time());
		}

		for (; i < num_schedules - 1; i++) {
			tile = schedules[i + 1].get_pos();
			scheds[i].set(
					tile.tx, tile.ty, tile.tz, schedules[i + 1].get_type(),
					schedules[i + 1].get_time());
		}

		set_schedules(scheds, num_schedules - 1);
	}
}

/*
 *  Set schedule list.
 */

void Npc_actor::get_schedules(Schedule_change*& sc_list, int& cnt) const {
	sc_list = schedules;
	cnt     = num_schedules;
}

/*
 *  Move and change frame.
 */

void Npc_actor::movef(
		Map_chunk* old_chunk, Map_chunk* new_chunk, int new_sx, int new_sy,
		int new_frame, int new_lift) {
	Actor::movef(old_chunk, new_chunk, new_sx, new_sy, new_frame, new_lift);
	if (old_chunk != new_chunk) {    // In new chunk?
		Npc_actor::switched_chunks(old_chunk, new_chunk);
	}
}

/*
 *  Find day's schedule for a given time-of-day.
 *
 *  Output: index of schedule change.
 *      -1 if not found, or if a party member.
 */

int Npc_actor::find_schedule_change(int hour3    // 0=midnight, 1=3am, etc.
) {
	if (party_id >= 0 || is_dead()) {
		return -1;    // Fail if a party member or dead.
	}
	for (int i = 0; i < num_schedules; i++) {
		if (schedules[i].get_time() == hour3) {
			return i;
		}
	}
	return -1;
}

int Npc_actor::find_schedule_at_time(int hour3    // 0=midnight, 1=3am, etc.
) {
	if (party_id >= 0 || is_dead() || num_schedules == 0) {
		return -1;    // Fail if a party member or dead.
	}
	int closest_dist  = 100;
	int closest_index = 0;
	for (int i = 0; i < num_schedules; i++) {
		const int dist = (hour3 - schedules[i].get_time() + 8) % 8;
		if (dist < closest_dist) {
			closest_dist  = dist;
			closest_index = i;
		}
	}
	assert(closest_dist != 100);
	return closest_index;
}

/*
 *  Update schedule at a 3-hour time change.
 */

void Npc_actor::update_schedule(
		int         hour3,    // 0=midnight, 1=3am, etc.
		int         delay,    // Delay in msecs, or -1 for random.
		Tile_coord* pos       // Were we want to return to.
) {
	int i = find_schedule_change(hour3);
	if (i < 0) {
		// Not found?  Look at prev.
		i = find_schedule_at_time(hour3);
		if (i < 0) {
			return;
		}
		if ((schedule_type == schedules[i].get_type()
			 || restored_schedule == schedules[i].get_type())
			&& old_schedule_loc == schedules[i].get_pos()) {
			restored_schedule = -1;
			return;    // Already in it.
		}
	}
	restored_schedule       = -1;
	old_schedule_loc        = schedules[i].get_pos();
	const Tile_coord newloc = pos ? *pos : schedules[i].get_pos();
	set_schedule_and_loc(schedules[i].get_type(), newloc, delay);
}

/*
 *  Render.
 */

void Npc_actor::paint() {
	Actor::paint();               // Draw on screen.
	if (dormant && schedule &&    // Resume schedule.
								  // FOR NOW:  Not when in formation.
		(party_id < 0 || !gwin->walk_in_formation
		 || schedule_type != Schedule::follow_avatar)) {
		dormant = false;    // But clear out old entries first.??
		gwin->get_tqueue()->remove(this);
		// Force schedule->now_what() in .5secs
		// DO NOT call now_what here!!!
		const uint32 curtime = Game::get_ticks();
		gwin->get_tqueue()->add(curtime + 500, this, gwin);
	}
	if (!nearby) {    // Make sure we're in 'nearby' list.
		gwin->add_nearby_npc(this);
	}
}

/*
 *  Run usecode when double-clicked.
 */
void Npc_actor::activate(int event) {
	if (is_dead() && !cheat.in_map_editor()) {
		return;
	}
	// Converse, etc.
	Actor::activate(event);
}

/*
 *  Handle a time event (for animation).
 */

void Npc_actor::handle_event(
		unsigned long curtime,    // Current time of day.
		uintptr       udata       // Ignored.
) {
	purge_deleted_actions();
	if ((cheat.in_map_editor() && party_id < 0)
		|| (get_flag(Obj_flags::paralyzed) || is_dead() || is_knocked_out()
			|| (get_flag(Obj_flags::asleep)
				&& schedule_type != Schedule::sleep))) {
		gwin->get_tqueue()->add(curtime + gwin->get_std_delay(), this, udata);
		return;
	}
	// Prevent actor from doing anything if not in the active map.
	// ... but not if the NPC is not on the map (breaks pathfinding
	// from offscreen if NPC not on map).
	if (get_map() && get_map() != gwin->get_map()) {
		set_action(nullptr);
		dormant = true;
		if (schedule) {
			schedule->im_dormant();
		}
		return;
	}

	// Goblins in goblin village should be overly aggressive.
	if (is_goblin() && in_goblin_village(this) && party_id < 0 && can_act()
		&& schedule
		&& (schedule_type != Schedule::combat
			&&    // Not if already in combat.
				  // Patrol schedule already does this.
			schedule_type != Schedule::patrol
			&& schedule_type != Schedule::sleep
			&& schedule_type != Schedule::wait
			&& schedule_type != Schedule::arrest_avatar)) {
		schedule->seek_foes();
	}

	if (!action) {    // Not doing anything?
		frame_time = 0;
		if (in_usecode_control() || !can_act()) {
			// Can't move on our own. Keep trying.
			gwin->get_tqueue()->add(
					curtime + gwin->get_std_delay(), this, udata);
		} else if (schedule) {
			if (!dormant) {
				schedule->now_what();
			} else {
				schedule->im_dormant();
			}
		}
	} else {
		// Do what we should.
		int delay = party_id < 0 ? gwin->is_time_stopped() : 0;
		if (delay <= 0) {    // Time not stopped?
			const int speed = action->get_speed();
			delay           = action->handle_event(this);
			if (!delay) {
				// Action finished. Add a slight delay.
				frame_time = speed;
				if (!frame_time) {    // Not a path. Add a delay anyway.
					frame_time = gwin->get_std_delay();
				}
				delay = frame_time;
				set_action(nullptr);
			}
		}
		gwin->get_tqueue()->add(curtime + delay, this, udata);
	}
}

/*
 *  Step onto an adjacent tile.
 *
 *  Output: false if blocked (or paralyzed).
 *      Dormant is set if off screen.
 */

bool Npc_actor::step(
		Tile_coord t,        // Tile to step onto.
		int        frame,    // New frame #.
		bool       force) {
	if (get_flag(Obj_flags::paralyzed) || get_map() != gmap) {
		return false;
	}
	const Tile_coord oldtile = get_tile();
	// Get old chunk.
	t.fixme();
	// Get chunk.
	const int cx = t.tx / c_tiles_per_chunk;
	const int cy = t.ty / c_tiles_per_chunk;
	// Get rel. tile coords.
	const int tx = t.tx % c_tiles_per_chunk;
	const int ty = t.ty % c_tiles_per_chunk;
	// Get ->new chunk.
	Map_chunk* nlist = gmap->get_chunk_safely(cx, cy);
	if (!nlist) {    // Shouldn't happen!
		stop();
		return false;
	}
	bool water;
	bool poison;    // Get tile info.
	get_tile_info(this, gwin, nlist, tx, ty, water, poison);
	if (is_blocked(t, nullptr, force ? MOVE_ALL : 0)) {
		if (is_really_blocked(t, force)) {
			if (schedule) {    // Tell scheduler.
				schedule->set_blocked(t);
			}
			stop();
			// Offscreen, but not in party?
			if (!gwin->add_dirty(this) && party_id < 0 &&
				// And > a screenful away?
				distance(gwin->get_camera_actor()) > 1 + c_screen_tile_size) {
				dormant = true;    // Go dormant.
			}
			return false;    // Done.
		}
	}
	if (poison && t.tz == 0) {
		Actor::set_flag(static_cast<int>(Obj_flags::poisoned));
	}
	// Check for scrolling.
	gwin->scroll_if_needed(this, t);
	add_dirty();    // Set to repaint old area.
	// Move it.
	Map_chunk* olist = get_chunk();
	movef(olist, nlist, tx, ty, frame, t.tz);

	// Near an egg?  (Do this last, since
	//   it may teleport.)
	nlist->activate_eggs(this, t.tx, t.ty, t.tz, oldtile.tx, oldtile.ty);

	// Offscreen, but not in party?
	if (!add_dirty(true) && party_id < 0 &&
		// And > a screenful away?
		distance(gwin->get_camera_actor()) > 1 + c_screen_tile_size &&
		//++++++++Try getting rid of the 'talk' line:
		get_schedule_type() != Schedule::talk
		&& get_schedule_type() != Schedule::street_maintenance) {
		// No longer on screen.
		stop();
		dormant = true;
		return false;
	}
	quake_on_walk();
	return true;    // Add back to queue for next time.
}

/*
 *  Remove an object from its container, or from the world.
 *  The object is deleted.
 */

void Npc_actor::remove_this(
		Game_object_shared* keep    // Non-null to not delete.
) {
	set_action(nullptr);
	//	delete schedule; // Problems in SI monster creation.
	//	schedule = nullptr;
	// Messes up resurrection   num_schedules = 0;
	gwin->get_tqueue()->remove(this);    // Remove from time queue.
	gwin->remove_nearby_npc(this);       // Remove from nearby list.
	// Store old chunk list.
	Map_chunk*         olist = get_chunk();
	Game_object_shared keep_this;
	Actor::remove_this(&keep_this);    // Remove, but don't ever delete an NPC
	Npc_actor::switched_chunks(olist, nullptr);
	set_invalid();
	if (!keep && npc_num > 0) {    // Really going?
		unused = true;             // Mark unused if a numbered NPC.
	}
	if (keep) {
		*keep = std::move(keep_this);
	}
}

/*
 *  Update chunks' npc lists after this has moved.
 */

void Npc_actor::switched_chunks(
		Map_chunk* olist,    // Old chunk, or null.
		Map_chunk* nlist     // New chunk, or null.
) {
	ignore_unused_variable_warning(olist, nlist);
	//++++++++++No longer needed.  Maybe it should go away.
}

/*
 *  Move (teleport) to a new spot.
 */

void Npc_actor::move(int newtx, int newty, int newlift, int newmap) {
	// prevent teleporting if dead
	if (is_dead()) {
		return;
	}
	// Store old chunk list.
	Map_chunk* olist = get_chunk();
	// Move it.
	Actor::move(newtx, newty, newlift, newmap);
	Map_chunk* nlist = get_chunk();
	if (nlist != olist) {
		Npc_actor::switched_chunks(olist, nlist);
		if (!olist) {          // Moving back into world?
			dormant = true;    // Cause activation if painted.
		}
	}
}

/*
 *  Get # of NPC a body came from (or -1 if not known).
 */

int Dead_body::get_live_npc_num() const {
	return npc_num;
}

/*
 *  Get size of IREG. Returns -1 if can't write to buffer.
 */

int Dead_body::get_ireg_size() {
	const int size = Container_game_object::get_ireg_size();
	return size < 0 ? size : size + 1;
}

/*
 *  Write out body and its members.
 */

void Dead_body::write_ireg(ODataSource* out) {
	unsigned char        buf[21];    // 13-byte entry - Exult extension.
	uint8*               ptr   = write_common_ireg(13, buf);
	Game_object*         first = objects.get_first();    // Guessing: +++++
	const unsigned short tword = first ? first->get_prev()->get_shapenum() : 0;
	little_endian::Write2(ptr, tword);
	Write1(ptr, 0);    // Unknown.
	Write1(ptr, get_quality());
	const int npc = get_live_npc_num();    // If body, get source.
	// Here, store NPC # more simply.
	little_endian::Write2(ptr, npc);    // Allowing larger range of NPC bodies.
	Write1(ptr, nibble_swap(get_lift()));                     // Lift
	Write1(ptr, static_cast<unsigned char>(get_obj_hp()));    // Resistance.
	// Flags:  B0=invis. B3=okay_to_take.
	Write1(ptr, (get_flag(Obj_flags::invisible) ? 1 : 0)
						+ (get_flag(Obj_flags::okay_to_take) ? (1 << 3) : 0));
	out->write(reinterpret_cast<char*>(buf), ptr - buf);
	write_contents(out);    // Write what's contained within.
	// Write scheduled usecode.
	Game_map::write_scheduled(out, this);
}

/*
 *  Create a sequence of frames.
 */

Frames_sequence::Frames_sequence(
		int            cnt,    // # of frames.
		unsigned char* f       // List of frames.
		)
		: num_frames(cnt) {
	frames = new unsigned char[cnt];
	memcpy(frames, f, cnt);    // Copy in the list.
}