GLTFAsset.loadSkins

src/dagon/resource/gltf/package.d

@@ -62,6 +62,7 @@ import dagon.resource.gltf.accessor;
 import dagon.resource.gltf.meshprimitive;
 import dagon.resource.gltf.mesh;
 import dagon.resource.gltf.node;
+import dagon.resource.gltf.skin;
 
 Vector3f asVector(JSONValue value)
 {
@@ -141,6 +142,7 @@ class GLTFAsset: Asset, TriangleSet
     Array!Texture textures;
     Array!Material materials;
     Array!GLTFNode nodes;
+    Array!GLTFSkin skins;
     Array!GLTFScene scenes;
     Entity rootEntity;
 
@@ -168,7 +170,9 @@ class GLTFAsset: Asset, TriangleSet
         loadTextures(doc.root);
         loadMaterials(doc.root);
         loadMeshes(doc.root);
+        loadAnimations(doc.root);
         loadNodes(doc.root);
+        loadSkins(doc.root);
         loadScenes(doc.root);
         return true;
     }
@@ -797,6 +801,48 @@ class GLTFAsset: Asset, TriangleSet
         rootEntity.updateTransformationTopDown();
     }
 
+    void loadSkins(JSONValue root)
+    {
+        if ("skins" in root.asObject)
+        {
+            foreach(i, s; root.asObject["skins"].asArray)
+            {
+                auto skin = s.asObject;
+
+                GLTFSkin skinObj = New!GLTFSkin(this);
+
+                if ("joins" in skin)
+                {
+                    foreach(ni, n; skin["joins"].asArray)
+                    {
+                        uint nodeIndex = cast(uint)n.asNumber;
+                        if (nodeIndex < nodes.length)
+                            skinObj.joints.insertBack(nodes[nodeIndex]);
+                    }
+                }
+
+                if ("inverseBindMatrices" in skin)
+                {
+                    GLTFAccessor invBindMatricesAccessor;
+                    uint invBindMatricesAccessorIndex = cast(uint)skin["inverseBindMatrices"].asNumber;
+                    if (invBindMatricesAccessorIndex < accessors.length)
+                        invBindMatricesAccessor = accessors[invBindMatricesAccessorIndex];
+                    else
+                        writeln("Warning: nonexistent accessor ", invBindMatricesAccessorIndex);
+
+                    skinObj.invBindMatricesAccessor = invBindMatricesAccessor;
+                }
+
+                skins.insertBack(skinObj);
+            }
+        }
+    }
+
+    void loadAnimations(JSONValue root)
+    {
+        // TODO
+    }
+
     void loadScenes(JSONValue root)
     {
         if ("scenes" in root.asObject)
@@ -890,6 +936,10 @@ class GLTFAsset: Asset, TriangleSet
             deleteOwnedObject(no);
         nodes.free();
 
+        foreach(sko; skins)
+            deleteOwnedObject(sko);
+        skins.free();
+
         foreach(sc; scenes)
             deleteOwnedObject(sc);
         scenes.free();

src/dagon/resource/gltf/skin.d

@@ -0,0 +1,51 @@
+/*
+Copyright (c) 2024 Timur Gafarov
+
+Boost Software License - Version 1.0 - August 17th, 2003
+Permission is hereby granted, free of charge, to any person or organization
+obtaining a copy of the software and accompanying documentation covered by
+this license (the "Software") to use, reproduce, display, distribute,
+execute, and transmit the Software, and to prepare derivative works of the
+Software, and to permit third-parties to whom the Software is furnished to
+do so, all subject to the following:
+
+The copyright notices in the Software and this entire statement, including
+the above license grant, this restriction and the following disclaimer,
+must be included in all copies of the Software, in whole or in part, and
+all derivative works of the Software, unless such copies or derivative
+works are solely in the form of machine-executable object code generated by
+a source language processor.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
+*/
+module dagon.resource.gltf.skin;
+
+import std.stdio;
+
+import dlib.core.ownership;
+import dlib.container.array;
+
+import dagon.resource.gltf.node;
+import dagon.resource.gltf.accessor;
+
+class GLTFSkin: Owner
+{
+    Array!GLTFNode joints;
+    GLTFAccessor invBindMatricesAccessor;
+
+    this(Owner o)
+    {
+        super(o);
+    }
+
+    ~this()
+    {
+        joints.free();
+    }
+}