add api for set global solver parameters

genesis/engine/solvers/rigid/constraint_solver_decomp.py

@@ -168,10 +168,7 @@ def add_collision_constraints(self):
 
                     if ti.static(self.sparse_solve):
                         self.jac_n_relevant_dofs[n_con, i_b] = con_n_relevant_dofs
-
-                    imp, aref = gu.imp_aref(
-                        self._solver._sol_contact_resolve_time, impact.sol_params, -impact.penetration, jac_qvel
-                    )
+                    imp, aref = gu.imp_aref(impact.sol_params, -impact.penetration, jac_qvel)
 
                     diag = t + impact.friction * impact.friction * t
                     diag *= 2 * impact.friction * impact.friction * (1 - imp) / ti.max(imp, gs.EPS)
@@ -199,12 +196,7 @@ def add_joint_limit_constraints(self):
 
                     jac = side
                     jac_qvel = jac * self._solver.dofs_state[i_d, i_b].vel
-                    imp, aref = gu.imp_aref(
-                        self._solver._sol_contact_resolve_time,
-                        self._solver.dofs_info[i_d].sol_params,
-                        pos,
-                        jac_qvel,
-                    )
+                    imp, aref = gu.imp_aref(self._solver.dofs_info[i_d].sol_params, pos, jac_qvel)
                     diag = self._solver.dofs_info[i_d].invweight * (pos < 0) * (1 - imp) / (imp + gs.EPS)
                     aref = aref * (pos < 0)
                     if pos < 0:

genesis/engine/solvers/rigid/constraint_solver_decomp_island.py

@@ -196,7 +196,7 @@ def add_collision_constraints(self, island, i_b):
                     self.jac_n_relevant_dofs[n_con, i_b] = con_n_relevant_dofs
 
                 imp, aref = gu.imp_aref(
-                    self._solver._sol_contact_resolve_time, impact.sol_params, -impact.penetration, jac_qvel
+                    impact.sol_params, -impact.penetration, jac_qvel
                 )
 
                 diag = t + impact.friction * impact.friction * t
@@ -235,12 +235,7 @@ def add_joint_limit_constraints(self, island, i_b):
 
                     jac = side
                     jac_qvel = jac * self._solver.dofs_state[i_d, i_b].vel
-                    imp, aref = gu.imp_aref(
-                        self._solver._sol_contact_resolve_time,
-                        self._solver.dofs_info[i_d].sol_params,
-                        pos,
-                        jac_qvel,
-                    )
+                    imp, aref = gu.imp_aref(self._solver.dofs_info[i_d].sol_params, pos, jac_qvel)
                     diag = self._solver.dofs_info[i_d].invweight * (pos < 0) * (1 - imp) / (imp + gs.EPS)
                     aref = aref * (pos < 0)
                     if pos < 0:

genesis/engine/solvers/rigid/rigid_solver_decomp.py

@@ -351,7 +351,7 @@ def _kernel_init_dof_fields(
             for j in ti.static(range(7)):
                 self.dofs_info[i].sol_params[j] = dofs_sol_params[i, j]
 
-            self.dofs_info[i].sol_params[0] = self._substep_dt * 2
+            self.dofs_info[i].sol_params[0] = self._sol_contact_resolve_time
 
             self.dofs_info[i].armature = dofs_armature[i]
             self.dofs_info[i].invweight = dofs_invweight[i]
@@ -776,6 +776,7 @@ def _kernel_init_geom_fields(
             for j in ti.static(range(7)):
                 self.geoms_info[i].data[j] = geoms_data[i, j]
                 self.geoms_info[i].sol_params[j] = geoms_sol_params[i, j]
+            self.geoms_info[i].sol_params[0] = self._sol_contact_resolve_time
 
             self.geoms_info[i].sol_params[0] = ti.max(self.geoms_info[i].sol_params[0], self._substep_dt * 2)
 
@@ -3319,6 +3320,27 @@ def _kernel_set_qpos(
         for i_q_, i_b_ in ti.ndrange(qs_idx.shape[0], envs_idx.shape[0]):
             self.qpos[qs_idx[i_q_], envs_idx[i_b_]] = qpos[i_b_, i_q_]
 
+    def set_global_sol_params(self, sol_params):
+        """
+        Solver parameters (timeconst, dampratio, dmin, dmax, width, mid, power). 
+        Reference: https://mujoco.readthedocs.io/en/latest/modeling.html#solver-parameters
+        """
+        assert len(sol_params) == 7
+        self._kernel_set_global_sol_params(sol_params)
+
+    @ti.kernel
+    def _kernel_set_global_sol_params(self, sol_params: ti.types.ndarray()):
+        ti.loop_config(serialize=self._para_level < gs.PARA_LEVEL.PARTIAL)
+        for i in range(self.n_geoms):
+            for j in ti.static(range(7)):
+                self.geoms_info[i].sol_params[j] = sol_params[j]
+
+        ti.loop_config(serialize=self._para_level < gs.PARA_LEVEL.PARTIAL)
+        for i, b in ti.ndrange(self.n_dofs, self._B):
+            for j in ti.static(range(7)):
+                self.dofs_info[i].sol_params[j] = sol_params[j]
+
+            self.dofs_info[i].sol_params[0] = self._substep_dt * 2
     def set_dofs_kp(self, kp, dofs_idx):
         kp, dofs_idx = self._validate_1D_io_variables(kp, dofs_idx, batched=False)
         self._kernel_set_dofs_kp(kp, dofs_idx)

genesis/utils/geom.py

@@ -306,9 +306,9 @@ def orthogonals2(a):
 
 
 @ti.func
-def imp_aref(timeconst, params, pos, vel):
+def imp_aref(params, pos, vel):
     # The first term in parms is the timeconst parsed from mjcf. However, we don't use it here but use the one passed in, which is 2*substep_dt.
-    _, dampratio, dmin, dmax, width, mid, power = params
+    timeconst, dampratio, dmin, dmax, width, mid, power = params
     imp_x = ti.abs(pos) / width
     imp_a = (1.0 / mid ** (power - 1)) * imp_x**power
     imp_b = 1 - (1.0 / (1 - mid) ** (power - 1)) * (1 - imp_x) ** power