Fix T88188: Allow keyframing vertex mass in cloth sim

Update vertex weights between simulation steps if they have changed.
This allows for animated vertex weights in the cloth sim.

Reviewed By: Sebastian Parborg

Differential Revision: http://developer.blender.org/D11640

1 files changed, 5 insertions, 1 deletions

diff --git a/source/blender/simulation/intern/SIM_mass_spring.cpp b/source/blender/simulation/intern/SIM_mass_spring.cpp
index cf654ebff07..ca01120eecb 100644
--- a/source/blender/simulation/intern/SIM_mass_spring.cpp
+++ b/source/blender/simulation/intern/SIM_mass_spring.cpp
@@ -203,7 +203,7 @@ int SIM_cloth_solver_init(Object *UNUSED(ob), ClothModifierData *clmd)
   cloth->implicit = id = SIM_mass_spring_solver_create(cloth->mvert_num, nondiag);
 
   for (i = 0; i < cloth->mvert_num; i++) {
-    SIM_mass_spring_set_vertex_mass(id, i, verts[i].mass);
+    SIM_mass_spring_set_implicit_vertex_mass(id, i, verts[i].mass);
   }
 
   for (i = 0; i < cloth->mvert_num; i++) {
@@ -213,6 +213,10 @@ int SIM_cloth_solver_init(Object *UNUSED(ob), ClothModifierData *clmd)
   return 1;
 }
 
+void SIM_mass_spring_set_implicit_vertex_mass(Implicit_Data *data, int index, float mass){
+  SIM_mass_spring_set_vertex_mass(data, index, mass);
+}
+
 void SIM_cloth_solver_free(ClothModifierData *clmd)
 {
   Cloth *cloth = clmd->clothObject;