adaptive_cloth: ClothNodeData: interp goal correctly

The goal of the ClothVertex causes the vertex to move towards xconst
so it doesn't make sense to interpolate the goal since this will lead
to a gradient for the goal and this is not artist friendly, there
would be no way for the artist to define only a specific vertex to be
attached to a point in 3D space.

1 files changed, 5 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/cloth_remesh.cc b/source/blender/blenkernel/intern/cloth_remesh.cc
index d1aeec382a8..ec4009f1e37 100644
--- a/source/blender/blenkernel/intern/cloth_remesh.cc
+++ b/source/blender/blenkernel/intern/cloth_remesh.cc
@@ -148,7 +148,11 @@ class ClothNodeData {
     interp_v3_v3v3(cn.txold, this->cloth_node_data.txold, other.cloth_node_data.txold, 0.5);
     interp_v3_v3v3(cn.tv, this->cloth_node_data.tv, other.cloth_node_data.tv, 0.5);
     cn.mass = simple_interp(this->cloth_node_data.mass, other.cloth_node_data.mass);
-    cn.goal = simple_interp(this->cloth_node_data.goal, other.cloth_node_data.goal);
+    /* No new nodes should have a goal since the artist has not added
+     * the node and iterpolating the weights for newly added nodes can
+     * lead to unexpected results that cannot be fixed by the
+     * artist */
+    cn.goal = 0.0;
     interp_v3_v3v3(cn.impulse, this->cloth_node_data.impulse, other.cloth_node_data.impulse, 0.5);
     interp_v3_v3v3(cn.xrest, this->cloth_node_data.xrest, other.cloth_node_data.xrest, 0.5);
     interp_v3_v3v3(cn.dcvel, this->cloth_node_data.dcvel, other.cloth_node_data.dcvel, 0.5);