[Bf-blender-cvs] [396f7ea] master: Don't try to enforce a velocity change for pinned vertices; their velocity is defined externally by hair root motion.

[Lukas Tönne]

Commit: 396f7ea1582b89fa33af4b4ff0a5562534316f7b
Author: Lukas Tönne
Date:   Thu Sep 4 19:58:17 2014 +0200
Branches: master
https://developer.blender.org/rB396f7ea1582b89fa33af4b4ff0a5562534316f7b

Don't try to enforce a velocity change for pinned vertices; their
velocity is defined externally by hair root motion.

===================================================================

M       source/blender/blenkernel/intern/implicit.c

===================================================================

diff --git a/source/blender/blenkernel/intern/implicit.c 
b/source/blender/blenkernel/intern/implicit.c
index 0d4a7ec..227bd2a 100644
--- a/source/blender/blenkernel/intern/implicit.c
+++ b/source/blender/blenkernel/intern/implicit.c
@@ -1768,18 +1768,15 @@ static void setup_constraint_matrix(ClothModifierData 
*clmd, ColliderContacts *c
        int numverts = clmd->clothObject->numverts;
        int i, j, v;
 
-       /* Clear matrix from old vertex constraints */
-       for (v = 0; v < S[0].vcount; v++)
-               S[v].c = S[v].r = 0;
-
-       /* pinned vertex constraints */
        for (v = 0; v < numverts; v++) {
                S[v].c = S[v].r = v;
                if (verts[v].flags & CLOTH_VERT_FLAG_PINNED) {
-                       negate_v3_v3(z[v], verts[v].v);
+                       /* pinned vertex constraints */
+                       zero_v3(z[v]); /* velocity is defined externally */
                        zero_m3(S[v].m);
                }
                else {
+                       /* free vertex */
                        zero_v3(z[v]);
                        unit_m3(S[v].m);
                }

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