[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [49732] trunk/blender/source/blender/ blenkernel/intern/cloth.c: Bugfix/Enhancement: Cloth didn' t support animated vertex groups like the "Vertex Weight" modifier.

[Daniel Genrich]

Revision: 49732
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=49732
Author:   genscher
Date:     2012-08-09 13:33:27 +0000 (Thu, 09 Aug 2012)
Log Message:
-----------
Bugfix/Enhancement: Cloth didn't support animated vertex groups like the "Vertex Weight" modifier.

Regression blend file: http://wiki.blender.org/uploads/b/b8/Cloth_anim_vertex.blend

Thanks to Kologe for reporting this problem and also providing the regression blend file.

Modified Paths:
--------------
    trunk/blender/source/blender/blenkernel/intern/cloth.c

Modified: trunk/blender/source/blender/blenkernel/intern/cloth.c
===================================================================
--- trunk/blender/source/blender/blenkernel/intern/cloth.c	2012-08-09 12:08:35 UTC (rev 49731)
+++ trunk/blender/source/blender/blenkernel/intern/cloth.c	2012-08-09 13:33:27 UTC (rev 49732)
@@ -96,6 +96,7 @@
 static void cloth_to_object (Object *ob,  ClothModifierData *clmd, float (*vertexCos)[3]);
 static void cloth_from_mesh ( ClothModifierData *clmd, DerivedMesh *dm );
 static int cloth_from_object(Object *ob, ClothModifierData *clmd, DerivedMesh *dm, float framenr, int first);
+static void cloth_update_springs( ClothModifierData *clmd );
 static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm );
 static void cloth_apply_vgroup ( ClothModifierData *clmd, DerivedMesh *dm );
 
@@ -404,6 +405,10 @@
 	}
 
 	effectors = pdInitEffectors(clmd->scene, ob, NULL, clmd->sim_parms->effector_weights);
+
+	/* Support for dynamic vertex groups, changing from frame to frame */
+	cloth_apply_vgroup ( clmd, result );
+	cloth_update_springs( clmd );
 	
 	tstart();
 
@@ -793,6 +798,8 @@
 			dvert = dm->getVertData ( dm, i, CD_MDEFORMVERT );
 			if ( dvert ) {
 				for ( j = 0; j < dvert->totweight; j++ ) {
+
+					verts->flags &= ~CLOTH_VERT_FLAG_PINNED;
 					if (( dvert->dw[j].def_nr == (clmd->sim_parms->vgroup_mass-1)) && (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_GOAL )) {
 						verts->goal = dvert->dw [j].weight;
 						/* goalfac= 1.0f; */ /* UNUSED */
@@ -803,9 +810,8 @@
 						*/
 						
 						verts->goal  = powf(verts->goal, 4.0f);
-						if ( verts->goal >=SOFTGOALSNAP ) {
+						if ( verts->goal >=SOFTGOALSNAP )
 							 verts->flags |= CLOTH_VERT_FLAG_PINNED;
-						}
 					}
 					
 					if (clmd->sim_parms->flags & CLOTH_SIMSETTINGS_FLAG_SCALING ) {
@@ -819,6 +825,7 @@
 						}
 					}
 
+					verts->flags &= ~CLOTH_VERT_FLAG_NOSELFCOLL;
 					if (clmd->coll_parms->flags & CLOTH_COLLSETTINGS_FLAG_SELF ) {
 						if ( dvert->dw[j].def_nr == (clmd->coll_parms->vgroup_selfcol-1)) {
 							if (dvert->dw [j].weight > 0.0f) {
@@ -826,13 +833,6 @@
 							}
 						}
 					}
-					/*
-					// for later
-					if ( dvert->dw[j].def_nr == (clmd->sim_parms->vgroup_weight-1))
-					{
-						verts->mass = dvert->dw [j].weight;
-					}
-					*/
 				}
 			}
 		}
@@ -1058,6 +1058,37 @@
 		BLI_edgehash_free ( cloth->edgehash, NULL );
 }
 
+/* update stiffness if vertex group values are changing from frame to frame */
+static void cloth_update_springs( ClothModifierData *clmd )
+{
+	Cloth *cloth = clmd->clothObject;
+	LinkNode *search = NULL;
+
+	search = cloth->springs;
+	while (search) {
+		ClothSpring *spring = search->link;
+
+		spring->stiffness = 0.0f;
+
+		if(spring->type == CLOTH_SPRING_TYPE_STRUCTURAL)
+		{
+			spring->stiffness = (cloth->verts[spring->kl].struct_stiff + cloth->verts[spring->ij].struct_stiff) / 2.0f;
+		}
+		else if(spring->type == CLOTH_SPRING_TYPE_SHEAR)
+		{
+			spring->stiffness = (cloth->verts[spring->kl].shear_stiff + cloth->verts[spring->ij].shear_stiff) / 2.0f;
+		}
+		else if(spring->type == CLOTH_SPRING_TYPE_BENDING)
+		{
+			spring->stiffness = (cloth->verts[spring->kl].bend_stiff + cloth->verts[spring->ij].bend_stiff) / 2.0f;
+		}
+		
+		search = search->next;
+	}
+
+
+}
+
 static int cloth_build_springs ( ClothModifierData *clmd, DerivedMesh *dm )
 {
 	Cloth *cloth = clmd->clothObject;