removed my SB hack from particle collision code

(which still can't really handle moving targets)
leaving 2 bug fixes
1. multiple objects need a reset on cache variable
2. quads always need to be handled as 2 triangles
(since they don't need to share a plane)

added a collision detecting function in effect.c for SB
( no need to be there, but i did not find a better place )
but should handle 'moving targets' up to 0.2 blender units/frame

well .. important info in this case:
collision
uses 'face normal' to decide if *intrusion* happend
uses 'damping' of collision target to slow down movement
when *intrusion* happend

+some more removing unneeded code in softbody.c

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_softbody.h b/source/blender/blenkernel/BKE_softbody.h
index 09be644c9e7..e612769c305 100644
--- a/source/blender/blenkernel/BKE_softbody.h
+++ b/source/blender/blenkernel/BKE_softbody.h
@@ -39,6 +39,7 @@ typedef struct BodyPoint {
 	float weight, goal;
 	float prevpos[3], prevvec[3], prevdx[3], prevdv[3]; /* used for Heun integration */
     int nofsprings; int *springs;
+	float contactfrict;
 } BodyPoint;
 
 typedef struct BodySpring {