General particle bug fixes + few small goodies

The goodies:
* Curves can be used as normal dynamic effectors too with 
  the new "curve" field shape.
* Group visualization has optional duplication counts for
  each object in the specified group.
* Object & group visualizations, which are done without
  taking the dupliobject's global position into account
  (unless the whole group is used). This is much nicer than
  the previous behavior, but I added a "Use Global Location"
  option for those who want to use it the old way.
* The active particle system's particles are now drawn a 
  with theme coloured outline instead of pure white.
* Added object aligned velocity factors (buttons categorized
  and re-organized too).

Bug fixes:
* Absorption didn't work as the ui toggle button was forgotten.
* Some other force field ui tweaks.
* Crash after adding children and changing trails count.
* Display types "cross" and "axis" crashed.
* Particles weren't drawn with correct coloring.
* Billboards didn't update properly in viewport to camera
  location changes.
* Particle rotation wasn't recreated correctly from point cache.
* Changing particles amount crashed sometimes.
* Some files with child hair crashed on loading.
* Compiler warning fixes.
* Adding boids crashed on frame 1;

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_bvhutils.h b/source/blender/blenkernel/BKE_bvhutils.h
index 66c8d99959a..e2911a30b25 100644
--- a/source/blender/blenkernel/BKE_bvhutils.h
+++ b/source/blender/blenkernel/BKE_bvhutils.h
@@ -57,6 +57,7 @@ typedef struct BVHTreeFromMesh
 
 	/* Vertex array, so that callbacks have instante access to data */
 	struct MVert *vert;
+	struct MEdge *edge;		/* only used for BVHTreeFromMeshEdges */
 	struct MFace *face;
 
 	/* radius for raycast */
@@ -96,6 +97,8 @@ BVHTree* bvhtree_from_mesh_verts(struct BVHTreeFromMesh *data, struct DerivedMes
  */
 BVHTree* bvhtree_from_mesh_faces(struct BVHTreeFromMesh *data, struct DerivedMesh *mesh, float epsilon, int tree_type, int axis);
 
+BVHTree* bvhtree_from_mesh_edges(struct BVHTreeFromMesh *data, struct DerivedMesh *mesh, float epsilon, int tree_type, int axis);
+
 /*
  * Frees data allocated by a call to bvhtree_from_mesh_*.
  */
@@ -109,6 +112,7 @@ void free_bvhtree_from_mesh(struct BVHTreeFromMesh *data);
 //Using local coordinates
 #define BVHTREE_FROM_FACES		0
 #define BVHTREE_FROM_VERTICES	1
+#define BVHTREE_FROM_EDGES		2
 
 typedef LinkNode* BVHCache;