BMesh: mesh-data picking, general improvements

Generalize logic for vert/edge/face selection:
- index cycling.
- selection bias with mixed modes.

Details:
- Edges now support index cycling (as verts/faces did already)
- Cycling over near elements is now only enabled when the mouse position remains the same.
- No longer do 2 selection passes to perform index cycling.

Fixes:
- Edges behind the view could be selected (surprising nobody reported!)
- Selection bias now only changes the element that gets picked without interning the return distance
  (was buggy with mixed modes).

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/editors/include/ED_view3d.h b/source/blender/editors/include/ED_view3d.h
index 6be7f706f28..ab270f657a4 100644
--- a/source/blender/editors/include/ED_view3d.h
+++ b/source/blender/editors/include/ED_view3d.h
@@ -271,7 +271,7 @@ void          ED_view3d_backbuf_validate(struct ViewContext *vc);
 struct ImBuf *ED_view3d_backbuf_read(struct ViewContext *vc, short xmin, short ymin, short xmax, short ymax);
 unsigned int  ED_view3d_backbuf_sample_rect(
         struct ViewContext *vc, const int mval[2], int size,
-        unsigned int min, unsigned int max, float *dist);
+        unsigned int min, unsigned int max, float *r_dist);
 int          ED_view3d_backbuf_sample_size_clamp(struct ARegion *ar, const float dist);
 unsigned int ED_view3d_backbuf_sample(struct ViewContext *vc, int x, int y);