knife tool modifications

from user freedback it seems there are 2 use cases, both valid.
* Select geometry and cut the selection in half (as 2.4x worked)
* Point-to-point define the faces to cut, dont cut through everything (only cut what you see).

With the second, since you are already selecting the edges to cut and snapping to them. only cutting the selecting is limiting/annoying.


Modifying these options while the knife tool runs doesn't work well, so expose under 2 keys, K, Shift-K.

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/editors/mesh/editmesh_bvh.h b/source/blender/editors/mesh/editmesh_bvh.h
index 2b0a7cc02dd..e2b45062e41 100644
--- a/source/blender/editors/mesh/editmesh_bvh.h
+++ b/source/blender/editors/mesh/editmesh_bvh.h
@@ -64,7 +64,8 @@ struct BMVert *BMBVH_FindClosestVert(struct BMBVHTree *tree, float *co, float ma
 enum {
 	BMBVH_USE_CAGE        = 1, /* project geometry onto modifier cage */
 	BMBVH_RETURN_ORIG     = 2, /* use with BMBVH_USE_CAGE, returns hits in relation to original geometry */
-	BMBVH_RESPECT_HIDDEN  = 4
+	BMBVH_RESPECT_SELECT  = 4, /* restrict to hidden geometry (overrides BMBVH_RESPECT_HIDDEN) */
+	BMBVH_RESPECT_HIDDEN  = 8  /* omit hidden geometry */
 };
 
 #endif /* __EDITBMESH_BVH_H__ */