* Lower the required number of vertices from four to three. The new
backend correctly outputs a triangle in this case.
* Fix the check for the number of input vertices. Before it was
counting total number of input elements including edges and faces.
* Don't mark edges as holes if they are loose.
* Don't allow duplicate faces to be created.
* If use_existing_faces isn't enabled, but a face in the convex hull
has the same vertices as an existing face in the mesh, mark it as
output geometry rather than interior geometry.
* Fixes bug [#32960] Convex hull operator crashes when 'make holes' is
selected.
projects.blender.org/tracker/?func=detail&atid=498&aid=32960&group_id=9
* Bullet's convex hull implementation is significantly more robust
than the one I implemented, as well as being faster.
* This fixes bug [#32864] "Convex Hull fails in some cases."
projects.blender.org/tracker/?func=detail&aid=32864&group_id=9&atid=498
That bug, and others like it, relate to the poor handling of
co-planar surfaces in the input. Pretty much any model that is
simple-subdivided a few times gave very bad results before, Bullet's
implementation handles this much better.
* In order to ensure a smooth transition, the Bullet output is
translated into the existing HullTriangle hash structure. This makes
it easy to ensure that the existing slot output stays the same; the
interactions between the slots are somewhat complicated, detangling
is a TODO.
* Reviewed by Brecht:
https://codereview.appspot.com/6741063
Added four new functions as shortcuts to creating GHashes that use the
standard ptr/str/int/pair hash and compare functions.
GHash *BLI_ghash_ptr_new(const char *info);
GHash *BLI_ghash_str_new(const char *info);
GHash *BLI_ghash_int_new(const char *info);
GHash *BLI_ghash_pair_new(const char *info);
Replaced almost all occurrences of BLI_ghash_new() with one of the
above functions.
