Thanks for Sergey for finding the bug & patching, This fix works a bit differently.
Theres no need to allocate the customdata in the first place - since its written into. So add a flag for vert/edge/face/loop creation functions so they can skip customdata creation.
- BMO_slot_copy now only copies compatible elements.
other minor changes
- don't use text.format(...), convention for UI scripts is C style string formatting.
- rename bmo_edgenet_prepare --> bmo_edgenet_prepare_exec
- float/double warning in bevel.
some of these were only returning a boolean, others returned a count even though only a boolean was needed.
split some of the functions in two as well where check/count are both needed.
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.
- memset(..., -1) is used incorrectly even though it worked: MOD_solidify.c - thanks Halley from IRC for noticing this. use fill_vn_i() instead.
- quiet warnings in editmesh_slide.c
- cleanup comments in bmesh and some other minor comment additions.
Added function: BM_face_create_ngon_vcloud
creating quads and tris use this too since it finds the best face winding direction based on surrounding face (if any)
* name bmesh operator func's BMO_slot_buffer_* rather then BMO_slot_* since it wasnt obvious some only dealt with buffer, some both.
* more typechecks and asserts of BMO_ functions (I lost some time calling a map with a buffer function that failed silently).
* small speedup for extrude check - test if the edge is wire _before_ doign a hash lookup.
when making a quad from 2 edges - it was comparing the edge lengths to avoid making a bowtie quad. but this doesnt work in all cases, now compare normals instead.
the problem was a triangle couldnt be made when there was a quad that used 3 of the verts.
* now check if overlapping face has same length as the one to be created.
* an unrelated fix - the output of a triangle was not being flagged by the bmesh_contextual_create operator.
