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add arguments to calculate normals when converting to bmesh:
BM_mesh_bm_from_me, DM_to_bmesh
This gives some speedup to undo (which didnt need to re-calculate vertex normals), and array modifier which doesnt need to calculate face normals at all
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access to these as input arguments and return values.
all output values currently have ".out" suffix, this may go in the future, but for now it makes it clear in C code what are inputs and outputs.
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get return values.
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is to respect hidden geometry.
this is useful for bmesh tools that operate in object mode or for modifiers which would previously use hidden faces in some cases.
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BMEditMesh already stores an object pointer.
also fix for own mistake with mesh conversion refactor, shape key index was off by 1 when switching editmode.
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funcs to ne less confusing.
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- moved mesh conversion functions into their own file.
bmesh py api:
- can now create a new empty bmesh without first creating mesh data.
- added function to copy bmesh data back to a mesh.
- bmesh.from_mesh() can now get a mesh which isnt in editmode.
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also remove large, duplicate comments from sunsky.h
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scons).
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- spelling - turns out we had tessellation spelt wrong all over.
- use \directive for doxy (not @directive)
- remove BLI_sparsemap.h - was from bmesh merge IIRC but entire file commented and not used.
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* double default edge allocation size (double the number of verts/faces).
* CustomData_bmesh_init_pool was using allocsize & chunksize as the same variable. Now use type specific chunk size.
* bmesh copy and editmode conversion now allocate the BMesh mempool size needed for the entire vert/edge/loop/face arrays since its known already.
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also correct bad assert() in previous commit.
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- apply some rules for function naming conventions, added to main bmesh doc in bmesh.h.
- remove unused function BM_loops_to_corners().
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use bmo_* prefix for operator defs, was confusing with bmesh_* api functions.
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* better type safety for BM_elem_flag_* and BM_elem_index_* functions.
* add BMElem type to be used where BMFace/Edge/Vert/Loop can be interchanged.
* fix bug in select manifold, found when making functions more strict.
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New method of vertex shapekey propagation didn't restored coordinates in
me->mvert array which lead to unwanted deformation of basis mesh and
lead to issues like described in the report.
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and also makes existing calls more obvious.
also corrected some error reports.
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