[Bf-committers] New BMesh API to set normals

[Howard Trickey]

Bastien, was your BMesh custom normal addition committed? I can't seem to
find it.

On Tue, Jun 7, 2016 at 4:31 PM Howard Trickey <howard.trickey at gmail.com>
wrote:

> Wonderful! Thanks for the very quick work, Bastien.
>
> On Tue, Jun 7, 2016, 4:17 PM Bastien Montagne <montagne29 at wanadoo.fr>
> wrote:
>
>> Hi devs,
>>
>> Today Howard requested the ability to set custom normals in BMesh (Edit
>> mode tools). While we are far from ready to have a real normal editing
>> feature/mode/whatever in Edit mode currently, I made a quick port of
>> BKE_mesh_evaluate code to set normals, in the new `custom-normals-bmesh`
>> branch for now.
>>
>> As with non-bmesh code, currently you can only set all normals (either
>> per-loop or per-vertex) at once, since this is not a cheap operation.
>>
>> Also added a python bmesh.utils.custom_normals_set() api func, at least
>> to allow easy testing of the feature, e.g. with default cube in Edit mode:
>>
>>  >>> import bmesh
>>  >>> bm = bmesh.from_edit_mesh(C.edit_object.data)
>>  >>> nors = sum(zip(((0, 0, 1),) * 4, (None,) * 4), ())  # Produces an
>> 8-items tuples of Z-up vectors and None's
>>  >>> # Set those vertex custom normals into bm, 'None' ones keeping
>> default auto-computed normals.
>>  >>> bmesh.utils.custom_normals_set(bm, nors)
>> ((0.0, 0.0, 1.0), (0.5773502588272095, -0.577350378036499,
>> -0.5773503184318542), (0.0, 0.0, 1.0), (-0.5773501396179199,
>> 0.5773504972457886, -0.5773503184318542), (0.0, 0.0, 1.0),
>> (0.5773500204086304, -0.5773505568504333, 0.5773503184318542), (0.0,
>> 0.0, 1.0), (-0.5773501992225647, 0.5773503184318542, 0.5773503184318542))
>>
>> Testing and feedback is most welcome!
>>
>> Cheers,
>> Bastien
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>