[Bf-python] BMesh upgrade docs & api info

[Campbell Barton]

The selection was totally wrong, removed now in svn. Ill need to
investigate your other question further.

On Mon, Apr 23, 2012 at 9:23 PM, Matt Ebb <matt at mke3.net> wrote:
> Thanks for your help, Campbell - some responses below.
>
> On Mon, Apr 23, 2012 at 10:42 AM, Campbell Barton <ideasman42 at gmail.com> wrote:
>>> At the moment I'm assuming that a UV Map contains the link to a
>>> per-face image, but it also seems to contain a weird collection of 4
>>> 'UV Selected' properties, that I can't figure out what on earth
>>> they're for. The names of UV Maps also seem to correlate with what's
>>> in the UI.
>>
>> I don't follow, which selected properties are these?
>
> These: http://www.pasteall.org/pic/30646
>
>>> * Poking in the python console, I see that mesh.uv_loop_layers has an
>>> 'active' property, that's not displayed in the UI in datablocks mode
>>> (why?). This seems to get me the active layer selected in the UI.
>>
>> Because it sync's with the uv_texture.active layer... eeh, this should
>> be documented too.
>>
>>> * UV Loop layers seem to contain the UV coordinates themselves (a uv
>>> pair for each per-face-vertex 'loop') inside 'data', but I can't see
>>> how to relate those to the UV Maps shown in the UI. When I iterate
>>> over the uv loop layers (eg. [l for l in mesh.uv_loop_layers] ) it
>>> gives me names like: bpy.data.meshes['Cube'].uv_loop_layer["UV
>>> coord"]. These names are not visible in the datablocks view, and do
>>> not seem to correspond to the names in the 'UV Maps' in the UI.
>>
>> Hope the example helps here.
>
> Not really, I'm afraid. I understand the indices of MeshUVLoop data
> are equivalent between mesh geo loops, vertex colour loops, etc. (good
> to this this documented for certain now, though!).
>
> The issue I'm having is retrieving UV Loop Layers by name, not just
> the active one. I'm talking about the layers themselves, not the loop
> items inside them. It's only the UV Map names that are exposed in the
> UI, and the MeshUVLoopLayer names don't correspond to those names in
> the UI. So far I'm going on the assumption that UV Maps and UV Loop
> Layers are ordered identically, so my code looks like:
>
>    if name == "":
>        uv_loop_layer = mesh.uv_loop_layers.active
>    else:
>        # assuming uv loop layers and uv textures share identical indices
>        idx = [i for i, uvtex in enumerate(mesh.uv_textures) if
> uvtex.name == name][0]
>        uv_loop_layer = mesh.uv_loop_layers[idx]
>
> This seems to work ok, but it would be good to have clarification that
> this is the right way to access UV Loop Layers by name. Perhaps it
> would be simpler if the UV Loops Layers just shared names with UV
> Maps? :)
>
> thanks very much,
>
> Matt
> _______________________________________________
> Bf-python mailing list
> Bf-python at blender.org
> http://lists.blender.org/mailman/listinfo/bf-python



-- 
- Campbell