MFnMesh::getTriangles doesn't return actual components like faces, it
returns the triangles that Maya used to render the mesh. e.g. a
single quad face has 4 vertices, and Maya has to turn that into two
triangles to render. This function will tell you what vertices it
used to make up those triangles. If you go to Display -> Polygons ->
Face Triangles then you can see them displayed in the viewport. The
"fake" edges Maya used to make up the triangles will be rendered in a
dashed line.
On Wed, Jul 28, 2021 at 6:05 PM Alejandro <voidrea...@gmail.com> wrote:
>
> Hello people !
>
> I've been trying to store faces from combined objects using getTriangles
> method, but I think I'm using it wrong..
>
> to reproduce the issue, duplicate a sphere, move it a little so you can see,
> and combine it into a single object, name it as "combined_mesh" then:
>
> ```
> sel = OpenMayaApi.MSelectionList()
> sel.add("combined_mesh")
>
> _dag = sel.getDagPath(0)
> _mesh = OpenMayaApi.MFnMesh(_dag)
>
> _, triangles_idx = _mesh.getTriangles()
>
> _, mObject = sel.getComponent(0)
> mfn_components = OpenMayaApi.MFnSingleIndexedComponent(mObject)
> mfn_object = mfn_components.create(OpenMayaApi.MFn.kMeshPolygonComponent)
> mfn_components.addElements(triangles_idx)
>
> selection_list = OpenMayaApi.MSelectionList()
> selection_list.add((_dag, mfn_object))
>
> OpenMayaApi.MGlobal.setActiveSelectionList(selection_list)
> ```
>
> thanks guys.
>
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