Collada export : 'Triangulate' option generates 'Polygon' primitive type #37781

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bob morane · 2013-12-11T22:34:11+01:00

bob morane commented

2013-12-11 22:34:11 +01:00

System Information
windows 7 / 660ti

Blender Version
Broken: Blender 2.69

'Triangulate' option of the collada exporter generates 'Polygon' primitive type.

Create a grid, in 'edit mode' converts face to triangles.
Export the selection with 'triangulate' check box enabled.

In the .dae file, observe that the primitive type of the grid is not 'TRIANGLES' but 'POLYGONS' ( polylist + vcount )

      <polylist count="2">
        <input semantic="VERTEX" source="#Plane-mesh-vertices" offset="0"/>
        <input semantic="NORMAL" source="#Plane-mesh-normals" offset="1"/>
        <vcount>3 3 </vcount>
        <p>1 0 0 0 2 0 3 1 1 1 2 1</p>
      </polylist>

**System Information** windows 7 / 660ti **Blender Version** Broken: Blender 2.69 'Triangulate' option of the collada exporter generates 'Polygon' primitive type. Create a grid, in 'edit mode' converts face to triangles. Export the selection with 'triangulate' check box enabled. In the .dae file, observe that the primitive type of the grid is not 'TRIANGLES' but 'POLYGONS' ( polylist + vcount ) ``` <polylist count="2"> <input semantic="VERTEX" source="#Plane-mesh-vertices" offset="0"/> <input semantic="NORMAL" source="#Plane-mesh-normals" offset="1"/> <vcount>3 3 </vcount> <p>1 0 0 0 2 0 3 1 1 1 2 1</p> </polylist>

bob morane commented

2013-12-11 22:34:11 +01:00

Changed status to: 'Open'

bob morane commented

2013-12-11 22:34:11 +01:00

Added subscriber: @MaxDaniels

Gaia Clary was assigned by Brecht Van Lommel

2013-12-12 04:30:34 +01:00

Brecht Van Lommel commented

2013-12-12 04:37:54 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2013-12-12 04:37:54 +01:00

I'm not sure if this should be considered a bug, the option is to triangulate the mesh, which it does. Some importers may prefer to have it as a triangles primitive, others may prefer the existing behavior where it always exports a polylist, but both seem correct to me.

Can you explain why you want it to export as a triangles primitive?

I'm not sure if this should be considered a bug, the option is to triangulate the mesh, which it does. Some importers may prefer to have it as a triangles primitive, others may prefer the existing behavior where it always exports a polylist, but both seem correct to me. Can you explain why you want it to export as a triangles primitive?

bob morane commented

2013-12-12 14:52:31 +01:00

my importer supports only triangle primitives.

I think the triangulation of the meshes should be done with the "ctrl+T'
command, and the 'triangulate' option of the exporter should be used to
select if we want polygons or triangles inside the .dae ( and triangulates
the meshes if not yet done ).

regards.

my importer supports only triangle primitives. I think the triangulation of the meshes should be done with the "ctrl+T' command, and the 'triangulate' option of the exporter should be used to select if we want polygons or triangles inside the .dae ( and triangulates the meshes if not yet done ). regards.

Campbell Barton commented

2013-12-13 19:02:37 +01:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2013-12-13 19:02:37 +01:00

Campbell Barton commented

2013-12-13 19:02:37 +01:00

Added subscriber: @ideasman42

Campbell Barton commented

2013-12-13 19:02:37 +01:00

Triangle support could be added but this isn't a bug in Blender.

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Collada export : 'Triangulate' option generates 'Polygon' primitive type #37781