Facevarying data for subdivision surface

[Nicholas Yue]

Hi,

  I am writing a RIB export plugin for the ManifoldLab project (Java base subdivision texturing tool).

  I use "facevarying" color for the Subdiv mesh, it renders fine with PRMan, Aqsis and 3Delight.

  I would like to use Pixie but was unable to get a render with "facevarying" data.

Cheers

[Okan Arikan]

   Hi Nicholas,

   Pixie supports facevarying data for subdivision surfaces. If you're getting errors, this is probably a bug. Can you send me a RIB file that screws up ?

   Thanks

   Okan

[Nicholas Yue]

##RenderMan RIB
version 3.04
Display "varying.tif" "framebuffer" "rgb"
Projection "perspective" "fov" [45]
Format 640 480 1
PixelSamples 4 4
WorldBegin
AttributeBegin
AttributeBegin
Translate -2 2 8
Declare "Cs" "facevarying color"
SubdivisionMesh "catmull-clark" [4 4 4 4] [0 1 4 3 1 2 5 4 3 4 7 6 4 5 8 7] ["interpolateboundary"] [0 0] [] [] "P" [-1 1 0
0 1 0 1 1 0 -1 0 0 0 0 0
1 0 0 -1 -1 0 0 -1 0 1 -1 0]"Cs" [1 1 0 0 1 0 1 1 0 1 0 0
0 0 0 1 0 0 1 1 0 0 1 0
1 1 0 1 0 0 1 1 0 0 1 0
0 0 0 1 0 0 1 1 0 0 1 0]
AttributeEnd
AttributeBegin
Translate 2 -2 8
SubdivisionMesh "catmull-clark" [4 4 4 4] [0 1 4 3 1 2 5 4 3 4 7 6 4 5 8 7] ["interpolateboundary"] [0 0] [] [] "P" [-1 1 0
0 1 0 1 1 0 -1 0 0 0 0 0
1 0 0 -1 -1 0 0 -1 0 1 -1 0]"Cs" [1 1 0 0 1 0 1 1 0 1 0 0
0 0 0 1 0 0 1 1 0 0 1 0
1 1 0 1 0 0 1 1 0 0 1 0
0 0 0 1 0 0 1 1 0 0 1 0]
AttributeEnd
AttributeEnd
WorldEnd

[George Harker]

The default shader is a little quick and dirty in it's treatment of data.  Please explicitly attach something like matte to the surface.  You should see facevarying color coming through,

Cheers

George