Correct way to specify per-vertex color in an FbxMesh

[Anonymous]

Hi all,

Does anybody know the best way of storing per-vertex diffuse color data in a mesh? I've seen the FbxGeometryElementVertexColor class and followed the code in the Layers SDK sample, but nothing seems to show up correctly when looking at the file in FBX Review.

Unless I'm mistaken, in the Layers sample code the colors that appear on each face of the cube are generated by creating a separate material on each face. If I change to code to  create a single material over the entire mesh then the FbxGeometryElementVertexColor element doesn't seem to do anything.

Is there really no way of creating a single material with per-vertex variation of the diffuse component?

Many thanks,

Simon

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[Anonymous]

I had to define 3 colors per polygon in my model.

  
  '--------------------------------------------------------------------------
  If _group(id).header.Contains("iii") Then ' This model has vertexColors?
        Dim colorLayer1 As FbxLayerElementVertexColor = Nothing
            colorLayer1 = FbxLayerElementVertexColor.Create(myMesh, "VertexColor")
            colorLayer1.Name = "VertexColor"
            colorLayer1.Mapping_Mode = FbxLayerElement.MappingMode.ByControlPoint
            colorLayer1.Reference_Mode = FbxLayerElement.ReferenceMode.Direct
            Dim color As New FbxColor
            For I = 1 To _group(id).nPrimitives_
                Dim indi = _group(id).indicies(I)
                color.Red = CDbl(_group(id).vertices(indi.v1).index_1 / 255) 'convert to double
                color.Green = CDbl(_group(id).vertices(indi.v1).index_2 / 255)
                color.Blue = CDbl(_group(id).vertices(indi.v1).index_3 / 255)
                color.Alpha = 1.0 'CDbl(_group(id).vertices(I).index_4 / 255)
                colorLayer1.DirectArray.Add(color) ' add color to layer

                color.Red = CDbl(_group(id).vertices(indi.v2).index_1 / 255)
                color.Green = CDbl(_group(id).vertices(indi.v2).index_2 / 255)
                color.Blue = CDbl(_group(id).vertices(indi.v2).index_3 / 255)
                color.Alpha = 1.0 'CDbl(_group(id).vertices(I).index_4 / 255)
                colorLayer1.DirectArray.Add(color)

                color.Red = CDbl(_group(id).vertices(indi.v3).index_1 / 255)
                color.Green = CDbl(_group(id).vertices(indi.v3).index_2 / 255)
                color.Blue = CDbl(_group(id).vertices(indi.v3).index_3 / 255)
                color.Alpha = 1.0 'CDbl(_group(id).vertices(I).index_4 / 255)
                colorLayer1.DirectArray.Add(color)
            Next

        layer.VertexColors = colorLayer1
   End If 
   '--------------------------------------------------------------------------