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From Odwiki

What it does

The VertexSplitSOP uniques points according to vertex attributes. If the Promote option is specified, the vertex attribute is transformed into a point attribute after the uniquing is complete.

This is a useful operation as one can often have many vertices that refer to the same point. This means one cannot convert a vertex attribute losslessly to a point attribute. The best example of this is when using vertex attributes for texturing. One will often have a seam on one's model. The VertexSplitSOP allows one to unroll the seam while leaving the rest of the model intact.

One use for the VertexSplitSOP is to ensure that the result of a TriStripSOP does not cross a vertex seam. Example

1. Place a TubeSOP
   • Type, set to Polygon
2. Place a UVTextureSOP
   • Texture Type, set as Cylindrical
   • Fix Boundary Seams, set as On
   • Turn on VertexTextureDisplay and note the doubling of UV coordinates on the seam.
3. Place a VertexSplitSOP
   • Attribute, set as uv
   • Turn on PointNumberDisplay and note that the seam points have been uniqued.

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