#81 Subdivision Surface UV's incorrect

It seems Pixie has problems with SDS UV coordinates in certain situations, here are some example pictures and a screen grab of the original UV:

UV screen grab - http://www.dreamscapearts.com/Public/UVscreengrab.jpg
3Delight result - http://www.dreamscapearts.com/Public/3delight.jpg
Aqsis result - http://www.dreamscapearts.com/Public/aqsis.jpg
Pixie result - http://www.dreamscapearts.com/Public/pixie.jpg

Also if it helps heres the test project files setup as SD S and Polygons with renders and screengrabs for comparison.
http://www.dreamscapearts.com/Public/UVTest.zip

I have no clue whats causing it but it appears that sometimes they are correct and sometimes they are not depending on the geometry?

[Anonymous]

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Forgot to mention I'm using Pixie v2.2.3 SVN Trunk v1147 on Linux ;)

[Cedric PAILLE]

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Hi,

easy to fix, the mesh as degenerated faces, you can change theses lines in subdivisionCreator.cpp line 1912:

// Check for degenerate faces
int val = faces[i]->vertices[j]->valence;
int fval = faces[i]->vertices[j]->fvalence;
if((val == 1)) { warning(CODE_CONSISTENCY,"Subdivision mesh has hanging vertex"); goto skipFace; }
if((val == 2) && (fval != 1)) { warning(CODE_CONSISTENCY,"Subdivision mesh is degenerate (face %d)\n",i); k += faces[i]->numEdges; goto skipFace; }
if((val >= 3) && (fval > val)) { warning(CODE_CONSISTENCY,"Subdivision mesh is degenerate (face %d)\n",i); k += faces[i]->numEdges; goto skipFace; }

Cheers.