lisux Posted October 13, 2005 Share Posted October 13, 2005 Hi all. Can anybody explain how the "Compute Dual" option of the divide SOP works? And when for what can i apply it? Thanks. Quote Link to comment Share on other sites More sharing options...
sibarrick Posted October 13, 2005 Share Posted October 13, 2005 It places a point at the center of each poly and then connects them up into a new set of polys. If you apply it to triangulated meshes you get a hexagon/pentagon mesh, if you then apply a second one you get your triangles back, in the process you will have smoothed the shape out somewhat but you won't have change the point/prim count. That's what I use it for, plus an obscure use in my SSS sop. Quote Link to comment Share on other sites More sharing options...
edward Posted October 13, 2005 Share Posted October 13, 2005 As I think (Marc?) said on the mailing list, it also gives you a soccer ball shape when applied to a polygon sphere. At one point I think I might have used the Computer Dual option to do stuff with primitive connectivity because it converts primitives to points. Once you have the points, you can then use the VEX neighbor functions to determine connectivity. Then you can just the same indexing scheme and point it back onto the primitives of your original geometry using $PR as the index into point() expressions. Quote Link to comment Share on other sites More sharing options...
lisux Posted November 2, 2005 Author Share Posted November 2, 2005 Thanks simon and edward, now i undersatnd better the divide SOP Quote Link to comment Share on other sites More sharing options...
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