[info-performer] Tessellation - piece2.pfb

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From: Jaroslav Sinecky (sinecky++at++telefonica.net)
Date: 04/15/2004 02:25:59


Hi Alex and All,

I'm glad the previous tessellation problem was solved and will be fixed in
next release (btw. Is there some estimation for the release date?)

To profit that good star is shining I send another case ... it's a torus
surface with trim loop in form of a square but all 4 trim curves are
actually nurbs curves (with control points lying on straight lines). If you
load and tessellate this file in perfly (for example perfly
piece2.pfb.0.05.ctol although changing the chordal precision doesn't seem to
help) and observe well the 3D trim circle with smaller radius, you will see
there is something wrong. Looks like there are triangles that connect two
vertices on the trim curve but with other vertex on the curve existing
between them. I actually see this kind of artifact very often.
Any idea what the problem could be?

Jaroslav

the link to piece2.pfb: http://home.tiscali.cz/pusher/piece2.pfb


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