 | | Dat format question - Quad line order
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Hi all, I've read the LDraw FAQ relating to the .dat file format. Specifically: --BEGIN-FAQ-- Quadrilateral command. Draws a four-sided, filled shape between four points. Line format: 4 colour x1 y1 z1 x2 y2 z2 x3 y3 z3 x4 y4 z4 where colour is a (...) (25 years ago, 22-Dec-99, to lugnet.cad.dev)
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| | Re: Dat format question - Quad line order
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(...) You are correct that the co-ordinates _should_ define a simple loop without crossing. The rendering algorithm in the original LDraw program was not sensitive to this, so errors crept into the parts files. There was a move some time back to (...) (25 years ago, 22-Dec-99, to lugnet.cad.dev)
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| | Re: Dat format question - Quad line order
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"Johannes Keukelaar" <johannes@nada.kth.se> wrote... (...) Yes. (...) It is known as a bow-tie quad, and is found many places! (...) Yes, this is sadly the way they are ordered in many files. Another problem is that the four points may not be (...) (25 years ago, 22-Dec-99, to lugnet.cad.dev)
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