 | | Re: Conditional lines on sloped wedge parts 43720 and 43721
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| (...) I have made a 43720.inc for the test of the coming L3PPARTS. The mathematical description of the surface is: 80x + 40y + yz = 0 and I have used the POV primitive quadric: quadric { <0,0,0>, <0,0,1>, <80,40,0>, 0 clipped_by { box { <-20,0,-40>, (...) (22 years ago, 25-Apr-05, to lugnet.cad.dat.parts)
| | | | | Re: Conditional lines on sloped wedge parts 43720 and 43721
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| (...) I think the key difference is the twisted nature of this surface. I think the twist makes it impossible to partition the surface into polygons without having a mix of convex and concave seams. I'd like to be proven wrong. I don't have one of (...) (22 years ago, 19-Apr-05, to lugnet.cad.dat.parts, FTX)
| | | | | Re: Conditional lines on sloped wedge parts 43720 and 43721
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| (...) Oh, I don't know about that 1 pixel business. The problem with the surface as it's currently written, is that it flip-flops between convex and concave every at every triangle. But if you ignore the triangles and spin the surface around a bit, (...) (22 years ago, 19-Apr-05, to lugnet.cad.dat.parts, FTX)
| | | | | Re: Conditional lines on sloped wedge parts 43720 and 43721
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| (...) I'm pretty sure that's going to be the problem with *any* partition of this surface into polygons. Having a mathematical description of the surface would be good, because then we could potentially create a primitive for the surface, and (...) (22 years ago, 19-Apr-05, to lugnet.cad.dat.parts, FTX)
| | | | | Re: Conditional lines on sloped wedge parts 43720 and 43721
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| (...) OK, I tried it and realise now that it doesn't solve the problem at all, just moves the outside curves to a different spot. I think Don is right, a more complex torus-like curve is necessary to represent it properly. ROSCO (22 years ago, 18-Apr-05, to lugnet.cad.dat.parts, FTX)
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