 | | 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>, (...) (20 years ago, 25-Apr-05, to lugnet.cad.dat.parts)
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| | Re: Conditional lines on sloped wedge parts 43720 and 43721 [DAT]
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(...) Looks good. Should we create a new primitive with the next dimensions:? 2 24 0 0 1 0 1 1 2 24 1 0 -1 0 1 -1 2 24 0 0 1 1 0 -1 2 24 0 1 1 0 1 -1 and a POV-quadric version in the coming L3PPARTS. As the outer twisted surface of the parts with (...) (20 years ago, 25-Apr-05, to lugnet.cad.dat.parts)
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| | Re: Conditional lines on sloped wedge parts 43720 and 43721 [DAT]
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(...) Nice, I like the idea of the quadric primitive, but we want to add some curvature to the LDRAW version, right? I fiddled a bit with the part a few days ago, starting with the two triangles outlined by your primitive. I didn't exactly finish, (...) (20 years ago, 25-Apr-05, to lugnet.cad.dat.parts)
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| | Re: Conditional lines on sloped wedge parts 43720 and 43721 [DAT]
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(...) The following are the appropriate conditionals for Don's surface. Playing with it you can have angles where the conditionals seem to go too far, but it's certainly much better than the current ones. (Note that the last 4 conditionals are only (...) (20 years ago, 26-Apr-05, to lugnet.cad.dat.parts)
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| | Re: Conditional lines on sloped wedge parts 43720 and 43721
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(...) Hey, thanks testing it out. You're right about the conditionals zig-zagging a bit. I still have the feeling that if the surface were pinned down to the concave green line those zig-zags would go away. But I couldn't decide whether to divvy it (...) (20 years ago, 26-Apr-05, to lugnet.cad.dat.parts)
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| | Re: Conditional lines on sloped wedge parts 43720 and 43721 [DAT]
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(...) Good idea with a twist primitive (twist.dat ?). Perhaps it would be simpler if it were only in one octant: 2 24 0 0 0 0 0 1 2 24 0 0 1 1 1 1 2 24 1 1 1 0 1 0 2 24 0 1 0 0 0 0 POV code would be: //x - yz = 0 quadric { <0,0,0>, <0,0,-1>, (...) (20 years ago, 27-Apr-05, to lugnet.cad.dat.parts)
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| | Re: Conditional lines on sloped wedge parts 43720 and 43721 [DAT]
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(...) Ok so it's been a few years, but I took another look at this. Did anybody ever make a twist primitive? It appears like all you need to do is something like this. Don 0 Wedge 4 x 2 Sloped Left 0 Name: 43721.dat 0 Author: Donald Sutter 0 (...) (14 years ago, 22-Sep-10, to lugnet.cad.dat.parts)
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| | Re: Conditional lines on sloped wedge parts 43720 and 43721 [DAT]
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(...) Very interesting! (URL) I am not so much comvinced by the improvement for flat shading. Looks like we trade triangular artefacts in one direction with artefacts in the other one. But it drastically improves the very ugly condlines artefacts! (...) (14 years ago, 22-Sep-10, to lugnet.cad.dat.parts, FTX)
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| | Re: Conditional lines on sloped wedge parts 43720 and 43721
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(...) Unfortunately it messes up unless you inlude FTX line breaks, or fixed code box characters (pipe). Unfortunately, both make it harder for people using email or newsreaders, so probably best to do it as you did, browsers can just click "View (...) (14 years ago, 22-Sep-10, to lugnet.cad.dat.parts, FTX)
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