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[DAT] (requires LDraw-compatible viewer)
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Subject:
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Re: Collinear vertices warning on very small triangels
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Newsgroups:
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lugnet.cad.dat.parts
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Date:
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Sun, 27 Feb 2005 16:50:19 GMT
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Viewed:
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3418 times
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In lugnet.cad.dat.parts, Ross Crawford wrote:
> In lugnet.cad.dat.parts, Willy Tschager wrote:
> > hi lars,
> >
> > I get L3P collinear vertices warning on these very small triangels:
>
> Hi Willy, there was a thread about that recently, coincidentally someone else
> named Will :) http://news.lugnet.com/cad/dev/?n=10023
hi rosco,
thx for pointing. interesting thread. even after so many years I still find out
something new (that's why I love LDraw :-) L3Lab and L3p share code ... hmmm ...
L3Lab does not draw concave quads like this:
4 4 0.603 19.885 1.569 0.902 19.803 1.569 0.294 19.935 1.569 1.348 23.306 1.569
4 4 1.962 19.146 1.569 2.19 18.899 1.569 1.718 19.357 1.569 4.658 22.467 1.569
4 4 3.365 15.157 1.569 3.413 14.491 1.569 3.302 15.76 1.569 8.689 15.058 1.569
4 4 3.46 10.85 1.569 8.857 11.827 1.569 8.844 11.056 1.569 8.806 10.292 1.569
but you won't get any warning when checking with L3P. you will have to use
LDView to find out what's wrong:
Concave quad split into two triangles.
File: C:\...\Concave.dat
Line #7
Line: 4 4 0.603 19.885 1.569 0.902 19.803 1.569 0.294 19.935 1.569 1.348 23.306 1.569
Original Quad: <0.603 19.9 1.57> <0.902 19.8 1.57> <0.294 19.9 1.57> <1.35 23.3
1.57>
Triangle 1: <0.603 19.9 1.57> <0.902 19.8 1.57> <1.35 23.3 1.57>
Triangle 2: <0.902 19.8 1.57> <0.294 19.9 1.57> <1.35 23.3 1.57>
lars, will "concave-checking" be part of the new L3P version?
w.
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