Subject:
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Re: LDDP current version - BUG?
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Newsgroups:
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lugnet.cad
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Date:
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Sun, 31 May 2009 17:48:48 GMT
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Viewed:
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8263 times
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In lugnet.cad, Michael Heidemann wrote:
> In lugnet.cad, Orion Pobursky wrote:
> > In lugnet.cad, Michael Heidemann wrote:
> > > I just came across the following problem.
> > > For part http://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/3069bpb1.dat LDDP
> > > generate 2 error regarding planarity.
> > > Planarcheck does not.
> > >
> > > Anybody with similar experience?
> >
> > I just checked this part. The 2 lines in question look to be concave in LDView.
> >
> > -Orion
>
> I just checked an LDView reports concave quads. Can somebody explain that to me,
> as I believed it can be checked with planarcheck, but co-planarity is ok.
Concave is not the same as co-planer. Co-planarity checks to see if all the
points in the quad lie on the same plane (with in some tolerance). You can have
a co-planer, concave quad.
> One other thing.
> At part http://www.ldraw.org/cgi-bin/ptdetail.cgi?f=parts/s/2859s01.dat LDDP
> does not find any double lines. But there are double lines.
> 2 24 155.00 -5.50 -41.00 155.00 -5.50 -27.00
> 2 24 155.00 -5.50 -27.00 155.00 -5.50 -41.00
> These two lines seems to me identical.
> Also LDView does not report them!
Those are illegal type 2 lines as they have 3 points defined instead of 2.
Right now, LDDP just ignores illegal lines and doesn't complain about them.
-Orion
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Message has 1 Reply:
 | | Re: LDDP current version - BUG?
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| (...) I don't think so, as the official document ((URL) reads like this: Line Type 2 Line type 2 is a line drawn between two points. The generic format is: 2 <colour> x1 y1 z1 x2 y2 z2 Where: * <colour> is a number representing the colour of the (...) (15 years ago, 31-May-09, to lugnet.cad)
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Message is in Reply To:
| | Re: LDDP current version - BUG? [DAT]
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| (...) I just checked an LDView reports concave quads. Can somebody explain that to me, as I believed it can be checked with planarcheck, but co-planarity is ok. One other thing. At part (URL) LDDP does not find any double lines. But there are double (...) (15 years ago, 31-May-09, to lugnet.cad)
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