Subject:
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Re: Ldglite bug report (Was: Portable Ldraw system)
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Newsgroups:
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lugnet.cad.dev
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Date:
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Fri, 23 Aug 2002 18:12:44 GMT
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Viewed:
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1858 times
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In lugnet.cad.dev, Don Heyse writes:
> In lugnet.cad.dev, Jeremy H. Sproat writes:
> > Speaking of lines, when I use -W20 the ends of each line segment is capped
> > by a square which is the same color as the line but 2 or 3 times as wide.
> > The net result is that pieces with many line segments (curves for example)
> > have a very "spiky" look. Is there any way to smooth these out?
> >
> > I've uploaded a sample to my server: http://www.sproat.us/l3glite-test.png
> >
> > My l3glite command line: l3glite -v640,480 -u6400,4800 -i1 -fh -W20 -q -l3
> > -s13 -o-500,1500 -z-1000 -a1,0,0,0,1,0,0,0,1 model.dat
>
> I'm not sure what I can do about that. Opengl only does flat ended wide
> lines, so I draw the endpoints at what should be the appropriate width
> to smooth them out. Apparently your driver draws the points as squares
> instead of circles. I wonder if this is a common problem. Probably,
> since you're using the generic driver...
Take a look at this thread at OpenGL.org:
http://www.opengl.org/discussion_boards/ubb/Forum3/HTML/006926.html
The short summary is that you apparently can't guarantee it will work on all
cards, but if you set things up right, you can get it to work on most cards.
In addition, it may be that cards that don't work are due to buggy drivers.
There is a post by Niftybitz near the bottom that gives the proper setup
code for round points.
--Travis Cobbs (tcobbs@REMOVE.halibut.com)
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Message is in Reply To:
 | | Re: Ldglite bug report (Was: Portable Ldraw system)
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| (...) I try to think of the -a as a rotation matrix for the model, whereas the -cc stuff is a manipulation of the view matrix. Unfortunately the LDRAW default -a matrix "squishes" the model as if it were a view matrix. I guess this is because the (...) (22 years ago, 23-Aug-02, to lugnet.cad.dev)
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