Subject:
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autoFAQpost /cad/dat-file_to_ray-traced_image.en.faq
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Newsgroups:
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lugnet.faq
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Date:
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Mon, 12 Jul 1999 23:27:38 GMT
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Viewed:
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1515 times
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Subject: How can I make ray-traced images of LDraw models?
Content-Language: en
Topic-Level: 0
Revision: Jacob Sparre Andersen, 1999-05-14
Location: /cad/ldraw/other_tools/
Comment: Unedited cut from the LDraw FAQ.
<P>
There are two tools for converting LDraw models to the format of the
ray-tracer <A Href="http://www.povray.org/">POV-Ray</A>.
<A Href="http://titan.informatik.uni-bonn.de/%7Euhlmann/">L2p</A> is based
on Lutz Uhlmann's very detailed parts library, LGEO. It is available for DOS
and Linux.
<A Href="http://www.netby.net/Nord/Mandelvej/Hassing/l3p.html">L3p</A> is
based on the LDraw parts library. Only available for DOS.
</P>
<H3><A Href="http://titan.informatik.uni-bonn.de/%7Euhlmann/tutorial.html">Lutz
Uhlmann's LGEO tutorial</A></H3>
<P>
Lutz Uhlmann's LGEO tutorial can be found at
<URL:<A Href="http://titan.informatik.uni-bonn.de/%7Euhlmann/tutorial.html">
http://titan.informatik.uni-bonn.de/%7Euhlmann/tutorial.html</A>>.
</P>
<H3>Jacob's quick recipe for making ray-traced images of LDraw models</H3>
<P>
<OL>
<LI>Convert your LDraw .DAT files to POV-Ray .INC files with L2P:
<Pre>
> l2p -i -v -t -l my_model.dat my_model
</Pre>
It is important that you process sub-models as well, because L2P
simply converts a reference to a .DAT sub-model to a reference to a
.INC sub-model.
<LI>Make a copy of the scene file Lutz has included in the package
(<Code>l2p_test.pov</Code>):
<Pre>
> copy l2p_test.pov my_model.pov
</Pre>
<LI>Edit the fourth line in your new scene file (the one that says:
<Code>#include "l2p_test.inc"</Code>). It should refer to the
.INC file for your model instead:
<Table Border=1 Width="80%">
<TR>
<TD>
<Pre>
#include "lg_color.inc"
#include "lg_defs.inc"
#include "my_model.inc"
</Pre>
</Table>
<LI>Run POV-Ray with the new scene file. This is how I do it in Linux.
There are probably some minor differences when you do it in DOS:
<Pre>
> povray +L/usr/lib/povray/include/ +Llgeo/ +Imy_model.pov
</Pre>
The first <Code>+L</Code> refers to the POV-Ray libraries, the second
<Code>+L</Code> refers to the LGEO library, and the <Code>+I</Code>
refers to the scene file.
</OL>
</P>
<H3>Bram's additions for Win95 users</H3>
<P>
In the windows version instead of writing a long command line, you need to
go to Edit Rendering Settings and add the command line options
(<Code>+L</Code>).
</P>
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