Subject:
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Re: Bricksmith 2.4: Faster. Much Faster.
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Newsgroups:
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lugnet.cad.dev.mac
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Date:
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Wed, 16 Jun 2010 16:38:48 GMT
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Viewed:
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35136 times
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In lugnet.cad.dev.mac, Don Heyse wrote:
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In lugnet.cad.dev.mac, Remi Gagne wrote:
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In lugnet.cad.dev.mac, Allen Smith wrote:
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By the way, Bricksmith does not render conditional lines. I consider
shading to be a sufficient substitute, and conditional lines sound
difficult to optimize.
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Heh, you hit that problem too? I’ve played around writing an OpenGL LDraw
renderer based exclusively on display lists, but I can’t for the life of me
figure out how to handle conditional lines in this setup. Has anyone else
solved this peculiarly specific problem?
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You can ignore the conditional lines and achieve the same effect with
display lists using the stencil buffer techniques presented here:
http://www.opengl.org/resources/code/samples/sig99/advanced99/notes/node108.html
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And here’s a silhouette technique using BFC:
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.71.8503&rep=rep1&type=pdf
This technique and the conditional lines both target the same edges lines
where the front facing polygons meet the back facing polygons, so the
results should be quite similar.
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Message has 1 Reply:
 | | Re: Bricksmith 2.4: Faster. Much Faster.
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| (...) And another thing... The BFC technique actually has an advantage over conditional lines because it works on the entire scene after it's been assembled. Whereas the conditional lines at the edges of the primitives are created in advance, and (...) (14 years ago, 16-Jun-10, to lugnet.cad.dev.mac, lugnet.cad.dev, FTX)
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