Subject:
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Re: Why Type 5 Lines?
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Newsgroups:
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lugnet.cad.dev
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Date:
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Wed, 17 Apr 2002 23:46:11 GMT
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Viewed:
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401 times
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In lugnet.cad.dev, Kyle McDonald writes:
> Well, I believe that there is something called a 'Z offset' that can
> be used not to actually move the geometry, but to make sure the lines
> appear 'on top' of the faces.
OpenGL has glPolygonOffset, which does what you describe by allowing you to
move the polygons further away in the Z direction, where the amount they
move can depend on the slope of the polygon in the Z direction. This works
great, and I use it in LDView when type 2 lines are enabled.
I think based on your comments further down that Java3D is actually doing
something relatively complicated, though. I don't think there are any
features of OpenGL that give you outlines nearly for free. I'll look back
at the wireframe mode setup again, though.
--Travis Cobbs (tcobbs@REMOVE.halibut.com)
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Message is in Reply To:
 | | Re: Why Type 5 Lines?
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| (...) Well, I believe that there is something called a 'Z offset' that can be used not to actually move the geometry, but to make sure the lines appear 'on top' of the faces. Before I go more into this I need to back up a bit. I currently use the (...) (22 years ago, 17-Apr-02, to lugnet.cad.dev)
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