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Re: [Gnu3dkit-dev] G3DBezier follow-up


From: Brent Gulanowski
Subject: Re: [Gnu3dkit-dev] G3DBezier follow-up
Date: Fri, 18 Oct 2002 19:29:08 -0400

On Wednesday, October 16, 2002, at 12:35 PM, Philippe C.D. Robert wrote:


On Tuesday, October 15, 2002, at 06:06  Uhr, Brent Gulanowski wrote:
Another question that I hope isn't idiotic, but how does one make use of a G3DBezier object? I mean, how could one draw one? Will we create some more G3DGeometryExtensions that will allow us to produce tesselated/submissible versions of the bezier, plane, sphere, line and other such mathematical objects in some form suitable for OpenGL? Actually, extensions alone might not be enough -- although I guess we could have something which returns a vertex array simplification.

I am not sure myself ..:-) This object was mainly written by Frederic Chauvin, I am not sure why he wanted to have it initially. I never really used it in a project...

Since OpenGL has support for NURBS (through GLU), would that route be worth considering? Or would we want to provide our own code? I'm making the hopefully not absurd assumption that we are hoping to draw Bezier and related curves. But perhaps the intention is to leave this up to individual users.

We should consider adding a powerful but simple to use mesh class (a subclass of G3DGeometry in the RK), but we should also avoid using > GLU!

Sure, fair enough, so if want to be thorough, we could either work with evaluators directly, or tessellate ourselves (like I was first thinking), or even do both if we want to be clever. At this point I am NOT qualified, but I've got a bezier section coming up in graphics class, so I may one day have the power.

--
Brent Gulanowski                                address@hidden

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