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multiple display lists ??

Started by Kincaid Jan 5, 2009 at 3:34 AM 2 replies 1k views

Original Post

Jan 5, 2009 at 3:34 AM

Hello, I have a mesh, which needs to be divided in the front and back facing polygons. (to build (part of)a shadow volume) I build the volume by looping all vertices twice. once compiled into a front facing display list, and once for the back. (so i can simply call either one when needed again) Is it possible to start 2 or more display lists, and based on the result of some test, render to either one. That way I could only cycle once (instead of twice, saving a lto), rendering both display lists at once.. i guess this is impossible and a stupid question...still curious though... thanx in advance

kittycat768

Jan 5, 2009 at 7:49 PM

At the risk of sounding ignorant... Have you tried playing around with glCullFace() and glFrontFace()?

UnIXbLueStar

Jan 7, 2009 at 8:50 PM

i dont think you can use glNewList while one is already opened but you can call a list inside a display list :).

If you call glNewList while theres no list opened then yes you can have many.

fcoelho

Jan 7, 2009 at 9:46 PM

OpenGL man pages

Quote:

GL_INVALID_OPERATION is generated if glEndList is called without a preceding glNewList, or if glNewList is called while a display list is being defined.

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