Frustum plane extraction in OpenGL

STORM76 · 2005-10-30T01:26:24

Hi there, I got stuck with my frustum culling code in my little OpenGL 3D engine project for a while now and would like to ask if someone can provide me with a working excerpt of frustum plane extraction code in OpenGL. I am a little bit confused on the input matrix whether it should be a combination of the projection and modelview matrix or just the modelview matrix and so on. That would be great:-) Thanks in advance, Guido

Graphics and GPU Programming Programming OpenGL

Started by STORM76 October 10, 2005 07:27 AM

12 comments, last by Zakwayda 18 years, 5 months ago

The Rug

628

October 10, 2005 01:40 PM

It's definitely OpenGL- it's basically an expansion of what Visage posted.

the rug - funpowered.com

Zakwayda

2,389

October 10, 2005 05:29 PM

@The OP: At first glance it does look like your matrix indices are the transpose of what they should be. Also, as has been noted it should be projection*modelview, not modelview*projection.

TheSteve

136

October 30, 2005 01:19 AM

Quote:Original post by STORM76

I received the plane extraction code from a white paper from Gil Gribb (Ravensoft) and Klaus Hartmann (title: "Fast Extraction of Viewing Frustum Planes from the World-View-Projection Matrix"). I debugged already the code for a simple point-intersection test and found out that the near plane may be the problem. I use the following code to classify a point:

Cool stuff

Anybody know where this is now? The article seems to be dead linked on raven's site.

Zakwayda

2,389

October 30, 2005 01:26 AM

Quote:Anybody know where this is now? The article seems to be dead linked on raven's site.

Here.

Frustum plane extraction in OpenGL

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Frustum plane extraction in OpenGL

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