[LWJGL] Cant Figure Out How To Do Frustum Culling

OpenGL Development
#1

Hello JGO!

I need some help. I’m trying to implement frustum culling into my game but i cant seem to figure out how to do it.
Ive searched all around and cant find a any thing telling you how to do it. I understand you have to multiply your projection and model view matrices together, And then extract the frustum planes some how? I really don’t know.

Thanks a bunch :slight_smile:

#2

Libgdx has already implemented this for you. Just call camera.sphereInFrustum() (also works with points and other things) This will return your Boolean value.

#3

He’s using LWJGL. I had issues with frustum culling as well. I would share my method but its riddled with odd code. (It’s only temporary until I figure out a better way.)

Try this:
https://code.google.com/p/exemplwjgl/source/browse/trunk/src/fcampos/rawengine3D/graficos/Frustum.java?r=40

I learned a lot from that one

#4

Whoops! I read Libgdx for some reason :wink:

#5

Thanks KudoDEV For the link! I tried to make a implementation using it, But the pointInFrustum() Method is always returning false.
Do you know whats wrong?

My Code: http://pastebin.java-gaming.org/8c3850c73171d

Thanks.

#6

Never mind, I found the mistake. Thank you vary much for your help! :slight_smile:

#7

I know you already have your answer but here is a good tutorial series on frustrum culling and the various collision algorithms

http://www.lighthouse3d.com/tutorials/view-frustum-culling/index/

A good read to find out what your culling algorithm and frustrum shape creation code is doing

#8

And what was the problem Robo11?

#9

How likely do you think it is that, having not logged in for almost two years now, @Robo11 will remember even the problem he had over three years ago, let alone the solution? (rhetorical question)

#10

I use org.joml.FrustumIntersection, very convenient.

#11

Maybe he thought robots can remember everything…