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Drag0n
10-09-2001, 08:00 AM
Is there a way around the limit of 7 (or 8) light sources in OpenGL? Using Windows...

Thx
Drag0n

Bob
10-09-2001, 09:06 AM
Get an implementation that supports more than 8 lights. If you can't find one, then download MESA, chanage the source and recompile.

... or, do the lighting calculations yourself.

Fredy
10-09-2001, 10:55 AM
http://developer.nvidia.com/view.asp?IO=Lights_Demo

Selva
10-09-2001, 11:46 AM
my GL.h says this.

#define GL_MAX_LIGHTS 0x0D31

Does this mean allowed lights in system is
3377?

DFrey
10-09-2001, 01:20 PM
No, that is simply the value of the token GL_MAX_LIGHTS. You pass that to glGet to get the maximum number of lights.

ShiningKnight
10-09-2001, 04:13 PM
Cross-posting eh? Hehe, I just responded to the same question on Gamedev.net... http://www.gamedev.net/community/forums/topic.asp?topic_id=62752

Drag0n
10-10-2001, 01:37 AM
Originally posted by ShiningKnight:
Cross-posting eh? Hehe, I just responded to the same question on Gamedev.net... http://www.gamedev.net/community/forums/topic.asp?topic_id=62752

http://www.opengl.org/discussion_boards/ubb/biggrin.gif

That might be because I asked the same questiong twice...

Thx anyway...
Drag0n

Rob The Bloke
10-10-2001, 08:13 AM
You could probably blag it by drawing the scene a few times and using blending :

Disable your eight lights

Enable blending

Enable another 8 lights

Redraw.

Disable blending

swap buffers

Lighting is an additive process.....

alternatively look towards using light mapping .....

marcus256
10-11-2001, 03:50 AM
You very seldom need more than 5-6 lights lighting a single surface => it pretty quikly gets totally white.

Try using some per-object based dynamic ligtht source enabling/disabling, based on:

A) distance to the light source
B) light source position relative to the object and the viewer (if it's "behind" the object from a certain viewpoint, its effect will never be seen by the viewer)

This way you will not only solve your problem, but you will most likely gain speed aswell.

/Marcus