13 replies to this topic

[KwamiMatrix]

Just wondering, does anyone know how the blue Quad Damage lighting was done in Quake 3?

[mutex]

I assume just a bluish light glow, if you''re referring to the glow around your player.

If you''re talking about the bluish see-through texture on the weapons and such, it''s probably just a slightly-enlarged model rendered with a blue texture with alpha-blending

[KwamiMatrix]

I see. I have to study my OpenGL lighting functions carefully to see if I can create something like that. I like the blue glow of the quad damage light.

Edem Attiogbe

[Golthar]

Who doesnt?

[Moe]

My guess is that they make a larger scaled model of the character and set the textures to some neat animated texture with specular lighting.

[zedzeek]

im guessing glPolygonOffSet(..)

http://members.xoom.com/myBollux

[KwamiMatrix]

thanks all.

Edem Attiogbe

[Moe]

Thats pretty much the same thing, isn''t it?

[Impossible]

Seems like a scale would be a little bit easier

[Jallen]

They might be using a spherical environment map too, the envmap could consist of mostly blue with some silver strips. This would give it that cool look.

Jason A.
DelphiGL (http://delphigl.cfxweb.net)

[Moe]

I never thought of that. Mind you, it changes when you are just standing there and not moving. Perhaps they are changing the coordinates of the texture/spheremap.

[Jallen]

Could be they are rotating the texture matrix every frame.

Jason A.
DelphiGL (http://delphigl.cfweb.net)

[Maximus]

Quake3''s quad damage effect on models is done through the renderer scripting system "Shaders".

The shader for the quad damage effect is:

powerups/quad
{
deformVertexes wave 100 sin 3 0 0 0
{
map textures/effects/quadmap2.tga
blendfunc GL_ONE GL_ONE
tcGen environment
tcmod rotate 30
//tcMod turb 0 0.2 0 .2
tcmod scroll 1 .1
}
}