Teeth

Teeth is a special shader used specifically for the teeth in Half-Life 2. It is used to dynamically adjust the brightness of the teeth based on how open the mouth is.

Note:This shader is likey obsolete, as Valve hasn't used it for any of their recent games. Instead, they include teeth on their facemaps, using the shader VertexLitGeneric.

Todo: Add an image showing the teeth.

Parameters

$basetexture <texture>

Texture for the teeth.

$halflambert <bool>

Enables half-lambertian lighting. Default 1.

$clientshader "MouthShader"

Todo: What does this actually do?

$illumfactor <float>

Modifies the amount the teeth are brightened or darkened by. Default 1.

$forward <vector>

Forward direction vector for teeth lighting. Default "[1 0 0]".

$bumpmap <texture> (DX9 SM2)

Bumpmap for the teeth. Enables phong specular, and uses the alpha channel of the bumpmap as a mask if present.

$phongexponent <float> (DX9 SM2)

Exponent for the specular. Overrides the bumpmap's alpha mask if one is present. Default 100.

Other parameters

$intro <bool>

Teeth are used on a model in Episode 1's intro cutscene. Adds another shader pass.

$warpparam <float>

Requires $intro 1. How far into the warp animation we are.

$entityorigin <vector3>

Requires $intro 1. World-space location of the entity, required to correctly animate the warp.