vsm glhck shader

gistfile1.c

Basic VSM shadow mapping shader

-- GLhck.DepthRender.Unpacking.Fragment
void main() {
   float Depth = glhckUnpackHalf(texture2D(GlhckTexture0, GlhckFUV0).st);
   GlhckFragColor = vec4(Depth, Depth, Depth, 1.0);
}

-- GLhck.Depth.Packing.Fragment
void main() {
   const float Near = 5.0;
   const float Far  = 250.0;
   const float LinearDepthConstant = 1.0/(Far - Near);
   float LinearDepth = length(GlhckFVertexLightView) * LinearDepthConstant;

   float Moment1 = LinearDepth;
   float Moment2 = Moment1 * Moment1;
   GlhckFragColor = vec4(glhckPackHalf(Moment1), glhckPackHalf(Moment2));
}

-- GLhck.Lighting.ShadowMapping.Unpacking.Fragment
uniform sampler2D ShadowMap;

void main() {
   vec4 Diffuse = texture2D(GlhckTexture0, GlhckFUV0.st) * GlhckMaterial.Diffuse/255.0;
   GlhckFragColor = clamp(vec4(glhckLighting(Diffuse.rgb) * glhckShadow(ShadowMap), Diffuse.a), 0.0, 1.0);
}