source: GTP/trunk/Lib/Illum/GPUObscurancesGT/src/depth.vert @ 930

uniform float angle;

varying vec3 lightVect;

void main()
{
        vec4 position = gl_Vertex;
        gl_Position = ftransform();
        
        vec3 lightpos;
        lightpos.x = 2.7320508 * cos(angle/50);
        lightpos.y = 2.7320508 * sin(angle/50);
        lightpos.z = 1.0;
        
        position.xyz -= lightpos;
        
        lightVect = position.xyz / 3.4641016;
}