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VARYING vec3 vNormal;
VARYING vec3 vViewVec;
void AMBIENT_LIGHT()
{
DIFFUSE += TOTAL_AMBIENT_COLOR;
}
void DIRECTIONAL_LIGHT()
{
DIFFUSE += uDiffuse.rgb * LIGHT_COLOR * SHADOW_CONTRIB * vec3(max(0.0, dot(normalize(vNormal), TO_LIGHT_DIR)));
}
void POINT_LIGHT()
{
DIFFUSE += uDiffuse.rgb * LIGHT_COLOR * LIGHT_ATTENUATION * SHADOW_CONTRIB * vec3(max(0.0, dot(normalize(vNormal), TO_LIGHT_DIR)));
}
void SPECULAR_LIGHT()
{
vec3 V = normalize(vViewVec);
vec3 H = normalize(V + TO_LIGHT_DIR);
float cosAlpha = max(0.0, dot(H, normalize(vNormal)));
float shine = pow(cosAlpha, uShininess);
const vec3 specularColor = vec3(1.0);
SPECULAR += shine * specularColor;
}