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varying vec3 N, L0, H0, L1, H1;
varying vec4 D0, A0, D1, A1;
uniform float fog_r;
uniform float fog_g;
uniform float fog_b;
uniform float fog_enabled;
uniform bool lighting_enabled;
varying float fog;
void main()
{
vec3 n, h;
float NdotL, NdotH;
vec4 color;
n = normalize(N);
NdotL = max(dot(n, normalize(L0)), 0.0);
float shininess = gl_FrontMaterial.shininess;
color = A0;
if (lighting_enabled){
color = A0 + A1;
if (NdotL > 0.0) {
color += D0 * NdotL;
h = normalize(H0);
NdotH = max(dot(n, h), 0.0);
color += gl_LightSource[0].specular * pow(NdotH, shininess);
}
NdotL = max(dot(n, normalize(L1)), 0.0);
if (NdotL > 0.0) {
color += D1 * NdotL;
h = normalize(H1);
NdotH = max(dot(n, h), 0.0);
color += gl_LightSource[1].specular * pow(NdotH, shininess);
}
}
float cfog = mix(1.0, clamp(fog, 0.0, 1.0), fog_enabled);
gl_FragColor = vec4(mix(color.rgb, fog_color, cfog), A0.a);
}
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