39 lines
907 B
GLSL
39 lines
907 B
GLSL
uniform sampler2D tex;
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varying vec4 diffuse, ambient;
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varying vec3 normal, pos;
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void main() {
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vec3 n, l, refl, eye;
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float NdotL, RdotE;
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vec4 specularColor;
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float dist, distSq, att, specularFactor;
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n = normalize(normal);
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l = gl_LightSource[0].position.xyz - pos;
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distSq = dot(l, l);
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NdotL = dot(n, l);
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if (NdotL > 0.0) {
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dist = sqrt(distSq);
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att = 1.0 / (gl_LightSource[0].quadraticAttenuation * distSq);
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gl_FragColor = att * (diffuse * NdotL / dist + ambient) * texture2D(tex, gl_TexCoord[0].st);
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refl = reflect(-l, n);
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RdotE = -dot(refl, pos) / sqrt(dot(refl, refl) * dot(pos, pos));
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if(RdotE > 0.0) {
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specularFactor = att * pow(RdotE, gl_FrontMaterial.shininess);
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gl_FragColor += specularFactor * gl_FrontMaterial.specular * gl_LightSource[0].specular;
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}
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}
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else {
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gl_FragColor = vec4(0, 0, 0, 1);
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}
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}
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