30f844c961
Handle emission and light model ambient value. Test if shininess is 0 to avoid pow(0, 0), which is undefined.
31 lines
914 B
C++
31 lines
914 B
C++
// -*-C++-*-
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varying vec4 diffuse, ambient;
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varying vec3 normal, lightDir, halfVector;
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varying float fogCoord;
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uniform sampler2D texture;
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void main()
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{
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vec3 n, halfV;
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float NdotL, NdotHV, fogFactor;
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vec4 color = ambient + gl_FrontMaterial.emission;
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vec4 texel;
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vec4 fragColor;
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n = normalize(normal);
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NdotL = max(dot(n, lightDir), 0.0);
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if (NdotL > 0.0) {
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color += diffuse * NdotL;
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halfV = normalize(halfVector);
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NdotHV = max(dot(n, halfV), 0.0);
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if (gl_FrontMaterial.shininess > 0.0)
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color += gl_FrontMaterial.specular * gl_LightSource[0].specular
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* pow(NdotHV, gl_FrontMaterial.shininess);
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}
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texel = texture2D(texture, gl_TexCoord[0].st);
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fragColor = color * texel;
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fogFactor = exp(-gl_Fog.density * gl_Fog.density * fogCoord * fogCoord);
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gl_FragColor = mix(gl_Fog.color, fragColor, fogFactor);
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}
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