forked from mirrors/principia
958f4f5056
Assumedly abbreviation of "global illumination", some kind of alternative to the current way of drawing the shadows. Doesn't work very well when enabled, remove it.
23 lines
598 B
GLSL
23 lines
598 B
GLSL
uniform vec4 color;
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UNIFORMS
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varying mediump vec3 FS_eye;
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varying mediump vec3 FS_normal;
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VARYINGS
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void main(void)
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{
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vec3 n = normalize(FS_normal);
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float diffuse = clamp(dot(LIGHT, n)*_DIFFUSE, 0., 1.);
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float ambient = _AMBIENT + .25*n.z;
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vec3 e = normalize(FS_eye);
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vec3 R = normalize(reflect(LIGHT, n));
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float specular = pow(clamp(max(dot(R, e), .0), 0., 1.), 18.);
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specular += pow(clamp(max(dot(vec3(0.,0.,1), n), .0), 0., 1.), 18.);
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float shadow = clamp(SHADOW, .5, 1.);
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gl_FragColor = specular*vec4(.7) + shadow * color * diffuse + color * ambient;
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}
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