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22 lines
663 B
Text
22 lines
663 B
Text
uniform float _Fresnel;
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uniform float _SpecIntensity;
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float saturate (float f) { return max(0.0, min(1.0,f)); }
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float splineFresnel (in vec3 N, in vec3 E, in float specIntensity, in float fresnel)
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{
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float factor = (1.0 - saturate(dot(N,E)));
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float factor3 = ((factor * factor) * factor);
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vec3 p = vec3(1.0, factor, factor3);
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vec2 t = vec2(1.0 - fresnel, fresnel);
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p.x = dot(p.xy, t);
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p.y = dot(p.yz, t);
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factor = (0.05 + (0.95 * dot(p.xy, t)));
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factor *= specIntensity;
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return factor;
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}
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varying vec3 inN;
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varying vec3 inE;
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void main()
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{
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float f = splineFresnel (inN, inE, _SpecIntensity, _Fresnel);
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gl_FragColor = vec4(f);
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}
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