35 lines
802 B
Plaintext
35 lines
802 B
Plaintext
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precision lowp float;
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uniform sampler2D Texture;
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uniform sampler2D NormalMap;
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uniform vec3 LightDirection;
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varying vec2 texCoord;
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varying vec3 camVec;
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varying vec3 normVec;
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void main()
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{
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vec3 cVec = normalize(camVec);
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float parallax = 0.035;
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//double refinement
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float height = texture2D(NormalMap, texCoord.xy).a;
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float offset = parallax * (2.0 * height - 1.0);
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vec2 parallaxTexCoord = texCoord.xy + offset * cVec.xy;
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height += texture2D(NormalMap, parallaxTexCoord).a;
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offset = parallax * (height - 1.0);
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parallaxTexCoord = texCoord.xy + offset * cVec.xy;
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vec3 nvec = normalize(normVec);
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float cosf = max(0.0, dot(nvec, -LightDirection));
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gl_FragColor = vec4((texture2D(Texture, parallaxTexCoord).rgb * (cosf * 0.75 + 0.25)), 1.0);
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}
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