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#define PARALLAX_SCALE 0.04
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#define PARALLAX_BIAS -0.02
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vec2 getParallaxOffset(vec3 eyeDir, mat3 tbn, float height)
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{
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vec3 TSeyeDir = normalize((vec4(normalize(tbn * eyeDir),0)).xyz);
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return TSeyeDir.xy * ( height * PARALLAX_SCALE + PARALLAX_BIAS );
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}
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