34 lines
1.3 KiB
PostScript
34 lines
1.3 KiB
PostScript
#version 330 core
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// Input
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in vec4 LightColor;
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// Output
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out vec4 PixelColor;
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// Uniforms
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uniform vec4 TintColor;
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// Functions
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float InterpolateDecelerate(float Min, float Max, float t, float Factor)
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{
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float Alpha = (1.0 - pow(1.0 - t, Factor));
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return mix(Min, Max, Alpha);
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}
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// Main
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void main()
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{
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const float kMaxDepth = 75.0; // Controls the max depth range that kDepthTintNear and kDepthTintFar are interpolated between
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const float kDepthTintNear = 0.0; // Sets the pixel color offset for pixels close to the screen
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const float kDepthTintFar = -0.2; // Sets the pixel color offset for pixels far from the screen
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const float kDepthCurveFactor = 2; // Controls the strength of the interpolation curve (higher = color changes faster from up close and slower from further away)
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// Apply some fake fog so pixels closer to the camera appear slightly brighter
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float Depth = ( (2.0 * gl_FragCoord.z - gl_DepthRange.near - gl_DepthRange.far) / (gl_DepthRange.far - gl_DepthRange.near) ) / gl_FragCoord.w;
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float DepthAlpha = min(Depth, kMaxDepth) / kMaxDepth;
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DepthAlpha = clamp(DepthAlpha, 0.0, 1.0);
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float DepthTint = InterpolateDecelerate(kDepthTintNear, kDepthTintFar, DepthAlpha, kDepthCurveFactor);
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PixelColor = (LightColor + vec4(DepthTint, DepthTint, DepthTint, 1.0)) * TintColor;
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}
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