34 lines
859 B
GLSL
Executable file
34 lines
859 B
GLSL
Executable file
// Per-Object Motion Blur
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// http://john-chapman-graphics.blogspot.com/2013/01/per-object-motion-blur.html
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#version 450
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#include "compiled.inc"
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uniform sampler2D sveloc;
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uniform sampler2D tex;
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// uniform vec2 texStep;
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uniform float frameScale;
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in vec2 texCoord;
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out vec4 fragColor;
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void main() {
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vec2 velocity = textureLod(sveloc, texCoord, 0.0).rg * motionBlurIntensity * frameScale;
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#ifdef _InvY
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velocity.y = -velocity.y;
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#endif
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fragColor.rgb = textureLod(tex, texCoord, 0.0).rgb;
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// float speed = length(velocity / texStep);
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// const int MAX_SAMPLES = 8;
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// int samples = clamp(int(speed), 1, MAX_SAMPLES);
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const int samples = 8;
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for (int i = 0; i < samples; ++i) {
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vec2 offset = velocity * (float(i) / float(samples - 1) - 0.5);
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fragColor.rgb += textureLod(tex, texCoord + offset, 0.0).rgb;
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}
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fragColor.rgb /= float(samples + 1);
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}
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