34 lines
880 B
GLSL
34 lines
880 B
GLSL
#pragma header
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#define PI 3.14159265359
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// Used for editors
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int steps = 16;
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int stepsInside = 2;
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float strength = 0.0075;
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vec4 getColor(vec2 pos) {
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vec2 ps = (pos);
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ps = clamp(ps, vec2(0.0), 1.0 - (1.0 / openfl_TextureSize.xy));
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return flixel_texture2D(bitmap, (ps));
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}
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void main() {
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// vec2 camPos = getCamPos(openfl_TextureCoordv);
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vec2 camPos = openfl_TextureCoordv;
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if (camPos.x < 0.0 || camPos.x > 1.0 || camPos.y < 0.0 || camPos.y > 1.0)
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return;
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vec4 color = getColor(camPos);
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float fsteps = steps;
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for(float inside = 1.0; inside < stepsInside+1.0; inside++) {
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for(int i = 0; i < steps; i++) {
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float fi = i;
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color += getColor(camPos + vec2(
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strength * (inside / stepsInside) * cos(fi / fsteps * (PI * 2.0)),
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strength * (inside / stepsInside) * sin(fi / fsteps * (PI * 2.0))
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));
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}
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}
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color /= steps * stepsInside;
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gl_FragColor = color;
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} |