mirror of
https://github.com/Ttanasart-pt/Pixel-Composer.git
synced 2024-12-26 06:56:45 +01:00
30 lines
934 B
GLSL
30 lines
934 B
GLSL
//
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// Simple passthrough fragment shader
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//
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varying vec2 v_vTexcoord;
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varying vec4 v_vColour;
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uniform vec2 noiseAmount;
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uniform vec2 position;
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uniform float angle;
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uniform float seed;
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float random1D (in vec2 st, float _seed) { return fract(sin(dot(st.xy, vec2(12.9898, 78.233)) * mod(_seed, 32.156) * 12.588) * 43758.5453123); }
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float random (in vec2 st) { return mix(random1D(st, floor(seed)), random1D(st, floor(seed) + 1.), fract(seed)); }
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void main() {
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vec2 pos = v_vTexcoord - position, _pos;
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_pos.x = pos.x * cos(angle) - pos.y * sin(angle);
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_pos.y = pos.x * sin(angle) + pos.y * cos(angle);
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float yy = floor(_pos.y * noiseAmount.y);
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float xx = (_pos.x + random1D(vec2(yy), floor(seed))) * noiseAmount.x;
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float x0 = floor(xx);
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float x1 = floor(xx) + 1.;
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float noise0 = random(vec2(x0, yy));
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float noise1 = random(vec2(x1, yy));
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gl_FragColor = vec4(vec3(mix(noise0, noise1, (xx - x0) / (x1 - x0))), 1.);
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}
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