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18 lines
378 B
GLSL
18 lines
378 B
GLSL
#version 300 es
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precision mediump float;
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in vec2 vUvs;
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out vec4 shaderOut;
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#define M_PI 3.14159265358979
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uniform float uFreq;
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uniform float uPhase;
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void main() {
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vec2 uv = vUvs;
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float sx = sign(sin(uFreq * uv.x * 2. * M_PI + uPhase));
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float sy = sign(sin(uFreq * uv.y * 2. * M_PI + uPhase));
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float s = sx * sy * .5 + .5;
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shaderOut = vec4(vec3(s), 1.0);
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}
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