43 lines
1.0 KiB
GLSL
43 lines
1.0 KiB
GLSL
#version 330 core
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precision highp float;
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out vec4 FragColor;
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in vec2 vUV;
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uniform vec2 iResolution;
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uniform float iTime;
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#define t iTime
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#define r iResolution.xy
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void mainImage(out vec4 fragColor, in vec2 fragCoord) {
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vec3 c = vec3(0.0);
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float l;
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float z = t;
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for (int i = 0; i < 3; i++) {
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vec2 uv, p = fragCoord.xy / r;
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uv = p;
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p -= 0.5;
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p.x *= r.x / r.y;
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z += 0.07;
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l = length(p);
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// evitar división por cero
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float invl = (l > 0.0) ? (1.0 / l) : 0.0;
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uv += p * invl * (sin(z) + 1.0) * abs(sin(l * 9.0 - z - z));
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vec2 m = mod(uv, 1.0) - 0.5;
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float denom = length(m);
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// evitar división por cero en el denominador
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if (denom < 1e-6) denom = 1e-6;
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c[i] = 0.01 / denom;
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}
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// si l es cero, usar 1.0 para evitar NaN
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float L = (l > 0.0) ? l : 1.0;
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fragColor = vec4(c / L, t);
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}
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void main() {
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vec2 fragCoordPixels = vUV * iResolution;
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vec4 outColor;
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mainImage(outColor, fragCoordPixels);
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FragColor = outColor;
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}
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