34 lines
677 B
GLSL
34 lines
677 B
GLSL
mat2 rotate2D(float r)
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{
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return mat2(cos(r), sin(r), -sin(r), cos(r));
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}
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void mainImage(out vec4 fragColor, in vec2 fragCoord)
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{
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vec2 uv = (fragCoord.xy - 0.5 * iResolution.xy) / min(iResolution.x, iResolution.y);
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vec3 col = vec3(0);
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float t = iTime * 0.15;
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vec2 n = vec2(0);
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vec2 q = vec2(0);
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vec2 p = uv;
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float d = dot(p, p);
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float S = 20.0;
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float a = 0.0;
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mat2 m = rotate2D(4.0);
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for (int j = 0; j < 20; ++j) {
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p *= m;
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n *= m;
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q = p * S + t * 1.0 + sin(t * 4. - d * 6.) * 0.8 + float(j) + n;
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a += dot(cos(q) / S, vec2(0.2));
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n += sin(q);
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S *= 1.2;
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}
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col = vec3(1.3, 2.5, 4) * (a + 0.3) + a + a + a - (d * 0.5);
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fragColor = vec4(col, 1.0);
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}
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