33 lines
696 B
GLSL
33 lines
696 B
GLSL
uniform float time;
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uniform vec2 resolution;
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uniform vec2 mouse;
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#define MAX_ITER 3
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void main(void) {
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vec2 v_texCoord = gl_FragCoord.xy / min(resolution.x, resolution.y) / 2.0;
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vec2 p = v_texCoord * 8.0 - vec2(20.0);
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vec2 i = p;
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float c = 1.0;
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float inten = .05;
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for (int n = 0; n < MAX_ITER; n++) {
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float t = time * (1.0 - (3.0 / float(n+1)));
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i = p + vec2(cos(t - i.x) + sin(t + i.y),
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sin(t - i.y) + cos(t + i.x));
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c += 1.0/length(vec2(p.x / (sin(i.x+t)/inten),
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p.y / (cos(i.y+t)/inten)));
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}
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c /= float(MAX_ITER);
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c = 1.5 - sqrt(c);
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vec4 texColor = vec4(0.001, 0.1, 0.1, 1.);
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texColor.rgb *= (1.0 / (1.0 - (c + 0.05)));
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gl_FragColor = texColor;
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}
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