55 lines
1.3 KiB
GLSL
55 lines
1.3 KiB
GLSL
#ifdef GL_ES
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precision mediump float;
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#endif
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uniform float time;
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uniform vec2 resolution;
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#define FORMUPARAM 0.589
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#define ITERATIONS 100
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#define INNER_ITERS 11
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#define ZOOM -1.2
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void main()
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{
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vec2 uv = vec2(gl_FragCoord.x - resolution.x * 0.5, gl_FragCoord.y - resolution.y * 0.5) / max(resolution.x, resolution.y);
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uv *= ZOOM;
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// uv += vec2(.15 * sin(time * .2), .1 * cos(time * .1));
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float t = time * .15 + ((.25+.05*sin(time*.1))/(length(uv.xy)+.07))* 2.2;
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float si = sin(t);
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float co = cos(t);
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mat2 ma = mat2(co, si, -si, co);
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float c = 0.0;
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float v1 = 0.0;
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float v2 = 0.0;
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for (int i = 0; i < ITERATIONS; i++)
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{
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float s = float(i) * .035;
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vec3 p = s * vec3(uv, 1.0 + sin(time * .015));
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p.xy *= ma;
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p += vec3(.22,.3, s-1.5-sin(t*.13)*.1);
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for (int i = 0; i < INNER_ITERS; i++)
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{
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p = abs(p) / dot(p,p) - FORMUPARAM;
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}
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v1 += dot(p,p)*.0015 * (2.8+sin(length(uv.xy*18.0)+.5-t*.7));
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v2 += dot(p,p)*.0025 * (1.5+sin(length(uv.xy*13.5)+1.21-t*.3));
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c = length(p.xy*.3) * .85;
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}
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float len = length(uv);
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v1 *= smoothstep(.7, .0, len);
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v2 *= smoothstep(.6, .0, len);
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float re = clamp(c, 0.0, 1.0);
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float gr = clamp((v1+c)*.25, 0.0, 1.0);
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float bl = clamp(v2, 0.0, 1.0);
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vec3 col = vec3(re, gr, bl) + smoothstep(0.15, .0, len) * .9;
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gl_FragColor=vec4(col, 1.0);
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}
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