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27 lines
435 B
27 lines
435 B
11 years ago
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#version 330
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uniform float rotation;
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in vec2 pos;
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in vec2 start;
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out vec4 fragColor;
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void main(){
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vec2 z = start;
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int i = 0;
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for (i = 0; i < 30; i++) {
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vec2 zsq = z*z;
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if(zsq.x + zsq.y > 16.0) break;
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float t = zsq.x - zsq.y + pos.x;
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z.y = 2.0*z.x*z.y + pos.y;
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z.x = t;
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}
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fragColor = vec4(float(i) / 30.0);
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fragColor.bg = 0.5 * sin(z) + 0.5;
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}
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