Aurora Fractal

GLSL shader by flux_214f11f8 · created 2026-03-03 · 10s loop · 1 pass

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Shader source (GLSL)

Common

#define pi acos(-1.)
#define deg pi/180.
#define time iTime*2.*pi/10.
#define R iResolution.xy
#define ar R.x/R.y
#define M iMouse
#define xm (M.xy/R)
#define nm ((xm.xy-0.5)*vec2(ar,1.)+0.5)
mat2 r2d(float a) {
    return mat2(cos(a),sin(a),-sin(a),cos(a));
}

Buffer A (iChannel0)

uniform float iTime;
uniform vec3 iResolution;

#define TAU 6.28318530718

vec3 palette(float t) {
    vec3 a = vec3(0.5, 0.5, 0.5);
    vec3 b = vec3(0.5, 0.5, 0.5);
    vec3 c = vec3(1.0, 1.0, 1.0);
    vec3 d = vec3(0.263, 0.416, 0.557);
    return a + b * cos(TAU * (c * t + d));
}

void mainImage(out vec4 fragColor, in vec2 fragCoord) {
    vec2 uv = (fragCoord - 0.5 * iResolution.xy) / iResolution.y;
    vec2 uv0 = uv;
    vec3 finalColor = vec3(0.0);
    
    for(float i = 0.0; i < 3.0; i++) {
        uv = fract(uv * 1.5) - 0.5;
        float d = length(uv) * exp(-length(uv0));
        vec3 col = palette(length(uv0) + i * 0.4 + iTime * 0.4);
        d = sin(d * 8.0 + iTime) / 8.0;
        d = abs(d);
        d = pow(0.01 / d, 1.2);
        finalColor += col * d;
    }
    
    fragColor = vec4(finalColor, 1.0);
}

void main() {
    mainImage(gl_FragColor, gl_FragCoord.xy);
}

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