demo

shaders/fractal.frag

@@ -0,0 +1,22 @@
+#version 100
+precision mediump float;
+uniform float u_time;
+uniform vec2 u_resolution;
+
+void main() {
+    vec2 uv = (gl_FragCoord.xy * 2.0 - u_resolution.xy) / u_resolution.y;
+    vec2 u0 = uv;
+    vec3 finalColor = vec3(0.0);
+    
+    for (float i = 0.0; i < 4.0; i++) {
+        uv = fract(uv * 1.5) - 0.5;
+        float d = length(uv) * exp(-length(u0));
+        vec3 col = vec3(0.2, 0.5, 0.82);
+        d = sin(d * 8.0 + u_time) / 8.0;
+        d = abs(d);
+        d = pow(0.01 / d, 1.2);
+        finalColor += col * d;
+    }
+    
+    gl_FragColor = vec4(finalColor, 1.0);
+}