weird: added voronoi

weird/voronoi.glsl

@@ -0,0 +1,39 @@
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+uniform vec2 u_resolution;
+uniform vec2 u_mouse;
+uniform float u_time;
+
+vec2 random2( vec2 p ) {
+    return fract(sin(vec2(dot(p,vec2(127.1,311.7)),dot(p,vec2(269.5,183.3))))*43758.5453);
+}
+
+void main() {
+    vec2 st = gl_FragCoord.xy/u_resolution.xy;
+    st.x *= u_resolution.x/u_resolution.y;
+    vec3 color = vec3(161./256., 174./256., 216./256.);
+
+    st *= 100.;
+
+    vec2 i_st = floor(st);
+    vec2 f_st = fract(st);
+
+    float m_dist = 1.;
+
+    for (int y= -1; y <= 1; y++) {
+        for (int x= -1; x <= 1; x++) {
+            vec2 neighbor = vec2(float(x),float(y));
+            vec2 point = random2(i_st + neighbor);
+            point = 0.5 + 0.5*sin(u_time + 6.2831*point);
+
+            m_dist = min(m_dist, length(neighbor + point - f_st));
+        }
+    }
+
+    color += 1.-m_dist;
+    color += 1.-smoothstep(0.01, .1, m_dist);
+
+    gl_FragColor = vec4(1.-color,1.0);
+}