Initial

resources/app/client/pixi/webgl/shaders/lighting/effects/star-light.js

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+/**
+ * A disco like star light.
+ */
+class StarLightColorationShader extends AdaptiveColorationShader {
+
+  /** @override */
+  static forceDefaultColor = true;
+
+  /** @override */
+  static fragmentShader = `
+  ${this.SHADER_HEADER}
+  ${this.PERCEIVED_BRIGHTNESS}
+  ${this.PRNG}
+  ${this.NOISE}
+  ${this.FBM(2, 1.0)}
+
+  vec2 transform(in vec2 uv, in float dist) {
+    float t = time * 0.20;
+    float cost = cos(t);
+    float sint = sin(t);
+
+    mat2 rotmat = mat2(cost, -sint, sint, cost);
+    uv *= rotmat;
+    return uv;
+  }
+
+  float makerays(in vec2 uv, in float t) {
+    vec2 uvn = normalize(uv * (uv + t)) * (5.0 + intensity);
+    return max(clamp(0.5 * tan(fbm(uvn - t)), 0.0, 2.25),
+               clamp(3.0 - tan(fbm(uvn + t * 2.0)), 0.0, 2.25));
+  }
+
+  float starlight(in float dist) {
+    vec2 uv = (vUvs - 0.5);
+    uv = transform(uv, dist);
+    float rays = makerays(uv, time * 0.5);
+    return pow(1.0 - dist, rays) * pow(1.0 - dist, 0.25);
+  }
+
+  void main() {
+    ${this.FRAGMENT_BEGIN}
+    finalColor = clamp(color * starlight(dist) * colorationAlpha, 0.0, 1.0);
+    ${this.COLORATION_TECHNIQUES}
+    ${this.ADJUSTMENTS}
+    ${this.FALLOFF}
+    ${this.FRAGMENT_END}
+  }
+  `;
+}