Initial

resources/app/client/pixi/webgl/shaders/lighting/effects/radial-rainbow.js

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+/**
+ * Radial rainbow animation coloration shader
+ */
+class RadialRainbowColorationShader extends AdaptiveColorationShader {
+
+  /** @override */
+  static forceDefaultColor = true;
+
+  /** @override */
+  static fragmentShader = `
+  ${this.SHADER_HEADER}
+  ${this.HSB2RGB}
+  ${this.PERCEIVED_BRIGHTNESS}
+
+  void main() {
+    ${this.FRAGMENT_BEGIN}
+
+    float intens = intensity * 0.1;
+    vec2 nuv = vUvs * 2.0 - 1.0;
+    vec2 puv = vec2(atan(nuv.x, nuv.y) * INVTWOPI + 0.5, length(nuv)); 
+    vec3 rainbow = hsb2rgb(vec3(puv.y - time * 0.2, 1.0, 1.0));
+    finalColor = mix(color, rainbow, smoothstep(0.0, 1.5 - intens, dist))
+                  * (1.0 - dist * dist * dist);
+    
+    ${this.COLORATION_TECHNIQUES}
+    ${this.ADJUSTMENTS}
+    ${this.FALLOFF}
+    ${this.FRAGMENT_END}
+  }`;
+}