Initial

resources/app/client/pixi/webgl/shaders/lighting/effects/sunburst.js

@@ -0,0 +1,87 @@
+/**
+ * Sunburst animation illumination shader
+ */
+class SunburstIlluminationShader extends AdaptiveIlluminationShader {
+  static fragmentShader = `
+  ${this.SHADER_HEADER}
+  ${this.PERCEIVED_BRIGHTNESS}
+
+  // Smooth back and forth between a and b
+  float cosTime(in float a, in float b) {
+    return (a - b) * ((cos(time) + 1.0) * 0.5) + b;
+  }
+
+  // Create the sunburst effect
+  vec3 sunBurst(in vec3 color, in vec2 uv, in float dist) {
+    // Pulse calibration
+    float intensityMod = 1.0 + (intensity * 0.05);
+    float lpulse = cosTime(1.3 * intensityMod, 0.85 * intensityMod);
+    
+    // Compute angle
+    float angle = atan(uv.x, uv.y) * INVTWOPI;
+    
+    // Creating the beams and the inner light
+    float beam = fract(angle * 16.0 + time);
+    float light = lpulse * pow(abs(1.0 - dist), 0.65);
+    
+    // Max agregation of the central light and the two gradient edges
+    float sunburst = max(light, max(beam, 1.0 - beam));
+        
+    // Creating the effect : applying color and color correction. ultra saturate the entire output color.
+    return color * pow(sunburst, 3.0);
+  }
+
+  void main() {
+    ${this.FRAGMENT_BEGIN}
+    vec2 uv = (2.0 * vUvs) - 1.0;
+    finalColor = switchColor(computedBrightColor, computedDimColor, dist);
+    ${this.ADJUSTMENTS}
+    finalColor = sunBurst(finalColor, uv, dist);
+    ${this.FALLOFF}
+    ${this.FRAGMENT_END}
+  }`;
+}
+
+/**
+ * Sunburst animation coloration shader
+ */
+class SunburstColorationShader extends AdaptiveColorationShader {
+  static fragmentShader = `
+  ${this.SHADER_HEADER}
+  ${this.PERCEIVED_BRIGHTNESS}
+
+  // Smooth back and forth between a and b
+  float cosTime(in float a, in float b) {
+    return (a - b) * ((cos(time) + 1.0) * 0.5) + b;
+  }
+
+  // Create a sun burst effect
+  vec3 sunBurst(in vec2 uv, in float dist) {
+    // pulse calibration
+    float intensityMod = 1.0 + (intensity * 0.05);
+    float lpulse = cosTime(1.1 * intensityMod, 0.85 * intensityMod);
+
+    // compute angle
+    float angle = atan(uv.x, uv.y) * INVTWOPI;
+    
+    // creating the beams and the inner light
+    float beam = fract(angle * 16.0 + time);
+    float light = lpulse * pow(abs(1.0 - dist), 0.65);
+    
+    // agregation of the central light and the two gradient edges to create the sunburst
+    float sunburst = max(light, max(beam, 1.0 - beam));
+        
+    // creating the effect : applying color and color correction. saturate the entire output color.
+    return color * pow(sunburst, 3.0);
+  }
+
+  void main() {
+    ${this.FRAGMENT_BEGIN}
+    vec2 uvs = (2.0 * vUvs) - 1.0;
+    finalColor = sunBurst(uvs, dist) * colorationAlpha;
+    ${this.COLORATION_TECHNIQUES}
+    ${this.ADJUSTMENTS}
+    ${this.FALLOFF}
+    ${this.FRAGMENT_END}
+  }`;
+}