Initial

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

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+/**
+ * Ghost light animation illumination shader
+ */
+class GhostLightIlluminationShader extends AdaptiveIlluminationShader {
+  static fragmentShader = `
+  ${this.SHADER_HEADER}
+  ${this.PERCEIVED_BRIGHTNESS}
+  ${this.PRNG}
+  ${this.NOISE}
+  ${this.FBM(3, 1.0)}
+
+  void main() {
+    ${this.FRAGMENT_BEGIN}
+    
+    // Creating distortion with vUvs and fbm
+    float distortion1 = fbm(vec2( 
+                        fbm(vUvs * 5.0 - time * 0.50), 
+                        fbm((-vUvs - vec2(0.01)) * 5.0 + time * INVTHREE)));
+    
+    float distortion2 = fbm(vec2(
+                        fbm(-vUvs * 5.0 - time * 0.50),
+                        fbm((-vUvs + vec2(0.01)) * 5.0 + time * INVTHREE)));
+    vec2 uv = vUvs;
+      
+    // time related var
+    float t = time * 0.5;
+    float tcos = 0.5 * (0.5 * (cos(t)+1.0)) + 0.25;
+
+    ${this.TRANSITION}
+    finalColor *= mix( distortion1 * 1.5 * (intensity * 0.2),
+                       distortion2 * 1.5 * (intensity * 0.2), tcos);
+    ${this.ADJUSTMENTS}
+    ${this.FALLOFF}
+    ${this.FRAGMENT_END}
+  }`;
+}
+
+/* -------------------------------------------- */
+
+/**
+ * Ghost light animation coloration shader
+ */
+class GhostLightColorationShader extends AdaptiveColorationShader {
+  static fragmentShader = `
+  ${this.SHADER_HEADER}
+  ${this.PRNG}
+  ${this.NOISE}
+  ${this.FBM(3, 1.0)}
+  ${this.PERCEIVED_BRIGHTNESS}
+
+  void main() {
+    ${this.FRAGMENT_BEGIN}
+    
+    // Creating distortion with vUvs and fbm
+    float distortion1 = fbm(vec2( 
+                        fbm(vUvs * 3.0 + time * 0.50), 
+                        fbm((-vUvs + vec2(1.)) * 5.0 + time * INVTHREE)));
+    
+    float distortion2 = fbm(vec2(
+                        fbm(-vUvs * 3.0 + time * 0.50),
+                        fbm((-vUvs + vec2(1.)) * 5.0 - time * INVTHREE)));
+    vec2 uv = vUvs;
+      
+    // time related var
+    float t = time * 0.5;
+    float tcos = 0.5 * (0.5 * (cos(t)+1.0)) + 0.25;
+    float tsin = 0.5 * (0.5 * (sin(t)+1.0)) + 0.25;
+    
+    // Creating distortions with cos and sin : create fluidity
+    uv -= PIVOT;
+    uv *= tcos * distortion1;
+    uv *= tsin * distortion2;
+    uv *= fbm(vec2(time + distortion1, time + distortion2));
+    uv += PIVOT;
+
+    finalColor = distortion1 * distortion1 * 
+                 distortion2 * distortion2 * 
+                 color * pow(1.0 - dist, dist)
+                 * colorationAlpha * mix( uv.x + distortion1 * 4.5 * (intensity * 0.2),
+                                          uv.y + distortion2 * 4.5 * (intensity * 0.2), tcos);
+    ${this.COLORATION_TECHNIQUES}
+    ${this.ADJUSTMENTS}
+    ${this.FALLOFF}
+    ${this.FRAGMENT_END}
+  }`;
+}