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resources/app/client/pixi/webgl/shaders/lighting/effects/bewitching-wave.js

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+/**
+ * Bewitching Wave animation illumination shader
+ */
+class BewitchingWaveIlluminationShader extends AdaptiveIlluminationShader {
+  static fragmentShader = `
+  ${this.SHADER_HEADER}
+  ${this.PRNG}
+  ${this.NOISE}
+  ${this.FBM(4, 1.0)}
+  ${this.PERCEIVED_BRIGHTNESS}
+
+  // Transform UV
+  vec2 transform(in vec2 uv, in float dist) {
+    float t = time * 0.25;
+    mat2 rotmat = mat2(cos(t), -sin(t), sin(t), cos(t));
+    mat2 scalemat = mat2(2.5, 0.0, 0.0, 2.5);
+    uv -= vec2(0.5); 
+    uv *= rotmat * scalemat;
+    uv += vec2(0.5);
+    return uv;
+  }
+
+  float bwave(in float dist) {
+    vec2 uv = transform(vUvs, dist);
+    float motion = fbm(uv + time * 0.25);
+    float distortion = mix(1.0, motion, clamp(1.0 - dist, 0.0, 1.0));
+    float sinWave = 0.5 * (sin(-time * 6.0 + dist * 10.0 * intensity * distortion) + 1.0);
+    return 0.3 * sinWave + 0.8;
+  }
+
+  void main() {
+    ${this.FRAGMENT_BEGIN}
+    ${this.TRANSITION}
+    finalColor *= bwave(dist);
+    ${this.ADJUSTMENTS}
+    ${this.FALLOFF}
+    ${this.FRAGMENT_END}
+  }`;
+}
+
+/* -------------------------------------------- */
+
+/**
+ * Bewitching Wave animation coloration shader
+ */
+class BewitchingWaveColorationShader extends AdaptiveColorationShader {
+  static fragmentShader = `
+  ${this.SHADER_HEADER}
+  ${this.PRNG}
+  ${this.NOISE}
+  ${this.FBM(4, 1.0)}
+  ${this.PERCEIVED_BRIGHTNESS}
+
+  // Transform UV
+  vec2 transform(in vec2 uv, in float dist) {
+    float t = time * 0.25;
+    mat2 rotmat = mat2(cos(t), -sin(t), sin(t), cos(t));
+    mat2 scalemat = mat2(2.5, 0.0, 0.0, 2.5);
+    uv -= vec2(0.5); 
+    uv *= rotmat * scalemat;
+    uv += vec2(0.5);
+    return uv;
+  }
+
+  float bwave(in float dist) {
+    vec2 uv = transform(vUvs, dist);
+    float motion = fbm(uv + time * 0.25);
+    float distortion = mix(1.0, motion, clamp(1.0 - dist, 0.0, 1.0));
+    float sinWave = 0.5 * (sin(-time * 6.0 + dist * 10.0 * intensity * distortion) + 1.0);
+    return 0.55 * sinWave + 0.8;
+  }
+
+  void main() {
+    ${this.FRAGMENT_BEGIN}
+    finalColor = color * bwave(dist) * colorationAlpha;
+    ${this.COLORATION_TECHNIQUES}
+    ${this.ADJUSTMENTS}
+    ${this.FALLOFF}
+    ${this.FRAGMENT_END}
+  }`;
+}