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resources/app/client/pixi/webgl/shaders/lighting/effects/hexa-dome.js

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+/**
+ * Hexagonal dome animation coloration shader
+ */
+class HexaDomeColorationShader extends AdaptiveColorationShader {
+
+  /** @override */
+  static forceDefaultColor = true;
+
+  /** @override */
+  static fragmentShader = `
+  ${this.SHADER_HEADER}
+  ${this.PERCEIVED_BRIGHTNESS}
+
+  // rotate and scale uv
+  vec2 transform(in vec2 uv, in float dist) {
+    float hspherize = (1.0 - sqrt(1.0 - dist)) / dist;
+    float t = -time * 0.20;
+    float scale = 10.0 / (11.0 - intensity);
+    float cost = cos(t);
+    float sint = sin(t);
+
+    mat2 rotmat = mat2(cost, -sint, sint, cost);
+    mat2 scalemat = mat2(scale, 0.0, 0.0, scale);
+    uv -= PIVOT; 
+    uv *= rotmat * scalemat * hspherize;
+    uv += PIVOT;
+    return uv;
+  }
+
+  // Adapted classic hexa algorithm
+  float hexDist(in vec2 uv) {
+    vec2 p = abs(uv);
+    float c = dot(p, normalize(vec2(1.0, 1.73)));
+    c = max(c, p.x);
+    return c;
+  }
+
+  vec4 hexUvs(in vec2 uv) {
+    const vec2 r = vec2(1.0, 1.73);
+    const vec2 h = r*0.5;
+    
+    vec2 a = mod(uv, r) - h;
+    vec2 b = mod(uv - h, r) - h;
+    vec2 gv = dot(a, a) < dot(b,b) ? a : b;
+    
+    float x = atan(gv.x, gv.y);
+    float y = 0.55 - hexDist(gv);
+    vec2 id = uv - gv;
+    return vec4(x, y, id.x, id.y);
+  }
+
+  vec3 hexa(in vec2 uv) {
+    float t = time;
+    vec2 uv1 = uv + vec2(0.0, sin(uv.y) * 0.25);
+    vec2 uv2 = 0.5 * uv1 + 0.5 * uv + vec2(0.55, 0);
+    float a = 0.2;
+    float c = 0.5;
+    float s = -1.0;
+    uv2 *= mat2(c, -s, s, c);
+
+    vec3 col = color;
+    float hexy = hexUvs(uv2 * 10.0).y;
+    float hexa = smoothstep( 3.0 * (cos(t)) + 4.5, 12.0, hexy * 20.0) * 3.0;
+
+    col *= mix(hexa, 1.0 - hexa, min(hexy, 1.0 - hexy));
+    col += color * fract(smoothstep(1.0, 2.0, hexy * 20.0)) * 0.65;
+    return col;
+  }
+
+  void main() {
+    ${this.FRAGMENT_BEGIN}
+
+    // Rotate, magnify and hemispherize the uvs
+    vec2 uv = transform(vUvs, dist);
+    
+    // Hexaify the uv (hemisphere) and apply fade and alpha
+    finalColor = hexa(uv) * pow(1.0 - dist, 0.18) * colorationAlpha;
+    ${this.COLORATION_TECHNIQUES}
+    ${this.ADJUSTMENTS}
+    ${this.FALLOFF}
+    ${this.FRAGMENT_END}
+  }`;
+}