thing_web/public/cdn/three/LuminosityHighPassShader.js

(function () {
  /**
   * Luminosity
   * http://en.wikipedia.org/wiki/Luminosity
   */

  const LuminosityHighPassShader = {
    shaderID: "luminosityHighPass",
    uniforms: {
      tDiffuse: {
        value: null
      },
      luminosityThreshold: {
        value: 1.0
      },
      smoothWidth: {
        value: 1.0
      },
      defaultColor: {
        value: new THREE.Color(0x000000)
      },
      defaultOpacity: {
        value: 0.0
      }
    },
    vertexShader:
      /* glsl */
      `
		varying vec2 vUv;
		void main() {
			vUv = uv;
			gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
		}`,
    fragmentShader:
      /* glsl */
      `
		uniform sampler2D tDiffuse;
		uniform vec3 defaultColor;
		uniform float defaultOpacity;
		uniform float luminosityThreshold;
		uniform float smoothWidth;
		varying vec2 vUv;
		void main() {
			vec4 texel = texture2D( tDiffuse, vUv );
			vec3 luma = vec3( 0.299, 0.587, 0.114 );
			float v = dot( texel.xyz, luma );
			vec4 outputColor = vec4( defaultColor.rgb, defaultOpacity );
			float alpha = smoothstep( luminosityThreshold, luminosityThreshold + smoothWidth, v );
			gl_FragColor = mix( outputColor, texel, alpha );
           
		}`
  };

  THREE.LuminosityHighPassShader = LuminosityHighPassShader;
})();