three-stdlib/shaders/BleachBypassShader.cjs

stand-alone library of threejs examples

"use strict";
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const BleachBypassShader = {
  uniforms: {
    tDiffuse: { value: null },
    opacity: { value: 1 }
  },
  vertexShader: [
    "varying vec2 vUv;",
    "void main() {",
    "	vUv = uv;",
    "	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
    "}"
  ].join("\n"),
  fragmentShader: [
    "uniform float opacity;",
    "uniform sampler2D tDiffuse;",
    "varying vec2 vUv;",
    "void main() {",
    "	vec4 base = texture2D( tDiffuse, vUv );",
    "	vec3 lumCoeff = vec3( 0.25, 0.65, 0.1 );",
    "	float lum = dot( lumCoeff, base.rgb );",
    "	vec3 blend = vec3( lum );",
    "	float L = min( 1.0, max( 0.0, 10.0 * ( lum - 0.45 ) ) );",
    "	vec3 result1 = 2.0 * base.rgb * blend;",
    "	vec3 result2 = 1.0 - 2.0 * ( 1.0 - blend ) * ( 1.0 - base.rgb );",
    "	vec3 newColor = mix( result1, result2, L );",
    "	float A2 = opacity * base.a;",
    "	vec3 mixRGB = A2 * newColor.rgb;",
    "	mixRGB += ( ( 1.0 - A2 ) * base.rgb );",
    "	gl_FragColor = vec4( mixRGB, base.a );",
    "}"
  ].join("\n")
};
exports.BleachBypassShader = BleachBypassShader;
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