three
Version:
JavaScript 3D library
25 lines (14 loc) • 671 B
JavaScript
import { float, Fn, vec3, vec4, min, max, mix, luminance } from 'three/tsl';
export const bleach = /*@__PURE__*/ Fn( ( [ color, opacity = 1 ] ) => {
const base = color;
const lum = luminance( base.rgb );
const blend = vec3( lum );
const L = min( 1.0, max( 0.0, float( 10.0 ).mul( lum.sub( 0.45 ) ) ) );
const result1 = blend.mul( base.rgb ).mul( 2.0 );
const result2 = float( 2.0 ).mul( blend.oneMinus() ).mul( base.rgb.oneMinus() ).oneMinus();
const newColor = mix( result1, result2, L );
const A2 = base.a.mul( opacity );
const mixRGB = A2.mul( newColor.rgb );
mixRGB.addAssign( base.rgb.mul( A2.oneMinus() ) );
return vec4( mixRGB, base.a );
} );