34 lines
987 B
JavaScript
34 lines
987 B
JavaScript
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import { float, Fn, vec3, vec4, min, max, mix, luminance } from 'three/tsl';
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/**
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* Applies a bleach bypass effect to the given color node.
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*
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* @tsl
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* @function
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* @param {Node<vec4>} color - The color node to apply the sepia for.
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* @param {Node<float>} [opacity=1] - Influences how strong the effect is blended with the original color.
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* @return {Node<vec4>} The updated color node.
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*/
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export const bleach = /*@__PURE__*/ Fn( ( [ color, opacity = 1 ] ) => {
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const base = color;
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const lum = luminance( base.rgb );
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const blend = vec3( lum );
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const L = min( 1.0, max( 0.0, float( 10.0 ).mul( lum.sub( 0.45 ) ) ) );
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const result1 = blend.mul( base.rgb ).mul( 2.0 );
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const result2 = float( 2.0 ).mul( blend.oneMinus() ).mul( base.rgb.oneMinus() ).oneMinus();
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const newColor = mix( result1, result2, L );
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const A2 = base.a.mul( opacity );
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const mixRGB = A2.mul( newColor.rgb );
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mixRGB.addAssign( base.rgb.mul( A2.oneMinus() ) );
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return vec4( mixRGB, base.a );
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} );
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