95 lines
1.7 KiB
JavaScript
95 lines
1.7 KiB
JavaScript
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import TempNode from '../core/Node.js';
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import ShaderNode from '../shadernode/ShaderNode.js';
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import { vec3, pow, mul, sub, mix, join, lessThanEqual } from '../shadernode/ShaderNodeElements.js';
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import { LinearEncoding, sRGBEncoding } from 'three';
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export const LinearToLinear = new ShaderNode( ( inputs ) => {
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return inputs.value;
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} );
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export const LinearTosRGB = new ShaderNode( ( inputs ) => {
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const { value } = inputs;
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const rgb = value.rgb;
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const a = sub( mul( pow( value.rgb, vec3( 0.41666 ) ), 1.055 ), vec3( 0.055 ) );
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const b = mul( rgb, 12.92 );
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const factor = vec3( lessThanEqual( rgb, vec3( 0.0031308 ) ) );
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const rgbResult = mix( a, b, factor );
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return join( rgbResult.r, rgbResult.g, rgbResult.b, value.a );
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} );
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const EncodingLib = {
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LinearToLinear,
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LinearTosRGB
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};
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class ColorSpaceNode extends TempNode {
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static LINEAR_TO_LINEAR = 'LinearToLinear';
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static LINEAR_TO_SRGB = 'LinearTosRGB';
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constructor( method, node ) {
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super( 'vec4' );
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this.method = method;
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this.node = node;
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}
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fromEncoding( encoding ) {
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let method = null;
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if ( encoding === LinearEncoding ) {
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method = 'Linear';
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} else if ( encoding === sRGBEncoding ) {
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method = 'sRGB';
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}
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this.method = 'LinearTo' + method;
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return this;
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}
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generate( builder ) {
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const type = this.getNodeType( builder );
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const method = this.method;
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const node = this.node;
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if ( method !== ColorSpaceNode.LINEAR_TO_LINEAR ) {
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const encodingFunctionNode = EncodingLib[ method ];
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return encodingFunctionNode( {
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value: node
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} ).build( builder, type );
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} else {
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return node.build( builder, type );
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}
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}
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}
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export default ColorSpaceNode;
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