41 lines
760 B
JavaScript
41 lines
760 B
JavaScript
import Node, { addNodeClass } from '../core/Node.js';
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import { nodeImmutable, float } from '../shadernode/ShaderNode.js';
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import { BackSide, WebGLCoordinateSystem } from 'three';
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class FrontFacingNode extends Node {
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constructor() {
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super( 'bool' );
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this.isFrontFacingNode = true;
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}
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generate( builder ) {
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const { renderer, material } = builder;
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if ( renderer.coordinateSystem === WebGLCoordinateSystem ) {
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if ( material.side === BackSide ) {
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return 'false';
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}
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}
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return builder.getFrontFacing();
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}
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}
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export default FrontFacingNode;
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export const frontFacing = nodeImmutable( FrontFacingNode );
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export const faceDirection = float( frontFacing ).mul( 2.0 ).sub( 1.0 );
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addNodeClass( 'FrontFacingNode', FrontFacingNode );
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