90 lines
2.3 KiB
JavaScript
90 lines
2.3 KiB
JavaScript
import Node, { addNodeClass } from '../core/Node.js';
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import { varying } from '../core/VaryingNode.js';
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import { normalize } from '../math/MathNode.js';
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import { cameraViewMatrix } from './CameraNode.js';
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import { normalGeometry, normalLocal, normalView, normalWorld, transformedNormalView } from './NormalNode.js';
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import { tangentGeometry, tangentLocal, tangentView, tangentWorld, transformedTangentView } from './TangentNode.js';
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import { nodeImmutable } from '../shadernode/ShaderNode.js';
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class BitangentNode extends Node {
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constructor( scope = BitangentNode.LOCAL ) {
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super( 'vec3' );
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this.scope = scope;
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}
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getHash( /*builder*/ ) {
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return `bitangent-${this.scope}`;
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}
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generate( builder ) {
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const scope = this.scope;
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let crossNormalTangent;
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if ( scope === BitangentNode.GEOMETRY ) {
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crossNormalTangent = normalGeometry.cross( tangentGeometry );
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} else if ( scope === BitangentNode.LOCAL ) {
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crossNormalTangent = normalLocal.cross( tangentLocal );
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} else if ( scope === BitangentNode.VIEW ) {
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crossNormalTangent = normalView.cross( tangentView );
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} else if ( scope === BitangentNode.WORLD ) {
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crossNormalTangent = normalWorld.cross( tangentWorld );
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}
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const vertexNode = crossNormalTangent.mul( tangentGeometry.w ).xyz;
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const outputNode = normalize( varying( vertexNode ) );
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return outputNode.build( builder, this.getNodeType( builder ) );
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}
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serialize( data ) {
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super.serialize( data );
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data.scope = this.scope;
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}
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deserialize( data ) {
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super.deserialize( data );
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this.scope = data.scope;
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}
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}
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BitangentNode.GEOMETRY = 'geometry';
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BitangentNode.LOCAL = 'local';
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BitangentNode.VIEW = 'view';
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BitangentNode.WORLD = 'world';
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export default BitangentNode;
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export const bitangentGeometry = nodeImmutable( BitangentNode, BitangentNode.GEOMETRY );
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export const bitangentLocal = nodeImmutable( BitangentNode, BitangentNode.LOCAL );
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export const bitangentView = nodeImmutable( BitangentNode, BitangentNode.VIEW );
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export const bitangentWorld = nodeImmutable( BitangentNode, BitangentNode.WORLD );
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export const transformedBitangentView = normalize( transformedNormalView.cross( transformedTangentView ).mul( tangentGeometry.w ) );
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export const transformedBitangentWorld = normalize( transformedBitangentView.transformDirection( cameraViewMatrix ) );
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addNodeClass( 'BitangentNode', BitangentNode );
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