110 lines
2.4 KiB
JavaScript
110 lines
2.4 KiB
JavaScript
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import Node, { addNodeClass } from '../core/Node.js';
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import { attribute } from '../core/AttributeNode.js';
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import { temp } from '../core/VarNode.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 { modelViewMatrix } from './ModelNode.js';
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import { nodeImmutable, vec4 } from '../shadernode/ShaderNode.js';
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class TangentNode extends Node {
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constructor( scope = TangentNode.LOCAL ) {
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super();
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this.scope = scope;
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}
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getHash( /*builder*/ ) {
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return `tangent-${this.scope}`;
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}
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getNodeType() {
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const scope = this.scope;
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if ( scope === TangentNode.GEOMETRY ) {
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return 'vec4';
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}
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return 'vec3';
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}
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generate( builder ) {
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const scope = this.scope;
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let outputNode = null;
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if ( scope === TangentNode.GEOMETRY ) {
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outputNode = attribute( 'tangent', 'vec4' );
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if ( builder.geometry.hasAttribute( 'tangent' ) === false ) {
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builder.geometry.computeTangents();
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}
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} else if ( scope === TangentNode.LOCAL ) {
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outputNode = varying( tangentGeometry.xyz );
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} else if ( scope === TangentNode.VIEW ) {
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const vertexNode = modelViewMatrix.mul( vec4( tangentLocal, 0 ) ).xyz;
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outputNode = normalize( varying( vertexNode ) );
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} else if ( scope === TangentNode.WORLD ) {
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const vertexNode = tangentView.transformDirection( cameraViewMatrix );
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outputNode = normalize( varying( vertexNode ) );
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}
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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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TangentNode.GEOMETRY = 'geometry';
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TangentNode.LOCAL = 'local';
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TangentNode.VIEW = 'view';
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TangentNode.WORLD = 'world';
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export default TangentNode;
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export const tangentGeometry = nodeImmutable( TangentNode, TangentNode.GEOMETRY );
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export const tangentLocal = nodeImmutable( TangentNode, TangentNode.LOCAL );
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export const tangentView = nodeImmutable( TangentNode, TangentNode.VIEW );
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export const tangentWorld = nodeImmutable( TangentNode, TangentNode.WORLD );
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export const transformedTangentView = temp( tangentView, 'TransformedTangentView' );
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export const transformedTangentWorld = normalize( transformedTangentView.transformDirection( cameraViewMatrix ) );
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addNodeClass( 'TangentNode', TangentNode );
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