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96 lines
1.9 KiB
96 lines
1.9 KiB
2 years ago
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import Node from '../core/Node.js';
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import AttributeNode from '../core/AttributeNode.js';
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import VaryingNode from '../core/VaryingNode.js';
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import ModelNode from '../accessors/ModelNode.js';
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import CameraNode from '../accessors/CameraNode.js';
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import OperatorNode from '../math/OperatorNode.js';
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import MathNode from '../math/MathNode.js';
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import SplitNode from '../utils/SplitNode.js';
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class TangentNode extends Node {
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static GEOMETRY = 'geometry';
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static LOCAL = 'local';
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static VIEW = 'view';
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static WORLD = 'world';
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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 = new AttributeNode( 'tangent', 'vec4' );
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} else if ( scope === TangentNode.LOCAL ) {
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outputNode = new VaryingNode( new SplitNode( new TangentNode( TangentNode.GEOMETRY ), 'xyz' ) );
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} else if ( scope === TangentNode.VIEW ) {
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const vertexNode = new SplitNode( new OperatorNode( '*', new ModelNode( ModelNode.VIEW_MATRIX ), new TangentNode( TangentNode.LOCAL ) ), 'xyz' );
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outputNode = new MathNode( MathNode.NORMALIZE, new VaryingNode( vertexNode ) );
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} else if ( scope === TangentNode.WORLD ) {
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const vertexNode = new MathNode( MathNode.TRANSFORM_DIRECTION, new TangentNode( TangentNode.VIEW ), new CameraNode( CameraNode.VIEW_MATRIX ) );
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outputNode = new MathNode( MathNode.NORMALIZE, new VaryingNode( 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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export default TangentNode;
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