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90 lines
2.2 KiB
90 lines
2.2 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 MathNode from '../math/MathNode.js';
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import OperatorNode from '../math/OperatorNode.js';
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class PositionNode extends Node {
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static GEOMETRY = 'geometry';
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static LOCAL = 'local';
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static WORLD = 'world';
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static WORLD_DIRECTION = 'worldDirection';
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static VIEW = 'view';
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static VIEW_DIRECTION = 'viewDirection';
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constructor( scope = PositionNode.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 `position-${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 outputNode = null;
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if ( scope === PositionNode.GEOMETRY ) {
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outputNode = new AttributeNode( 'position', 'vec3' );
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} else if ( scope === PositionNode.LOCAL ) {
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outputNode = new VaryingNode( new PositionNode( PositionNode.GEOMETRY ) );
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} else if ( scope === PositionNode.WORLD ) {
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const vertexPositionNode = new MathNode( MathNode.TRANSFORM_DIRECTION, new ModelNode( ModelNode.WORLD_MATRIX ), new PositionNode( PositionNode.LOCAL ) );
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outputNode = new VaryingNode( vertexPositionNode );
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} else if ( scope === PositionNode.VIEW ) {
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const vertexPositionNode = new OperatorNode( '*', new ModelNode( ModelNode.VIEW_MATRIX ), new PositionNode( PositionNode.LOCAL ) );
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outputNode = new VaryingNode( vertexPositionNode );
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} else if ( scope === PositionNode.VIEW_DIRECTION ) {
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const vertexPositionNode = new MathNode( MathNode.NEGATE, new PositionNode( PositionNode.VIEW ) );
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outputNode = new MathNode( MathNode.NORMALIZE, new VaryingNode( vertexPositionNode ) );
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} else if ( scope === PositionNode.WORLD_DIRECTION ) {
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const vertexPositionNode = new MathNode( MathNode.NEGATE, new PositionNode( PositionNode.WORLD ) );
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outputNode = new MathNode( MathNode.NORMALIZE, new VaryingNode( vertexPositionNode ) );
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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 PositionNode;
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