three
Version:
JavaScript 3D library
109 lines (57 loc) • 2.03 kB
JavaScript
import Node, { addNodeClass } from './Node.js';
import { varying } from './VaryingNode.js';
import { nodeObject } from '../shadernode/ShaderNode.js';
class AttributeNode extends Node {
constructor( attributeName, nodeType = null ) {
super( nodeType );
this._attributeName = attributeName;
}
isGlobal() {
return true;
}
getHash( builder ) {
return this.getAttributeName( builder );
}
getNodeType( builder ) {
let nodeType = super.getNodeType( builder );
if ( nodeType === null ) {
const attributeName = this.getAttributeName( builder );
if ( builder.hasGeometryAttribute( attributeName ) ) {
const attribute = builder.geometry.getAttribute( attributeName );
nodeType = builder.getTypeFromAttribute( attribute );
} else {
nodeType = 'float';
}
}
return nodeType;
}
setAttributeName( attributeName ) {
this._attributeName = attributeName;
return this;
}
getAttributeName( /*builder*/ ) {
return this._attributeName;
}
generate( builder ) {
const attributeName = this.getAttributeName( builder );
const nodeType = this.getNodeType( builder );
const geometryAttribute = builder.hasGeometryAttribute( attributeName );
if ( geometryAttribute === true ) {
const attribute = builder.geometry.getAttribute( attributeName );
const attributeType = builder.getTypeFromAttribute( attribute );
const nodeAttribute = builder.getAttribute( attributeName, attributeType );
if ( builder.shaderStage === 'vertex' ) {
return builder.format( nodeAttribute.name, attributeType, nodeType );
} else {
const nodeVarying = varying( this );
return nodeVarying.build( builder, nodeType );
}
} else {
console.warn( `AttributeNode: Attribute "${ attributeName }" not found.` );
return builder.generateConst( nodeType );
}
}
}
export default AttributeNode;
export const attribute = ( name, nodeType ) => nodeObject( new AttributeNode( name, nodeType ) );
addNodeClass( 'AttributeNode', AttributeNode );