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140 lines
2.0 KiB
140 lines
2.0 KiB
2 years ago
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import { TempNode } from '../core/TempNode.js';
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import { NodeLib } from '../core/NodeLib.js';
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class NormalNode extends TempNode {
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constructor( scope ) {
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super( 'v3' );
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this.scope = scope || NormalNode.VIEW;
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}
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getShared() {
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// if shared is false, TempNode will not create temp variable (for optimization)
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return this.scope === NormalNode.WORLD;
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}
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build( builder, output, uuid, ns ) {
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const contextNormal = builder.context[ this.scope + 'Normal' ];
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if ( contextNormal ) {
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return contextNormal.build( builder, output, uuid, ns );
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}
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return super.build( builder, output, uuid );
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}
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generate( builder, output ) {
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let result;
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switch ( this.scope ) {
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case NormalNode.VIEW:
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if ( builder.isShader( 'vertex' ) ) result = 'transformedNormal';
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else result = 'geometryNormal';
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break;
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case NormalNode.LOCAL:
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if ( builder.isShader( 'vertex' ) ) {
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result = 'objectNormal';
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} else {
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builder.requires.normal = true;
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result = 'vObjectNormal';
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}
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break;
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case NormalNode.WORLD:
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if ( builder.isShader( 'vertex' ) ) {
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result = 'inverseTransformDirection( transformedNormal, viewMatrix ).xyz';
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} else {
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builder.requires.worldNormal = true;
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result = 'vWNormal';
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}
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break;
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}
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return builder.format( result, this.getType( builder ), output );
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}
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copy( source ) {
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super.copy( source );
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this.scope = source.scope;
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return this;
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}
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toJSON( meta ) {
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let data = this.getJSONNode( meta );
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if ( ! data ) {
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data = this.createJSONNode( meta );
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data.scope = this.scope;
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}
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return data;
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}
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}
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NormalNode.LOCAL = 'local';
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NormalNode.WORLD = 'world';
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NormalNode.VIEW = 'view';
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NormalNode.prototype.nodeType = 'Normal';
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NodeLib.addKeyword( 'viewNormal', function () {
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return new NormalNode( NormalNode.VIEW );
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} );
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NodeLib.addKeyword( 'localNormal', function () {
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return new NormalNode( NormalNode.NORMAL );
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} );
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NodeLib.addKeyword( 'worldNormal', function () {
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return new NormalNode( NormalNode.WORLD );
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} );
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export { NormalNode };
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