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122 lines
2.4 KiB
122 lines
2.4 KiB
import Node, { addNodeClass } from '../core/Node.js';
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import { property } from '../core/PropertyNode.js';
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import { context as contextNode } from '../core/ContextNode.js';
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import { addNodeElement, nodeProxy } from '../shadernode/ShaderNode.js';
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class CondNode extends Node {
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constructor( condNode, ifNode, elseNode = null ) {
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super();
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this.condNode = condNode;
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this.ifNode = ifNode;
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this.elseNode = elseNode;
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}
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getNodeType( builder ) {
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const ifType = this.ifNode.getNodeType( builder );
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if ( this.elseNode !== null ) {
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const elseType = this.elseNode.getNodeType( builder );
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if ( builder.getTypeLength( elseType ) > builder.getTypeLength( ifType ) ) {
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return elseType;
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}
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}
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return ifType;
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}
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generate( builder, output ) {
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const type = this.getNodeType( builder );
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const context = { tempWrite: false };
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const nodeData = builder.getDataFromNode( this );
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if ( nodeData.nodeProperty !== undefined ) {
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return nodeData.nodeProperty;
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}
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const { ifNode, elseNode } = this;
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const needsOutput = output !== 'void';
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const nodeProperty = needsOutput ? property( type ).build( builder ) : '';
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nodeData.nodeProperty = nodeProperty;
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const nodeSnippet = contextNode( this.condNode/*, context*/ ).build( builder, 'bool' );
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builder.addFlowCode( `\n${ builder.tab }if ( ${ nodeSnippet } ) {\n\n` ).addFlowTab();
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let ifSnippet = contextNode( ifNode, context ).build( builder, type );
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if ( ifSnippet ) {
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if ( needsOutput ) {
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ifSnippet = nodeProperty + ' = ' + ifSnippet + ';';
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} else {
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ifSnippet = 'return ' + ifSnippet + ';';
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}
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}
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builder.removeFlowTab().addFlowCode( builder.tab + '\t' + ifSnippet + '\n\n' + builder.tab + '}' );
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if ( elseNode !== null ) {
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builder.addFlowCode( ' else {\n\n' ).addFlowTab();
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let elseSnippet = contextNode( elseNode, context ).build( builder, type );
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if ( elseSnippet ) {
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if ( needsOutput ) {
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elseSnippet = nodeProperty + ' = ' + elseSnippet + ';';
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} else {
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elseSnippet = 'return ' + elseSnippet + ';';
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}
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}
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builder.removeFlowTab().addFlowCode( builder.tab + '\t' + elseSnippet + '\n\n' + builder.tab + '}\n\n' );
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} else {
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builder.addFlowCode( '\n\n' );
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}
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return builder.format( nodeProperty, type, output );
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}
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}
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export default CondNode;
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export const cond = nodeProxy( CondNode );
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addNodeElement( 'cond', cond );
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addNodeClass( 'CondNode', CondNode );
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