TSL: if, elseif, else syntax

examples/jsm/nodes/accessors/CubeTextureNode.js

@@ -77,7 +77,7 @@ class CubeTextureNode extends TextureNode {
 
 				}
 
-				builder.addFlowCode( `${propertyName} = ${snippet}` );
+				builder.addLineFlowCode( `${propertyName} = ${snippet}` );
 
 				nodeData.snippet = snippet;
 				nodeData.propertyName = propertyName;

examples/jsm/nodes/accessors/TextureNode.js

@@ -118,7 +118,7 @@ class TextureNode extends UniformNode {
 
 				}
 
-				builder.addFlowCode( `${propertyName} = ${snippet}` );
+				builder.addLineFlowCode( `${propertyName} = ${snippet}` );
 
 				nodeData.snippet = snippet;
 				nodeData.propertyName = propertyName;

examples/jsm/nodes/core/BypassNode.js

@@ -26,7 +26,7 @@ class BypassNode extends Node {
 
 		if ( snippet !== '' ) {
 
-			builder.addFlowCode( snippet );
+			builder.addLineFlowCode( snippet );
 
 		}
 

examples/jsm/nodes/core/ExpressionNode.js

@@ -18,7 +18,7 @@ class ExpressionNode extends Node {
 
 		if ( type === 'void' ) {
 
-			builder.addFlowCode( snippet );
+			builder.addLineFlowCode( snippet );
 
 		} else {
 

examples/jsm/nodes/core/Node.js

@@ -168,7 +168,7 @@ class Node {
 		}
 
 		builder.addNode( this );
-		builder.addStack( this );
+		builder.addChain( this );
 
 		/* Build stages expected results:
 			- "construct"	-> Node
@@ -233,7 +233,7 @@ class Node {
 
 		}
 
-		builder.removeStack( this );
+		builder.removeChain( this );
 
 		return result;
 

examples/jsm/nodes/core/NodeBuilder.js

@@ -57,7 +57,9 @@ class NodeBuilder {
 		this.varyings = [];
 		this.vars = { vertex: [], fragment: [], compute: [] };
 		this.flow = { code: '' };
-		this.stack = [];
+		this.chaining = [];
+		this.stack = stack();
+		this.tab = '\t';
 
 		this.context = {
 			keywords: new NodeKeywords(),
@@ -75,59 +77,59 @@ class NodeBuilder {
 
 	}
 
-	get node() {
+	setHashNode( node, hash ) {
 
-		return this.stack[ this.stack.length - 1 ];
+		this.hashNodes[ hash ] = node;
 
 	}
 
-	addStack( node ) {
-
-		/*
-		if ( this.stack.indexOf( node ) !== - 1 ) {
-
-			console.warn( 'Recursive node: ', node );
+	addNode( node ) {
 
-		}
-		*/
+		if ( this.nodes.indexOf( node ) === - 1 ) {
 
-		this.stack.push( node );
+			const updateType = node.getUpdateType( this );
 
-	}
+			if ( updateType !== NodeUpdateType.NONE ) {
 
-	removeStack( node ) {
+				this.updateNodes.push( node );
 
-		const lastStack = this.stack.pop();
+			}
 
-		if ( lastStack !== node ) {
+			this.nodes.push( node );
 
-			throw new Error( 'NodeBuilder: Invalid node stack!' );
+			this.setHashNode( node, node.getHash( this ) );
 
 		}
 
 	}
 
-	setHashNode( node, hash ) {
+	get currentNode() {
 
-		this.hashNodes[ hash ] = node;
+		return this.chaining[ this.chaining.length - 1 ];
 
 	}
 
-	addNode( node ) {
+	addChain( node ) {
 
-		if ( this.nodes.indexOf( node ) === - 1 ) {
+		/*
+		if ( this.chaining.indexOf( node ) !== - 1 ) {
 
-			const updateType = node.getUpdateType( this );
+			console.warn( 'Recursive node: ', node );
 
-			if ( updateType !== NodeUpdateType.NONE ) {
+		}
+		*/
 
-				this.updateNodes.push( node );
+		this.chaining.push( node );
 
-			}
+	}
 
-			this.nodes.push( node );
+	removeChain( node ) {
 
-			this.setHashNode( node, node.getHash( this ) );
+		const lastChain = this.chaining.pop();
+
+		if ( lastChain !== node ) {
+
+			throw new Error( 'NodeBuilder: Invalid node chaining!' );
 
 		}
 
@@ -447,9 +449,21 @@ class NodeBuilder {
 
 	}
 
-	createStack() {
+	addStack() {
+
+		this.stack = stack( this.stack );
+
+		return this.stack;
+
+	}
+
+	removeStack() {
+
+		const currentStack = this.stack;
 
-		return stack();
+		this.stack = currentStack.parent;
+
+		return currentStack;
 
 	}
 
@@ -570,16 +584,46 @@ class NodeBuilder {
 
 	}
 
-	addFlowCode( code, breakline = true ) {
+	addLineFlowCode( code ) {
+
+		if ( code === '' ) return this;
 
-		if ( breakline && ! /;\s*$/.test( code ) ) {
+		code = this.tab + code;
 
-			code += ';\n\t';
+		if ( ! /;\s*$/.test( code ) ) {
+
+			code = code + ';\n';
 
 		}
 
 		this.flow.code += code;
 
+		return this;
+
+	}
+
+	addFlowCode( code ) {
+
+		this.flow.code += code;
+
+		return this;
+
+	}
+
+	addFlowTab() {
+
+		this.tab += '\t';
+
+		return this;
+
+	}
+
+	removeFlowTab() {
+
+		this.tab = this.tab.slice( 0, - 1 );
+
+		return this;
+
 	}
 
 	getFlowData( node/*, shaderStage*/ ) {
@@ -628,7 +672,7 @@ class NodeBuilder {
 
 		if ( propertyName !== null ) {
 
-			flowData.code += `${propertyName} = ${flowData.result};\n\t`;
+			flowData.code += `${propertyName} = ${flowData.result};\n` + this.tab;
 
 		}
 

examples/jsm/nodes/core/StackNode.js

@@ -2,17 +2,22 @@ import Node, { addNodeClass } from './Node.js';
 import { assign } from '../math/OperatorNode.js';
 import { bypass } from '../core/BypassNode.js';
 import { expression } from '../core/ExpressionNode.js';
-import { nodeProxy } from '../shadernode/ShaderNode.js';
+import { cond } from '../math/CondNode.js';
+import { nodeProxy, shader } from '../shadernode/ShaderNode.js';
 
 class StackNode extends Node {
 
-	constructor() {
+	constructor( parent = null ) {
 
 		super();
 
 		this.nodes = [];
 		this.outputNode = null;
 
+		this.parent = parent;
+
+		this._currentCond = null;
+
 		this.isStackNode = true;
 
 	}
@@ -31,6 +36,35 @@ class StackNode extends Node {
 
 	}
 
+	if( boolNode, method ) {
+
+		const methodNode = shader( method );
+		this._currentCond = cond( boolNode, methodNode );
+
+		return this.add( this._currentCond );
+
+	}
+
+	elseif( boolNode, method ) {
+
+		const methodNode = shader( method );
+		const ifNode = cond( boolNode, methodNode );
+
+		this._currentCond.elseNode = ifNode;
+		this._currentCond = ifNode;
+
+		return this;
+
+	}
+
+	else( method ) {
+
+		this._currentCond.elseNode = shader( method );
+
+		return this;
+
+	}
+
 	assign( targetNode, sourceValue ) {
 
 		return this.add( assign( targetNode, sourceValue ) );

examples/jsm/nodes/core/TempNode.js

@@ -36,7 +36,7 @@ class TempNode extends Node {
 				const nodeVar = builder.getVarFromNode( this, type );
 				const propertyName = builder.getPropertyName( nodeVar );
 
-				builder.addFlowCode( `${propertyName} = ${snippet}` );
+				builder.addLineFlowCode( `${propertyName} = ${snippet}` );
 
 				nodeData.snippet = snippet;
 				nodeData.propertyName = propertyName;

examples/jsm/nodes/core/VarNode.js

@@ -70,7 +70,7 @@ class VarNode extends Node {
 
 		const propertyName = builder.getPropertyName( nodeVar );
 
-		builder.addFlowCode( `${propertyName} = ${snippet}` );
+		builder.addLineFlowCode( `${propertyName} = ${snippet}` );
 
 		return propertyName;
 

examples/jsm/nodes/gpgpu/ComputeNode.js

@@ -53,7 +53,7 @@ class ComputeNode extends Node {
 
 			if ( snippet !== '' ) {
 
-				builder.addFlowCode( snippet );
+				builder.addLineFlowCode( snippet );
 
 			}
 

examples/jsm/nodes/materials/MeshNormalNodeMaterial.js

@@ -27,7 +27,7 @@ class MeshNormalNodeMaterial extends NodeMaterial {
 
 	}
 
-	constructDiffuseColor( builder, stack ) {
+	constructDiffuseColor( { stack } ) {
 
 		const opacityNode = this.opacityNode ? float( this.opacityNode ) : materialOpacity;
 

examples/jsm/nodes/materials/MeshPhongNodeMaterial.js

@@ -42,7 +42,7 @@ class MeshPhongNodeMaterial extends NodeMaterial {
 
 	}
 
-	constructVariants( builder, stack ) {
+	constructVariants( { stack } ) {
 
 		// SHININESS
 

examples/jsm/nodes/materials/MeshStandardNodeMaterial.js

@@ -48,7 +48,7 @@ class MeshStandardNodeMaterial extends NodeMaterial {
 
 	}
 
-	constructVariants( builder, stack ) {
+	constructVariants( { stack } ) {
 
 		// METALNESS