Node: Document more modules. (#30027)

* Node: Document more modules.

* Docs: Minor fixes.

* Docs: More fixes.

src/nodes/core/LightingModel.js

@@ -10,6 +10,7 @@ class LightingModel {
 	 * This method is intended for setting up lighting model and context data
 	 * which are later used in the evaluation process.
 	 *
+	 * @abstract
 	 * @param {ContextNode} input - The current node context.
 	 * @param {StackNode} stack - The current stack.
 	 * @param {NodeBuilder} builder - The current node builder.
@@ -20,6 +21,7 @@ class LightingModel {
 	 * This method is intended for executing final tasks like final updates
 	 * to the outgoing light.
 	 *
+	 * @abstract
 	 * @param {ContextNode} input - The current node context.
 	 * @param {StackNode} stack - The current stack.
 	 * @param {NodeBuilder} builder - The current node builder.
@@ -30,6 +32,7 @@ class LightingModel {
 	 * This method is intended for implementing the direct light term and
 	 * executed during the build process of directional, point and spot light nodes.
 	 *
+	 * @abstract
 	 * @param {Object} input - The input data.
 	 * @param {StackNode} stack - The current stack.
 	 * @param {NodeBuilder} builder - The current node builder.
@@ -40,6 +43,7 @@ class LightingModel {
 	 * This method is intended for implementing the direct light term for
 	 * rect area light nodes.
 	 *
+	 * @abstract
 	 * @param {Object} input - The input data.
 	 * @param {StackNode} stack - The current stack.
 	 * @param {NodeBuilder} builder - The current node builder.
@@ -49,6 +53,7 @@ class LightingModel {
 	/**
 	 * This method is intended for implementing the indirect light term.
 	 *
+	 * @abstract
 	 * @param {ContextNode} input - The current node context.
 	 * @param {StackNode} stack - The current stack.
 	 * @param {NodeBuilder} builder - The current node builder.
@@ -60,6 +65,7 @@ class LightingModel {
 	 * Unlike other methods, this method must be called manually by the lighting
 	 * model in its indirect term.
 	 *
+	 * @abstract
 	 * @param {ContextNode} input - The current node context.
 	 * @param {StackNode} stack - The current stack.
 	 * @param {NodeBuilder} builder - The current node builder.

src/nodes/core/ParameterNode.js

@@ -1,6 +1,11 @@
 import { nodeObject } from '../tsl/TSLBase.js';
 import PropertyNode from './PropertyNode.js';
 
+/**
+ * Special version of {@link PropertyNode} which is used for parameters.
+ *
+ * @augments PropertyNode
+ */
 class ParameterNode extends PropertyNode {
 
 	static get type() {
@@ -9,10 +14,23 @@ class ParameterNode extends PropertyNode {
 
 	}
 
+	/**
+	 * Constructs a new parameter node.
+	 *
+	 * @param {String} nodeType - The type of the node.
+	 * @param {String?} [name=null] - The name of the parameter in the shader.
+	 */
 	constructor( nodeType, name = null ) {
 
 		super( nodeType, name );
 
+		/**
+		 * This flag can be used for type testing.
+		 *
+		 * @type {Boolean}
+		 * @readonly
+		 * @default true
+		 */
 		this.isParameterNode = true;
 
 	}

src/nodes/core/PropertyNode.js

@@ -1,6 +1,18 @@
 import Node from './Node.js';
 import { nodeImmutable, nodeObject } from '../tsl/TSLCore.js';
 
+/**
+ * This class represents a shader property. It can be used on
+ * to explicitely define a property and assign a value to it.
+ *
+ * ```js
+ * const threshold = property( 'float', 'threshold' ).assign( THRESHOLD );
+ *```
+ * `PropertyNode` is used by the engine to predefined common material properties
+ * for TSL code.
+ *
+ * @augments Node
+ */
 class PropertyNode extends Node {
 
 	static get type() {
@@ -9,13 +21,41 @@ class PropertyNode extends Node {
 
 	}
 
+	/**
+	 * Constructs a new property node.
+	 *
+	 * @param {String} nodeType - The type of the node.
+	 * @param {String?} [name=null] - The name of the property in the shader.
+	 * @param {Boolean} [varying=false] - Whether this property is a varying or not.
+	 */
 	constructor( nodeType, name = null, varying = false ) {
 
 		super( nodeType );
 
+		/**
+		 * The name of the property in the shader. If no name is defined,
+		 * the node system auto-generates one.
+		 *
+		 * @type {String?}
+		 * @default null
+		 */
 		this.name = name;
+
+		/**
+		 * Whether this property is a varying or not.
+		 *
+		 * @type {Boolean}
+		 * @default false
+		 */
 		this.varying = varying;
 
+		/**
+		 * This flag can be used for type testing.
+		 *
+		 * @type {Boolean}
+		 * @readonly
+		 * @default true
+		 */
 		this.isPropertyNode = true;
 
 	}
@@ -26,6 +66,12 @@ class PropertyNode extends Node {
 
 	}
 
+	/**
+	 * The method is overwritten so it always returns `true`.
+	 *
+	 * @param {NodeBuilder} builder - The current node builder.
+	 * @return {Boolean} Whether this node is global or not.
+	 */
 	isGlobal( /*builder*/ ) {
 
 		return true;

src/nodes/core/StackNode.js

@@ -2,6 +2,11 @@ import Node from './Node.js';
 import { select } from '../math/ConditionalNode.js';
 import { ShaderNode, nodeProxy, getCurrentStack, setCurrentStack } from '../tsl/TSLBase.js';
 
+/**
+ * TODO
+ *
+ * @augments Node
+ */
 class StackNode extends Node {
 
 	static get type() {
@@ -10,17 +15,54 @@ class StackNode extends Node {
 
 	}
 
+	/**
+	 * Constructs a new stack node.
+	 *
+	 * @param {StackNode?} [parent=null] - The parent stack node.
+	 */
 	constructor( parent = null ) {
 
 		super();
 
+		/**
+		 * List of nodes.
+		 *
+		 * @type {Array<Node>}
+		 */
 		this.nodes = [];
+
+		/**
+		 * The output node.
+		 *
+		 * @type {Node?}
+		 * @default null
+		 */
 		this.outputNode = null;
 
+		/**
+		 * The parent stack node.
+		 *
+		 * @type {StackNode}
+		 * @default null
+		 */
 		this.parent = parent;
 
+		/**
+		 * The current conditional node.
+		 *
+		 * @private
+		 * @type {ConditionalNode}
+		 * @default null
+		 */
 		this._currentCond = null;
 
+		/**
+		 * This flag can be used for type testing.
+		 *
+		 * @type {Boolean}
+		 * @readonly
+		 * @default true
+		 */
 		this.isStackNode = true;
 
 	}
@@ -31,6 +73,12 @@ class StackNode extends Node {
 
 	}
 
+	/**
+	 * Adds a node to this stack.
+	 *
+	 * @param {Node} node - The node to add.
+	 * @return {StackNode} A reference to this stack node.
+	 */
 	add( node ) {
 
 		this.nodes.push( node );
@@ -39,6 +87,13 @@ class StackNode extends Node {
 
 	}
 
+	/**
+	 * Represent an `if` statement in TSL.
+	 *
+	 * @param {Node} boolNode - Represents the condition.
+	 * @param {Function} method - TSL code which is executed if the condition evaluates to `true`.
+	 * @return {StackNode} A reference to this stack node.
+	 */
 	If( boolNode, method ) {
 
 		const methodNode = new ShaderNode( method );
@@ -48,6 +103,13 @@ class StackNode extends Node {
 
 	}
 
+	/**
+	 * Represent an `elseif` statement in TSL.
+	 *
+	 * @param {Node} boolNode - Represents the condition.
+	 * @param {Function} method - TSL code which is executed if the condition evaluates to `true`.
+	 * @return {StackNode} A reference to this stack node.
+	 */
 	ElseIf( boolNode, method ) {
 
 		const methodNode = new ShaderNode( method );
@@ -60,6 +122,12 @@ class StackNode extends Node {
 
 	}
 
+	/**
+	 * Represent an `else` statement in TSL.
+	 *
+	 * @param {Function} method - TSL code which is executed in the `else` case.
+	 * @return {StackNode} A reference to this stack node.
+	 */
 	Else( method ) {
 
 		this._currentCond.elseNode = new ShaderNode( method );

src/nodes/core/VaryingNode.js

@@ -60,9 +60,10 @@ class VaryingNode extends Node {
 	/**
 	 * The method is overwritten so it always returns `true`.
 	 *
+	 * @param {NodeBuilder} builder - The current node builder.
 	 * @return {Boolean} Whether this node is global or not.
 	 */
-	isGlobal() {
+	isGlobal( /*builder*/ ) {
 
 		return true;
 

src/nodes/fog/FogExp2Node.js

@@ -1,6 +1,13 @@
 import FogNode from './FogNode.js';
 import { nodeProxy } from '../tsl/TSLBase.js';
 
+/**
+ * Represents an exponential squared fog. This type of fog gives
+ * a clear view near the camera and a faster than exponentially
+ * densening fog farther from the camera.
+ *
+ * @augments FogNode
+ */
 class FogExp2Node extends FogNode {
 
 	static get type() {
@@ -9,12 +16,30 @@ class FogExp2Node extends FogNode {
 
 	}
 
+	/**
+	 * Constructs a new exponential squared fog node.
+	 *
+	 * @param {Node} colorNode - Defines the color of the fog.
+	 * @param {Node} densityNode - Defines the fog densitiy.
+	 */
 	constructor( colorNode, densityNode ) {
 
-		super( colorNode );
+		super( colorNode, null );
 
+		/**
+		 * This flag can be used for type testing.
+		 *
+		 * @type {Boolean}
+		 * @readonly
+		 * @default true
+		 */
 		this.isFogExp2Node = true;
 
+		/**
+		 * Defines the fog densitiy.
+		 *
+		 * @type {Node}
+		 */
 		this.densityNode = densityNode;
 
 	}