Chapter 119: LightingContextNode

Core Idea

LightingContextNode represents an extension of the ContextNode module by adding lighting specific context data. It represents the runtime context of LightsNode.

Key Concepts

• backdropAlphaNode : Node.<float>: A backdrop alpha node.
• backdropNode : Node.<vec3>: A backdrop node.
• lightingModel : LightingModel: The current lighting model.
• materialLightings : Array.<LightingNode>:

Reference Tables

Constructor

Signature
new LightingContextNode( lightsNode : LightsNode, lightingModel : LightingModel, materialLightings : Array.<LightingNode>, backdropNode : Node.<vec3>, backdropAlphaNode : Node.<float> )

Properties

Property	Description
.backdropAlphaNode : Node.<float>	A backdrop alpha node.
.backdropNode : Node.<vec3>	A backdrop node.
.lightingModel : LightingModel	The current lighting model.
.materialLightings : Array.<LightingNode>

Methods

Method	Description
.getContext() : Object	Returns a lighting context object.

Key Takeaways

1. LightingContextNode extends: EventDispatcher → Node → ContextNode
2. Most relevant properties: backdropAlphaNode, backdropNode, lightingModel, materialLightings.
3. Key methods: getContext.

Connects To

• EventDispatcher: parent class
• Node: parent class
• ContextNode: parent class
• Source: src/nodes/lighting/LightingContextNode.js