Chapter 115: HemisphereLightNode

Core Idea

Module for representing hemisphere lights as nodes.

Key Concepts

• groundColorNode : UniformNode.<vec3>: Uniform node representing the light's ground color.
• lightDirectionNode : Node.<vec3>: A node representing the light's direction.
• lightPositionNode : UniformNode.<vec3>: Uniform node representing the light's position.

Reference Tables

Constructor

Signature
new HemisphereLightNode( light : HemisphereLight )

Properties

Property	Description
.groundColorNode : UniformNode.<vec3>	Uniform node representing the light's ground color.
.lightDirectionNode : Node.<vec3>	A node representing the light's direction.
.lightPositionNode : UniformNode.<vec3>	Uniform node representing the light's position.

Methods

Method	Description
.update( frame : NodeFrame )	Overwritten to updated hemisphere light specific uniforms.

Key Takeaways

1. HemisphereLightNode extends: EventDispatcher → Node → LightingNode → AnalyticLightNode
2. Most relevant properties: groundColorNode, lightDirectionNode, lightPositionNode.
3. Key methods: update.

Connects To

• EventDispatcher: parent class
• Node: parent class
• LightingNode: parent class
• AnalyticLightNode: parent class
• Source: src/nodes/lighting/HemisphereLightNode.js