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📄 IESSpotLightNode.js

📊 Analysis Summary

Metric	Count
🔧 Functions	1
🧱 Classes	1
📦 Imports	3
📊 Variables & Constants	2

📚 Table of Contents

• Imports
• Variables & Constants
• Functions
• Classes

🛠️ File Location:

📂 src/nodes/lighting/IESSpotLightNode.js

📦 Imports

Name	Source
SpotLightNode	./SpotLightNode.js
texture	../accessors/TextureNode.js
vec2	../tsl/TSLBase.js

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Variables & Constants

Name	Type	Kind	Value	Exported
iesMap	any	let/var	this.light.iesMap	✗
spotAttenuation	any	let/var	null	✗

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Functions

IESSpotLightNode.getSpotAttenuation(builder: NodeBuilder, angleCosine: any): any

JSDoc:

/**
     * Overwrites the default implementation to compute an IES conform spot attenuation.
     *
     * @param {NodeBuilder} builder - The node builder.
     * @param {Node<float>} angleCosine - The angle to compute the spot attenuation for.
     * @return {Node<float>} The spot attenuation.
     */

Parameters:

• builder NodeBuilder
• angleCosine any

Returns: any

Calls:

• angleCosine.acos().mul
• texture (from ../accessors/TextureNode.js)
• vec2 (from ../tsl/TSLBase.js)
• super.getSpotAttenuation

Code

getSpotAttenuation( builder, angleCosine ) {

        const iesMap = this.light.iesMap;

        let spotAttenuation = null;

        if ( iesMap && iesMap.isTexture === true ) {

            const angle = angleCosine.acos().mul( 1.0 / Math.PI );

            spotAttenuation = texture( iesMap, vec2( angle, 0 ), 0 ).r;

        } else {

            spotAttenuation = super.getSpotAttenuation( angleCosine );

        }

        return spotAttenuation;

    }

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Classes

IESSpotLightNode

Class Code

class IESSpotLightNode extends SpotLightNode {

    static get type() {

        return 'IESSpotLightNode';

    }

    /**
     * Overwrites the default implementation to compute an IES conform spot attenuation.
     *
     * @param {NodeBuilder} builder - The node builder.
     * @param {Node<float>} angleCosine - The angle to compute the spot attenuation for.
     * @return {Node<float>} The spot attenuation.
     */
    getSpotAttenuation( builder, angleCosine ) {

        const iesMap = this.light.iesMap;

        let spotAttenuation = null;

        if ( iesMap && iesMap.isTexture === true ) {

            const angle = angleCosine.acos().mul( 1.0 / Math.PI );

            spotAttenuation = texture( iesMap, vec2( angle, 0 ), 0 ).r;

        } else {

            spotAttenuation = super.getSpotAttenuation( angleCosine );

        }

        return spotAttenuation;

    }

}

Methods

getSpotAttenuation(builder: NodeBuilder, angleCosine: any): any

Code

getSpotAttenuation( builder, angleCosine ) {

        const iesMap = this.light.iesMap;

        let spotAttenuation = null;

        if ( iesMap && iesMap.isTexture === true ) {

            const angle = angleCosine.acos().mul( 1.0 / Math.PI );

            spotAttenuation = texture( iesMap, vec2( angle, 0 ), 0 ).r;

        } else {

            spotAttenuation = super.getSpotAttenuation( angleCosine );

        }

        return spotAttenuation;

    }

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