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Name	Size	Permission
ArrowHelper.js	2.68 KB	-rw-r--r--
AxesHelper.js	1.45 KB	-rw-r--r--
Box3Helper.js	1.26 KB	-rw-r--r--
BoxHelper.js	2.42 KB	-rw-r--r--
CameraHelper.js	8.2 KB	-rw-r--r--
DirectionalLightHelper.js	2.19 KB	-rw-r--r--
GridHelper.js	1.44 KB	-rw-r--r--
HemisphereLightHelper.js	2 KB	-rw-r--r--
PlaneHelper.js	1.7 KB	-rw-r--r--
PointLightHelper.js	1.68 KB	-rw-r--r--
PolarGridHelper.js	2.05 KB	-rw-r--r--
SkeletonHelper.js	2.79 KB	-rw-r--r--
SpotLightHelper.js	1.96 KB	-rw-r--r--

Code Editor : SpotLightHelper.js

import { Vector3 } from '../math/Vector3.js';
import { Object3D } from '../core/Object3D.js';
import { LineSegments } from '../objects/LineSegments.js';
import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
import { Float32BufferAttribute } from '../core/BufferAttribute.js';
import { BufferGeometry } from '../core/BufferGeometry.js';

const _vector = /*@__PURE__*/ new Vector3();

class SpotLightHelper extends Object3D {

constructor( light, color ) {

super();

this.light = light;

this.matrix = light.matrixWorld;
		this.matrixAutoUpdate = false;

this.color = color;

this.type = 'SpotLightHelper';

const geometry = new BufferGeometry();

const positions = [
			0, 0, 0, 	0, 0, 1,
			0, 0, 0, 	1, 0, 1,
			0, 0, 0,	- 1, 0, 1,
			0, 0, 0, 	0, 1, 1,
			0, 0, 0, 	0, - 1, 1
		];

for ( let i = 0, j = 1, l = 32; i < l; i ++, j ++ ) {

const p1 = ( i / l ) * Math.PI * 2;
			const p2 = ( j / l ) * Math.PI * 2;

positions.push(
				Math.cos( p1 ), Math.sin( p1 ), 1,
				Math.cos( p2 ), Math.sin( p2 ), 1
			);

}

geometry.setAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );

const material = new LineBasicMaterial( { fog: false, toneMapped: false } );

this.cone = new LineSegments( geometry, material );
		this.add( this.cone );

this.update();

}

dispose() {

this.cone.geometry.dispose();
		this.cone.material.dispose();

}

update() {

this.light.updateWorldMatrix( true, false );
		this.light.target.updateWorldMatrix( true, false );

const coneLength = this.light.distance ? this.light.distance : 1000;
		const coneWidth = coneLength * Math.tan( this.light.angle );

this.cone.scale.set( coneWidth, coneWidth, coneLength );

_vector.setFromMatrixPosition( this.light.target.matrixWorld );

this.cone.lookAt( _vector );

if ( this.color !== undefined ) {

this.cone.material.color.set( this.color );

} else {

this.cone.material.color.copy( this.light.color );

}

export { SpotLightHelper };

${this.title}

Code Editor : SpotLightHelper.js