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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--
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Code Editor : HemisphereLightHelper.js

import { Vector3 } from '../math/Vector3.js';
import { Color } from '../math/Color.js';
import { Object3D } from '../core/Object3D.js';
import { Mesh } from '../objects/Mesh.js';
import { MeshBasicMaterial } from '../materials/MeshBasicMaterial.js';
import { OctahedronGeometry } from '../geometries/OctahedronGeometry.js';
import { BufferAttribute } from '../core/BufferAttribute.js';

const _vector = /*@__PURE__*/ new Vector3();
const _color1 = /*@__PURE__*/ new Color();
const _color2 = /*@__PURE__*/ new Color();

class HemisphereLightHelper extends Object3D {

constructor( light, size, color ) {

super();

this.light = light;

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

this.color = color;

this.type = 'HemisphereLightHelper';

const geometry = new OctahedronGeometry( size );
		geometry.rotateY( Math.PI * 0.5 );

this.material = new MeshBasicMaterial( { wireframe: true, fog: false, toneMapped: false } );
		if ( this.color === undefined ) this.material.vertexColors = true;

const position = geometry.getAttribute( 'position' );
		const colors = new Float32Array( position.count * 3 );

geometry.setAttribute( 'color', new BufferAttribute( colors, 3 ) );

this.add( new Mesh( geometry, this.material ) );

this.update();

}

dispose() {

this.children[ 0 ].geometry.dispose();
		this.children[ 0 ].material.dispose();

}

update() {

const mesh = this.children[ 0 ];

if ( this.color !== undefined ) {

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

} else {

const colors = mesh.geometry.getAttribute( 'color' );

_color1.copy( this.light.color );
			_color2.copy( this.light.groundColor );

for ( let i = 0, l = colors.count; i < l; i ++ ) {

const color = ( i < ( l / 2 ) ) ? _color1 : _color2;

colors.setXYZ( i, color.r, color.g, color.b );

}

colors.needsUpdate = true;

}

this.light.updateWorldMatrix( true, false );

mesh.lookAt( _vector.setFromMatrixPosition( this.light.matrixWorld ).negate() );

}

export { HemisphereLightHelper };

${this.title}

Code Editor : HemisphereLightHelper.js