import { Vector3 } from '../math/Vector3.js';
import { Object3D } from '../core/Object3D.js';
import { Line } from '../objects/Line.js';
import { Float32BufferAttribute } from '../core/BufferAttribute.js';
import { BufferGeometry } from '../core/BufferGeometry.js';
import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
const _v1 = /*@__PURE__*/ new Vector3();
const _v2 = /*@__PURE__*/ new Vector3();
const _v3 = /*@__PURE__*/ new Vector3();
class DirectionalLightHelper extends Object3D {
constructor( light, size, color ) {
super();
this.light = light;
this.matrix = light.matrixWorld;
this.matrixAutoUpdate = false;
this.color = color;
this.type = 'DirectionalLightHelper';
if ( size === undefined ) size = 1;
let geometry = new BufferGeometry();
geometry.setAttribute( 'position', new Float32BufferAttribute( [
- size, size, 0,
size, size, 0,
size, - size, 0,
- size, - size, 0,
- size, size, 0
], 3 ) );
const material = new LineBasicMaterial( { fog: false, toneMapped: false } );
this.lightPlane = new Line( geometry, material );
this.add( this.lightPlane );
geometry = new BufferGeometry();
geometry.setAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0, 0, 0, 1 ], 3 ) );
this.targetLine = new Line( geometry, material );
this.add( this.targetLine );
this.update();
}
dispose() {
this.lightPlane.geometry.dispose();
this.lightPlane.material.dispose();
this.targetLine.geometry.dispose();
this.targetLine.material.dispose();
}
update() {
this.light.updateWorldMatrix( true, false );
this.light.target.updateWorldMatrix( true, false );
_v1.setFromMatrixPosition( this.light.matrixWorld );
_v2.setFromMatrixPosition( this.light.target.matrixWorld );
_v3.subVectors( _v2, _v1 );
this.lightPlane.lookAt( _v2 );
if ( this.color !== undefined ) {
this.lightPlane.material.color.set( this.color );
this.targetLine.material.color.set( this.color );
} else {
this.lightPlane.material.color.copy( this.light.color );
this.targetLine.material.color.copy( this.light.color );
}
this.targetLine.lookAt( _v2 );
this.targetLine.scale.z = _v3.length();
}
}
export { DirectionalLightHelper };