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/**
* @author alteredq / http://alteredqualia.com/
* @author mrdoob / http://mrdoob.com/
* @author WestLangley / http://github.com/WestLangley
*/
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';
function SpotLightHelper( light, color ) {
Object3D.call( this );
this.light = light;
this.light.updateMatrixWorld();
this.matrix = light.matrixWorld;
this.matrixAutoUpdate = false;
this.color = color;
var geometry = new BufferGeometry();
var 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 ( var i = 0, j = 1, l = 32; i < l; i ++, j ++ ) {
var p1 = ( i / l ) * Math.PI * 2;
var p2 = ( j / l ) * Math.PI * 2;
positions.push(
Math.cos( p1 ), Math.sin( p1 ), 1,
Math.cos( p2 ), Math.sin( p2 ), 1
);
}
geometry.addAttribute( 'position', new Float32BufferAttribute( positions, 3 ) );
var material = new LineBasicMaterial( { fog: false } );
this.cone = new LineSegments( geometry, material );
this.add( this.cone );
this.update();
}
SpotLightHelper.prototype = Object.create( Object3D.prototype );
SpotLightHelper.prototype.constructor = SpotLightHelper;
SpotLightHelper.prototype.dispose = function () {
this.cone.geometry.dispose();
this.cone.material.dispose();
};
SpotLightHelper.prototype.update = function () {
var vector = new Vector3();
return function update() {
this.light.updateMatrixWorld();
var coneLength = this.light.distance ? this.light.distance : 1000;
var 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 };
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