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site/game/node_modules/three/src/helpers/DirectionalLightHelper.js

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+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 };