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

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+import { Float32BufferAttribute } from '../core/BufferAttribute.js';
+import { BufferGeometry } from '../core/BufferGeometry.js';
+import { Object3D } from '../core/Object3D.js';
+import { CylinderGeometry } from '../geometries/CylinderGeometry.js';
+import { MeshBasicMaterial } from '../materials/MeshBasicMaterial.js';
+import { LineBasicMaterial } from '../materials/LineBasicMaterial.js';
+import { Mesh } from '../objects/Mesh.js';
+import { Line } from '../objects/Line.js';
+import { Vector3 } from '../math/Vector3.js';
+
+const _axis = /*@__PURE__*/ new Vector3();
+let _lineGeometry, _coneGeometry;
+
+class ArrowHelper extends Object3D {
+
+	// dir is assumed to be normalized
+
+	constructor( dir = new Vector3( 0, 0, 1 ), origin = new Vector3( 0, 0, 0 ), length = 1, color = 0xffff00, headLength = length * 0.2, headWidth = headLength * 0.2 ) {
+
+		super();
+
+		this.type = 'ArrowHelper';
+
+		if ( _lineGeometry === undefined ) {
+
+			_lineGeometry = new BufferGeometry();
+			_lineGeometry.setAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0, 0, 1, 0 ], 3 ) );
+
+			_coneGeometry = new CylinderGeometry( 0, 0.5, 1, 5, 1 );
+			_coneGeometry.translate( 0, - 0.5, 0 );
+
+		}
+
+		this.position.copy( origin );
+
+		this.line = new Line( _lineGeometry, new LineBasicMaterial( { color: color, toneMapped: false } ) );
+		this.line.matrixAutoUpdate = false;
+		this.add( this.line );
+
+		this.cone = new Mesh( _coneGeometry, new MeshBasicMaterial( { color: color, toneMapped: false } ) );
+		this.cone.matrixAutoUpdate = false;
+		this.add( this.cone );
+
+		this.setDirection( dir );
+		this.setLength( length, headLength, headWidth );
+
+	}
+
+	setDirection( dir ) {
+
+		// dir is assumed to be normalized
+
+		if ( dir.y > 0.99999 ) {
+
+			this.quaternion.set( 0, 0, 0, 1 );
+
+		} else if ( dir.y < - 0.99999 ) {
+
+			this.quaternion.set( 1, 0, 0, 0 );
+
+		} else {
+
+			_axis.set( dir.z, 0, - dir.x ).normalize();
+
+			const radians = Math.acos( dir.y );
+
+			this.quaternion.setFromAxisAngle( _axis, radians );
+
+		}
+
+	}
+
+	setLength( length, headLength = length * 0.2, headWidth = headLength * 0.2 ) {
+
+		this.line.scale.set( 1, Math.max( 0.0001, length - headLength ), 1 ); // see #17458
+		this.line.updateMatrix();
+
+		this.cone.scale.set( headWidth, headLength, headWidth );
+		this.cone.position.y = length;
+		this.cone.updateMatrix();
+
+	}
+
+	setColor( color ) {
+
+		this.line.material.color.set( color );
+		this.cone.material.color.set( color );
+
+	}
+
+	copy( source ) {
+
+		super.copy( source, false );
+
+		this.line.copy( source.line );
+		this.cone.copy( source.cone );
+
+		return this;
+
+	}
+
+	dispose() {
+
+		this.line.geometry.dispose();
+		this.line.material.dispose();
+		this.cone.geometry.dispose();
+		this.cone.material.dispose();
+
+	}
+
+}
+
+
+export { ArrowHelper };