javascript
/
three.js
mirror of https://github.com/tazdij/three.js.git


			
				
					
						
						
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<html lang="zh">
	<head>
		<meta charset="utf-8" />
		<base href="../../../" />
		<script src="page.js"></script>
		<link type="text/css" rel="stylesheet" href="page.css" />
	</head>
	<body>
		[page:EventDispatcher] &rarr;

		<h1>拖放控制器（[name]）</h1>

		<p class="desc">
		该类被用于提供一个拖放交互。
		</p>

		<h2>进口</h2>

		<p>
			[name] 是一个附加组件，必须显式导入。
			See [link:#manual/introduction/Installation Installation / Addons].
		</p>

		<code>
			import { DragControls } from 'three/addons/controls/DragControls.js';
		</code>

		<h2>代码示例</h2>

		<code>
		const controls = new DragControls( objects, camera, renderer.domElement );

		// add event listener to highlight dragged objects

		controls.addEventListener( 'dragstart', function ( event ) {

			event.object.material.emissive.set( 0xaaaaaa );

		} );

		controls.addEventListener( 'dragend', function ( event ) {

			event.object.material.emissive.set( 0x000000 );

		} );
		</code>

		<h2>例子</h2>

		<p>[example:misc_controls_drag misc / controls / drag ]</p>

		<h2>Constructor</h2>

		<h3>[name]( [param:Array objects], [param:Camera camera], [param:HTMLDOMElement domElement] )</h3>
		<p>
			<p>
			[page:Array objects]: 一组可被拖拽的3D Objects。
			</p>
			<p>
			[page:Camera camera]: 渲染场景的摄像机。
			</p>
			<p>
			[page:HTMLDOMElement domElement]: 用于事件监听的HTML元素。
			</p>
			<p>
				创建一个新的 [name] 实例。
			</p>
		</p>

		<h2>事件</h2>

		<h3>dragstart</h3>
		<p>
			当用户开始拖拽3D Objects时触发。
		</p>

		<h3>drag</h3>
		<p>
			当用户拖拽3D Objects时触发。
		</p>

		<h3>dragend</h3>
		<p>
			当用户开始完成3D Objects时触发。
		</p>

		<h3>hoveron</h3>
		<p>
			当指针移动到一个3D Object或者其某个子级上时触发。
		</p>

		<h3>hoveroff</h3>
		<p>
			当指针移出一个3D Object时触发。
		</p>

		<h2>属性</h2>

		<h3>[property:Boolean enabled]</h3>
		<p>
			是否启用控制器。
		</p>

		<h3>[property:Boolean transformGroup]</h3>
		<p>
			This option only works if the [page:DragControls.objects] array contains a single draggable group object.
			If set to *true*, [name] does not transform individual objects but the entire group. Default is *false*.
		</p>

		<h2>Methods</h2>

		<p>共有方法请参见其基类[page:EventDispatcher]。</p>

		<h3>[method:undefined activate] ()</h3>
		<p>
			添加控制器的事件监听。
		</p>

		<h3>[method:undefined deactivate] ()</h3>
		<p>
			移除控制器的事件监听。
		</p>

		<h3>[method:undefined dispose] ()</h3>
		<p>
			若不再需要该控制器，则应当调用此函数。
		</p>

		<h3>[method:Array getObjects] ()</h3>
		<p>
			Returns the array of draggable objects.
		</p>

		<h3>[method:Raycaster getRaycaster] ()</h3>
		<p>
			Returns the internal [page:Raycaster] instance that is used for intersection tests.
		</p>

		<h2>Source</h2>

		<p>
			[link:https://github.com/mrdoob/three.js/blob/master/examples/jsm/controls/DragControls.js examples/jsm/controls/DragControls.js]
		</p>
	</body>
</html>