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136 lines
2.8 KiB
136 lines
2.8 KiB
3 years ago
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<!DOCTYPE html>
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<html lang="zh">
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<head>
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<meta charset="utf-8" />
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<base href="../../../" />
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<script src="page.js"></script>
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<link type="text/css" rel="stylesheet" href="page.css" />
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</head>
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<body>
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[page:EventDispatcher] →
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<h1>拖放控制器（[name]）</h1>
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<p class="desc">
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该类被用于提供一个拖放交互。
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</p>
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<h2>代码示例</h2>
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<code>
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const controls = new DragControls( objects, camera, renderer.domElement );
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// add event listener to highlight dragged objects
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controls.addEventListener( 'dragstart', function ( event ) {
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event.object.material.emissive.set( 0xaaaaaa );
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} );
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controls.addEventListener( 'dragend', function ( event ) {
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event.object.material.emissive.set( 0x000000 );
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} );
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</code>
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<h2>例子</h2>
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<p>[example:misc_controls_drag misc / controls / drag ]</p>
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<h2>Constructor</h2>
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<h3>[name]( [param:Array objects], [param:Camera camera], [param:HTMLDOMElement domElement] )</h3>
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<p>
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<p>
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[page:Array objects]: 一组可被拖拽的3D Objects。
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</p>
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<p>
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[page:Camera camera]: 渲染场景的摄像机。
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</p>
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<p>
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[page:HTMLDOMElement domElement]: 用于事件监听的HTML元素。
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</p>
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<p>
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创建一个新的 [name] 实例。
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</p>
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</p>
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<h2>事件</h2>
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<h3>dragstart</h3>
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<p>
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当用户开始拖拽3D Objects时触发。
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</p>
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<h3>drag</h3>
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<p>
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当用户拖拽3D Objects时触发。
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</p>
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<h3>dragend</h3>
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<p>
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当用户开始完成3D Objects时触发。
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</p>
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<h3>hoveron</h3>
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<p>
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当指针移动到一个3D Object或者其某个子级上时触发。
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</p>
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<h3>hoveroff</h3>
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<p>
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当指针移出一个3D Object时触发。
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</p>
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<h2>属性</h2>
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<h3>[property:Boolean enabled]</h3>
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<p>
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是否启用控制器。
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</p>
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<h3>[property:Boolean transformGroup]</h3>
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<p>
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This option only works if the [page:DragControls.objects] array contains a single draggable group object.
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If set to *true*, [name] does not transform individual objects but the entire group. Default is *false*.
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</p>
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<h2>Methods</h2>
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<p>共有方法请参见其基类[page:EventDispatcher]。</p>
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<h3>[method:undefined activate] ()</h3>
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<p>
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添加控制器的事件监听。
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</p>
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<h3>[method:undefined deactivate] ()</h3>
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<p>
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移除控制器的事件监听。
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</p>
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<h3>[method:undefined dispose] ()</h3>
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<p>
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若不再需要该控制器，则应当调用此函数。
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</p>
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<h3>[method:Array getObjects] ()</h3>
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<p>
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Returns the array of draggable objects.
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</p>
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<h3>[method:Raycaster getRaycaster] ()</h3>
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<p>
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Returns the internal [page:Raycaster] instance that is used for intersection tests.
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</p>
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<h2>Source</h2>
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<p>
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[link:https://github.com/mrdoob/three.js/blob/master/examples/jsm/controls/DragControls.js examples/jsm/controls/DragControls.js]
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</p>
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</body>
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</html>
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