请问如何旋转和移动一个构件？

Question

请问有办法在选中一个构件后让他移动或旋转吗？例如选中后依某个轴向旋转一角度，或者是选中后让构件移动到其他位置？

Answer 1

可以的，你可以这样来达成：依 Y 轴旋转 180 度(以下为ES2015的代码示例)：class RotateExt extends Autodesk.Viewing.Extension {  constructor( viewer, options ) {    super();  }   load() {    viewer.addEventListener( Autodesk.Viewing.SELECTION_CHANGED_EVENT, this.onSelectionChanged );    return true;   }   unload() {    viewer.removeEventListener( Autodesk.Viewing.SELECTION_CHANGED_EVENT, this.onSelectionChanged );    return true;   }     /**!   * 关键函数   */   onSelectionChanged = ( event ) => {           const quaternion = new THREE.Quaternion();    // 设置旋转量 - 依 Y 轴旋转构件 180 度    quaternion.setFromAxisAngle( new THREE.Vector3( 0,1,0 ), Math.PI );    const model = event.model;    const fragIdsArray = event.fragIdsArray;    fragIdsArray.forEach( ( fragId, idx ) => {      const fragProxy = this.viewer.impl.getFragmentProxy( model, fragId );      fragProxy.getAnimTransform();      const position = new THREE.Vector3( fragProxy.position.x, fragProxy.position.y, fragProxy.position.z );      position.applyQuaternion( quaternion );      fragProxy.position = position;      fragProxy.quaternion.multiplyQuaternions( quaternion, fragProxy.quaternion );      if( idx === 0 ) {        const euler = new THREE.Euler();        euler.setFromQuaternion( fragProxy.quaternion, 0 );      }      fragProxy.updateAnimTransform();    });        this.viewer.impl.sceneUpdated( true );  };}Autodesk.Viewing.theExtensionManager.registerExtension( 'Autodesk.ADN.Viewing.Extension.RotateTool', RotateExt );沿X轴移动 -100 单位(以下为ES2015的代码示例)：class TranslateExt extends Autodesk.Viewing.Extension {  constructor( viewer, options ) {    super();  }   load() {    viewer.addEventListener( Autodesk.Viewing.SELECTION_CHANGED_EVENT, this.onSelectionChanged );    return true;   }   unload() {    viewer.removeEventListener( Autodesk.Viewing.SELECTION_CHANGED_EVENT, this.onSelectionChanged );    return true;   }  /**!   * 关键函数   */   onSelectionChanged = ( event ) => {        // 设置移动量 - 向 X 轴移动 -100 单位    const offset = new THREE.Vector3( -100, 0 , 0 );    const model = event.model;    const fragIdsArray = event.fragIdsArray;    fragIdsArray.forEach( ( fragId, idx ) => {      const fragProxy = this.viewer.impl.getFragmentProxy( model, fragId );      fragProxy.getAnimTransform();      const position = new THREE.Vector3(        fragProxy.position.x + offset.x,        fragProxy.position.y + offset.y,        fragProxy.position.z + offset.z      );      fragProxy.position = position;      fragProxy.updateAnimTransform();    });        this.viewer.impl.sceneUpdated( true );  };}Autodesk.Viewing.theExtensionManager.registerExtension( 'Autodesk.ADN.Viewing.Extension.TranslateTool', TranslateExt );