Away3D - 物体的拖拽移动(Mesh上按住鼠标拖动改对象)
作者:hangge | 2015-12-05 10:20
使用 Drag3D 可以很方便的实现对象的拖拽,下面通过样例进行演示。
实现功能:
(1)在舞台背景上按住鼠标拖拽,改变摄像头角度。
(2)在方块上按住鼠标拖拽,则是移动方块位置。
(3)默认方块在XY面上移动,按下键盘1、2、3键,移动面对应改称XY、XZ、ZY上移动。
(4)为方便定位,在舞台上添加坐标轴Trident
效果图如下:
代码如下:
package{ import flash.display.Sprite; import flash.display.StageAlign; import flash.display.StageScaleMode; import flash.events.Event; import flash.events.KeyboardEvent; import flash.events.MouseEvent; import flash.ui.Keyboard; import away3d.containers.View3D; import away3d.controllers.HoverController; import away3d.debug.Trident; import away3d.entities.Mesh; import away3d.events.MouseEvent3D; import away3d.materials.TextureMaterial; import away3d.primitives.CubeGeometry; import away3d.tools.utils.Drag3D; import away3d.utils.Cast; [SWF(frameRate="60", backgroundColor="#FFFFFF")] public class S6 extends Sprite { private var _view3D:View3D; private var cameraController:HoverController;//360全景展示相机控制器 [Embed(source="assets/cubeTexture3.jpg")] private var cubeTextureClass : Class; private var cubeTextureMaterial:TextureMaterial; private var _drag:Drag3D; //记录当前是移动摄像机还是移动物体 private var _moveCamera:Boolean = true; private var _lastX:Number = 0; private var _lastY:Number = 0; private var _scale:Number = 1000; public function S6() { initEngine(); initMaterials(); initObjects(); initListeners(); } /** * 初始化引擎 */ private function initEngine():void { stage.scaleMode = StageScaleMode.NO_SCALE; stage.align = StageAlign.TOP_LEFT; // 创建一个视口 _view3D = new View3D(); _view3D.antiAlias = 4; //设置抗锯齿级别 //初始化摄像头 cameraController = new HoverController(_view3D.camera); cameraController.tiltAngle = 15; addChild(_view3D); } /** * 初始化材质 */ private function initMaterials():void { cubeTextureMaterial = new TextureMaterial(Cast.bitmapTexture(cubeTextureClass)); } /** * 初始化物体 */ private function initObjects():void { //添加 坐标系 var trident:Trident = new Trident(500); _view3D.scene.addChild(trident); // 在三维舞台中创建一个方块 var cube1:Mesh = new Mesh(new CubeGeometry(200, 200, 200, 1, 1, 1, false), cubeTextureMaterial); _view3D.scene.addChild(cube1); //开启鼠标事件支持 cube1.mouseEnabled = true; //添加 监听 cube1.addEventListener(MouseEvent3D.MOUSE_OVER, cubeMouseOver); cube1.addEventListener(MouseEvent3D.MOUSE_OUT, cubeMouseOut); cube1.addEventListener(MouseEvent3D.MOUSE_DOWN, cubeMouseDown); //给方块添加拖拽 _drag = new Drag3D(_view3D, cube1, Drag3D.PLANE_XY); } //鼠标按下 private function cubeMouseDown(event:MouseEvent3D):void { _moveCamera = false; } //鼠标移入 private function cubeMouseOver(event:MouseEvent3D):void{ var mesh:Mesh = event.object as Mesh; mesh.showBounds = true; } //鼠标移出 private function cubeMouseOut(event:MouseEvent3D):void{ var mesh:Mesh = event.object as Mesh; mesh.showBounds = false; } /** * 初始化监听 */ private function initListeners():void { addEventListener(Event.ENTER_FRAME, _onEnterFrame); //鼠标事件监听 stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown); stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUp); stage.addEventListener(MouseEvent.MOUSE_WHEEL,onWheel); stage.addEventListener(Event.RESIZE, onResize); stage.addEventListener(KeyboardEvent.KEY_UP, keyUpHandler); onResize(); } //键盘响应事件,控制方块在某个平面区域移动 private function keyUpHandler(event:KeyboardEvent):void { switch(event.keyCode) { case Keyboard.NUMBER_1: _drag.plane = Drag3D.PLANE_XY; break; case Keyboard.NUMBER_2: _drag.plane = Drag3D.PLANE_XZ; break; case Keyboard.NUMBER_3: _drag.plane = Drag3D.PLANE_ZY; break; } } /** * 渲染视图 */ private function _onEnterFrame(e:Event):void { //渲染视图 _view3D.render(); } /** * 使用舞台大小一直全屏 */ private function onResize(event:Event = null):void { _view3D.width = stage.stageWidth; _view3D.height = stage.stageHeight; } /** * 鼠标滚轮事件 */ private function onWheel(event:MouseEvent):void { if (_moveCamera) { var dist:Number = cameraController.distance / 25; if (event.delta > 0) { _scale -= dist; } else { _scale += dist; } if (_scale > 40000) { _scale = 40000; } if (_scale < 100) { _scale = 100; } cameraController.distance = _scale; } } /** * 鼠标按下事件 */ private function onMouseDown(event:MouseEvent):void { if (_moveCamera) { _view3D.stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler); _lastX = _view3D.mouseX; _lastY = _view3D.mouseY; } } /** * 鼠标弹起事件 */ private function onMouseUp(event:MouseEvent):void { _view3D.stage.removeEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler); _moveCamera = true; } /** * 鼠标移动事件 */ private function mouseMoveHandler(event:MouseEvent):void { if (_moveCamera) { //移动摄像机 var dx:Number = _view3D.mouseX - _lastX; var dy:Number = _view3D.mouseY - _lastY; cameraController.panAngle += dx; cameraController.tiltAngle += dy; _lastX = _view3D.mouseX; _lastY = _view3D.mouseY; } else { //移动 3D 小球 _drag.updateDrag(); } } } }
全部评论(0)