potree-sdk/src/navigation/FirstPersonControls.js

/**
 * @author mschuetz / http://mschuetz.at
 *
 * adapted from THREE.OrbitControls by
 *
 * @author qiao / https://github.com/qiao
 * @author mrdoob / http://mrdoob.com
 * @author alteredq / http://alteredqualia.com/
 * @author WestLangley / http://github.com/WestLangley
 * @author erich666 / http://erichaines.com
 *
 *
 *
 */

import * as THREE from "../../libs/three.js/build/three.module.js";
import {Buttons} from "../defines.js";
import {Utils} from "../utils.js"; 
import cameraLight from "../utils/cameraLight.js"; 
import Common from "../utils/Common.js"; 
 
export class FirstPersonControls extends THREE.EventDispatcher {
	constructor (viewer, viewport) {
		super();
        
		this.viewer = viewer;
		this.renderer = viewer.renderer;

		this.scene = viewer.scene;
		 

		this.rotationSpeed = 200;
		this.moveSpeed = 10;
		 
       
        this.setCurrentViewport({hoverViewport:viewport, force:true}) //this.currentViewport = viewport
        
        
        
		this.keys = {
            FORWARD: ['W'.charCodeAt(0), 38],
            BACKWARD: ['S'.charCodeAt(0), 40],
            LEFT: ['A'.charCodeAt(0), 37],
            RIGHT: ['D'.charCodeAt(0), 39],
            UP: ['Q'.charCodeAt(0)],
            DOWN: ['E'.charCodeAt(0)],
            
            //SHIFT : [16],
            ALT : [18],


            Rotate_LEFT : ['L'.charCodeAt(0)],
            Rotate_RIGHT :    ['J'.charCodeAt(0)],
            Rotate_UP : ['K'.charCodeAt(0)],
            Rotate_DOWN   : ['I'.charCodeAt(0)], 

        };

		this.fadeFactor = 20;
		this.yawDelta = 0;
		this.pitchDelta = 0;
		this.translationDelta = new THREE.Vector3(0, 0, 0);
		this.translationWorldDelta = new THREE.Vector3(0, 0, 0);

		this.tweens = [];
        this.dollyStart = new THREE.Vector2
        this.dollyEnd = new THREE.Vector2
        //this.enableChangePos = true
        
        this.viewer.addEventListener('camera_changed',(e)=>{
            this.setFPCMoveSpeed(e.viewport)
        })
        

		let drag = (e) => {
            if(!this.enabled)return 
            let viewport = e.dragViewport;
            if(!viewport)return
            let camera = viewport.camera 
            let mode 
            if(e.isTouch){
                if(e.touches.length == 1){
                    mode = (!e.dragViewport || e.dragViewport.name == 'MainView') ? 'rotate' : 'pan' 
                }else if(e.touches.length == 2){
                    mode = 'scale'
                }else{
                    mode = (!e.dragViewport || e.dragViewport.name == 'MainView') ? 'pan' : 'scale' 
                } 
            }else{
                //mode = e.buttons === Buttons.LEFT && (!e.dragViewport || e.dragViewport.name == 'MainView') ? 'rotate' : 'pan'
                mode = e.buttons === Buttons.LEFT && camera.type != 'OrthographicCamera' ? 'rotate' : 'pan'
            }
            //console.log('mode  ', mode )
            let moveSpeed = this.currentViewport.getMoveSpeed();
            if (e.drag.startHandled === undefined) {///???????
				e.drag.startHandled = true;

				this.dispatchEvent({type: 'start'});
			}
            
                
            if (mode.includes('rotate')) {//旋转 
				
                //来自panoramaControl updateRotation
                if(!this.pointerDragStart){
                   return this.pointerDragStart = e.pointer.clone()
                }
                
                
                
                let view = this.scene.view;
                if(Potree.settings.rotAroundPoint && this.intersectStart && this.canMovePos(viewport) && !viewer.images360.isAtPano() && !this.viewer.inputHandler.pressedKeys[17]){//定点旋转:   以当前intersect的点为target旋转，不改点在屏幕中的位置
                    let distance = camera.position.distanceTo(this.intersectStart.location)                                               //不按下ctrl的话                 
                      
                    //按照orbitControl的方式旋转：
                    let rotationSpeed = 2.5;  
                    
                    this.yawDelta -= e.drag.pointerDelta.x * rotationSpeed;
                    this.pitchDelta += e.drag.pointerDelta.y * rotationSpeed;

                   
                    //先更新一下相机：    
                    this.update() 
                    view.applyToCamera(camera)
                    
                    //然后得到新的相机角度下，原先点在屏幕中的位置所对应的3d点现在的坐标。只需要平移一下新旧坐标差值即可。
                    let newPointerDir = viewer.inputHandler.getMouseDirection(this.intersectStart.pointer).direction.clone().multiplyScalar(distance)
                    let pivot = new THREE.Vector3().addVectors(camera.position, newPointerDir)  //新的3d点
                     
                    let moveVec = new THREE.Vector3().subVectors(pivot, this.intersectStart.location)
                     
                    this.translationWorldDelta.copy(moveVec.negate()) 
                    //立即更新下，防止因update和此drag频率不同而打滑。
                    this.update()
                    view.applyToCamera(camera)
                    
               
                }else{
                  
                    
                    let _matrixWorld = camera.matrixWorld
                    camera.matrixWorld = new THREE.Matrix4;//unproject 前先把相机置于原点 
                    
                    var e1 = new THREE.Vector3(this.pointerDragStart.x,this.pointerDragStart.y,-1).unproject(camera)
                      , t = new THREE.Vector3(e.pointer.x,e.pointer.y,-1).unproject(camera)
                      , i = Math.sqrt(e1.x * e1.x + e1.z * e1.z)
                      , n = Math.sqrt(t.x * t.x + t.z * t.z)
                      , o = Math.atan2(e1.y, i)
                      , a = Math.atan2(t.y, n);
                       
                    this.pitchDelta +=  o - a  //上下旋转
                    e1.y = 0,
                    t.y = 0; 
                    
                    var s = Math.acos(e1.dot(t) / e1.length() / t.length());
                    
                    if(!isNaN(s)){
                        var yawDelta = s    //左右旋转 
                        this.pointerDragStart.x > e.pointer.x && (yawDelta *= -1) 
                        this.yawDelta += yawDelta
                    } 
                    
                    
                    //console.log('rotate:', this.pitchDelta, e.pointer.toArray(), this.pointerDragStart.toArray())
                    
                    
                    this.pointerDragStart.copy(e.pointer)
                     
                    camera.matrixWorld = _matrixWorld ;
                    
                
                
                } 
			} 
            
            if (mode.includes('pan')) {//平移 
                if(!this.canMovePos(viewport)){
                    return
                } 
                
                if(camera.type == "OrthographicCamera"){
                   
                    //console.log(e.drag.pointerDelta, e.pointer, e.drag.end)
                    let moveVec = Utils.getOrthoCameraMoveVec(e.drag.pointerDelta, camera )//最近一次移动向量
                  
                    let pointclouds;
                    let Alignment = window.viewer.modules.Alignment
                    let MergeEditor = window.viewer.modules.MergeEditor
                    let handleState = Alignment.handleState
                    
                    let a = e.buttons === Buttons.LEFT && viewport.alignment && handleState && viewport.alignment[handleState] 
                    if(Potree.settings.editType == 'pano'){//右键平移视图、左键操作点云 
                        let PanoEditor = window.viewer.modules.PanoEditor
                             
                        if(a && PanoEditor.selectedPano){
                            if(!PanoEditor.selectedGroup || !PanoEditor.checkIfAllLinked({group:PanoEditor.selectedGroup}) ){
                                if(handleState == 'translate' && ( e.drag.intersectStart.pointclouds && Common.getMixedSet(PanoEditor.selectedClouds, e.drag.intersectStart.pointclouds).length  || PanoEditor.selectedPano.hovered)//拖拽到点云上 或 circle
                                    || handleState == 'rotate' ) 
                                {  
                                    pointclouds = PanoEditor.selectedClouds
                                }  
                            }else{
                                PanoEditor.dispatchEvent('needToDisConnect')
                                console.warn('选中的漫游点连通了整个数据集，不允许移动')
                            } 
                        }
                        
                        if(!pointclouds && e.buttons === Buttons.LEFT && viewport.rotateSide){
                            return PanoEditor.rotateSideCamera(-e.drag.pointerDelta.x)
                        }
                    }else if(Potree.settings.editType == 'merge'){ 
                        if(e.buttons === Buttons.LEFT && viewport.rotateSide){ 
                            return MergeEditor.rotateSideCamera(-e.drag.pointerDelta.x)
                        }  
                    
                    }else{ 
                        /* if(Alignment.selectedClouds && Alignment.selectedClouds.length){
                            pointclouds = a && e.drag.intersectStart.pointclouds && Common.getMixedSet(Alignment.selectedClouds, e.drag.intersectStart.pointclouds).length && Alignment.selectedClouds
                            
                        }else{ */
                            pointclouds = a && e.drag.intersectStart.pointcloud && [e.drag.intersectStart.pointcloud]
                        //}
                        
                    }
                      
                    if(pointclouds){
                        this.dispatchEvent({
                            type : "transformPointcloud", 
                            intersect: e.intersect.orthoIntersect,   
                            intersectStart: e.drag.intersectStart.orthoIntersect,
                            moveVec,        
                            pointclouds, 
                            camera
                        }) 
                    }else{ 
                        
                        this.translationWorldDelta.add(moveVec.negate()) 
                        
                    }
                    
                    
                    
                }else{  
                    if(e.drag.intersectStart){//如果拖拽着点云 
                        
                        if(e.drag.z == void 0){//拖拽开始
                            let pointerStartPos2d = e.drag.intersectStart.location.clone().project(camera);//识别到的点云点的位置
                            e.drag.z = pointerStartPos2d.z //记录z，保持拖拽物体到屏幕距离不变，所以z深度不变
                            e.drag.projectionMatrixInverse = camera.projectionMatrixInverse.clone()
                            //防止吸附到最近点上（因为鼠标所在位置并非识别到的点云点的位置，需要得到鼠标所在位置的3d坐标。）
                            let pointerStartPos2dReal = new THREE.Vector3(this.pointerDragStart.x,this.pointerDragStart.y, e.drag.z);
                            e.drag.translateStartPos = pointerStartPos2dReal.clone().unproject(camera);
                            /* this.viewer.dispatchEvent({ 
                                type: 'dragPanBegin', 
                                projectionMatrixInverse : e.drag.projectionMatrixInverse
                            }); */
                            //console.log('开始拖拽', e.pointer.clone())
                        }  
                        //拖拽的过程中将projectionMatrixInverse替换成开始拖拽时的，因为near、far一直在变，会导致unproject计算出的3d坐标改变很大而闪烁。
                        var _projectionMatrixInverse = camera.projectionMatrixInverse;
                        camera.projectionMatrixInverse = e.drag.projectionMatrixInverse;
                        
                        
                        let newPos2d = new THREE.Vector3(e.pointer.x,e.pointer.y,   e.drag.z );
                        let newPos3d = newPos2d.clone().unproject(camera);
                        let moveVec = newPos3d.clone().sub( e.drag.translateStartPos  /*  e.drag.intersectStart.location  */ );//移动相机，保持鼠标下的位置永远不变，所以用鼠标下的新位置减去鼠标下的原始位置
                        
                      
                        camera.projectionMatrixInverse = _projectionMatrixInverse
                        this.translationWorldDelta.copy(moveVec.negate())  //这里没法用add,原因未知，会跳动
                        //console.log('pan 1', this.translationWorldDelta.clone())   
                        
                         
                        
                        //四指松开剩三指时会偏移一下，暂不知道哪里的问题，或许跟开头防止点云吸附有关？
                        
                        
                        
                        
                    }else{ //如果鼠标没有找到和点云的交点，就假设移动整个模型（也可以去扩大范围寻找最近点云）
                         
                        /* let center = viewer.scene.pointclouds[0].position;
                        let radius = camera.position.distanceTo(center);
                        let ratio = radius * Math.tan(THREE.Math.degToRad(camera.fov)/2) / 1000 */
                        
                        
                        /* let speed = this.currentViewport.getMoveSpeed()
                        if(FirstPersonControls.boundPlane){
                            speed = FirstPersonControls.boundPlane.distanceToPoint(this.currentViewport.position)   
                            speed = Math.max(1 , speed) 
                        }  */
                        let lastIntersect = viewport.lastIntersect ? (viewport.lastIntersect.location || viewport.lastIntersect) : viewer.bound.center  //该viewport的最近一次鼠标和点云的交点
                        let speed = camera.position.distanceTo(lastIntersect)   
                        let fov = cameraLight.getHFOVForCamera(camera, true)
                        let ratio = speed  * Math.tan(fov/2) 
                        this.translationDelta.x -= e.drag.pointerDelta.x  * ratio
                        this.translationDelta.z -= e.drag.pointerDelta.y  * ratio 
                         //console.log('pan2', e.drag.pointerDelta)
                    }
                } 
                this.useAttenuation = false
			}
            
            
            if(mode.includes('scale')){
 
                this.dollyEnd.subVectors(e.touches[0].pointer, e.touches[1].pointer);
                //if(!this.dollyStart)return
                var scale = this.dollyEnd.length() / this.dollyStart.length()

                //console.log('scale ',scale)
                 
                let pointer = new THREE.Vector2().addVectors(e.touches[0].pointer, e.touches[1].pointer).multiplyScalar(0.5);//两个指头的中心点
                
                dolly({
                    pointer,
                    scale, camera
                })
                this.dollyStart.copy(this.dollyEnd);
                
            }
            //最好按ctrl可以变为dollhouse的那种旋转
		};

		let drop = e => {
            if(!this.enabled)return    
			this.dispatchEvent({type: 'end'});
            
		};


        let dolly = (e={})=>{
                       
            if(Potree.settings.displayMode == 'showPanos' && this.currentViewport == viewer.mainViewport/* this.currentViewport.unableChangePos */){//全景时 
                this.dispatchEvent({type:'dollyStopCauseUnable',delta:e.delta, scale:e.scale})
                return 
            }
            
            let camera = e.camera
            
            
            if(camera.type == "OrthographicCamera"){
                let ratio
                if(e.delta != void 0){//滚轮缩放
                    if(e.delta == 0){//mac
                       return 
                    }else if (e.delta < 0) {
                        ratio = 0.9 
                    } else if (e.delta > 0) {
                        ratio = 1.1
                    } 
                }else{
                    ratio = e.scale //触屏缩放
                }
                
                let zoom = camera.zoom * ratio
                let limit = camera.zoomLimit
                if(limit) zoom = THREE.Math.clamp(zoom, limit.min,limit.max )
                
                
                let pointerPos = new THREE.Vector3(e.pointer.x, e.pointer.y,0.5); 
                let oldPos = pointerPos.clone().unproject(camera);
                
                if(camera.zoom != zoom){ 
                    camera.zoom = zoom
                    camera.updateProjectionMatrix()
                }
                let newPos = pointerPos.clone().unproject(camera);
                
                //定点缩放, 恢复一下鼠标所在位置的位置改变量
                let moveVec = new THREE.Vector3().subVectors(newPos,oldPos)
                this.translationWorldDelta.add(moveVec.negate()) 
                this.useAttenuation = false
            }else{
                let speed , direction
                 
                
                if(e.delta != void 0){//滚轮缩放 
                    speed =  this.currentViewport.getMoveSpeed() * 15
                    
                    //var direction = this.currentViewport.view.direction.clone();
                    direction = this.viewer.inputHandler.getMouseDirection().direction  //定点缩放
                 
                    
                    if(e.delta == 0){//mac
                        return 
                    }else if (e.delta < 0) {
                        speed *= -1
                    } 
                }else{
                    const constantDis =  this.currentViewport.getMoveSpeed() * 200 //constantDis = 10;//常量系数，当放大一倍时前进的距离。可以调整
                    speed = (e.scale-1)*constantDis //触屏缩放
                    //pointer = new THREE.Vector2().addVectors().multiplyScalar(0.5);//两个指头的中心点
                    direction = this.viewer.inputHandler.getMouseDirection(e.pointer).direction  //定点缩放
                }
                 
                this.useAttenuation = true
                var vec = direction.multiplyScalar(speed )
                this.translationWorldDelta.copy(vec)
                
            }
        }

		let scroll = (e) => {
            if(!this.enabled || !e.hoverViewport)return 
            this.setCurrentViewport(e)
            
                
            e.camera = e.hoverViewport.camera                
            dolly(e) 
		};

		let dblclick = (e) => { 
            if(!this.enabled)return
            
            if(!Potree.settings.dblToFocusPoint)return;//调试时才可双击
            
            if(Potree.settings.displayMode == 'showPointCloud'/* !viewer.images360.isAtPano() */) this.zoomToLocation(e.mouse);
		};

		this.viewer.addEventListener('global_drag', drag);
        /* this.viewer.addEventListener('global_touchmove', (e)=>{ 
            if(!this.enabled)return
            if(e.touches.length>1){//单指的就触发上一句 
                //console.log('global_touchmove' )
                drag(e)
            }
        }); */
		this.viewer.addEventListener('global_drop', drop);
		this.viewer.addEventListener('global_mousewheel', scroll);
		this.viewer.addEventListener('global_dblclick', dblclick);
        
        
        
        let prepareScale = (e)=>{//触屏的scale 
            this.dollyStart.subVectors(e.touches[0].pointer, e.touches[1].pointer);
        }
        let prepareRotate = (e)=>{ 
            this.pointerDragStart = e.pointer.clone()  
            this.intersectStart = e.intersect && e.intersect.location && {
                location : e.intersect.location,
                pointer :  e.intersect.location.clone().project(e.dragViewport.camera) //intersect点在屏幕中的位置
            }
            //console.log('prepareRotate' )
        }
        let preparePan = (e)=>{//触屏的pan点云    还是会偏移
            this.pointerDragStart = e.pointer.clone() 
              
            e.drag.z = void 0  //清空    
            drag(e) //触屏点击时更新的pointer直接用一次drag
            //console.log('preparePan '   )
        }
        
        this.viewer.addEventListener('global_mousedown'/* 'startDragging' */, (e)=>{
            if(!this.enabled)return
            this.setCurrentViewport(e)
            prepareRotate(e) 
        })
        
        
        //注意，每次增减指头都会修改pointer，需要更新下状态
        this.viewer.addEventListener('global_touchstart', (e)=>{
            if(!this.enabled)return

            if(e.touches.length==2){//只监听开头两个指头
                prepareScale(e)
            }else if(e.touches.length>=3){
                preparePan(e)
            }
        })
        this.viewer.addEventListener('global_touchend', (e)=>{
            if(!this.enabled)return
            if(e.touches.length==2){//停止平移,开始scale
                prepareScale(e)
            }else if(e.touches.length==1){//停止scale,开始rotate
                prepareRotate(e)
            }else if(e.touches.length>=3){//重新准备下平移（因为抬起的指头可能包含平移使用的数据）,否则抬起时漂移
                preparePan(e)
            }
        })
       
        
        
        
        /* this.viewer.addEventListener('enableChangePos', (e)=>{
            if(!this.enabled)return
            this.enableChangePos = e.canLeavePano 
        }) */


       
	}
    canMovePos(viewport){
        if(viewport == viewer.mainViewport && (Potree.settings.displayMode == 'showPanos' 
        || viewer.images360.bumping || viewer.images360.latestToPano))return false
        else return true
    }
    setEnable(enabled){
        this.enabled = enabled;
         
    }

    setFPCMoveSpeed(viewport){
        if(viewport.camera.type == 'OrthographicCamera'){
            let s = 1 / viewport.camera.zoom
            viewport.setMoveSpeed(s)   
            
        }else{
            if(viewport == viewer.mainViewport && FirstPersonControls.boundPlane){
                let s = FirstPersonControls.boundPlane.distanceToPoint(viewer.mainViewport.view.position)
                s = Math.sqrt(s) / 10;
                s = Math.max(FirstPersonControls.standardSpeed , s)
                s  *= Potree.config.moveSpeedAdujust;
                viewer.setMoveSpeed(s)
            }
            
        }
        
    }




    setCurrentViewport(o={}){//add
        if(!this.enabled && !o.force )return
        if(o.hoverViewport && this.currentViewport != o.hoverViewport ){
            this.currentViewport = o.hoverViewport  
			//this.viewer.setMoveSpeed(this.currentViewport.radius/100);
            this.setFPCMoveSpeed(this.currentViewport)
        }
        if(this.currentViewport.camera.type == 'OrthographicCamera'){
            this.lockElevationOri = true
            this.lockRotation = true
        }else{
            this.lockElevationOri = false
            this.lockRotation = false
        }
    }

     


	setScene (scene) {
		this.scene = scene;
         
	}

	stop(){
		this.yawDelta = 0;
		this.pitchDelta = 0;
		this.translationDelta.set(0, 0, 0);
	}
    
    
	
	zoomToLocation(mouse){
        if(!this.enabled)return
		let camera = this.scene.getActiveCamera();
		
		/* let I = Utils.getMousePointCloudIntersection(
			mouse,
			camera,
			this.viewer,
			this.scene.pointclouds); */
        var I = this.viewer.inputHandler.intersect
		if (!I) {
			return;
		}

		let targetRadius = 0;
		{
			let minimumJumpDistance = 0.2;

			let domElement = this.renderer.domElement;
            
			let ray = Utils.mouseToRay(this.viewer.inputHandler.pointer, camera);
            let {origin, direction} = this.viewer.inputHandler.getMouseDirection()
            let raycaster = new THREE.Raycaster();
            raycaster.ray.set(origin, direction);  
            
			let nodes = I.pointcloud.nodesOnRay(I.pointcloud.visibleNodes, ray);
            
            let nodes2 = I.pointcloud.nodesOnRay(I.pointcloud.visibleNodes, raycaster.ray);
            
            
			let lastNode = nodes[nodes.length - 1];
			let radius = lastNode.getBoundingSphere(new THREE.Sphere()).radius;
			targetRadius = Math.min(this.scene.view.radius, radius);
			targetRadius = Math.max(minimumJumpDistance, targetRadius);
		}

		let d = this.scene.view.direction.multiplyScalar(-1);
		let cameraTargetPosition = new THREE.Vector3().addVectors(I.location, d.multiplyScalar(targetRadius));
		// TODO Unused: let controlsTargetPosition = I.location;

		let animationDuration = 600;
		let easing = TWEEN.Easing.Quartic.Out;

		{ // animate
			let value = {x: 0};
			let tween = new TWEEN.Tween(value).to({x: 1}, animationDuration);
			tween.easing(easing);
			this.tweens.push(tween);

			let startPos = this.scene.view.position.clone();
			let targetPos = cameraTargetPosition.clone();
			let startRadius = this.scene.view.radius;
			let targetRadius = cameraTargetPosition.distanceTo(I.location);

			tween.onUpdate(() => {
				let t = value.x;
				this.scene.view.position.x = (1 - t) * startPos.x + t * targetPos.x;
				this.scene.view.position.y = (1 - t) * startPos.y + t * targetPos.y;
				this.scene.view.position.z = (1 - t) * startPos.z + t * targetPos.z;

				this.scene.view.radius = (1 - t) * startRadius + t * targetRadius;
				this.viewer.setMoveSpeed(this.scene.view.radius / 2.5);
			});

			tween.onComplete(() => {
				this.tweens = this.tweens.filter(e => e !== tween);
			});

			tween.start();
		}
	}

	update (delta=1) {
        if(!this.enabled)return
 
        //console.log('update')
		let view = this.currentViewport.view  

		{ // cancel move animations on user input
			let changes = [ this.yawDelta,
				this.pitchDelta,
				this.translationDelta.length(),
				this.translationWorldDelta.length() ];
			let changeHappens = changes.some(e => Math.abs(e) > 0.001);
			if (changeHappens && this.tweens.length > 0) {
				this.tweens.forEach(e => e.stop());
				this.tweens = [];
			}
		}

		{ // accelerate while input is given
			let ih = this.viewer.inputHandler;

			let moveForward = this.keys.FORWARD.some(e => ih.pressedKeys[e]);
			let moveBackward = this.keys.BACKWARD.some(e => ih.pressedKeys[e]);
			let moveLeft = this.keys.LEFT.some(e => ih.pressedKeys[e]);
			let moveRight = this.keys.RIGHT.some(e => ih.pressedKeys[e]);
			let moveUp = this.keys.UP.some(e => ih.pressedKeys[e]);
			let moveDown = this.keys.DOWN.some(e => ih.pressedKeys[e]);
            
			let rotateLeft = this.keys.Rotate_LEFT.some(e => ih.pressedKeys[e]);
			let rotateRight = this.keys.Rotate_RIGHT.some(e => ih.pressedKeys[e]);
			let rotateUp = this.keys.Rotate_UP.some(e => ih.pressedKeys[e]);
			let rotateDown = this.keys.Rotate_DOWN.some(e => ih.pressedKeys[e]);

            
            this.lockElevation = this.lockElevationOri || this.keys.ALT.some(e => ih.pressedKeys[e]);
            
            
            
            if(!this.lockRotation){
                if(rotateLeft){
                    this.yawDelta -= 0.01
                }else if(rotateRight){
                    this.yawDelta += 0.01
                } 
                if(rotateUp){
                    this.pitchDelta -= 0.01
                }else if(rotateDown){
                    this.pitchDelta += 0.01
                }
            }
        
            if(this.canMovePos(this.currentViewport) && !this.lockKey){
                if(this.lockElevation){
                    let dir = view.direction;
                    dir.z = 0;
                    dir.normalize();

                    if (moveForward && moveBackward) {
                        this.translationWorldDelta.set(0, 0, 0);
                    } else if (moveForward) {
                        this.translationWorldDelta.copy(dir.multiplyScalar(this.currentViewport.getMoveSpeed()));
                    } else if (moveBackward) {
                        this.translationWorldDelta.copy(dir.multiplyScalar(-this.currentViewport.getMoveSpeed()));
                    }
                }else{
                    if (moveForward && moveBackward) {
                        this.translationDelta.y = 0;
                    } else if (moveForward) {
                        this.translationDelta.y = this.currentViewport.getMoveSpeed();
                    } else if (moveBackward) {
                        this.translationDelta.y = -this.currentViewport.getMoveSpeed();
                    }
                }

                if (moveLeft && moveRight) {
                    this.translationDelta.x = 0;
                } else if (moveLeft) {
                    this.translationDelta.x = -this.currentViewport.getMoveSpeed();
                } else if (moveRight) {
                    this.translationDelta.x = this.currentViewport.getMoveSpeed();
                }

                if (moveUp && moveDown) {
                    this.translationWorldDelta.z = 0;
                } else if (moveUp) {
                    this.translationWorldDelta.z = this.currentViewport.getMoveSpeed();
                } else if (moveDown) {
                    this.translationWorldDelta.z = -this.currentViewport.getMoveSpeed();
                }
                
                
                if(moveUp || moveDown || moveForward || moveBackward){
                    this.useAttenuation = false
                }
                
            } 
		}

		{ // apply rotation
			let yaw = view.yaw;
			let pitch = view.pitch;
             
            
			yaw += this.yawDelta /* * delta; */
			pitch += this.pitchDelta/*  * delta; */

			view.yaw = yaw;
			view.pitch = pitch;
            

            
            this.yawDelta = 0
            this.pitchDelta = 0 
		}
        if(this.translationWorldDelta.length()>0) {
           // console.log('translationDelta')
        }

		{ // apply translation
			view.translate(
				this.translationDelta.x, /* * delta, */
				this.translationDelta.y, /* * delta, */
				this.translationDelta.z, /* * delta */
			);
            this.translationDelta.set(0,0,0)  


            //if(this.translationWorldDelta.length())console.log(translationWorldDelta)
            
			view.translateWorld(
				this.translationWorldDelta.x /* * delta */,
				this.translationWorldDelta.y /* * delta */,
				this.translationWorldDelta.z /* * delta */
			);
             
            
            
            //this.translationWorldDelta.set(0,0,0)
		}

		{ // set view target according to speed
			//view.radius = 1 * this.currentViewport.getMoveSpeed();
            
            /* if(viewer.bound)  view.radius = view.position.distanceTo(viewer.bound.center)
            let speed = view.radius/100;
			this.viewer.setMoveSpeed(speed); */
            //this.setMoveSpeed()
            
            
		}
 

        if(this.useAttenuation){ //只有滚轮缩放时开启
			let attenuation = Math.max(0, 1 - this.fadeFactor * delta);
          
			 /*this.yawDelta *= attenuation;
			this.pitchDelta *= attenuation; 
			this.translationDelta.multiplyScalar(attenuation);*/
			this.translationWorldDelta.multiplyScalar(attenuation);
		}else{
            
            this.translationWorldDelta.set(0,0,0)
            
        }  
	}
};