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 {MOUSE} from "../defines.js";
import {Utils} from "../utils.js";
import {EventDispatcher} from "../EventDispatcher.js";
import cameraLight from "../utils/cameraLight.js";


 

export class FirstPersonControls extends 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 = 50;
		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.enableChangePos = true
        
        this.viewer.addEventListener('camera_changed',(e)=>{
            this.setFPCMoveSpeed(e.viewport)
        })
        

		let drag = (e) => {
            if(!this.enabled)return 
            let viewport = e.drag.dragViewport;
            if(!viewport)return
            let camera = viewport.camera 
            let mode = e.drag.mouse === MOUSE.LEFT && (!e.drag.dragViewport || e.drag.dragViewport.name == 'MainView') ? 'rotate' : 'pan'
            let moveSpeed = this.currentViewport.getMoveSpeed();
            if (e.drag.startHandled === undefined) {///???????
				e.drag.startHandled = true;

				this.dispatchEvent({type: 'start'});
			}
            
			if (mode == 'rotate') {//旋转   （为什么开启调试时旋转很慢？）
				
                //来自panoramaControl updateRotation
                
                let _matrixWorld = camera.matrixWorld
                camera.matrixWorld = new THREE.Matrix4;//unproject 前先把相机置于原点 
                
                var e1 = new THREE.Vector3(e.drag.pointerDragStart.x,e.drag.pointerDragStart.y,-1).unproject(camera)
                  , t = new THREE.Vector3(e.drag.pointer.x,e.drag.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 
                    e.drag.pointerDragStart.x > e.drag.pointer.x && (yawDelta *= -1) 
                    this.yawDelta += yawDelta
                } 
                e.drag.pointerDragStart.copy(e.drag.pointer)
                 
                camera.matrixWorld = _matrixWorld ;
              
			} else if (mode == 'pan') {//平移 
                if(viewport.unableChangePos)return
                if(camera.type == "OrthographicCamera"){
                   
                    
                    /* let ViewWidthPX = viewport.width * viewer.renderer.domElement.clientWidth
                    let ViewHeightPX = viewport.height * viewer.renderer.domElement.clientHeight
                    let cameraViewWidth = camera.right * 2
                    let cameraViewHeight = camera.top * 2; 
                     
                    moveVec.set(-1 * e.drag.mouseDelta.x * cameraViewWidth / ViewWidthPX, e.drag.mouseDelta.y * cameraViewHeight / ViewHeightPX , 0).applyQuaternion(camera.quaternion)  
                     */
                    
                    let moveVec = Utils.getOrthoCameraMoveVec(e.drag.pointerDelta, camera )//最近一次移动向量
                    
                    let handleState = window.viewer.modules.Alignment.handleState
                    if(viewport.alignment && handleState && viewport.alignment[handleState] && e.drag.intersectStart.pointcloud){
                        this.dispatchEvent({
                            type : "transformPointcloud", 
                            intersectPoint: e.intersectPoint.orthoIntersect,   
                            intersectStart: e.drag.intersectStart.orthoIntersect,
                            moveVec,        
                            pointcloud: e.drag.intersectStart.pointcloud,
                        }) 
                    }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(e.drag.pointerDragStart.x,e.drag.pointerDragStart.y, e.drag.z);
                            e.drag.translateStartPos = pointerStartPos2dReal.clone().unproject(camera);
                            /* this.viewer.dispatchEvent({ 
                                type: 'dragPanBegin', 
                                projectionMatrixInverse : e.drag.projectionMatrixInverse
                            }); */
                        }  
                        //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.drag.pointer.x,e.drag.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
                          
                    }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, camera.aspect, 1)
                        let ratio = speed  * Math.tan(THREE.Math.degToRad(fov)/2) 
                        this.translationDelta.x -= e.drag.pointerDelta.x  * ratio
                        this.translationDelta.z -= e.drag.pointerDelta.y  * ratio 
                         
                         
                    
                    }
                } 
                
			}
            //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 scroll = (e) => {
            if(!this.enabled)return   
            this.setCurrentViewport(e)            
            if(this.currentViewport.unableChangePos)return 
            let camera = e.hoverViewport.camera
            let speed = this.currentViewport.getMoveSpeed() || 1 
            if(camera.type == "OrthographicCamera"){
                let ratio
                if (e.delta < 0) {
                    ratio = 0.9 
                } else if (e.delta > 0) {
                    ratio = 1.1
                } 
                let zoom = camera.zoom * ratio
                let limit = Potree.config.OrthoCameraLimit.zoom
                zoom = THREE.Math.clamp(zoom, limit.min,limit.max )
                
                if(camera.zoom != zoom){ 
                    camera.zoom = zoom
                    camera.updateProjectionMatrix()
                }
                
                
                
            }else{
                var direction = this.currentViewport.view.direction.clone();
            
                var vec = direction.multiplyScalar(speed * 7)
                if (e.delta < 0) {
                    this.translationWorldDelta.copy(vec.negate())
                } else if (e.delta > 0) {
                    this.translationWorldDelta.copy(vec)
                }
            }
            
            
		};

		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_drop', drop);
		this.viewer.addEventListener('global_mousewheel', scroll);
		this.viewer.addEventListener('global_dblclick', dblclick);
        
        this.viewer.addEventListener('startDragging', this.setCurrentViewport.bind(this))
        /* this.viewer.addEventListener('enableChangePos', (e)=>{
            if(!this.enabled)return
            this.enableChangePos = e.canLeavePano 
        }) */


       
	}
    
    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)
                viewer.setMoveSpeed(s)
            }
            
        }
        
    }




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

     


	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.intersectPoint
		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) {
        if(!this.enabled)return
 
        
		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.currentViewport.unableChangePos){
                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();
                }
            } 
		}

		{ // 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()
            
            
		}
 

        { // decelerate over time
			let attenuation = Math.max(0, 1 - this.fadeFactor * delta);
			/* this.yawDelta *= attenuation;
			this.pitchDelta *= attenuation; 
			this.translationDelta.multiplyScalar(attenuation);
			this.translationWorldDelta.multiplyScalar(attenuation);*/
		}   
	}
};