potree-sdk/src/ExtendPointCloudOctree.js

import * as THREE from "../libs/three.js/build/three.module.js";
 
import {ExtendPointCloudMaterial} from "./materials/ExtendPointCloudMaterial.js";
 
import {PointCloudOctree} from './PointCloudOctree.js'
import {PointSizeType } from "./defines.js";
import math from './custom/utils/math.js'

export class ExtendPointCloudOctree extends PointCloudOctree{
    constructor(geometry, material){
        material = material || new ExtendPointCloudMaterial();
        super(geometry, material)
        
        //xzw move from material  。 adaptive_point_size才使用
        /* this.visibleNodesTexture = Utils.generateDataTexture(2048, 1, new THREE.Color(0xffffff));
		this.visibleNodesTexture.minFilter = THREE.NearestFilter;
		this.visibleNodesTexture.magFilter = THREE.NearestFilter; */
        
        
        
        this.boundingBox = this.pcoGeometry.tightBoundingBox//this.pcoGeometry.boundingBox;  //boundingBox是正方体，所以换掉
		this.boundingSphere = this.boundingBox.getBoundingSphere(new THREE.Sphere());
        this.nodeMaxLevel = 0;//add
        this.maxLevel = Infinity;
        this.temp = { sizeFitToLevel:{}, opacity:{}}//add
        //add 
        
        this.panos = []
        this.matrixAutoUpdate = false   //最好禁止updateMatrix  直接使用matrixWorld
        this.orientationUser = 0  
        this.translateUser = new THREE.Vector3;
        
        this.rotateMatrix = new THREE.Matrix4;
        this.transformMatrix = new THREE.Matrix4;// 数据集的变化矩阵
        this.transformInvMatrix = new THREE.Matrix4; 
        /* this.transformMatrix2 = new THREE.Matrix4;// 数据集的变化矩阵
        this.transformInvMatrix2 = new THREE.Matrix4;  */
        this.rotateInvMatrix = new THREE.Matrix4; 
        
        this.material.spacing = this.pcoGeometry.spacing;//初始化一下 以便于设置pointsize
        this.nodeMaxLevelPredict = this.predictNodeMaxLevel()//预测maxNodeLevel  
        this.testMaxNodeCount = this.testMaxNodeCount2 = 0
        
        
        this._visible = true;
        this.pcoGeometry.addEventListener('updateNodeMaxLevel', this.updateNodeMaxLevel.bind(this))
        this.isPointcloud = true    //add
    }
    
    /* 
    
    注释：node的level从最大的box 0开始。
    且加载任意一个node必定也会加载它的所有祖先。（如visibleNodes中有一个level为4，则一定有3,2,1,0） 
    visibleNodes就是所有可见的node，比如：
    如果相机在0这个位置朝下，这时候的visibleNodes中只有一个level为0的node；
    而如果朝上看，上方的几个node如果在视野中占据足够大的位置的话，就会加载。
    如果相机在2这个位置朝上，这时候的visibleNodes中所包含的level为： 0,1,2
    
    ________________
    |   |   |       |
    |__2|   |       |
    |     1 |   1   |
    |_______|_______|
    |               |    
    |               |    
    |      0        |    
    |_______________|
    
    查看box可在potree中开启
     */
     
    updateNodeMaxLevel(e){//目前点云包含node的最高level  
        var level = Math.max(e.level, this.nodeMaxLevel)
        if(level != this.nodeMaxLevel){
            this.nodeMaxLevel = level 
            //viewer.dispatchEvent({type:'updateNodeMaxLevel', pointcloud: this, nodeMaxLevel:level}) 
             
            //console.log('updateNodeMaxLevel ' + this.dataset_id + " : "+ this.nodeMaxLevel)                
              
            this.setPointLevel()//重新计算
             
            if(!Potree.settings.sizeFitToLevel){
                this.changePointSize() 
            }   
        }
    }//注：在没有加载到真实的 nodeMaxLevel之前，点云会显示得偏大
      
     
     
   //panoEdit时比预测值小很多？
     
    testMaxNodeLevel(camera){//手动使maxLevel达到最高，从而迫使updateNodeMaxLevel。  因为Potree.settings.pointDensity 不为 'high'时，maxLevel不是所加载的最高，就很容易加载不出下一个层级，导致无法知道nodeMaxLevel
        if(this.testMaxNodeLevelDone ) return
        //if(this.nodeMaxLevel > this.nodeMaxLevelPredict.min  )return 
        
        
        if( this.nodeMaxLevel==0 )return true
        if(camera.type == "OrthographicCamera" || this.testMaxNodeCount < 50){
            if(!Potree.Utils.isInsideFrustum(this.bound, camera)){
                return true 
            }    
        }else if( !viewer.atDatasets.includes(this))return true //否则老远就count++
          
         
        
         
        let levels = this.visibleNodes.map(e=>e.getLevel())
        let actMaxLevel = Math.max.apply(null, levels) //实际加载到的最高的node level
        if(actMaxLevel <  this.maxLevel)return true// 还没加载到能加载到的最高。  但在细节设置较低时，排除作用微弱。
        
         
        //尝试加载出更高级的level 
        let old = this.maxLevel
        this.maxLevel = 12;
        //var visibleNodes1 = this.visibleNodes.map(e=>e.getLevel())
        //console.log('visibleNodes1',visibleNodes1)
        Potree.updatePointClouds([this],  viewer.scene.getActiveCamera(), viewer.mainViewport.resolution );
        //不在camera可视范围内还是加载不出来。即使临时修改位置
        
        
        var visibleNodes2 = this.visibleNodes.map(e=>e.getLevel())
        //console.log('visibleNodes2',visibleNodes2) 
        this.maxLevel = old;
        
        
        
        this.testMaxNodeCount ++
        viewer.testMaxNodeCount ++
        
        //console.log('testMaxNodeCount', this.dataset_id,  this.testMaxNodeCount, 'nodeMaxLevel', this.nodeMaxLevel )
        
        
        if( this.testMaxNodeCount == Potree.config.testNodeCount1 ){//差不多等当前所在数据集nodeMaxLevel加载出来
            this.changePointSize()  //重新更新一下大小。因之前用的是nodeMaxLevelPredict （防止刚开始因nodeMaxLevel没涨完，导致过大的点云突然出现
        }

        
        
        if(this.testMaxNodeCount > 100){
            console.log('testMaxNodeLevel次数超出，强制结束：',this.dataset_id,  this.nodeMaxLevel,  this.nodeMaxLevelPredict.min) 
            this.testMaxNodeLevelDone = 'moreThanMaxCount'
            return; //在可以看见点云的情况下，超时，有可能是预测的max是错的    
        }
        if(this.nodeMaxLevel < this.nodeMaxLevelPredict.min) return  true //仍需要继续testMaxNodeLevel
        
        this.testMaxNodeCount2 ++; // 已经> this.nodeMaxLevelPredict.min 后，开始计数。因为min可能低于真实nodeMaxLevel所以要再试几次
        
        
        
        if(this.testMaxNodeCount2 < 50)  return  true //再试几次 （ 主要是细节调得低时需要多测几次才加载到
        this.testMaxNodeLevelDone = true
        
        
           
         
        
    }       
      
      
     
    updateMatrixWorld(force){//add
        super.updateMatrixWorld(force);
        this.matrixWorldInverse = this.matrixWorld.clone().invert(); 
    } 
     
    
    setPointLevel(){
        
        var pointDensity = Potree.settings.pointDensity
        var config = Potree.config.pointDensity[pointDensity];
        if(!config)return
        
        
        /* if(this.testingMaxLevel){
            this.maxLevel = 12;//先加载到最大的直到测试完毕。由于5个level为一组来加载，所以如果写4最高能加载到5，如果写5最高能加载到下一个级别的最高也就是10
            //console.log('maxLevel: '+e.maxLevel +  ' testingMaxLevel中 '  )                                
        }else{ */
            let percent = config.percentByUser && Potree.settings.UserDensityPercent != void 0  ? Potree.settings.UserDensityPercent : config.maxLevelPercent  
            this.maxLevel = Math.round( percent * this.nodeMaxLevel); 
            //console.log('maxLevel: '+e.maxLevel +  ',   density : '+Potree.settings.pointDensity,  ",  percent :"+percent);
            
            if(Potree.settings.sizeFitToLevel){
                this.changePointSize() 
            } 
            this.changePointOpacity()
        //}   
        viewer.dealBeforeRender || viewer.dispatchEvent('content_changed')  
    }
    
    //预测可能的nodeMaxLevel:
     
    predictNodeMaxLevel(){//预测maxNodeLevel。  可能只适用于我们相机拍的点云
        let spacing = {min:0.005, max:0.014};//最小节的两点间的距离  ，获得方法：spacing / Math.pow(2, nodeMaxLevel)。 目前观测的我们自己拍的这个数值的范围大概是这样
        let min = Math.log2(this.material.spacing / spacing.max); //有见过最大是0.01368 
        let max = Math.log2(this.material.spacing / spacing.min); //大部分是 0.006
        //console.log('predictNodeMaxLevel:', this.name ,  min, max ) 
    
    
        return {min, max}
    } 
    
    getHighestNodeSpacing(){
        return this.material.spacing / Math.pow(2, this.nodeMaxLevel) //前提是这个nodeMaxLevel是准确的
    } 
    
    updateMaterial (material, visibleNodes, camera, renderer, resolution) {//改
		material.fov = camera.fov * (Math.PI / 180);
		/* material.screenWidth = renderer.domElement.clientWidth;
		material.screenHeight = renderer.domElement.clientHeight; */
        material.resolution = resolution 
		material.spacing = this.pcoGeometry.spacing; // * Math.max(this.scale.x, this.scale.y, this.scale.z); 
		material.near = camera.near;
		material.far = camera.far;
		material.uniforms.octreeSize.value = this.pcoGeometry.boundingBox.getSize(new THREE.Vector3()).x;
	} 
    
    pick(viewer, viewport, camera, ray, params = {}){//改
  
		let renderer = viewer.renderer;
		let pRenderer = viewer.pRenderer;

		viewer.addTimeMark('pick','start')

		let getVal = (a, b) => a != void 0 ? a : b;
        
        
        let r0 = this.nodeMaxLevel > 0 ? this.maxLevel/this.nodeMaxLevel : 0.5
        let pickWindowSize_ = THREE.Math.clamp( Math.round((1.1-r0)*80),  5, 100)
		let pickWindowSize = getVal(params.pickWindowSize, pickWindowSize_    ); /* 65 */ //拾取像素边长，越小越精准，但点云稀疏的话可能容易出现识别不到的情况。 另外左下侧会有缝隙无法识别到，缝隙大小和这个值有关//突然发现pickWindowSize在一百以内的变化对pick费时影响甚微，1和100差1毫秒不到，但400时会多4毫秒
            
        if(camera.type == 'OrthographicCamera'){
            var cameraDir = new THREE.Vector3(0,0,-1).applyQuaternion(camera.quaternion) 
            pickWindowSize *= 4  //pointsize比较大时截取太小会没多少点可以选
        }     
            
            
		let pickOutsideClipRegion = getVal(params.pickOutsideClipRegion, false);

		let size = viewport ? viewport.resolution : renderer.getSize(new THREE.Vector2());

		let width = Math.ceil(getVal(params.width, size.width)); //renderTarget大小。影响识别精度  
		let height = Math.ceil(getVal(params.height, size.height));
        
        let screenshot = ()=>{
            if(window.testScreen){            
                let dataUrl = Potree.Utils.renderTargetToDataUrl(pickState.renderTarget, width, height, renderer)
             
                Common.downloadFile(dataUrl, 'screenshot.jpg')  //为什么图片上不是只有pickWindowSize区域有颜色？？
                window.testScreen = 0
            } 
        }
        
      

		let pointSizeType = getVal(params.pointSizeType, this.material.pointSizeType);
		let pointSize = getVal(params.pointSize, this.material.size);
 
		let nodes = this.nodesOnRay(this.visibleNodes, ray);
 
		if (nodes.length === 0) { 
            
			return null;
		}
        //console.log('nodes.length != 0', this.name)
		if (!this.pickState) {
			let scene = new THREE.Scene();

			let material = new ExtendPointCloudMaterial();
			material.activeAttributeName = "indices";

			let renderTarget = new THREE.WebGLRenderTarget(
				1, 1,
				{ minFilter: THREE.LinearFilter,
					magFilter: THREE.NearestFilter,
					format: THREE.RGBAFormat }
			);

			this.pickState = {
				renderTarget: renderTarget,
				material: material,
				scene: scene
			};
		};

		let pickState = this.pickState;
		let pickMaterial = pickState.material;

		{ // update pick material
			pickMaterial.pointSizeType = pointSizeType;
			//pickMaterial.shape = this.material.shape;
			pickMaterial.shape = Potree.PointShape.PARABOLOID;

			pickMaterial.uniforms.uFilterReturnNumberRange.value = this.material.uniforms.uFilterReturnNumberRange.value;
			pickMaterial.uniforms.uFilterNumberOfReturnsRange.value = this.material.uniforms.uFilterNumberOfReturnsRange.value;
			pickMaterial.uniforms.uFilterGPSTimeClipRange.value = this.material.uniforms.uFilterGPSTimeClipRange.value;
			pickMaterial.uniforms.uFilterPointSourceIDClipRange.value = this.material.uniforms.uFilterPointSourceIDClipRange.value;

			pickMaterial.activeAttributeName = "indices";

			pickMaterial.size = pointSize;
			pickMaterial.uniforms.minSize.value = this.material.uniforms.minSize.value;
			pickMaterial.uniforms.maxSize.value = this.material.uniforms.maxSize.value;
			pickMaterial.classification = this.material.classification;
			pickMaterial.recomputeClassification();
 
            //pickClipped判断转移到上一层函数 
            let {bigClipInBox,clipBoxes_in,clipBoxes_out} = this.material
            pickMaterial.setClipBoxes(bigClipInBox, clipBoxes_in, clipBoxes_out, []) 
             
			this.updateMaterial(pickMaterial, nodes, camera, renderer, new THREE.Vector2(width, height));
		}

		pickState.renderTarget.setSize(width, height); //仅绘制屏幕大小的，而不乘以devicePixelRatio

		let pixelPos = new THREE.Vector2(params.x, params.y);

		let gl = renderer.getContext();
		gl.enable(gl.SCISSOR_TEST);
		gl.scissor(  //规定渲染范围，只渲染一小块
			parseInt(pixelPos.x - (pickWindowSize - 1) / 2),
			parseInt(pixelPos.y - (pickWindowSize - 1) / 2),
			parseInt(pickWindowSize), parseInt(pickWindowSize));


		renderer.state.buffers.depth.setTest(pickMaterial.depthTest);
		renderer.state.buffers.depth.setMask(pickMaterial.depthWrite);
		renderer.state.setBlending(THREE.NoBlending);
		 

		{ // RENDER
			renderer.setRenderTarget(pickState.renderTarget);
			gl.clearColor(0, 0, 0, 0);
			renderer.clear(true, true, true);

			let tmp = this.material;
			this.material = pickMaterial;
            
			pRenderer.renderOctree(this, nodes, camera, pickState.renderTarget);
            screenshot();


			this.material = tmp;
		}

		let clamp = (number, min, max) => Math.min(Math.max(min, number), max);

		let x = parseInt(clamp(pixelPos.x - (pickWindowSize - 1) / 2, 0, width));
		let y = parseInt(clamp(pixelPos.y - (pickWindowSize - 1) / 2, 0, height));
		/* let w = parseInt(Math.min(x + pickWindowSize, width) - x);
		let h = parseInt(Math.min(y + pickWindowSize, height) - y); */
        
		let pixelCount = pickWindowSize * pickWindowSize//w * h;
		let buffer = new Uint8Array(4 * pixelCount);
        //w<pickWindowSize会报错
    
		gl.readPixels(x, y, pickWindowSize, pickWindowSize, gl.RGBA, gl.UNSIGNED_BYTE, buffer); //这句花费最多时间 pc:2-4， 即使只有1*1像素
 
		renderer.setRenderTarget(null);
		renderer.state.reset();
		renderer.setScissorTest(false);
		gl.disable(gl.SCISSOR_TEST);

		let pixels = buffer;
		let ibuffer = new Uint32Array(buffer.buffer); //四个数整合成一个

		// find closest hit inside pixelWindow boundaries
		let min = Number.MAX_VALUE;
		let hits = [], hits2 = [], rSquare;
        
        if(!params.all){
            let r = THREE.Math.clamp(Math.floor(pickWindowSize / 2),1, 40);
            rSquare = r * r
        }
        
		for (let u = 0; u < pickWindowSize; u++) {
			for (let v = 0; v < pickWindowSize; v++) {
				let offset = (u + v * pickWindowSize);
				let distance = Math.pow(u - (pickWindowSize - 1) / 2, 2) + Math.pow(v - (pickWindowSize - 1) / 2, 2);

				let pcIndex = pixels[4 * offset + 3];//nodes index（第四位）
				pixels[4 * offset + 3] = 0; //去除nodes index后剩下的是index（前三位）
				let pIndex = ibuffer[offset]; //index

				if(!(pcIndex === 0 && pIndex === 0) && (pcIndex !== undefined) && (pIndex !== undefined)){
					let hit = {
						pIndex: pIndex,
						pcIndex: pcIndex,
						distanceToCenter: distance
					};

					if(params.all){
						hits.push(hit);
					}else{
						if(hits.length > 0){//最后选取的是最靠近鼠标的那个pick
							if(distance < hits[0].distanceToCenter){
								hits[0] = hit;
							} 
						}else{
							hits.push(hit);
						}
                        
                        if(distance < rSquare) hits2.push(hit);  //add
                         
					} 
				}
			}
		}
        
        if(!params.all){
            if(hits2.length){//add 
                hits = hits2
            } 
        }
		
		// { // DEBUG: show panel with pick image
		// 	let img = Utils.pixelsArrayToImage(buffer, w, h);
		// 	let screenshot = img.src;
		
		// 	if(!this.debugDIV){
		// 		this.debugDIV = $(`
		// 			<div id="pickDebug"
		// 			style="position: absolute;
		// 			right: 400px; width: 300px;
		// 			bottom: 44px; width: 300px;
		// 			z-index: 1000;
		// 			"></div>`);
		// 		$(document.body).append(this.debugDIV);
		// 	}
		
		// 	this.debugDIV.empty();
		// 	this.debugDIV.append($(`<img src="${screenshot}"
		// 		style="transform: scaleY(-1); width: 300px"/>`));
		// 	//$(this.debugWindow.document).append($(`<img src="${screenshot}"/>`));
		// 	//this.debugWindow.document.write('<img src="'+screenshot+'"/>');
		// }


		for(let hit of hits){
			let point = {};

			if (!nodes[hit.pcIndex]) {
				return null;
			}

			let node = nodes[hit.pcIndex];
			let pc = node.sceneNode;
			let geometry = node.geometryNode.geometry;

			for(let attributeName in geometry.attributes){
				let attribute = geometry.attributes[attributeName];

				if (attributeName === 'position') {
					let x = attribute.array[3 * hit.pIndex + 0];
					let y = attribute.array[3 * hit.pIndex + 1];
					let z = attribute.array[3 * hit.pIndex + 2];

					let position = new THREE.Vector3(x, y, z);
                    
					position.applyMatrix4( pc.matrixWorld );
                    
					point[attributeName] = position;
                    
                    //add
                    if(!params.all){
                        if(camera.type == 'OrthographicCamera'){
                            let vec = new THREE.Vector3().subVectors(position, camera.position)
                            hit.disSquare = vec.projectOnVector( cameraDir ).length();  //只考虑到相机的垂直距离 
                        }else{  
                            hit.disSquare = camera.position.distanceTo(position)
                        }  
                    }
				} else if (attributeName === 'indices') {

				} else {

					let values = attribute.array.slice(attribute.itemSize * hit.pIndex, attribute.itemSize * (hit.pIndex + 1)) ;

					if(attribute.potree){
						const {scale, offset} = attribute.potree;
						values = values.map(v => v / scale + offset);
					}

					point[attributeName] = values;

					//debugger;
					//if (values.itemSize === 1) {
					//	point[attribute.name] = values.array[hit.pIndex];
					//} else {
					//	let value = [];
					//	for (let j = 0; j < values.itemSize; j++) {
					//		value.push(values.array[values.itemSize * hit.pIndex + j]);
					//	}
					//	point[attribute.name] = value;
					//}
				}
                
			}

			hit.point = point;
		}
        
        
        viewer.addTimeMark('pick','end')
        
		if(params.all){
			return hits.map(hit => hit.point);
		}else{
			if(hits.length === 0){
				return null;
			}else{
                //为了防止透过点云缝隙，选到后排的点云，将选取的位置离相机的距离考虑进去。倾向选择离相机近、且离鼠标位置近的点。（否则按照原方案只选离鼠标位置最近的，可能从高楼不小心走到下层，导航选点也是）
                let sorted1 = hits.sort( (a, b) => a.disSquare - b.disSquare  ).slice();
                
                let nearest = sorted1[0]  //return nearest.point;  //直接用最近点 在点云稀疏时不太跟手，如地面上，最近点往往在鼠标下方
                let r = 10      
                  
                hits.forEach( hit=>{
                    let disDiff = hit.disSquare - nearest.disSquare //和最近点的偏差 
                    hit.disDiff = disDiff 
                    hit.score = -hit.distanceToCenter - disDiff * r
                })
                
                let sorted2 = hits.sort( (a, b) => b.score - a.score  );
                   
                //console.log(sorted2[0].point.position.z ) 
                return sorted2[0].point;
			}
		}

	} 


    // 设置点大小
    changePointSize(num, sizeFitToLevel) {
        let size, nodeMaxLevel
        
        let dontRender = viewer.dealBeforeRender
         
        if(this.material.pointSizeType != PointSizeType.ATTENUATED){
            num && (size = num / Potree.config.material.realPointSize / 1.3)
        }else{
            let num_ = num
            if (num_ == void 0) {
                num_ = this.temp.pointSize
            } else {
                this.temp.pointSize = num_ 
            }
            num_ = num_ / (Potree.config.material.realPointSize / Potree.config.material.pointSize) //兼容 
               
            num_ = Math.pow(num_, 1.05) * 6 
             
            
            nodeMaxLevel = this.testMaxNodeCount >= Potree.config.testNodeCount1 ? this.nodeMaxLevel : this.nodeMaxLevelPredict.max //防止刚开始因nodeMaxLevel没涨完，导致过大的点云突然出现
            
            if(sizeFitToLevel || Potree.settings.sizeFitToLevel){//按照点云质量来调整的版本：    近似将pointSizeType换成ADAPTIVE
                let str = this.temp.pointSize+':'+this.maxLevel+':'+ nodeMaxLevel
                let value = this.temp.sizeFitToLevel[str]  //储存。防止每次渲染（反复切换density）都要算。
                if(value){
                    size = value
                }else{
                    
                    let base = this.material.spacing / Math.pow(2, this.maxLevel) //点云大小在level为0时设置为spacing，每长一级，大小就除以2.  （不同场景还是会有偏差）
                    let r = nodeMaxLevel > 0 ? this.maxLevel /  nodeMaxLevel : 0.5  //越大，越精细，需要越缩小
                    base *=  nodeMaxLevel > 0 ? Math.max(0.1, Math.pow(r, 3*r+0.3 )) : 0.1 //低质量的缩小点,因为视觉上看太大了。navvis是不铺满的，我们也留一点缝隙(但是ortho是不用缩小的，如果能分开判断就好了)
                    
                    //base *=  nodeMaxLevel > 0 ? Math.max(0.1, Math.pow(this.maxLevel /  nodeMaxLevel, 1.1)) : 0.1 //低质量的缩小点,因为视觉上看太大了。navvis是不铺满的，我们也留一点缝隙(但是ortho是不用缩小的，如果能分开判断就好了)

                    size = base * 5 * num_/*  * window.devicePixelRatio */
                    //在t-8BCqxQAr93 会议室 和 t-e2Kb2iU 隧道 两个场景里调节，因为它们的spacing相差较大，观察会议室墙壁的龟裂程度
                    this.temp.sizeFitToLevel[str] = size
                }
            }else{ 
            
                /* let base = 0.007; */ let base = this.material.spacing / Math.pow(2,  nodeMaxLevel) //点云大小在level为0时设置为spacing，每长一级，大小就除以2
                //base的数值理论上应该是右侧算出来的，但发现有的场景nodeMaxLevel和nodeMaxLevelPredict差别较大的点云显示也过大，而直接换成固定值反而可以适应所有场景。该固定值来源于 getHighestNodeSpacing 最小值，修改了下。(会不会是我们的相机其实该值是固定的，根据该值算出的spacing才是有误差的？ 如果换了相机是否要改值？）
                //2022-12-21又换回非固定值。因为有的场景如SS-t-t01myDqnfE的两个数据集密集程度差别很大，应该将稀疏点云的大小设置的大些。 但是这样的缺点是两个数据集因相接处有大有小无法融合。
                size = base * 5 * num_ /* * window.devicePixelRatio  */
            } 
            
        }  
        //console.log('changePointSize:'  + this.dataset_id + ' , num: ' + (num && num.toPrecision(3)) + ' , size: ' + size.toPrecision(3),  'nodeMaxLevel', nodeMaxLevel.toPrecision(3), 'testMaxNodeCount',this.testMaxNodeCount     /* this.material.spacing */)
        if(size){
            if(Potree.settings.sortCloudMat){//被废弃，不给material分组了
                this.size = size;this.material.size = size
            }else{
                this.material.size = size
            }
        }
        dontRender || viewer.dispatchEvent('content_changed')     
         
    }  
    
    
    
    // 设置点透明度
    changePointOpacity(num, canMoreThanOne ) {
        //num:0-1   navvis用的是亮度
        if (num == void 0) {
            num = this.temp.pointOpacity
        } else {
            this.temp.pointOpacity = num
        }
        let dontRender = viewer.dealBeforeRender //在执行beforeRender时更改的话不要发送content_changed 尤其分屏
        
        
        if(Potree.settings.notAdditiveBlending){ 
            return this.material.opacity = num
        }
        let opacity
        if (num == 1) {
            opacity = 1
        } else { 

            let str = (Potree.settings.sizeFitToLevel?'sizeFit:':'')+ (canMoreThanOne ? 'canMoreThanOne:':'') +this.temp.pointOpacity+':'+this.maxLevel+':'+this.nodeMaxLevel
            let value = this.temp.opacity[str]  //储存。防止每次渲染（反复切换density）都要算。
            if(value){
                opacity = value
            }else{
                if(Potree.settings.sizeFitToLevel){//按照点云质量来调整的版本：
                    let base = this.material.spacing / Math.pow(1.7, this.maxLevel) //随着level提高，点云重叠几率增多
                    let minBase = this.material.spacing / Math.pow(1.7, this.nodeMaxLevel)
                    let ratio = Math.min(1 / base, 1 / minBase / 3) //ratio为一个能使opacity不大于1 的 乘量，minBase要除以一个数，该数调越大减弱效果越强。level越低opacity和面板越接，level越高效果越弱，以减免过度重叠后的亮度。
                    opacity = base * ratio * num
                    if(!canMoreThanOne){
                        opacity = THREE.Math.clamp(opacity, 0, 0.999) //到1就不透明了（可能出现一段一样）
                    }
                }else{
                    let base = this.material.spacing / Math.pow(2, this.maxLevel) 
                    let minBase = this.material.spacing / Math.pow(2, this.nodeMaxLevel)
                    //console.log(1 / base, 1 / minBase / 6)
                    let ratio = Math.min(1 / base, 1 / minBase / 3) //ratio为一个能使opacity不大于1 的 乘量，minBase要除以一个数，该数调越大减弱效果越强。level越低opacity和面板越接，level越高效果越弱，以减免过度重叠后的亮度。
                    opacity = base * ratio * num
                    if(!canMoreThanOne){
                        opacity = THREE.Math.clamp(opacity, 0, 0.999) //到1就不透明了（可能出现一段一样）
                    }
                }
                this.temp.opacity[str] = opacity
            }
                
            //缺点：防止颜色过亮主要是相机离远时，当在漫游点处由于离点云太近，可能会导致高质量点云看起来很暗。
        }
        //console.log('changePointOpacity ' + this.dataset_id + ', num : ' + num + ' , opacity : ' + this.material.opacity) //检查是否做到了低质量时num==opacity，中质量opacity稍小于num，高质量更小
        
        
        if(Potree.settings.sortCloudMat){
            this.opacity = opacity; this.material.opacity = opacity
        }else{
            this.material.opacity = opacity
        }
        
        dontRender || viewer.dispatchEvent('content_changed') 
    } 
     

 

    updateBound(){
        var boundingBox_ = this.pcoGeometry.tightBoundingBox.clone().applyMatrix4(this.matrixWorld)//tightBoundingBox是点云原始的bound，但经过（绕z）旋转后bound有所改变，比之前体积更大。
        this.bound = boundingBox_
        this.bound2 = this.getBoundWithPanos()
    } 
    getBoundWithPanos(){//确保panoBound在内的bound 
        let bound = this.bound.clone()
        this.panos.forEach(pano=>{
            let panoBound = new THREE.Box3
            panoBound.expandByPoint(pano.position)
            panoBound.expandByVector(new THREE.Vector3(1,1,1));//give pano a margin
            bound.union(panoBound)
        }) 
        return bound
    }
    
    getPanosBound(){//仅由所有pano构成的bound
        if(this.panos.length > 0){
            let minSize = new THREE.Vector3(1,1,1)
            this.panosBound = math.getBoundByPoints(this.panos.map(e=>e.position), minSize)
        }else{
            this.panosBound = null
        } 
    } 
    
    getUnrotBoundPoint(type){//获取没有旋转的tightBounding的水平四个点
        //如果alighment支持任意轴旋转,水平面上看到的可能就是六边形了，失去意义，到时候不能用这个。也可以若只绕z旋转， 使用tightBoundingBox，否则bound
        let bound = this.pcoGeometry.tightBoundingBox 

        if(type == 'all'){
            return [new THREE.Vector3(bound.min.x, bound.min.y, bound.min.z),
                new THREE.Vector3(bound.max.x, bound.min.y, bound.min.z),
                new THREE.Vector3(bound.max.x, bound.max.y,bound.min.z),
                new THREE.Vector3(bound.min.x, bound.max.y,bound.min.z),
                new THREE.Vector3(bound.min.x, bound.min.y, bound.max.z),
                new THREE.Vector3(bound.max.x, bound.min.y, bound.max.z),
                new THREE.Vector3(bound.max.x, bound.max.y,bound.max.z),
                new THREE.Vector3(bound.min.x, bound.max.y,bound.max.z),
            ].map(e=>e.applyMatrix4(this.matrixWorld)) 

        }else 
            return [new THREE.Vector3(bound.min.x, bound.min.y,0),
                new THREE.Vector3(bound.max.x, bound.min.y,0),
                new THREE.Vector3(bound.max.x, bound.max.y,0),
                new THREE.Vector3(bound.min.x, bound.max.y,0),
            ].map(e=>e.applyMatrix4(this.matrixWorld)) 
    } 
     
    getVolume(){
        /* var points = this.getUnrotBoundPoint()       -----在只绕z轴旋转时这么写也行
        var area = Math.abs(math.getArea(points))
        return area * (this.bound.max.z - this.bound.min.z) */
        let bound = this.pcoGeometry.tightBoundingBox.clone()
        let size = bound.getSize(new THREE.Vector3)
        return size.x * size.y * size.z
    }
    
    ifContainsPoint(pos){//pos是否坐落于tightBound内
        /* if(!this.bound || !this.bound.containsPoint(pos))return   ---这样写也行
        var points = this.getUnrotBoundPoint()
        return math.isPointInArea(points, null, pos)   */
        //要把tightBoundingBox想象成一个volumeBox
        let box = this.pcoGeometry.tightBoundingBox  
        let center = box.getCenter(new THREE.Vector3)
        let size = box.getSize(new THREE.Vector3)
        let boxMatrix = new THREE.Matrix4().setPosition(center.x,center.y,center.z);
        boxMatrix.scale(size);
        boxMatrix.premultiply(this.matrixWorld)
      
        return Potree.Utils.isIntersectBox(pos, boxMatrix) 
    } 
 
    
    intersectBox(boxWorldMatrix){
        
        let boxM = boxWorldMatrix.clone().premultiply(this.matrixWorld.clone().invert()); //box乘上点云逆矩阵  （因为点云的忽略掉其matrixWorld， 为了保持相对位置不变，box要左乘matrixWorld的逆）(因第一个参数bound不好变形，第二个参数box可以)
          
        return Potree.Utils.isIntersectBox(this.pcoGeometry.tightBoundingBox, boxM)     
    }
    
    
    
    
    
}