THREE.JSraycaster未按预期工作

问题描述n我正在开发一个边栏工具包，可以在选择对象和非选择对象之间切换模式。n总而言之，nP1 raycaster无法按预期工作nP2vector.unproject对象位置更新时可能不准确np3，其顶点将值保留在最后一帧中nThree.js版本nDevnr89n浏览器n[]所有浏览器n浏览器nFirefoxnInternet Explorern操作系统n所有浏览器nWindowsnmacOSnLinuxn安卓niOSn硬件要求（图形卡、虚拟现实设备等）n详细信息n我从我建立了一个拓扑参数计算服务器。我想让用户选择他们想要测试全局导航功能的线段。n（1）P1，raycaster不工作n最初，我想使用raycaster将鼠标投影到平面位置上n// collect>nThe raycaster is built using the following codesnlet raycaster if (this._camera instanceof THREE.PerspectiveCamera) = -origin.y / dir.y>nThis would not work because it returns empty array everytime when I try to \"pick\". The scene (I have \"quadTree\" & \"Division\" and inverse-query table for indexing but I muted them to test the functionalities for the moment) contains base floor built from plane geometry, and some other floor segments where roads placed on.nI am frustrated because the codes seem to be correct.n(2) P2, Ok I built my own raycaster and everyting works good until I found some unpleasant problems:n(2-1) After unprojected mouse vector , I solved equation P0 + = 0, then I triggered quadtree to collect objects nearby. If they are selected, I will flip the hex color value.nBut, I found that the solution point does not perfectly coinside with mouse position on my screen. There is always a shift between the mouse on screen and point drawed on 3d world. Because the equation is simple, I suspect that the error has some relationship with \"unproject\" method.n(2-2) Since quadtree just uses my AABB to collect candidates, they are not true targets I wanted. I need to perform more rigorous tests. However I found after setting the position of the intersected point or sphere, the vertices are not updated accordingly.nthis.trackball.position.set(clickpos.x, 0,>nThis will prevent me to produce a good functionality for developers and customers.nTHREE.Raycaster()与THREE.LineSegments()配合良好。链接57该答案中的代码段是用Three.jsr89.n恐怕。计算不准确让我向您展示一些代码：n首先n（1）我已通过从鼠标位置扣除偏移量对齐相机：n第二n（1）以下计算的相交点不能与鼠标位置完全重叠：n（2）此处的代码与raycaster.setFromCamera（这只老鼠，这个。_摄像头）n你能提供一个实时代码示例吗？n THREE.JS raycaster does not work as expectedn

THREE.JSraycaster未按预期工作

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