网页CAD开发（web cad sdk）中用到的数学库

ywl0224

前言

在网页版CAD二次开发中, 正确的使用数学库是十分重要的，我们通过[快速入门了解了如果打开图纸后，希望对图形进行各种处理，就需要各种数学计算， mxcad提供了一些类来参与计算或者表示一些数据结构，各类API查询如下图：

向量 McGeVector3d

如果不理解向量的概念，请学习理解后再继续阅读，在three.js中有向量`THREE.Vector3` 而对应的在mxcad也存在[McGeVector3d]表示3D空间中的矢量(向量)

在该类中存在四个轴`kXAxis`、`kYAxis`、`kZAxis`、`kNegateZAxis` 分别都是固定的向量，`THREE.Vector3` 与 `McGeVector3d` 是完全等价的，只是在mxcad中与其他数据参与运算的是`McGeVector3d`，代码如下：

1. <p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);">import</span><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);"> { </span><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);">McGeVector3d</span><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);"> } </span><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);">from</span><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);"> </span><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);">"mxcad"</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">const</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">vet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> = </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">new</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">McGeVector3d</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">1</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">, </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">0</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">, </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">0</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">)</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 得到THREE.Vector3</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">const</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">tVet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> = </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">vet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">toVector3</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">()</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">const</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">newVet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> = </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">new</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">McGeVector3d</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">tVet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">)</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 旋转</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">tVet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">rotateBy</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">Math</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">PI</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">. </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">McGeVector3d</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">kXAxis</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">)</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 取反</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">vet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">negate</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">()</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 垂直90度</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">vet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">perpVector</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">()</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 计算两个向量之间的角度</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">vet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">angleTo1</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">newVet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">)</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">vet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">angleTo1</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">newVet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">,  </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">McGeVector3d</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">kZAxis</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">)</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 归一化</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">vet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">normalize</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">()</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 点积</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">vet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">dotProduct</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">newVet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">)</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 交叉积</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">vet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">crossProduct</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">newVet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">)</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 是否相等</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">vet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">isEqualTo</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">newVet</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">)</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 向量与某个值相乘</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></span></p><p class="MsoNormal" style="line-height: 18pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-color: black;"><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);">vet</span><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);">.</span><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);">mult</span><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);">(</span><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);">10</span><span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);">)</span></span><span style="background-color: rgb(31, 31, 31); font-family: Consolas; font-size: 13.5pt; color: rgb(255, 255, 255);"><o:p></o:p></span></p>

复制代码

3D点 McGePoint3d

这是最常使用的一个类[McGePoint3d]，代表3D空间中的一个点的构造类，由`x`、`y`、`z` 三个双精度数值组成的结构，代码如下：

1. <p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">import</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> { </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">McGePoint3d</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> } </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">from</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">"mxcad"</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">const</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">pt1</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> = </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">new</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">McGePoint3d</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">0</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">, </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">0</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">, </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">0</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">)</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 或者</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">const</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">pt2</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> new McGePoint3d({ x: </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">0</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">, </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">y</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">: </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">0</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">, </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">z</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">: </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">0</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">})</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Calibri;mso-fareast-font-family:宋体;
   
2. mso-bidi-font-family:'Times New Roman';font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 提供了一些实用的方法</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 判断两个点是否相等</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">pt1</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">isEqualTo</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">pt2</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">)</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 计算两点距离</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">pt1</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">distanceTo</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">pt2</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">)</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 将three.js 的向量设置成点</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">pt1</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">setFromVector3</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">(</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">new</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);"> </span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">THREE</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">Vector3</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">())</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">// 得到点对应的three.js 向量</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal" style="line-height: 18pt; background: rgb(31, 31, 31);"><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">pt1</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">.</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">toVector3</span><span style="font-family: Consolas; font-size: 13.5pt; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial; color: rgb(255, 255, 255);">()</span><span style="font-family: Consolas; color: rgb(204, 204, 204); font-size: 13.5pt;"><o:p></o:p></span></p><p class="MsoNormal">
   
3. </p>

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kmliro_2017

谢谢分享！！！！！

kmliro_2017

谢谢分享！！！！！

kmliro_2017

谢谢分享！！！！！

kmliro_2017

谢谢分享！！！！！

kmliro_2017

谢谢分享！！！！！

kmliro_2017

谢谢分享！！！！！！

kmliro_2017

谢谢分享！！！！！！