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+author = "Wxn"
+title = "三维方向的思考"
+date = "2023-11-05"
+description = "Please read me first."
+tags = [
+	"三维方向的思考",
+]
+categories = [
+    "个人随笔",
+]
+
++++
+
+This article offers a sample of basic Markdown.
+<!--more-->
+
+# 正文开始
+
+## OpenGL
+
+着色器与纹理贴图
+
+## 一道题
+
+如何判断一个点(x,y)在一个多边形的内部,外部,还是边上?
+
+我们先来看看国外教授的看法:https://alienryderflex.com/polygon/
+
+![1699178621524](图片/1699178621524.png)
+
+这种情况有点特殊,而且如果遇到了也不知道如何解决.所以我找找看有没有更简单的办法
+
+----
+
+下面这个同学讲的很好,使用叉乘!
+
+博客:【如何判断点在多边形内部 - CSDN App】http://t.csdnimg.cn/JMdc7
+
+视频:[教学视频](https://www.bilibili.com/video/BV1FD4y1i7Dy/?share_source=copy_web&vd_source=9a022d27a757e495adc6e15743c4ec1d)
+
+==下面来讲一下叉乘==
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