如何找到圆柱上是否有点？ [英] how to find if point is on the cylinder or not?

问题描述

任何关于找到点的想法，例如（4,5）都存在于具有中心起点和终点的半径中，

Hi,

Any idea about to find the point e.g.(4,5)is present in the cylinder with center start point and end point with radius,

推荐答案

似乎你不知道什么是圆柱体 - 在几何中。这是一个3D对象，所以你的2D方法一直都是错误的。

这里你可以遵循的步骤：

1.了解cylinder [ ^ ]

2.谷歌提出您的问题（样本查找 - http://www.flipcode.com/archives/Fast_Point-In-Cylinder_Test.shtml [ ^ ]）

It seems you have no idea what cylinder is - in geometry. It's a 3D object so your approach of 2D seems wrong all the way.
Here the steps you may follow:
1. Learn about cylinder[^]
2. Google for your question (sample finding - http://www.flipcode.com/archives/Fast_Point-In-Cylinder_Test.shtml[^])

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