本文介绍了用于测试点是否在圆内的方程的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如果你有一个圆心 (center_x, center_y)
和半径 radius
的圆,你如何测试一个给定的点是否具有坐标 (x, y)
在圆圈内?
If you have a circle with center (center_x, center_y)
and radius radius
, how do you test if a given point with coordinates (x, y)
is inside the circle?
推荐答案
一般来说,x
和 y
必须满足 (x - center_x)² + (y - center_y)² <半径²
.
In general, x
and y
must satisfy (x - center_x)² + (y - center_y)² < radius²
.
请注意,满足上述等式且<
被==
代替的点被认为是圆上的点,并且满足上述等式且<
被>
替换的点被认为是外部圆.
Please note that points that satisfy the above equation with <
replaced by ==
are considered the points on the circle, and the points that satisfy the above equation with <
replaced by >
are considered the outside the circle.
这篇关于用于测试点是否在圆内的方程的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!