计算圆的坐标 [英] Calculate the coordinates in a circle

问题描述

我在按钮中间画了一个假想的圆圈.

I am drawing an imaginary circle around the middle of a button.

如果Height>Width，则圆的半径为Height/2；如果Width>Height，则圆的半径为Width/2. 现在，我必须计算该圆中的哪些坐标(以像素为单位). 这个想法是如果鼠标光标悬停在该圆圈上，就会发生某些情况.

The radius of the circle is the Height/2 if Height>Width or Width/2 if Width>Height. Now i have to calculate which coordinates (in pixels) are in this circle. The idea is that if e.g. the mouse cursor hovers over that circle, something happens.

推荐答案

当满足以下方程式时，您位于圆圈内:

You are inside the circle when this equation is satisfied:

Math.pow(mouse_pos_x-center_circle_x,2)+Math.pow(mouse_pos_y-center_circle_y,2)<Math.pow(radius,2)

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