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      1. 如何围绕另一个点旋转一个点

        how to rotate a point around another point(如何围绕另一个点旋转一个点)
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                  本文介绍了如何围绕另一个点旋转一个点的处理方法,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跟版网的小编来一起学习吧!

                  问题描述

                  我正在写一个游戏.我需要知道如何将点 a 围绕点 b 旋转给定的度数.我正在用 java 写这个,它将成为我的课程的一部分,Point.

                  I am writing a game. I need to know how to rotate point a around point b by a given number of degrees. I am writing this in java and it is going to be part of my class, Point.

                  推荐答案

                  double x1 = point.x - center.x;
                  double y1 = point.y - center.y;
                  
                  double x2 = x1 * Math.cos(angle) - y1 * Math.sin(angle));
                  double y2 = x1 * Math.sin(angle) + y1 * Math.cos(angle));
                  
                  point.x = x2 + center.x;
                  point.y = y2 + center.y;
                  

                  这种方法使用旋转矩阵.point"是你的a点,center"是你的b点.

                  This approach uses rotation matrices. "point" is your point a, "center" is your point b.

                  这篇关于如何围绕另一个点旋转一个点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跟版网!

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