如何计算座标 | 如何计算

本文介绍了如何计算座标的处理方法，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

你好！

Hello!

#include <graphics.h>
#include <conio.h>

main()
{
   int gd=DETECT,gm,points[]={320,150,420,300,250,300,320,150};

   initgraph(&gd, &gm, "C:\\TC\\BGI");

   drawpoly(4, points);

   getch();
   closegraph();
   return 0;
}

他是如何计算这些点的?

谢谢.

How did he calculate those points ?

Thanks.

推荐答案

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...................X......................  
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.....Z...........................Y........  
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...................W......................  
1. Fix point W
                         [X.x = W.x], [X.y = W.y + sqrt(2)*sideLength]
[Y.x = W.x + sqrt(2)*sideLength*0.5], [Y.y = (W.y + X.y) * 0.5]
    [Z.x = Y.x - sqrt(2)*sideLength], [Z.y = Y.y]

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