MandelbrotSet 分形藝術（C++實現）

轉自 EasyX，不過我重構了代碼。

運行結果：

 

來源程式：

 1 // MandelbrotSet.cpp 2  3 #include "graphics.h" 4 #include <conio.h> 5  6 struct Complex 7 { 8     double re; 9     double im;10 11 public:12     Complex operator * (const Complex &other) const13     {14         Complex c;15         c.re = this->re * other.re - this->im * other.im;16         c.im = this->im * other.re + this->re * other.im;17         return c;18     }19 20     Complex operator + (const Complex &other) const21     {22         Complex c;23         c.re = this->re + other.re;24         c.im = this->im + other.im;25         return c;26     }27 };28 29 void main()30 {31     // 初始化繪圖視窗32     initgraph(640, 480);33 34     /////////////////////////////////////////////////35     // 繪製 Mandelbrot Set (曼德布洛特集)36     /////////////////////////////////////////////////37     Complex z, c;38     for(int x = 0; x < 640; x++)39     {40         c.re = -2.1 + (1.1 - -2.1) * (x / 640.0);41         for(int y = 0; y < 480; y++)42         {43             c.im = -1.2 + (1.2 - -1.2) * (y / 480.0);44             z.re = z.im = 0;45             int k;46             for(k = 0; k < 180; k++)47             {48                 if ( z.re * z.re + z.im * z.im > 4.0 )    break;49                 z = z * z + c;50             }51             putpixel(x, y, (k >= 180) ? 0 : HSLtoRGB((float)((k << 5) % 360), 1.0, 0.5));52         }53     }54 55     // 按任意鍵退出56     _getch();57     closegraph();58 }