ALGO RESEARCH CENTRE

Fractal Leaf Algorithm

右图是树叶,或者看上去像树叶,事实上它仅仅是被模拟的赝品. 核心算法如下:

int leaf()
{
   int i;
   float x=0, y=0, r, u=0;

   srand(time(0));
   for(i=0; i<=500000; i++)
   {
      r = rand() % 100;

      if (r < 1)
      {
         x = 0;
         y = .16 * y;
      }
      if (r>=1 && r<86)
      {
         u = .85 * x + .04 * y;
         y = -.04 * x + .85 * y + 1.6;
         x = u;
      }
      if (r>=86 && r<97)
      {
         u = .2 * x - .26 * y;
         y = .23 * x + .22 * y + 1.6;
         x = u;
      }
      if (r>=97)
      {
         u = -.15 * x + .28 * y;
         y = .26 * x + .24 * y + .44;
         x = u;
      }
         putpixel(45 * x + 230, 480- 45 * y);
   }
   return 0;
}