基本介紹
- 中文名:謝爾賓斯基地毯
- 提出者:謝爾賓斯基
- 時間:1916年
- 歸類:自相似集
介提出者,構造,程式代碼,
介提出者
構造
謝爾賓斯基地毯的構造與謝爾賓斯基三角形相似,區別僅在於謝爾賓斯基地毯是以正方形而非等邊三角形為基礎的。將一個實心正方形劃分為的9個小正方形,去掉中間的小正方形,再對餘下的小正方形重複這一操作便能得到謝爾賓斯基地毯。如下圖:
程式代碼
謝爾賓斯基地毯可以由以下電腦程式構造:
/**Decides if a point at a specific location is filled or not.@param x is the x coordinate of the point being checked@param y is the y coordinate of the point being checked@param width is the width of the Sierpinski Carpet being checked@param height is the height of the Sierpinski Carpet being checked@return 1 if it is to be filled or 0 if it is not*/ int isSierpinskiCarpetPixelFilled(int x,int y,int width,int height){// base caseif (x<1){return 0;}// general case{/*If the grid was split in 9 parts, what part(x2,y2) would x,y fit into?*/int x2 = x*3/width; // an integer from 0..2 inclusiveint y2 = y*3/height; // an integer from 0..2 inclusiveif (x2==1 && y2==1) // if in the centre squaure, it should be filled.return 1;/* offset x and y so it becomes bounded by 0..width/3 and 0..height/3and prepares for recursive call*/x-=x2*width/3;y-=y2*height/3;}return isSierpinskiCarpetPixelFilled(x,y,width/3,height/3);}