递归三角形

void Draw( CClientDC *dc,const CPoint& top,const CPoint& left,CPoint &right,int drawLevel )
{
    if (drawLevel <= 0)
    {
        return;
    }

    dc->MoveTo(top);
    dc->LineTo(left);
    dc->LineTo(right);
    dc->LineTo(top);

    CPoint topLeft((top.x+left.x)/2,(top.y+left.y)/2);
    CPoint topRight((top.x+right.x)/2,(top.y+right.y)/2);
    CPoint leftRight((left.x+right.x)/2,(left.y+right.y)/2);

    Draw(dc,top,topLeft,topRight,drawLevel-1);
    Draw(dc,left,leftRight,topLeft,drawLevel-1);
    Draw(dc,right,topRight,leftRight,drawLevel-1);
}

结果：

 

其中level = 5;