TinTin++ Mud Client Manual
         COORDINATES


         When the 0,0 coordinate is in the upper left corner TinTin++ uses
         a y,x / rows,cols notation. When the 0,0 coordinate is in the
         bottom left corner tintin uses a x,y / cols/rows notation.

         When a square is defined this is done by specifying the upper left
         and bottom right corner of the square using four coordinates.

         The vast majority of tintin commands use row,col notation.

Related: characters, colors, escape, mathematics and pcre.