语法：
mp_grid_add_rectangle(id, x1, y1, x2, y2);
| 参数 | 描述 |
|---|---|
| id | Index of the mp_grid that is to be used |
| x1 | The x coordinate of the left side of the rectangle to check. |
| y1 | The y coordinate of the top side of the rectangle to check. |
| x2 | The x coordinate of the right side of the rectangle to check. |
| y2 | The x coordinate of the bottom side of the rectangle to check. |
返回： N/A（无返回值）
描述
This function asks you to define a rectangle within the room, and then it marks all mp_grid cells "touch" that rectangle as being forbidden, meaning that the path-finding functions cannot cross them. 下图描绘了这是如何工作的：
As you can see, the rectangle defined by (50, 90) to (200, 180)
marks all the equivalent mp_grid cells that it touches as being
forbidden.
例如：
mp_grid_add_rectangle(grid, 0, 0, 100,
200);
The above code will mark as forbidden all cells of the mp_grid indexed in the variable "grid" that fall within the area 0,0 to 100,200.