< index < 12. Field of view toolkit < 12.2 Computing the field of view | ===================================== 12.3 Reading fov information ===================================== | > 12.4 Destroying a map

Once your computed the field of view, you can know if a cell is visible with :

    C++ : bool TCODMap::isInFov(int x, int y) const
    C   : bool TCOD_map_is_in_fov(TCOD_map_t map, int x, int y)
    Py  : map_is_in_fov(map, x, y)

Parameter | Description
--- | ---
map | In the C version, the map handler returned by the TCOD_map_new function.
x,y | Coordinates of the cell we want to check. 0 <= x < map width. 0 <= y < map height.

Example :

    C++ : TCODMap *map = new TCODMap(50,50); // allocate the map
          map->setProperties(10,10,true,true); // set a cell as 'empty'
          map->computeFov(10,10); // calculate fov from the cell 10x10
    	  bool visible=map->isInFov(10,10); // is the cell 10x10 visible ?
    C   : TCOD_map_t map = TCOD_map_new(50,50);
          TCOD_map_set_properties(map,10,10,true,true);
          TCOD_map_compute_fov(map,10,10);
          bool visible = TCOD_map_is_in_fov(map,10,10);
    Py  : map = libtcod.map_new(50,50)
          libtcod.map_set_properties(map,10,10,True,True)
          libtcod.map_compute_fov(map,10,10)
          visible = libtcod.map_is_in_fov(map,10,10)

You can also retrieve transparent/walkable informations with :

    C++ : bool TCODMap::isTransparent(int x, int y) const
          bool TCODMap::isWalkable(int x, int y) const
    C   : bool TCOD_map_is_transparent(TCOD_map_t map, int x, int y)
          bool TCOD_map_is_walkable(TCOD_map_t map, int x, int y)
    Py  : map_is_transparent(map, x, y)
          map_is_walkable(map, x, y)

Parameter | Description
--- | ---
map | In the C version, the map handler returned by the TCOD_map_new function.
x,y | Coordinates of the cell we want to check. 0 <= x < map width. 0 <= y < map height.