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|
module Battlemap.Navigator.Move exposing (to)
import Set
import List
import Battlemap
import Battlemap.Direction
import Battlemap.Location
import Battlemap.Tile
import Battlemap.Navigator
import Character
import Util.List
can_move_to_new_tile : (
Battlemap.Navigator.Type ->
Battlemap.Type ->
Battlemap.Location.Type ->
Bool
)
can_move_to_new_tile nav battlemap next_location =
(
(nav.remaining_points > 0)
&& (Battlemap.has_location battlemap next_location)
&& (nav.current_location /= next_location)
&&
(not
(Set.member
(Battlemap.Location.get_ref next_location)
nav.visited_locations
)
)
)
battlemap_move_to : (
Battlemap.Type ->
Battlemap.Location.Type ->
Battlemap.Direction.Type ->
Battlemap.Location.Type ->
Battlemap.Type
)
battlemap_move_to battlemap current_loc dir next_loc =
(Battlemap.apply_to_tile_unsafe
(Battlemap.apply_to_tile_unsafe
battlemap
current_loc
(Battlemap.Tile.set_direction dir)
)
next_loc
(Battlemap.Tile.set_direction dir)
)
navigator_move_to : (
Battlemap.Navigator.Type ->
Battlemap.Direction.Type ->
Battlemap.Location.Type ->
Battlemap.Navigator.Type
)
navigator_move_to nav dir next_loc =
{nav |
current_location = next_loc,
visited_locations =
(Set.insert
(Battlemap.Location.get_ref nav.current_location)
nav.visited_locations
),
previous_directions = (dir :: nav.previous_directions),
remaining_points = (nav.remaining_points - 1)
}
battlemap_backtrack : (
Battlemap.Type ->
Battlemap.Location.Type ->
Battlemap.Type
)
battlemap_backtrack battlemap current_loc =
(Battlemap.apply_to_tile_unsafe
battlemap
current_loc
(Battlemap.Tile.set_direction
Battlemap.Direction.None
)
)
navigator_backtrack : (
Battlemap.Navigator.Type ->
Battlemap.Location.Type ->
(List Battlemap.Direction.Type) ->
Battlemap.Navigator.Type
)
navigator_backtrack nav next_loc prev_dir_tail =
{nav |
current_location = next_loc,
visited_locations =
(Set.remove
(Battlemap.Location.get_ref next_loc)
nav.visited_locations
),
previous_directions = prev_dir_tail,
remaining_points = (nav.remaining_points + 1)
}
to : (
Battlemap.Type ->
Battlemap.Navigator.Type ->
Battlemap.Direction.Type ->
(List Character.Type) ->
(Battlemap.Type, Battlemap.Navigator.Type)
)
to battlemap nav dir char_list =
let
next_location = (Battlemap.Location.neighbor nav.current_location dir)
is_occupied = (List.any (\c -> (c.location == next_location)) char_list)
in
if (not is_occupied)
then
if (can_move_to_new_tile nav battlemap next_location)
then
(
(battlemap_move_to
battlemap
nav.current_location
dir
next_location
),
(navigator_move_to
nav
dir
next_location
)
)
else
case (Util.List.pop nav.previous_directions) of
Nothing -> (battlemap, nav)
(Just (head, tail)) ->
if (head == (Battlemap.Direction.opposite_of dir))
then
(
(battlemap_backtrack
battlemap
nav.current_location
),
(navigator_backtrack
nav
next_location
tail
)
)
else
(battlemap, nav)
else
(battlemap, nav)
|
