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-module(btl_turn_actions_move).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-export
(
[
handle/2
]
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec cross
(
shr_map:type(),
list(shr_location:type()),
list(shr_direction:enum()),
non_neg_integer(),
shr_location:type()
)
-> {shr_location:type(), non_neg_integer()}.
cross (_Map, _ForbiddenLocations, [], Cost, Location) ->
{Location, Cost};
cross (Map, ForbiddenLocations, [Step|NextSteps], Cost, Location) ->
NextLocation = shr_location:apply_direction(Step, Location),
NextTileInstance = shr_map:get_tile_instance(NextLocation, Map),
NextTileClassID = shr_tile_instance:get_tile_id(NextTileInstance),
NextTile = shr_tile:from_id(NextTileClassID),
NextCost = (Cost + shr_tile:get_cost(NextTile)),
IsForbidden =
lists:foldl
(
fun (ForbiddenLocation, Prev) ->
(Prev or (NextLocation == ForbiddenLocation))
end,
false,
ForbiddenLocations
),
IsForbidden = false,
cross(Map, ForbiddenLocations, NextSteps, NextCost, NextLocation).
-spec cross
(
shr_map:type(),
list(shr_location:type()),
list(shr_direction:enum()),
shr_location:type()
)
-> {shr_location:type(), non_neg_integer()}.
cross (Map, ForbiddenLocations, Path, Location) ->
cross(Map, ForbiddenLocations, Path, 0, Location).
-spec get_path_cost_and_destination
(
btl_character_turn_update:type(),
list(shr_direction:type())
)
->
{
non_neg_integer(),
shr_location:type(),
btl_character_turn_update:type()
}.
get_path_cost_and_destination (Update, Path) ->
{S0Update, Character} = btl_character_turn_update:get_character(Update),
{S1Update, Battle} = btl_character_turn_update:get_battle(S0Update),
CharacterIX = btl_character_turn_update:get_character_ix(S1Update),
Map = btl_battle:get_map(Battle),
ForbiddenLocations =
orddict:fold
(
fun (IX, Char, Prev) ->
IsAlive = btl_character:get_is_alive(Char),
if
(IX == CharacterIX) -> Prev;
(not IsAlive) -> Prev;
true ->
ordsets:add_element(btl_character:get_location(Char), Prev)
end
end,
ordsets:new(),
btl_battle:get_characters(Battle)
),
{NewLocation, Cost} =
cross
(
Map,
ForbiddenLocations,
Path,
btl_character:get_location(Character)
),
{Cost, NewLocation, S1Update}.
-spec assert_character_can_move
(
btl_character:type(),
non_neg_integer()
)
-> 'ok'.
assert_character_can_move (Char, Cost) ->
CharacterMovementPoints =
shr_statistics:get_movement_points
(
shr_character:get_statistics
(
btl_character:get_base_character(Char)
)
),
true = (Cost =< CharacterMovementPoints),
ok.
-spec commit_move
(
btl_character:type(),
btl_character_turn_update:type(),
list(shr_direction:type()),
shr_location:type()
)
-> btl_character_turn_update:type().
commit_move (Character, Update, Path, NewLocation) ->
{S0Update, Battle} = btl_character_turn_update:get_battle(Update),
Map = btl_battle:get_map(Battle),
TileOmnimods =
shr_tile:get_omnimods
(
shr_tile:from_id
(
shr_tile_instance:get_tile_id
(
shr_map:get_tile_instance(NewLocation, Map)
)
)
),
{UpdatedCharacter, CharacterAtaxiaUpdate} =
btl_character:ataxia_set_location(NewLocation, TileOmnimods, Character),
S1Update =
btl_character_turn_update:ataxia_set_character
(
UpdatedCharacter,
CharacterAtaxiaUpdate,
S0Update
),
TimelineItem =
btl_turn_result:new_character_moved
(
btl_character_turn_update:get_character_ix(S1Update),
Path,
NewLocation
),
S2Update = btl_character_turn_update:add_to_timeline(TimelineItem, S1Update),
S2Update.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXPORTED FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec handle
(
btl_action:type(),
btl_character_turn_update:type()
)
-> btl_character_turn_update:type().
handle (BattleAction, Update) ->
{S0Update, Character} = btl_character_turn_update:get_character(Update),
Path = btl_action:get_path(BattleAction),
{PathCost, NewLocation, S1Update} =
get_path_cost_and_destination(S0Update, Path),
assert_character_can_move(Character, PathCost),
commit_move(Character, S1Update, Path, NewLocation).
|
