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module BattleMap.Struct.Location exposing (..)
-- Elm -------------------------------------------------------------------------
import Json.Decode
import Json.Decode.Pipeline
import Json.Encode
-- Battle Map ------------------------------------------------------------------
import BattleMap.Struct.Direction
--------------------------------------------------------------------------------
-- TYPES -----------------------------------------------------------------------
--------------------------------------------------------------------------------
type alias Type =
{
x : Int,
y : Int
}
type alias Ref = (Int, Int)
--------------------------------------------------------------------------------
-- LOCAL -----------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-- EXPORTED --------------------------------------------------------------------
--------------------------------------------------------------------------------
neighbor : BattleMap.Struct.Direction.Type -> Type -> Type
neighbor dir loc =
case dir of
BattleMap.Struct.Direction.Right -> {loc | x = (loc.x + 1)}
BattleMap.Struct.Direction.Left -> {loc | x = (loc.x - 1)}
BattleMap.Struct.Direction.Up -> {loc | y = (loc.y - 1)}
BattleMap.Struct.Direction.Down -> {loc | y = (loc.y + 1)}
BattleMap.Struct.Direction.None -> loc
get_ref : Type -> Ref
get_ref l =
(l.x, l.y)
from_ref : Ref -> Type
from_ref (x, y) =
{x = x, y = y}
dist : Type -> Type -> Int
dist loc_a loc_b =
(
(abs (loc_a.x - loc_b.x))
+
(abs (loc_a.y - loc_b.y))
)
decoder : (Json.Decode.Decoder Type)
decoder =
(Json.Decode.succeed
Type
|> (Json.Decode.Pipeline.required "x" Json.Decode.int)
|> (Json.Decode.Pipeline.required "y" Json.Decode.int)
)
encode : Type -> Json.Encode.Value
encode loc =
(Json.Encode.object
[
( "x", (Json.Encode.int loc.x) ),
( "y", (Json.Encode.int loc.y) )
]
)
|
