BishBosh.Direction.Direction

AUTHOR

Dr. Alistair Ward

DESCRIPTION

• Describes a direction.
• The resolution of the measure is merely sufficient for Chess-moves.
• The IO-format is based on 8 points of the compass.

Types

Type-synonyms

type ArrayByDirection = Array Direction

A boxed array indexed by direction, of arbitrary elements.

Data-types

data Direction

Define the direction in which a piece moves relative to the board's edges.

Instances

Bounded Direction

Defined in BishBosh.Direction.Direction

Methods

minBound :: Direction

maxBound :: Direction

Eq Direction

Defined in BishBosh.Direction.Direction

Methods

(==) :: Direction -> Direction -> Bool

(/=) :: Direction -> Direction -> Bool

Ord Direction

Defined in BishBosh.Direction.Direction

Methods

compare :: Direction -> Direction -> Ordering

(<) :: Direction -> Direction -> Bool

(<=) :: Direction -> Direction -> Bool

(>) :: Direction -> Direction -> Bool

(>=) :: Direction -> Direction -> Bool

max :: Direction -> Direction -> Direction

min :: Direction -> Direction -> Direction

Read Direction

Defined in BishBosh.Direction.Direction

Methods

readsPrec :: Int -> ReadS Direction

readList :: ReadS [Direction]

readPrec :: ReadPrec Direction

readListPrec :: ReadPrec [Direction]

Show Direction

Defined in BishBosh.Direction.Direction

Methods

showsPrec :: Int -> Direction -> ShowS

show :: Direction -> String

showList :: [Direction] -> ShowS

Ix Direction

Defined in BishBosh.Direction.Direction

Methods

range :: (Direction, Direction) -> [Direction]

index :: (Direction, Direction) -> Direction -> Int

unsafeIndex :: (Direction, Direction) -> Direction -> Int

inRange :: (Direction, Direction) -> Direction -> Bool

rangeSize :: (Direction, Direction) -> Int

unsafeRangeSize :: (Direction, Direction) -> Int

NFData Direction

Defined in BishBosh.Direction.Direction

Methods

rnf :: Direction -> ()

FixedMembership Direction

Defined in BishBosh.Direction.Direction

Methods

members :: [Direction]

Opposable Direction

Defined in BishBosh.Direction.Direction

Methods

getOpposite :: Direction -> Direction

Orientated Direction

Defined in BishBosh.Direction.Direction

Methods

isVertical :: Direction -> Bool

isHorizontal :: Direction -> Bool

isParallel :: Direction -> Bool

isDiagonal :: Direction -> Bool

isStraight :: Direction -> Bool

ReflectableOnY Direction

Defined in BishBosh.Direction.Direction

Methods

reflectOnY :: Direction -> Direction

ReflectableOnX Direction

Defined in BishBosh.Direction.Direction

Methods

reflectOnX :: Direction -> Direction

Rotatable Direction

Defined in BishBosh.Direction.Direction

Methods

rotate90 :: Direction -> Direction

rotate180 :: Direction -> Direction

rotate270 :: Direction -> Direction

Constants

parallels :: [Direction]

Constant directions.

s :: Direction

n :: Direction

w :: Direction

e :: Direction

diagonals :: [Direction]

Constant directions.

sw :: Direction

se :: Direction

nw :: Direction

ne :: Direction

opposites :: [(Direction, Direction)]

• Returns a list of directions, each paired with its anti-parallel.
• CAVEAT: each direction only appears once in the list, on an arbitrary side of a pair.

Functions

attackDirectionsForPawn :: LogicalColour -> [Direction]

The directions in which a Pawn can attack.

listArrayByDirection :: IArray a e => [e] -> a Direction e

Array-constructor.

Predicates

areAligned :: Direction -> Direction -> Bool

Whether the two directions specified, are either parallel or anti-parallel.