BishBosh.Cartesian.Ordinate

AUTHOR

Dr. Alistair Ward

DESCRIPTION

• Describes the y-axis by which the board is indexed.
• AKA the rank of a piece.
• N.B. this coordinate-system is for internal use only, and doesn't attempt to replicate any standard chess-notation.

Constants

yLength :: Y

The constant length of the y-axis.

yMin :: Y

yMax :: Y

yBounds :: (Y, Y)

The constant bounds of ordinates.

yRange :: [Y]

The constant list of all ordinates.

Functions

toIx :: Y -> Int

Convert to an array-index.

fromIx :: Int -> Y

Convert from an array-index.

firstRank :: LogicalColour -> Y

The rank from which pieces conventionally start.

lastRank :: LogicalColour -> Y

The final rank; i.e. the one on which a Pawn is promoted.

pawnsFirstRank :: LogicalColour -> Y

The rank from which Pawns conventionally start.

enPassantRank :: LogicalColour -> Y

The rank from which a Pawn may capture en-passant.

reflect :: Y -> Y

Reflects about the mid-point of the axis.

translate :: (Y -> Y) -> Y -> Y

Translate the specified ordinate.

maybeTranslate :: (Y -> Y) -> Y -> Maybe Y

Where legal, translate the specified ordinate.

Predicates

inBounds :: Y -> Bool

Predicate.