Game.LambdaHack.VectorXY

Basic cartesian geometry operations on 2D vectors.

Documentation

newtype VectorXY

2D vectors in cartesian representation.

Constructors

VectorXY (X, Y)

Instances

Eq VectorXY

Show VectorXY

shiftXY :: PointXY -> VectorXY -> PointXY

Shift a point by a vector.

movesXY :: [VectorXY]

Vectors of all unit moves in the chessboard metric, clockwise, starting north-west.

movesCardinalXY :: [VectorXY]

Vectors of all cardinal direction unit moves, clockwise, starting north.

chessDistXY :: VectorXY -> Int

The lenght of a vector in the chessboard metric, where diagonal moves cost 1.

euclidDistSqXY :: VectorXY -> Int

Squared euclidean length of a vector.

negXY :: VectorXY -> VectorXY

Reverse an arbirary vector.