Documentation

2D vectors in cartesian representation.

Shift a point by a vector.

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

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

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

Squared euclidean length of a vector.

Reverse an arbirary vector.

All (8 at most) closest neighbours of a point within an area.

All (4 at most) cardinal direction neighbours of a point within an area.