Type Members

1.  sealed abstract class CompassDir extends Product with Serializable

   The class CompassDir represents the cardinal compass directions in a grid-like coordinate system.

   The class CompassDir represents the cardinal compass directions in a grid-like coordinate system. There are exactly four instances of this class: North, East, South and West, which are also defined in this package.

   All the CompassDir objects are immutable.

   This class and its instances have aliases in the top-level package o1, so they are accessible to students simply via import o1._.

   See also

   GridPos

2.  abstract class Grid[Element] extends AnyRef

   The class Grid represents rectangular grids that contain elements of a particular kind.

   The class Grid represents rectangular grids that contain elements of a particular kind. Each element in a grid is located at a unique pair of coordinates, represented as a GridPos.

   X coordinates run from 0 to width-1, y coordinates from 0 to height-1. (0,0) corresponds to the upper left corner of the grid.

   There are different kinds of grids: the type of element that a grid contains is defined by a type parameter. For instance Grid[Square] is a grid where each pair of x and y coordinates contains a Square object, and Grid[House] is a grid containing House objects.

   A Grid is mutable: it is possible to replace an element at a particular GridPos with another. (Depending on the element type, the elements may be individually mutable, too.) The width and height of a grid never change, however.

   Upon creation, a Grid initializes itself by calling initialElements, which produces an initial state for the grid.

   This class has an alias in the top-level package o1, so it’s accessible to students simply via import o1._.

3.  case class GridPos(x: Int, y: Int) extends Product with Serializable

   An object of type GridPos represents a pair of integer coordinates on two axes named x and y.

   An object of type GridPos represents a pair of integer coordinates on two axes named x and y. Such a pair can be used to reference a point on a Grid.

   In this coordinate system, x increases "eastwards" and y increases "southwards".

   GridPos objecta are immutable.

   This class has an alias in the top-level package o1, so it’s accessible to students simply via import o1._.

   x

   an x coordinate

   y

   a y coordinate