MaskModifier

Quick facts
Class	MaskModifier
CellType	Unchanged
CellDir	Unchanged
CellRotation	Unchanged
Bound	Unchanged
Properties	Unchanged or set to Finite
Requirements	None

This modifier restricts the set of cells in a grid. This operates much like bounds do, but it supports an arbitrary set of cells, a bit less efficiently. That means that TryMove, FindCell etc will fail instead of returning cells that have not been included.

There are two modes of operations. Either you supply a finite set of cells, or you supply a function which returns true for cells that need to be included.

For example, here the modifier filters a grid to just cells lying on the x or y axes.

centerSquare.Masked(cell => cell.x == 0 || cell.y == 0)

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This modifier can also be applied by extension methods Masked or Masked.

Cell co-ordinates

This modifier does not alter cell co-ordinates.