Rewrote portions of our maze generation code to use RoomData. This
provides an object that unifies all room data instead of having it
spread across various data structures and linked loosely by hash maps.
We'll need this to implement the remaining generation features.
Completed the second step of maze generation. In this step, a graph is
built that describes which rooms can be connected to each other by
doorways. A maze is created by removing nodes (rooms) from the graph.
The algorithm is incomplete, but it already produces interesting mazes
comparable to DD's hand-made mazes.
A few details for the future:
1. Doorways are currently carved into walls at default locations. This
is just for testing and placement should be improved later. Some
doorways should be removed and redundant doorways should be possible.
2. The size of a section should be assessed and the section should be
discarded if it has too few rooms.
3. An NPE occurs every so often when a maze is generated. It's possible
that it happens because of removing a node from the graph that is
coincidentally the current node for LinkedList's iterator. The solution
would be to add nodes to a list and defer removals until after the
iteration is done.
Made some progress on the second step of our maze generation algorithm:
building an adjacency graph for setting up doorways later. Renamed the
SpatialNode class to PartitionNode to better represent its role.
