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The player camer no longer reveals the entire level.

The end of the level hole is now a staircase. This makes it stand out
from the surroundings more, letting the player know that it is important.

The player character now had a max_health variable along with their health
variable. Upon opening a chest, the player will either have their health
replenished by a random integer betweeen a pre-defined range, or have their
max_health upgraded by a random integer in the same range.

If the player is at max health when opening a chest, they will never have
their health replenished, but instead will always have their max_health
upgraded.

0 to 3 interactible chests will now spawn on each floor. Loot for chests still
needs to be implemented.

The enemy spawning algorithm was not behaving as intended. This commit fixes
that as well as optimizing to logic to decrease related slow-downs.

The map generator will now choose random cells to be enemy spawn locations, up
to a number of spawns less than a defined percentage of the total possible
enemy spawn locations. Enemy spawns are never closer than a pre-defined
distance from the player's spawn and never directly adjecent to a hole.

The tilemap script also will ensure that enemies never spawn inside a
collidable tile. This means that enemies will never spawn trapped inside of
the level geometry.

Implement Safe Player Spawning, Hole Functionality, Level Advancement, Level Score, Obstacle Destruction

The player will now always spawn in a non-obstructed location.

When the player steps onto a hole, they will be teleported to the hole's
destination.

If the hole has no destination, the player will instead by spawned into a
new level/map.

The player node now contains a level counter to track the player's progress.
This score is also displayed on screen. This needs to be tidied up,
graphically.

If the player collides with a destructable obstacle, the obstacle will now
be destroyed. This takes the player's full turn to do, however.

Biomes that are now implemented are the boulder and mushroom biomes. Lake biome
will be implemented if time allows after the player character has a way to
traverse water tiles. Brick biomes, or brick paths will be implemented if time
allows.

There is a tree that spans across each cave room in the map. For each line
that branches off a room, a hole is spawned in that room and linked to a
hole in the room on the opposite end of the line.

There is also one hole placed in a random cave room that is not linked to any
other holes. This hole will serve as the end of the level.

This branch is ready to have the player character branch merged into it as
that branch contains the player teleportation feature needed for additional
development.

The isolated rooms of the map are now detected and a modified Kruskal's
algorithm is used to create a tree spanning all of said rooms.

This algorithm will be modified so that the smallest rooms will not have so
many branches off of them in the tree that they cannot contain all of the holes
that will be created because of those branches.

Cell and Room classes will be created to make the code easier to understand as
well as to support hole placement, biome placement, landmark spawning, and
enemy spawning.

The code for the map generation is now seperate from the tile placement code.
The map generation code is located in the new MapGenerator.gd script.

In the 2D array of ints that represented the map, 0's equated to empty spaces
and 1's equated to walls. Now the value assigned to the enum EMPTY equates to
empty spaces and the value assigned to the enum WALL in the map generator script
equates to walls. This serves to future proof the code as enums for the rest of
the possible tiles, such as WATER, BRICK, and ROCK_T (rock terrain), are also
present.

Three more invalid wall patterns were discovered. They have now been added to the
list of invalid wall patterns to check for.

Merge branch 'ActorManager' of https://git-classes.mst.edu/tgw3ff/2021-sp-cs4096-97-tdg into ActorManager

Health and dash

The new sprite for the player character, as well as sprites for multiple
different enemies have been imported into the .../assets/ folder. The Player
actor now uses its updated texture and the Enemy actor now uses the "slime.png"
texture.

The Player and TestEnemy scripts now have added logic to flip their sprites
horizontally when changing horizontal directions.

Map generator

See merge request tgw3ff/2021-sp-cs4096-97-tdg!2

Added an algorithm in the Tileset.gd script that knows a set of 3x3 matrixes
that are not allowed to appear in the map, as they will cause texture
issues. The algorithm then replaces these occurences with matrices that
are allowed by the tileset. There are a few edge cases where there isn't a
texture for certain wall configurations, but it is considerably more rare now.

A quick algorithm also sprinkles at random some of the terrain tiles. Some are
collidable (like the boulders), and some are not (such as the grass). I will
replace this system for a much more robust one in the future.

The player scene now has a working camera node.

An enemy scene was also created. The enemy scene is identical in nearly all aspects except that it does not have a camera node and has the TestEnemy.gd script attached instead.