User:Polavux/Technical:Bloons TD 5 (multiplatform)/Tracks

Track lists

The list of tracks that can be played in-game normally are defined in tracklist.json for singleplayer and coop_tracklist.json for Co-op. Both files use the same structure. Any tracks without an entry in either of these files in the vanilla game are exclusive to Special Missions and events or are unused.

Key	Description	Type	Required?	Behavior when absent
Size		Array of numbers
DifficultyColours	The colour values to use when displaying a track's name. Each array is three entries long and the values correspond to the red, green, and blue channels in that order.	Array of array of numbers
DifficultyDescriptions	The localisation keys for the difficulty levels.	Array of numbers
Tracks	The list of track entries.	Array of arrays

Track entries

Index	Description	Type	Required?	Behavior when absent
0	The track difficulty. 0: Beginner 1: Intermediate 2: Advanced 3: Expert 4: Extreme	Integer
1	The track ID.	String
2	The track's localisation key.	String
3	The number of tracks of the previous difficulty the player is required to win on to unlock this track. Can be set to 0 or -1 to disable this requirement.	Integer
4	The rank the player is required to reach to unlock this track. Can be set to 0 or -1 to disable this requirement.	Integer
5	Indicates if the track has water. If true, the Monkey Sub and Monkey Buccaneer can be randomly selected on this track in Daily Challenges.	Boolean
6	Indicates if the track is new to this version. If true, this track displays a special highlight on the track selection menu.	Boolean
7	If true, this track is hidden from the menu until the player meets its unlock criteria.	Boolean		Defaults to false
8	A list of tower IDs of towers the player must unlock in order to unlock this track.	Array of strings

LevelDefinitions

Map file

Key	Description	Type	Required?	Behavior when absent
Music	The background music.	String
entryMarkers	The positions of the entrance markers that appear when the track is loaded. In each entry, the first element is an array of two elements representing the X and Y coordinates in units, and the second element is the rotation in degrees.	Array of arrays
reverseEntryMarkers	Same as above, but for Reverse mode.	Array of arrays
ipadEntryMarkers		Array of arrays
ipadReverseEntryMarkers		Array of arrays
Modifiers		Array of strings
BossSpawn	In Bloons Monkey City, this is the ID of the boss to spawn after starting the first round (0 = Bloonarius, 1 = Vortex, 2 = Dreadbloon, 3 = Blastapopoulos). This also exists in Bloons TD 5, but is unused and has no apparent functionality.	Integer
Effects	A list of visual effects to apply. "Fireworks": displays a fireworks show if the player wins the map (used on Fireworks) "Snowfall": displays falling snow particles that are layered over all other sprites (used on The Rink and some other snow tracks) "AnimatesBetweenRounds": idk but it's used on North Pole	Array of strings
OnNewGame	Unused.	Object

Mask file

Uses a custom .mask file format, which is essentially a bitmap. Some tracks in the console version (apparently the ones that had to be modified to define the extra horizontal space) use a slightly different format.

Header

Address	Address (console)	Description	Size
—	0x0000	The first four bytes are always "NKBM" (Ninja Kiwi bitmap?), and the meaning of the last eight are unknown.	4 bytes
—	0x0004	Unknown.	8 bytes
0x0000	0x000C	The width of the track in units.	4 bytes
0x0004	0x0010	The height of the track in units.	4 bytes

Data

The rest of the file is a series of run-length encoded byte pairs. The first byte of a pair is the length of the run in pixels from left to right, wrapping when it reaches the width of the mask. The second byte of a pair defines the terrain.