Track file

General infos

One of the most interesting features of Stunts is the possibility to create your own tracks, whatever the editor you choose to do so.

Each track is composed of 30x30 squares, one byte for each square. That is 900 bytes for track layout, with 1 additionnal byte for horizon. Terrain information (fills, water) is recorded the same way, that is 900 bytes for terrain information too. Last byte is a padding zero. Therefore, any track file (extension .TRK) should be 1,802 bytes long.

Track layout starts at offset 0x0000. Horizon is at offset 0x0384. Terrain information starts at offset 0x0385 and the zero byte is at offset 0x0709. Information is recorded row by row : left to right, bottom to top for the track layout block but left to right and top to bottom for the terrain block.

Terrain codification

Adapted from Jonas Baehr's page ^[2]

Key to the table columns:

• Element: Terrain element name.
• Orientation reference: for elements with multiple possible orientations, the feature of the element to which the orientation columns refer to.
• Orientation: Orientation of the reference feature. "Any" indicates there is just one orientation. The other columns refer to map sides as cardinal points (N, S, W, E = top, bottom, left, right). The ">" sign indicates direction, so S>N means vertical orientation, bottom to top. Compass points indicate the corners of a tile or element (NW, SW, SE, NE = top left, bottom left, bottom right, top right).

To find the hexadecimal value for a certain element, find its entry under the row of the element name and the column of the desired orientation.

Element	Orientation reference	Orientation
		Any	NW	SW	SE	NE	S>N	E>W	N>S	W>E
Flat ground		00
Water		01
Diagonal coast	Corner inside water		05	02	03	04
Flat hill		06
Hill slope (straight)	Uphill direction						07	08	09	0A
Angled slope (outer edge)	Heightened corner		0B	0C	0D	0E
Angled slope (inner edge)	Lowered corner		11	12	0F	10

Track codification

(to be completed - for the moment, see the external links ^[2])

Adapted from Jonas Baehr's page ^[2]

Key to the table columns:

• Element: Terrain element name.
• Orientation reference: for elements with multiple possible orientations, the feature of the element to which the orientation columns refer to.
• Orientation: Orientation of the reference feature. "Any" indicates there is just one orientation. The other columns refer to map sides as cardinal points (N, S, W, E = top, bottom, left, right). The ">" sign indicates direction, so S>N means vertical orientation, bottom to top. Compass points indicate the corners of a tile or element (NW, SW, SE, NE = top left, bottom left, bottom right, top right).

To find the hexadecimal value for a certain element, find its entry under the row of the element name and the column of the desired orientation.

As the description of the orientation of some track pieces can be quite complex, the codes are presented in multiple tables to facilitate comprehension. We suggest you to use the "Find" command of your browser for efficiently locating the track elements.

Linear elements

Element	Orientation reference	Orientation
		Any	S>N	E>W	N>S	W>E
Blank		00
Paved s/f line	Track direction		01	B5	B3	B4
Dirt s/f line	Track direction		86	89	87	88
Icy s/f line	Track direction		93	96	94	95
Paved road	Track direction		04	05
Dirt road	Track direction		0E	0F
Icy road	Track direction		18	19
Paved crossroad		4A
Dirt crossroad		7D
Icy crossroad		8A
Elevated road	Track direction		22	23
Solid el. road	Track direction		63	64
Overpass	Bridge direction		65	66
Elevated span	Track direction		67	68
Regular ramp	Ascending direction		26	25	27	24
Bridge ramp	Ascending direction		3A	39	3B	38
Solid ramp	Ascending direction		61	60	62	5F
Left-handed cork u/d	Ascending direction		75	76	77	78
Right-handed cork u/d	Ascending direction		79	7A	7B	7C
Loop	Track direction		40	41
Cork l/r	Track direction		55	56
Tunnel	Track direction		42	43
Slalom road	Track direction		73	74
Regular pipe	Track direction		44	45
Pipe with obstacle	Track direction		53	54
Pipe entrance	Entering pipe direction		46	48	47	49
Highway	Track direction		6D	6E
Highway entrance	Entering highway direction		6F	72	71	70

Horizon codification

• 0x00 Desert
• 0x01 Tropical
• 0x02 Alpine
• 0x03 City
• 0x04 Country
• 0x05 Chaotic scenery (can make the game react weird sometimes)

External links

• 1. ^back Online track viewer (by Jonas Baehr)
• 2. ^back Hex codes for terrain and track elements (by Jonas Baehr)