Cars

Game/Cars/ holds 22 cars. Each has a three-character code, one .cin file and about 22 model and texture files. The display names are lines 195-216 of g<language>.txt (full names) and 217-238 (short names). The code-to-name pairing below is by name; the order of the exe's own car table is still to be read.

Code	Car	Code	Car
foc	Ford Focus	int	Lancia Integrale
f99	Ford Focus 1999	ia1	Lancia Integrale Alternate 1
fa1	Ford Focus Alternate 1	ia2	Lancia Integrale Alternate 2
fa2	Ford Focus Alternate 2	sie	Ford Sierra Cosworth
mit	Mitsubishi Lancer	min	Mini Cooper S
ma1	Mitsubishi Lancer Alternate 1	6r4	MG Metro 6R4
ma2	Mitsubishi Lancer Alternate 2	str	Lancia Stratos
ma3	Mitsubishi Lancer Road Car	205	Peugeot 205 Turbo 16
cor	Toyota Corolla	pum	Ford Racing Puma
sub	Subaru Impreza	esc	Ford Escort Mk1
206	Peugeot 206	sea	Seat Cordoba

The disc also has three aud* files (an Audi, no .cin), not referenced by the car table.

Front-end pictures: FrontEnd/res*.bfl members <fe-code>b01.tga / f01.tga (back/front), with the front-end codes from the exe (f2000, lncer, crlla, crdba, delta, serra, strts, escort, ...).

Files per car

The name pattern is <code><set><n>, built by Car_Load 0x457000 (%s%c%d.bfl, A1N.c3d, L.c3d, S.c3d) and 0x4760a0 (%sa5, %sc5). For the Focus 1999:

File	Content
f99.cin	Car info (below)
f99a1.bfl + f99a1N.c3d, f99a1L.c3d, f99a1S.c3d	Set a, exterior: DXT5 textures (37), the full model (15 objects, 1,166 vertices) and two 344-vertex models (L and S are byte-identical for this car)
f99a5.bfl + f99a5.c3d	Set a, interior (cockpit view): affint01.dds, revct.dds (rev counter)
f99c1.bfl + .c3d	Set c, exterior: the same textures as TGA (cffdbobu.tga)
f99c3.bfl + .c3d	Set c, a lower level of detail (9 objects, 887 vertices)
f99c5.bfl + .c3d	Set c, interior
f99d1, f99d3, f99e3	Further levels of detail (550, 505, 400 vertices)
f99f3, f99f4	The lowest level (2 meshes, 189 vertices); f3 and f4 are identical here

So the letter is a detail level (a highest, with DXT textures; c, d, e, f lower, TGA) and the digit a part (1 exterior, 3 exterior at lower detail, 4 far, 5 interior). This reading comes from the file sizes and member names; confirm it in Car_Load, which picks the sets from the game mode (cases 5, 6, 7, 11, 12 change the choice) and the number of players (split screen uses lower sets).

Models are PP_F kind 6. Object/mesh names give the parts: 01LFWhlLowL (left front wheel, low), 05BonCamDay (bonnet camera), 06IntArc, 08BodyArc, 14LigEffect (light effects). Damage, wheels and lights are driven per part.

.cin (car info)

676 to 1,068 bytes, no magic, loaded whole by Car_Load 0x457000 (%s.cin, kept per car at 0x5429c8). It starts with a directory of six u16 offsets from the start of the file (f99.cin: 0x00c, 0x1a0, 0x204, 0x258, 0x2a8, 0x2e4; the first is always 0x00c, the size of the directory). Car_CinSection 0x457e10 returns section n of a car (confirmed). The sections are almost entirely 16.16 fixed point (0x00003333 = 0.2, 0x0000cccc = 0.8, 0x00010000 = 1.0, negatives as two's complement). Readers:

Section	Read by	Content (inferred)
0	0x463fe0	0x2c-byte records with a 16.16 position, two 16.16 factors (0.2, 0.8) and a byte code: light and effect emitters (headlights, brake lights, exhaust)
3	0x4809e0	16.16 vectors, used when the cars are placed for the race
5	0x476540
any	0x486700, 0x494bb0, 0x498dd0 (section chosen by the caller)

Sections 1, 2 and 4 are reached through the callers that pass the index; their contents are read when those functions are ported.

Handling

The handling model is not a data file. It is in the simulation code (0x428000-0x445000), all 16.16 fixed point ((int64)a * b >> 16):

• Base parameters are immediates in Car_Init 0x43c7f0 (confirmed): a switch on the car's handling class (0 to 13; the third argument, replaced in some modes through 0x40ee90) stores about ten 16.16 values per class into the car state (+0x1f8, +0x1fc, +0x200, +0x764 to +0x774, +0x788, +0x794) plus one per-class constant (0x3e80000, 0x4000000, ...). As instruction operands they are ported as code, with the original's values, not as a table.
• Ported (src/sim/car.c, checked by tests/sim_test.c on the 205): the class table, the set-up bytes (7 per car at 0x52f0e0, or a default per rally at 0x520128-0x520144). These are applied as:
  • suspension: 0x43dff0;
  • gears: 0x43e1f0, five sets of neutral, six forward and reverse, divided by 1.14;
  • brakes: 0x43e530;
  • differential: +0x7b4;
  • the box corners: 0x43eef0, 0x43f280.
• The rest of the car is set up in the same function from the model (wheel positions from the .c3d parts, +0x360..0x378) and the game options, and in 0x43e680 afterwards.
• The car state is 0xc24 bytes per car in the block at *0x53c9a4 (pointers per car at 0x53aba8, Car_Get 0x42b5f0); the simulation addresses the current car through DAT_0053cc18. Known fields: controls +0x1d0..0x1dc (see the replay frame in stages), handling class +0xb1a, step counter +0xb43, step fraction +0xa90, step rate +0xa98 (float, 25.0), models +0x71c / +0x720.
• DAT_0053cc1c is not the handling parameters (corrected): it is the car's damage record, one of 0x4d0 bytes per car (array at *0x588b94, with a second 0x290-byte record per car at *0x588b98), set up by 0x4667c0 and reached through 0x469680. The functions 0x4669f0-0x469b00 deform and detach the model's parts from it.

Car sounds

Sounds/Car/<engine>.bfl (12 engines: 205, 206, corolla, cosworth, delta, focus, lancer, metro, mini, seat, stratos, subaru), each a set of engine loops as 16-bit PCM WAVs.