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**************************************************************************
* *
* NEED FOR SPEED II - DAT File format description - Version 0.1 *
* *
**************************************************************************
=========================================================================
NFS2 CAR PERFORMANCE FILE SPECS
=========================================================================
????.QDA PERFORMANCE FILE FORMAT:
WHERE:FIXED PT. = 32-BIT INTEGER
= FORMAT: (0x0000- 0000)
INT - FRACTION
OFFSET DESCRIPTION
------ -----------
0x000 WEIGHT / 2 IN FIXED PT.
MIN = 750(vw) MAX = 12000(bus)
0x004 NUMBER OF GEARS INCLUDING REVERSE AND NEUTRAL
MIN = 6 MAX = 8
0x008 VEHICLE CHASSIS TYPE
2 = TOUR BUS CLASS
4 = FORD INDIGO CLASS
6 = LOTUS GT1 CLASS
8 = MCLAREN CLASS
10 = CHEVY CLASS
12 = BMW CLASS
16 = VOLKS WAGON CLASS
24 = BUS CLASS
---------------------------------------------------
NOTE : THE NEXT 57 INTEGERS ARE ALL IN FIXED PT.
0x00C REVERSE : GEAR RATIO
0x010 NEUTRAL : ALWAYS ZERO
0x014 1ST : GEAR RATIO
0x018 2ND : GEAR RATIO
0x01C 3RD : GEAR RATIO
0x020 4TH : GEAR RATIO
0x024 5TH : GEAR RATIO OR ZERO IF 4 SPEED
0x028 6TH : GEAR RATIO OR ZERO IF 5 SPEED
-----------
BHP(BRAKE HORSE POWER)/GEAR MULTIPLIERS
0X10000 = 1* BHP/RPM VALUES DEFINED BELOW
0X20000 = 2* ECT.
0x02C REVERSE : GEAR BHP multiplier
0x030 NEUTRAL : GEAR BHP multiplier
0x034 1ST : GEAR BHP multiplier
0x038 2ND : GEAR BHP multiplier
0x03C 3RD : GEAR BHP multiplier
0x040 4TH : GEAR BHP multiplier
0x044 5TH : GEAR BHP multiplier
0x048 6TH : GEAR BHP multiplier
-----------
THE NEXT 41 VALUES INDICATE BHP AS A PERCENTAGE OF RPM
WITH THE FOLLOWING STRUCTURE:
0x04C BHP AT MIN RPM FOR ALL GEARS
TO
0x0EC BHP AT MAX RPM FOR ALL GEARS
---------
END FIXED PT. TABLES
-----------------------------------------------
0x0F0 MAX DEVELOPED RPM
0x0F4 MIN = 1e0000
MAX = 7e0000 (indigo)
0x0F8 ????
0x0FC ????
0x100 ????
---------
0x104 32 BYTES THAT CHANGING AND TESTING APPEAR TO DO NOTHING
TO
0x124
---------
0x124 ????
0x128 ????
0x12C STEERING/HANDLING :LARGER IS BETTER
---------
NOTE: HEAVY CARS HAVE LESS FOR NEXT 2 VALUES
MOST RACE CARS ARE 16/32
0x130 6 8 10 12 14 16 INDIGO 16
0x134 12 16 20 24 28 32 INDIGO 36
---------
0x138 MIN = 0xE666
MAX = 0x46666
SEMI HAS 0x10000
RACE CARS > 0x10000
0x13C ALL PTR*.QDA HAVE 0 GT1 HAS MAX VALUE (0xA3)
0x140 ????
0x144 ????
0x148 ????
0x14C ????
0x150 ????
0x154 ????
0x158 PIONEER ENGINE RPM
0x15C ????
0x160 ????
===========================
notes:
MOST ???? VALUES I HAVE CHANGED WITHOUT NOTICABLE AFFECTS.
The values to change that give the most satisfaction are:
maximun rpm
bhp/gear
steering
gear ratios
weight
vehicle chassis type
performance characteristics:
---------------------------
The calculations below depend on all bhp/rpm values(41 in all) being set to:
0x640000 (100 in fixed pt.)
where: gr = gear ratio of the gear of interest.
: rps = rpm/60.
: maxspeed = maximun obtainable speed of a particular gear.
: acceltime = time in seconds to accelerate to maxspeed
in a particular gear.
maxspeed == (max rpm * 2.165)/gr
and
a == a=(gr/rps @ 500 - gr/rps @ max rps)
dist == (maxspeed this gear-maxspeed last gear)*1.467
acceltime == (dist/a) * ((weight/bhp)/5)
note: maxspeed is accurate in top gear only if there is enough bhp.
---------------------------
Any comments or questions e-mail me at sselzer637@aol.com.
Special thanks to denis auroux who provided vital information and source code.
P.S. I NEED FILE SPECS FOR *.GEO FILES. ANY HELP ON THE STRUCTURE OF THESE FILES
WOULD BE
GREATLY APPRECIATED.
Included below is some initial info reguarding the structure of the car bitmap
files.
*.qfs car bitmap file info
the header
int "SHPI"
int file length
int directory entry count
int "GIMX"
end
each directory
int "name" as found in geo files
int offset from start of file to the bitmap header
end
bitmap header
int id= 0x2a=palette 0x7d=a "SHLB" 0x7b=std. bitmap
short width
short heigth
int ??
int ??
end
notes:
a char==0xff indicates a transparent bit
the first dir entry "0000" is the palette.
256 colors described as 1 int for each color.
red=color[0]
green-color[1]
blue=color[2]
0xff=color[3] = not used
i have displayed most of the .qfs files using the above info
and the graffic,s display perfectly.
does anybody know what a "SHLB" is????
bye!!
============================================================================
Fixed mass
number of gears (reverse + neutral + forward gears)
gear shift delay (ticks)
gear efficiency (array size 8)
velocity to rpm ratio (array size 8)
torque curve (array size 41) in 256rpm increments
engine redline in rpm
maximum velocity of car in m/s
front drive ratio
maximum braking deceleration
front bias brake ratio
gas increasing curve (array size 2)
gas decreasing curve (array size 2)
brake increasing curve (array size 2)
brake decreasing curve (array size 2)
wheel base
front grip bias
maximum steering acceleration
turn in ramp
turn out ramp
lateral acceleration grip multiplier
aerodynamic downforce multiplier
gas off factor
transfer factor
Slide Multiplier
Spin velocity cap
Slide Velocity Cap
Slide Assistance Factor
Push Factor
"Low Turn Factor (the lower the figure, the better the turn)"
"High Turn Factor (the lower the figure, the better the turn)"
* *
* NEED FOR SPEED II - DAT File format description - Version 0.1 *
* *
**************************************************************************
=========================================================================
NFS2 CAR PERFORMANCE FILE SPECS
=========================================================================
????.QDA PERFORMANCE FILE FORMAT:
WHERE:FIXED PT. = 32-BIT INTEGER
= FORMAT: (0x0000- 0000)
INT - FRACTION
OFFSET DESCRIPTION
------ -----------
0x000 WEIGHT / 2 IN FIXED PT.
MIN = 750(vw) MAX = 12000(bus)
0x004 NUMBER OF GEARS INCLUDING REVERSE AND NEUTRAL
MIN = 6 MAX = 8
0x008 VEHICLE CHASSIS TYPE
2 = TOUR BUS CLASS
4 = FORD INDIGO CLASS
6 = LOTUS GT1 CLASS
8 = MCLAREN CLASS
10 = CHEVY CLASS
12 = BMW CLASS
16 = VOLKS WAGON CLASS
24 = BUS CLASS
---------------------------------------------------
NOTE : THE NEXT 57 INTEGERS ARE ALL IN FIXED PT.
0x00C REVERSE : GEAR RATIO
0x010 NEUTRAL : ALWAYS ZERO
0x014 1ST : GEAR RATIO
0x018 2ND : GEAR RATIO
0x01C 3RD : GEAR RATIO
0x020 4TH : GEAR RATIO
0x024 5TH : GEAR RATIO OR ZERO IF 4 SPEED
0x028 6TH : GEAR RATIO OR ZERO IF 5 SPEED
-----------
BHP(BRAKE HORSE POWER)/GEAR MULTIPLIERS
0X10000 = 1* BHP/RPM VALUES DEFINED BELOW
0X20000 = 2* ECT.
0x02C REVERSE : GEAR BHP multiplier
0x030 NEUTRAL : GEAR BHP multiplier
0x034 1ST : GEAR BHP multiplier
0x038 2ND : GEAR BHP multiplier
0x03C 3RD : GEAR BHP multiplier
0x040 4TH : GEAR BHP multiplier
0x044 5TH : GEAR BHP multiplier
0x048 6TH : GEAR BHP multiplier
-----------
THE NEXT 41 VALUES INDICATE BHP AS A PERCENTAGE OF RPM
WITH THE FOLLOWING STRUCTURE:
0x04C BHP AT MIN RPM FOR ALL GEARS
TO
0x0EC BHP AT MAX RPM FOR ALL GEARS
---------
END FIXED PT. TABLES
-----------------------------------------------
0x0F0 MAX DEVELOPED RPM
0x0F4 MIN = 1e0000
MAX = 7e0000 (indigo)
0x0F8 ????
0x0FC ????
0x100 ????
---------
0x104 32 BYTES THAT CHANGING AND TESTING APPEAR TO DO NOTHING
TO
0x124
---------
0x124 ????
0x128 ????
0x12C STEERING/HANDLING :LARGER IS BETTER
---------
NOTE: HEAVY CARS HAVE LESS FOR NEXT 2 VALUES
MOST RACE CARS ARE 16/32
0x130 6 8 10 12 14 16 INDIGO 16
0x134 12 16 20 24 28 32 INDIGO 36
---------
0x138 MIN = 0xE666
MAX = 0x46666
SEMI HAS 0x10000
RACE CARS > 0x10000
0x13C ALL PTR*.QDA HAVE 0 GT1 HAS MAX VALUE (0xA3)
0x140 ????
0x144 ????
0x148 ????
0x14C ????
0x150 ????
0x154 ????
0x158 PIONEER ENGINE RPM
0x15C ????
0x160 ????
===========================
notes:
MOST ???? VALUES I HAVE CHANGED WITHOUT NOTICABLE AFFECTS.
The values to change that give the most satisfaction are:
maximun rpm
bhp/gear
steering
gear ratios
weight
vehicle chassis type
performance characteristics:
---------------------------
The calculations below depend on all bhp/rpm values(41 in all) being set to:
0x640000 (100 in fixed pt.)
where: gr = gear ratio of the gear of interest.
: rps = rpm/60.
: maxspeed = maximun obtainable speed of a particular gear.
: acceltime = time in seconds to accelerate to maxspeed
in a particular gear.
maxspeed == (max rpm * 2.165)/gr
and
a == a=(gr/rps @ 500 - gr/rps @ max rps)
dist == (maxspeed this gear-maxspeed last gear)*1.467
acceltime == (dist/a) * ((weight/bhp)/5)
note: maxspeed is accurate in top gear only if there is enough bhp.
---------------------------
Any comments or questions e-mail me at sselzer637@aol.com.
Special thanks to denis auroux who provided vital information and source code.
P.S. I NEED FILE SPECS FOR *.GEO FILES. ANY HELP ON THE STRUCTURE OF THESE FILES
WOULD BE
GREATLY APPRECIATED.
Included below is some initial info reguarding the structure of the car bitmap
files.
*.qfs car bitmap file info
the header
int "SHPI"
int file length
int directory entry count
int "GIMX"
end
each directory
int "name" as found in geo files
int offset from start of file to the bitmap header
end
bitmap header
int id= 0x2a=palette 0x7d=a "SHLB" 0x7b=std. bitmap
short width
short heigth
int ??
int ??
end
notes:
a char==0xff indicates a transparent bit
the first dir entry "0000" is the palette.
256 colors described as 1 int for each color.
red=color[0]
green-color[1]
blue=color[2]
0xff=color[3] = not used
i have displayed most of the .qfs files using the above info
and the graffic,s display perfectly.
does anybody know what a "SHLB" is????
bye!!
============================================================================
Fixed mass
number of gears (reverse + neutral + forward gears)
gear shift delay (ticks)
gear efficiency (array size 8)
velocity to rpm ratio (array size 8)
torque curve (array size 41) in 256rpm increments
engine redline in rpm
maximum velocity of car in m/s
front drive ratio
maximum braking deceleration
front bias brake ratio
gas increasing curve (array size 2)
gas decreasing curve (array size 2)
brake increasing curve (array size 2)
brake decreasing curve (array size 2)
wheel base
front grip bias
maximum steering acceleration
turn in ramp
turn out ramp
lateral acceleration grip multiplier
aerodynamic downforce multiplier
gas off factor
transfer factor
Slide Multiplier
Spin velocity cap
Slide Velocity Cap
Slide Assistance Factor
Push Factor
"Low Turn Factor (the lower the figure, the better the turn)"
"High Turn Factor (the lower the figure, the better the turn)"