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The (whole) structure and content of PHYSICS.DAT

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Geert

Joined: 09 Sep 2004
Posts: 420

Posted: Sat Jan 29, 02:16

SHITE!! What was I thinking ??? Well, Ok, I simply lost track of time ... and I got slighly pissed on beer in the process as well. My slight intoxication notwithstanding, I'm on my way to shedding light on the physics.dat file of RBR. EDIT Ok, next day, and I've finished the research into physics.dat. Each car has 3 set-up ranges, which dictate the minimum and maximum values of each parameter, and the step size. These are setup spec 0, 1 and 2 . Next to that each car has 3 set-ups, which I assume to be the default set-ups. These are dummymin 0, 1 and 2 Also, each car has a "fixed" list with properties that remain unchanged by any changes in set-up, such as weight (inverse) and body parts. Physics.dat also contains information on tracktion for ALL the surfaces, properties for all moveable and non moveable objects and traction information on tyres, as wel as some flags for debugging and logging. Here's the whole structure, minus the binairy stuff on top. In the next post I will make I will shed more light on separate parts of the structure. My comments are in bold red. Cars are in yellow . Other code is in orange . NOTE: All PhysicsEngine fixed car properties can be found in the /cars/[name]/commons.lsp file too. I have no idea which one overrules the other. ==== BEGIN XSARA PhysicsEngine (fixed car properties) DefManager Car body Car root ( CarId 0 = Xsara ) hinged body parts mounted body parts PhysicsEngine (variable car properties, depends on setup and tyre choice) DefManager Wheel car setup spec 0 Num Parts (Complete parts tree) Range for set-up parameters, with engine options (dummymax 0, dummymin 0) Range for set-up parameters, with engine options (dummymax 0, dummymin 2) Range for set-up parameters, with engine options (dummymax 0, dummymin 1) Actual car setup with Engine dummy 0 Actual car setup with Engine dummy 2 Actual car setup with Engine dummy 1 PhysicsEngine (variable car properties) with Setup Spec 2 PhysicsEngine (variable car properties) with Setup Spec 1 ==== END XSARA Note that dummymax is the same as the carid and dummymin is tied to the track surface type: Gravel, Tarmac or Snow. ==== BEGIN HYUNDAI PhysicsEngine (fixed car properties) DefManager Car body Car root ( CarID 1 = Hyundai ) hinged body parts mounted body parts physics engine (variable car properties) for setup spec 0 Num Parts (Complete parts tree) range for set-up parameters --> dummymax 1, dummymin 0 range for set-up parameters --> dummymax 1, dummymin 2 range for set-up parameters --> dummymax 1, dummymin 1 Actual car setup with engine dummy 0 Actual car setup with engine dummy 2 Actual car setup with engine dummy 1 physics engine (variable car properties) for setup spec 2 physics engine (variable car properties) for setup spec 1 ==== END HYUNDAY ==== NON-CAR code Physics engine information: Special flags, debug flags and log flags ==== END NON-CAR code ==== BEGIN MG ZF PhysicsEngine (fixed car properties) DefManager Car body Car root carId 2 ( is MG ZR) engine turbo 0 Volume Efficiency Curve Drive Drive type 3 (is front wheel drive!) Control unit RPM limit hinged body parts mounted body parts PhysicsEngine (variable car properties, depends on setup and tyre choice) DefManager car root setup spec 0 Wheel car Num Parts (Complete parts tree) range for set-up parameters --> dummymax 2, dummymin 0 range for set-up parameters --> dummymax 2, dummymin 2 range for set-up parameters --> dummymax 2, dummymin 1 Actual car setup, engine dummy 0 Actual car setup, engine dummy 2 Actual car setup, engine dummy 1 PhysicsEngine (variable car properties) for setupspec 2 PhysicsEngine (variable car properties) for setupspec 1 ==== END MG ZF ==== TYRE INFORMATION This is the same information as can be found in pirelli/tyres.lsp and michellin/tyres.lsp. I have no idea which version overrules the others. Tyre type 00 - tarmac dry properties (dimension, stiffness, weight, wear, grip, etc) Tyre type 01 - tarmac intermediate Tyre type 02 - tarmac wet Tyre type 03 - gravel dry Tyre type 04 - gravel intermediate Tyre type 05 - gravel wet Tyre type 06 - snow ==== END TYRE INFORMATION ==== BEGIN LANCER PhysicsEngine (fixed car properties) DefManager car body car root ( CarId 3, Lancer) hinged body parts mounted body parts PhysicsEngine (variable car properties) DefManager wheel car setup spec 0 Num Parts (Complete parts tree) range for set-up parameters --> dummymax 3, dummymin 0 range for set-up parameters --> dummymax 3, dummymin 2 range for set-up parameters --> dummymax 3, dummymin 1 Actual car setup, engine dummy 0 Actual car setup, engine dummy 2 Actual car setup, engine dummy 1 PhysicsEngine (variable car properties) setup spec 2 PhysicsEngine (variable car properties) setup spec 1 ==== END LANCER ==== OTHER PHYSICS This bit is identical to the information in physics.lsp PhysicsEngine (other objects) ground width height top left solid generic iCollisionmesh solid traffic cone inverse mass inverse centre of gravity (??) various "sleep" parameters (???) solid pig/street sign/banner fence solid log/log pole/wooden fence bar/wooden fence pole car root drive light system control unit maximum time step minimum time delta brake wall properties with forced material vector of gravity FLAGS DEBUG FLAGS LOG FLAGS collision solver properties material manager (surface types and objects) all surfaces, gravel, tarmac, snow, grass, dirt various depths, various wetness Again, the above is identical to physics.lsp ==== END OTHER PHYSICS ========== SECOND SET (??) TYRE INFORMATION ============== Again, this is the same information as can be found in pirelli/tyres.lsp and michellin/tyres.lsp. Tyre type 00 - tarmac dry properties (dimension, stiffness, weight, wear, grip, etc) Tyre type 01 - tarmac intermediate Tyre type 02 - tarmac wet Tyre type 03 - gravel dry Tyre type 04 - gravel intermediate Tyre type 05 - gravel wet Tyre type 06 - snow ========== END TYRE INFORMATION ========== ==== BEGIN PEUGOT PhysicsEngine (fixed car properties) DefManager Car root Engine turbo 1 Volume Efficiency curve hinged body parts mounted body parts PhysicsEngine (variable car properties, depends on setup and tyre choice) DefManager Wheel car body car root (CarId 04 = Peugot 206 setup spec 0) Num Parts (Complete parts tree) All set-up parameters, dummymax 4, dummymin o All set-up parameters, dummymax 4, dummymin 2 All set-up parameters, dummymax 4, dummymin 1 NOTE: this car has 7 gears instead of 8: 1 reverse, 1 neutral, 5 forward Actual car setup, engine dummy 0 Actual car setup, engine dummy 2 Actual car setup, engine dummy 1 PhysicsEngine (variable car properties) with setup spec 2 PhysicsEngine (variable car properties) with setup spec 1 ==== END PEUGOT ==== BEGIN IMPREZA '00 Actual car setup, engine dummy 0.000000 Actual car setup, engine dummy 0.000000 Actual car setup, engine dummy 0.000000 Yes, 3 times the same engine dummy number, I have no clue why. Each actual set-up differs from the other PhysicsEngine (fixed car properties) DefManager car body car root (CarId 7 = Impreza '00) hinged body parts mounted body parts PhysicsEngine (variable car properties) DefManager car root SetupSpec 0 Wheel Num Parts (Complete parts tree) All set-up parameters, dummymax 7, dummymin 0 All set-up parameters, dummymax 7, dummymin 2 All set-up parameters, dummymax 7, dummymin 1 Actual car setup dummy engine 0 Actual car setup dummy engine 2 Actual car setup dummy engine 1 Note that these 3 set-ups DO each have a different engine dummy number. PhysicsEngine (variable car properties) DefManager car root SetupSpec 2 Wheel PhysicsEngine (variable car properties) DefManager Wheel car body car root Setupspec 1 ==== END IMPREZA '00 ==== BEGIN IMPREZA '03 PhysicsEngine (fixed car properties) DefManager car body car root (CarId 5 = Impreza '03) hinged body parts mounted body parts PhysicsEngine (variable car properties) DefManager car root SetupSpec 0 Wheel Num Parts (Complete parts tree) All set-up parameters, dummymax 5, dummymin 0 All set-up parameters, dummymax 5, dummymin 2 All set-up parameters, dummymax 5, dummymin 1 Actual car setup dummy engine 0 Actual car setup dummy engine 2 Actual car setup dummy engine 1 PhysicsEngine (variable car properties) DefManager car root SetupSpec 2 Wheel PhysicsEngine (variable car properties) DefManager Wheel car root SetupSpec 1 ==== END IMPREZA '03 ==== BEGIN COROLLA PhysicsEngine (fixed car properties) DefManager car body car root (CarId 6 = Corolla) hinged body parts mounted body parts PhysicsEngine (variable car properties) DefManager Wheel car root SetupSpec 0 Num Parts (Complete parts tree) All set-up parameters, dummymax 6, dummymin 0 All set-up parameters, dummymax 6, dummymin 2 All set-up parameters, dummymax 6, dummymin 1 Actual car setup dummy engine 0 Actual car setup dummy engine 2 Actual car setup dummy engine 1 PhysicsEngine (variable car properties) DefManager Wheel car root SetupSpec 2 PhysicsEngine (variable car properties) DefManager Wheel car root SetupSpec 1

Geert

Joined: 09 Sep 2004
Posts: 420

Posted: Sat Jan 29, 18:32

DefManager contains several sub items: Car root usually contains "static" information on the car, parameters that do not change when set-ups change. Among these, the detacheable parts and swiveling parts: ____ Car root ____ ____ car ID (in this case 0) ____ ____ inverse mass ____ ____ inverse local inertia vector ____ ____ effective wheel radius ____ ____ max steering lock ____ ____ steering rack ratio ____ ____ frontal area ____ ____ drag coefficient ____ ____ subtics 1 (??) ____ ____ Drive (inertia of gearbox, wheels, # of gears) ____ ____ Control unit ____ ____ centerdif handbrake release ____ ____ LFB threshold ____ ____ icollision mesh 1 (whatever that is...) ____ ____ ____ ____ hinged body parts ____ ____ ____ Door left properties ____ ____ ____ Door right properties ____ ____ ____ bonnet ____ ____ ____ Exhaust pipe ____ ____ mounted body ____ ____ ____ front bumper properties ____ ____ ____ rear bumper properties ____ ____ ____ car wing properties wheel contains mount geometry, tyre, sping and damper info: Wheel ____ wheel ( x 4) ____ ____ Do Suspension Sweep 0 (????) ____ ____ inverse wheel mass ____ ____ debug ID ____ ____ is steered (1 or 0) ____ ____ wishbone length ____ ____ vector for joint mount VF (???) ____ ____ vector for joint axis VF ____ ____ vector for steering mount VF ____ ____ vector for steering axis VF ____ ____ vector for drive axle joint position VF ____ ____ vector for strut rod mount SF ____ ____ vector for strut hub point SF ____ ____ vector for strut hub axis SF ____ ____ strut dimension (x axis) ____ ____ strut dimension (z axis) ____ ____ drive axle mount offset ____ ____ wishbone sign (vector direction) ____ ____ steering sign (vector direction) ____ ____ anti roll bar ID ____ ____ anti roll bar slot ____ ____ vector for top mount deform up axis RF ____ ____ vector for top mount deform side axis RF ____ ____ top mount max deformation sideways ____ ____ top mount max deformation up ____ ____ ____ spring damper ____ ____ ____ Inner bump rubber position ____ ____ ____ outer bump rubber position ____ ____ ____ damping bump rubber ____ ____ ____ bump rubber stiffness ____ ____ ____ ____ tyre properties ____ ____ ____ Debug ID ____ ____ ____ carcass stiffness lateral ____ ____ ____ carcass stiffness torsional ____ ____ ____ reference friction ____ ____ ____ hub offset ____ ____ ____ carcass width ____ ____ ____ carcass radius ____ ____ ____ tread depth ____ ____ ____ tread width DefManager contains another car root item, under the sub heading car : car ____ car root ____ ____ setup spec 0, 1, 2 Last edited by Geert on Sat Jan 29, 18:37; edited 1 time in total

Geert

Joined: 09 Sep 2004
Posts: 420

Posted: Sat Jan 29, 18:35

Num Parts contains the complete parts tree with replacement time, including time deviation, importance of the part, name and ID) ____ windshield ____ bodywork ____ headgasket ____ front bumber ____ rear bumber ____ rear wing ____ left door ____ left door lock ____ right door ____ right door lock ____ bonnet ____ bonnet lock ____ exhaust ____ exhaust mount ____ front diff ____ centre diff ____ rear diff ____ brake circuit ____ electrical ____ hydraulics ____ oilcooler ____ battery ____ gearbox ____ ____ clutch ____ gear actuator ____ starter ____ radiator ____ water pump ____ oil pump ____ turbo ____ ____ turbo hosing ____ intercooler ____ wheel (for all 4 individual wheels) ____ tyre (for all 4 individual wheels) ____ ____ top mount ____ ____ hub ____ ____ ____ damper ____ ____ ____ ____ drive shaft ____ ____ ____ ____ control arm ____ ____ ____ ____ steering rod ____ ____ ____ ____ brake disc ____ ____ ____ ____ ____ brake caliper ____ ____ ____ ____ ____ ____ brake pad ____ right front wheel ____ right front tyre ____ ____ ____ left rear wheel ____ left rear tyre ____ right rear wheel ____ right rear tyre

Geert

Joined: 09 Sep 2004
Posts: 420

Posted: Sat Jan 29, 18:41

Car Options: Gives the range in which all the parameters in the set-up can be set, and the stepsize for each parameter. There is a set of ranges for each road surface. Engine dummy number determines which. ____ Max steering lock Max / Min / Step ____ front roll barr stiffness Max / Min / Step ____ rear roll barr stiffness Max / Min / Step ____ centre of gravity coordinate ____ inverse mass ____ Complete torque curve Drive Options ____ number of gears ____ front brake presence (0 or 1) ____ rear brake presence (0 or 1) ____ front brake pressure Max / Min / Step ____ rear brake pressure Max / Min / Step ____ left (?) front brake properties (inertia, mass, pistonarea, etc.) ____ right (?) front brake properties (inertia, mass, pistonarea, etc.) ____ [same for rear] ____ center / front / rear diff Max / Min / Step ____ gear list: 13 gears, pinion, gear, min and max torque ____ 2 gears reverse, 1 gear neutral, 10 positive (forward) gears ____ gear0 is gear list 2 (min and max are the same) ____ gear1 is gear list 0 (min and max are the same) ____ gear2 is gear list 3 (min and max are the same) ____ gear3 is gear list 4 (min and max are the same) ____ gear4 is gear list 5 (min and max are the same) ____ gear5 is gear list 6 (min and max are the same) ____ gear6 is gear list 7 (min and max are the same) ____ gear7 is gear list 8 (min and max are the same) ____ ____ final drive is gear list 9 (min and max are the same) ____ Drop Gear Option minimum 10, maximum 12 NOTE: Drop Gear Option 10, 11 or 12 is low/medium/high gearing. Control Options ____ diff map lock range Max / Min / Step ____ diff map speed range Max / Min / Step ____ center diff handbrake release Max / Min / Step ____ left foot brake threshold Max / Min / Step Engine Options ____ dummymin = 0, 1, 2 = road surface this set-up range is for. ____ dummymax = CarId ____ dummy step 0 Spring damper options (for all 4 individual wheels) ____ spring length Max / Min / Step ____ spring stiffness Max / Min / Step ____ helper spring length Max / Min / Step ____ helper spring stiffness Max / Min / Step ____ damper bump Max / Min / Step ____ damper rebound Max / Min / Step ____ damper bump high speed Max / Min / Step ____ damper speed brake Max / Min / Step Tyre Options (for all 4 individual wheels) ____ Pressure Max / Min / Step Wheel Options (for all 4 individual wheels) ____ ____ Vectors for all 6 top mount positions ____ steering rod Max / Min / Step ____ Wheel axis inclination Max / Min / Step ____ platform height Max / Min / Step ____ (dummy) wishbonelenght ____ Vector for Joint Mount VF (??) ____ Vector for joint axis VF ____ Vector for steering mount VF ____ Vector for Strut rod mount SF (??) ____ Vector for strut hub point SF ____ Vector for Strut hub axis SF ____ Strut dimension X-axis ____ Strut dimension y-axis ____ Sign (direction) of wishbone and strut ____ Anti roll bar ID number ____ Anti roll bar slot ____ inner bump position ____ outer bump position Last edited by Geert on Sat Jan 29, 18:46; edited 1 time in total

Geert

Joined: 09 Sep 2004
Posts: 420

Posted: Sat Jan 29, 18:43

car setup , each car has 3 of these, for all 3 surfaces. ____ car ____ ____ max steerling lock ____ ____ front roll bar stiffness ____ ____ rear roll bar stiffness ____ drive ____ ____ front diff max torque ____ ____ center diff max torque ____ ____ rear diff max torque ____ ____ max brake pressure front ____ ____ max brake pressure rear ____ ____ gear id 0 through 7 ____ ____ final drive id ____ ____ drop gear id (Gearing low/medium/high) ____ engine ____ ____ Dummy 0, 1, 2 Note: The engine dummy number determines to which of the road surfaces the particular setup belongs. ____ vehiclecontrolunit ____ ____ Center diff handbrake release ____ ____ left foot brake threshold ____ ____ center diff throttle curve ____ ____ center diff brake curve ____ ____ center speed map velocity and factor curve ____ ____ [All curves for left foot brake center diff] ____ ____ [All curves for front diff] ____ ____ [All curves for rear diff] ____ All wheel positions (4 separate wheels) ____ ____ top mount slot ____ ____ vector top mount slot ____ ____ steering rod length ____ ____ strut platform height ____ ____ wheel axis inclination ____ ____ All spring and damper settings (4 separate positions) ____ ____ length ____ ____ stiffness ____ ____ helper spring length mininum ____ ____ helper spring lenght ____ ____ damping bump ____ ____ damping rebound ____ ____ bump high speed break/threshold ____ ____ damping bumb high speed ____ ____ ____ All 4 individual tyre pressures ____ ____ ALL suspension geometry ____ ____ ALL springs and damper settings ____ ____ ALL tyre pressure

Geert

Joined: 09 Sep 2004
Posts: 420

Posted: Sat Jan 29, 18:49

Tyre Types: Tyre type 00 - tarmac dry properties Tyre type 01 - tarmac intermediate Tyre type 02 - tarmac wet Tyre type 03 - gravel dry Tyre type 04 - gravel intermediate Tyre type 05 - gravel wet Tyre type 06 - snow Tyre Parameters: ____ type ____ rim radius ____ inner radius of rim ____ hub offset ____ carcass width ____ carcass radius ____ tread depth ____ tread width ____ carcass thickness ____ tread coverage ____ sidewall height ____ pressure ratio ____ tread elasticity ____ carcass stiffness lateral ____ carcass stiffness torsional ____ carcass stiffness vertical ____ wetness design ____ wetness wear factor ____ (static?) friction vs temp curve ____ wear factor vs temp curve ____ wet slope (??) vs temp curve ____ (static?) friction factor vs pressure curve ____ "RubMy" (???) factor vs temp curve ____ rubber wear vs temp curve ____ CrnStf (cornering stiffness?) vs L parameter (??) ____ TrctSft (traction stiffness?) vs L parameter ____ CrnMy (cornering "My") factor vs L parameter ____ TrctMy (traction "My") factor vs L parameter ____ SlpPkCrn (slip "Pk" cornering) vs L parameter ____ SlpPkTrct (slip "pk" traction) vs L parameter

Geert

Joined: 09 Sep 2004
Posts: 420

Posted: Sat Jan 29, 18:54

... And ... fi... fina.... finally ... The rest of the items of the physics.dat file: PhysicsEngine (other objects) ____ ground ____ ____ width ____ ____ height ____ ____ top ____ ____ left ____ solid generic ____ ____ iCollisionmesh ____ solid traffic cone ____ solid pig ____ solid street sign ____ solid banner fence ____ solid log ____ ____ inverse mass ____ ____ inverse centre of gravity (??) ____ ____ various "sleep" parameters (???) Surfaces: ____ undefined ____ Gravel_Fine_Shallow_Dry ____ US2_Gravel_Fine_Shallow_Dry ____ Gravel_Fine_Deep_Dry ____ US2_Gravel_Fine_Deep_Dry ____ Gravel_Fine_Deeper_Dry ____ US2_Gravel_Fine_Deeper_Dry ____ Gravel_Medium_Shallow_Dry ____ Gravel_Medium_Deep_Dry ____ Gravel_Medium_Deeper_Dry ____ Gravel_Coarse_Shallow_Dry ____ BR2_Gravel_Coarse_Shallow_Dry ____ Gravel_Coarse_Deep_Dry ____ BR2_Gravel_Coarse_Deep_Dry ____ Gravel_Coarse_Deeper_Dry ____ BR2_Gravel_Coarse_Deeper_Dry ____ Gravel_Fine_Shallow_Damp ____ US2_Gravel_Fine_Shallow_Damp ____ Gravel_Fine_Deep_Damp ____ US2_Gravel_Fine_Deep_Damp ____ Gravel_Fine_Deeper_Damp ____ US2_Gravel_Fine_Deeper_Damp ____ Gravel_Medium_Shallow_Damp ____ Gravel_Medium_Deep_Damp ____ Gravel_Medium_Deeper_Damp ____ Gravel_Fine_Shallow_Wet ____ US2_Gravel_Fine_Shallow_Wet ____ Gravel_Fine_Deep_Wet ____ US2_Gravel_Fine_Deep_Wet ____ Gravel_Fine_Deeper_Wet ____ US2_Gravel_Fine_Deeper_Wet ____ Gravel_Coarse_Shallow_Damp ____ BR2_Gravel_Coarse_Shallow_Damp ____ Gravel_Coarse_Deep_Damp ____ BR2_Gravel_Coarse_Deep_Damp ____ Gravel_Coarse_Deeper_Damp ____ BR2_Gravel_Coarse_Deeper_Damp ____ Gravel_Coarse_Shallow_Wet ____ BR2_Gravel_Coarse_Shallow_Wet ____ Gravel_Coarse_Deep_Wet ____ BR2_Gravel_Coarse_Deep_Wet ____ Gravel_Coarse_Deeper_Wet ____ BR2_Gravel_Coarse_Deeper_Wet ____ SnowOnGravel_Shallow ____ SnowOnGravel_Medium ____ SnowOnGravel_Deep ____ Snowwall_Bottom ____ Gravel_Medium_Shallow_Wet ____ Gravel_Medium_Deep_Wet ____ Gravel_Medium_Deeper_Wet ____ Tarmac_Fine_Clean_Dry ____ Tarmac_Fine_Clean_Damp ____ Tarmac_Fine_Clean_Wet ____ Tarmac_Medium_Clean_Dry ____ Tarmac_Medium_Clean_Damp ____ Tarmac_Medium_Clean_Wet ____ Tarmac_Coarse_Clean_Dry ____ Tarmac_Coarse_Clean_Damp ____ Tarmac_Coarse_Clean_Wet ____ Gravel_Fine_Shallow_Dry_Clone ____ Gravel_Fine_Shallow_Damp_Clone ____ Gravel_Fine_Shallow_Wet_Clone ____ Tarmac_Fine_Sprinkled_Dry ____ Tarmac_Fine_Sprinkled_Damp ____ Tarmac_Fine_Sprinkled_Wet ____ Tarmac_Fine_Covered_Dry ____ Tarmac_Fine_Covered_Damp ____ Tarmac_Fine_Covered_Wet ____ Tarmac_Medium_Sprinkled_Dry ____ Tarmac_Medium_Sprinkled_Damp ____ Tarmac_Medium_Sprinkled_Wet ____ Tarmac_Coarse_Sprinkled_Dry ____ Tarmac_Coarse_Sprinkled_Damp ____ Tarmac_Coarse_Sprinkled_Wet ____ Tarmac_Medium_Covered_Dry ____ Tarmac_Medium_Covered_Damp ____ Tarmac_Medium_Covered_Wet ____ Tarmac_Coarse_Covered_Dry ____ Tarmac_Coarse_Covered_Damp ____ Tarmac_Coarse_Covered_Wet ____ Grass_Hard_Dry ____ Grass_Hard_Damp ____ Grass_Hard_Wet ____ Grass_Medium_Dry ____ Grass_Medium_Damp ____ Grass_Medium_Wet ____ Grass_Soft_Dry ____ Grass_Soft_Damp ____ Grass_Soft_Wet ____ SnowOnIce_Shallow ____ SnowOnIce_Medium ____ SnowOnIce_Deep ____ Rough_Rough_Dry ____ Rough_Rough_Wet ____ Dirt_Hard_Dry ____ Dirt_Hard_Damp ____ Dirt_Hard_Wet ____ Dirt_Hard_Dry_Clone ____ Dirt_Hard_Damp_Clone ____ Dirt_Hard_Wet_Clone ____ Rough_VeryRough_Dry ____ Rough_VeryRough_Wet ____ Dirt_Medium_Dry ____ Dirt_Medium_Damp ____ Dirt_Medium_Wet ____ Dirt_Soft_Dry ____ Dirt_Soft_Damp ____ Dirt_Soft_Wet ____ Tree_Stump ____ Bendable_Tree ____ Rock_Small ____ Water_Surface ____ Very_Sparse_Bush ____ Sparse_Bush ____ Dense_Bush ____ Very_Dense_Bush ____ Spret_Bush_Small ____ Spret_Bush_Meduim ____ Spret_Bush_Large ____ Lov_Bush_Small ____ Lov_Bush_Medium ____ Lov_Bush_Large ____ Tree_Small ____ Tree_Medium ____ Tree_Large ____ Rock_Medium ____ Rock_Large ____ Trunk_Small ____ Trunk_Medium ____ Trunk_Large ____ Metal_Pole ____ Snowwall ____ Spectator

Geert

Joined: 09 Sep 2004
Posts: 420

Posted: Sun Jan 30, 23:05

After sifting through the physics.dat file yesterday, I've found out some more information. The car-specific files in physics.rbz are also present in physics.dat , but the values in the separate files override the values in the physics.dat file! ... Important to know, I'd say. Also, the separate files do not completely cover all the parameters that are in physics.dat. (For instance, the ranges for the diff set-up are not in the .lsp files.) common.lsp holds car information that is set-up independent. snow.lsp holds the wheel information that is part of the section SetupSpec 2 in physics.dat tarmac.lsp holds the wheel information that is part of the section SetupSpec 1 in physics.dat gravel.lsp holds the information that is part of the section SetupSpec 0 in physics.dat r_snow.lsp holds a lot of the set-up ranges (not but not ALL) for engine dummy 2 r_tarmac.lsp holds a lot of the set-up ranges (not but not ALL) for engine dummy 1 r_gravel.lsp holds a lot of the set-up ranges (not but not ALL) for engine dummy 0 repair.ini holds the whole parts tree with all parts that can possibly break, the time it takes to replace them, including a time variance.

ppj13

Joined: 28 Oct 2004
Posts: 47

Posted: Thu Feb 03, 20:43

Ooo I know they could include most of those variables just to impress modders, but the mere possibility (induced by those names) of the game calculating mcpherson 3D geometry real-time is a big for me. _________________ Football, tennis, golf need a ball to play. Rallying needs two.

stenyak

Joined: 04 May 2003
Posts: 737

Posted: Sat May 14, 00:44

Geert wrote:

____ ____ various "sleep" parameters (???)

These sleep parameters are most probably data that tells the physics engine how/when to make the logs physics sleep.
In physics simulations where there's a big amount of dynamic objects, there's a usual optimization method which consists on disabling their physics when their speed is below a threshold value, or when they're out of sight, etc... So that's what the sleep parameters most probably refer to.
For example, logs will only have physics after you hit them with the car. And then, once they are lying in the ground stopped, their physics will be disabled again (until you hit them again). This can save a lot of CPU time in some cases.
_________________
For simracers, by simracers - MOTORSPORT
Richard Burns Rally Car Manager - RBRCM
_________________ STK

GabkicksX

Joined: 23 Dec 2004
Posts: 167

Posted: Sat Jul 23, 02:23

I wanted to modify the physics for a car to have a full manual tranny. (no auto clutch when shifting) How do i do this?

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