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Alternate Physics 0.3b for RFPE Mod 0.4 (gravel improvement) (ALL CARS ADDED) 0.3b

Modified CTF Physics to be used with RFPE Mod 0.4

Tags:
  1. exbagboy
    Ver 0.3b
    Previous version I erroneously thought values for wet gravel were independently set which is why heavy/medium gravel felt like mud even in dry conditions. Gravel grip increased to match dry conditions.



    Ver 0.3

    Reworked the difference between rolling or optimal friction to final/sliding friction to match real world data (WRC articles).

    Tarmac grip falls down by 26% Dry/ 20% Wet for Germany so sliding is only recommended in sharp turns and hairpins, otherwise you are losing too much grip (just like in real life)

    Gravel and snow falls down by 10% so there is still grip to be had in the stalled region (optimal slip angle 15-16 ° based on real WRC data)

    New slip angles for Tarmac 6.2 ° (more response from steering wheel)

    Increased slip angle for Gravel to a more realistic 16° for Gravel, 15° for Snow, Ice 12.3° (winter studded tire used as reference)

    Fixed Rallycross (AI drivers don't spin out in certain sections) 7° slip angle for Tarmac ( from Cooper Tyre data)


    Fixed R4 cars, don't feel floaty, wheel spin is properly modeled.

    More info coming. if anybody has articles, real world data for rally send it my way.

    Method to my madness below,

    ps (friction values for ice/snow not comparable to other surfaces, ice values is higher than gravel but still feels lower in game because of other factors controlled by the game for that surface, including but not limited to rolling resistance. )

    Graphs for Grip vs Slip Ratio



    [​IMG][​IMG][​IMG]

    Grip vs Slip Angles.


    [​IMG][​IMG][​IMG]

    In Codemasters defense, their grip values for tarmac in modern Rallycross are already lower than Germany and the loss of grip is 20%(more realistic) than the 12% loss on germany tarmac.
    Original Alpine A110 also has very different grip values than the rest, probably since it's the lightest of all the cars, much lower grip values for all surfaces.








    0.2 Version with all cars

    Added Pikes Peak, 2000s, Rallycross, 1960s, 1970's.

    Other changes:

    Improved inertia values for most cars and other small tweaks.
    Cars are more planted at higher speeds and bumps, subtle change from 0.1.
    Found grip values for Wet Gravel, reduced accordingly for Finland Pikes Peak and Wales. Much more fun in the rain!

    Input is appreciated!!!


    INSTRUCTIONS:

    1. Have RFPE 0.4 installed, (available on this site)

    2. Extract all CTF files in main Dirt Rally folder then start RFPE mod 0.4 and play.

    I'd like to thank the creators of the RFPE mod and Forzakof for all the hard work. Also thanks to Avo77 for pointing out how to mod the rest of the cars. Would love some input from experienced sim racers and real drivers.

Recent Reviews

  1. Ferdimage
    Ferdimage
    5/5,
    Version: 0.3b
    Thanks for fixing the heavy gravel grip. It no longer feels like ice using the Group B 4wd cars!
    1. exbagboy
      Author's Response
      Thanks, I wish the game would let me edit wet gravel separately from heavy gravel like it does for tarmac.
  2. oz555
    oz555
    5/5,
    Version: 0.3
    I was absolutely gutted with the regression of the Dirt Rally physics model as the game developed., particularly on Tarmac. These two mods have transformed the game for me. Utterly gripping in Germany and Monte Carlo. Loving the way sheet ice effects the car. I'm Still getting to grips with the gravel handling, possibly a little too much steering input required, but that may well be the way I have my wheel set up. Your time and patience is much appreciated. Thank you. (will post on RFPE as well .)
    1. exbagboy
      Author's Response
      Try the new version, before there was too much sliding on gravel because I was setting up wet gravel which I thought was independent from heavy/medium gravel.
  3. mr.Twister
    mr.Twister
    3/5,
    Version: 0.3
    Nice idea but terrible realisation! Man, gravel is not same as snow on summer tires! Your graphics are very interesting, but better just try to drive a couple of turns on gravel in real life and you'll understand everything!))) Just do it & keep your work! Good luck
    1. exbagboy
      Author's Response
      You're absolutely right, the game engine has 2 spots for gravel and I thought I was modding for mud/wet gravel independently which is why it's so slippery but that value is being applied to dry gravel as well. I'll have to re-work gravel.
      I am still getting similar times to real WRC times for the last section of Bidno Mooreland but I am sliding a lot more than real rally drivers.
  4. Dienqn
    Dienqn
    5/5,
    Version: 0.3
    Muy bueno! Me costo un poco al principio pero luego lo senti más real que nunca!
  5. miky90
    miky90
    5/5,
    Version: 0.3
    A-M-A-Z-I-N-G!!! Keep going on this(-;
  6. Ferdimage
    Ferdimage
    5/5,
    Version: 0.2
    Its amazing how much this has transformed the game, You have to drive more carefully and on loose gravel you can overshoot while braking.

    Keep up the improvements mate!
  7. DZGAMER
    DZGAMER
    5/5,
    Version: 0.2
    keep up great work !
  8. tonio duran
    tonio duran
    5/5,
    Version: 0.2
    GOOD
  9. RayNOS
    RayNOS
    5/5,
    Version: 0.2
    Very good work! Thanks a lot!

    If it possible to teach rallycross AI to drive with new physics? Now they spinoff a lot in corners.
    1. exbagboy
      Author's Response
      I tried to get them at a level where they weren't spinning out anymore, have you tried the harder difficulty? I'll pm you.
  10. Ret00797
    Ret00797
    5/5,
    Version: 0.2
    Thank you.
    I appreciate people working to do more enjoyable this great game. Don't stop, please!!
    :)
  11. Liviu Tiron
    Liviu Tiron
    5/5,
    Version: 0.1
    Please continue your good work!
    1. exbagboy
      Author's Response
      Released a version with all cars. Input is appreciated.
  12. Ferdimage
    Ferdimage
    5/5,
    Version: 0.1
    Great job on enhancing the RFPE mod, question are the AI affected by the mod too? Or do they perform as stock physics?
    1. exbagboy
      Author's Response
      You mean the AI times for the rally stages? or the Rallycross cars? I'm in the middle of adding Rallycross, I will let you know how it affects their cars.
  13. Rudy Pessotto
    Rudy Pessotto
    5/5,
    Version: 0.1
    Thanks for this mod,i have one for dirt3,but for dirt4 can not open CTF files .
    1. exbagboy
      Author's Response
      Thanks, working on adding the rest of the 27 cars.
  14. NulTweeZes
    NulTweeZes
    5/5,
    Version: 0.1
    Thanks a lot! The game was transformed with RFPE mod and now again with your files.
    1. exbagboy
      Author's Response
      Thanks, working on adding the rest of the 27 cars.