BaECar

A Godot based prototype driving sim. Supports controller and keyboard. Currently still very hacky and contentless, but there's a little track to lap. The driving aspect of this is something I'm reasonably happy with by now

• V0.0.5 - Removed Continous Collision Detection for more stable wall collisions
• V0.0.6
  • Added a system to back off steering angle under deceleration, hopefully making the car more stable
  • Reduced total brake torque from 3000Nm to 2700Nm
  • Adjusted the tyre in combined friction scenarios
• V0.0.7
  • Changed the system to adjust steering angle with decel to one that piles on more lock if while decelerating and steering to improve stability
  • Adjusted a few car parameters to take advantage of the new stability
  • Further adjusted the tyre in combined friction scenarios
• V0.0.8
  • Overhauled the steering system by burying my head in Race Car Vehicle Dynamics.
  • Retuned the tyre model to not halve its grip the moment the car got a slide on.
  • Moved brake bias fowards a touch.
• V0.0.9
  • Car now has a torque curve instead of constant torque.
  • Car uses the throttle model described here: https://boostandethanol.neocities.org/blog/i-m-sick-so-heres-a-devlog-on-throttl...
  • Tyres now have less grip at higher slip, but should be progressive enough to be driveable.
  • Grip dropoff with slip ratios now made sharper. Moved brake bias fowards a touch more.
• V0.0.10
  • HUD is now anchored correctly so going into full screen doesn't move it to strange places.
  • Redid tyre load sensitivity, car has less grip than previously.
  • Slightly tweaked steering speed
  • Wall reactions have been tuned
  • Minor brake tweaks
• V0.0.11
  • Added a clutch! Now you can rev in neutral and maybe get some slip in other gears if you really screw up.
  • Brake application is now non-linear, uses an exponent of 2.5.
  • Brake torque reduced to 2500Nm.
  • Added low speed stability as described in: https://journals.sagepub.com/doi/abs/10.1177/0954407018807040
  • Load sensitivity is changed to a different formula.
• V0.0.12
  • Fixed a major bug with the dampers which meant they were applying upwards force from the car accelerating, and a downward force from deceleration.
    • Therefore car is much softer than previously possible.
  • Anti-roll bars have been added to reduce body roll.
  • Tyre in combined grip is now much more gradual than previously.
  • Updated to Godot 4.4, which seems to have fixed some collision inconsistencies between the editor and the release. Less (hopefully no) random spinning to a stop crashes from grazing walls now.
  • Renamed the .exe :)
  • testing
• V0.0.13
  • Totally redid the tyre model. Sim uses a new Bezier curve system for the lateral grip as of this update.
  • Car now uses the lateral slip velocity, as opposed to the slip angle, to find lateral force.
  • New steering filter which should hopefully make the car much less twitchy.
  • Fixed a bug with the differential under braking that generated more braking torque than existed.
  • Brake now has a smoothing function as you increase brake percentage to make it easier to find peak slip.
  • Animated-ish water!
  • Brake bias moved back to 65% front
• V0.0.14
  • New steering filter added that for once actually steers where you point the stick.
  • New clutch model that's much smoother than the previous model, and less hacky behind the scenes, mostly based off the model described by Wolfe in this post: https://lupine-vidya.itch.io/gdsim/devlog/677594/workshop-v-start-your-engines-m...
  • Fixed a bug that made the anti-roll bars twice as effective as they should be.