Developing Car Simulation (with demo)

Community Showcases
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Hi! For the past couple of months I’ve been developing a custom wheel collider/vehicle physics package that has finally reached a stage where it’s fun to drive and where the cars behave somewhat realistic. The tire model uses pacjeka with beckman combined slip. The simulation includs :

  • Clutch simulation
  • Downforce simulation
  • Diffrential simulation (locked, open, limited slip) with support for multiple diffrentials
  • Springs and dampers, rebound etc
  • Dynamic suspension geometry effects such as toe-in, camber.

You can try it out and leave feedback if you’d like to. The cars and tracks are not mine and full credit for those goes to the creators. They are placeholder that have been used while working on the physics.

Controls for the demo :
w,a,s,d - throttle, brake and steering
e - gear up
q - gear down
left ctrl - clutch
c - switch camera
v, b, n - orbit camera in exterior view
esc - return to menu

Link to demo

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Screenshot from HDRP test build

2 Likes
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New build with reworked suspension code and a new car :

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New track.

2 Likes
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Just wondering, is it raycast based?

1 Like
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Yes right now it’s based on two raycasts per wheel, on the inner and outer wall of the wheel. These are then combined :slight_smile:

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is there a webgl version?

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Not right now. Are you having trouble with the demo?

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Are those cars intented to drift?

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Not really. But they are all RWD except for the aventador which is AWD, therefore they can drift. The goal is to have realistic physics

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Thanks, i like it (i do not like the “realistic cars” that are intended to just drift -.-)

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Me neither I’ve always prefered car games with realistic response rather than arcade style games. Glad you liked it :slight_smile:

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Very nice looking demo :slight_smile: I am trying it with an XBox controller and cant seem to find an imput that does any braking, and also the car just wants to go right all the time making it impossible to drive. Do you have any deadzones set at all?

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i thought there was a problem with my controller, so, it is the demo jaja, but with the keyboard works fine

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I haven’t had the possibility to try it with a controller so that’s probably the issue. However the braking is tied to the vertical axis so it’s wierd that your throttle works but not your braking. I’ll look into it

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Looks sweet! When I saw the words “car simulation” I thought it was gonna be that basic Unity car demo again. This is…uhh…a bit nicer. :stuck_out_tongue:

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Thank you! Glad you liked it. This one should be a tad more realistic;)

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Nice. Is there any copyright on the cars?

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Since I’m not earning any money by using them and also state clearly that they aren’t mine, I don’t think there would be any problem concerning copyright? If I’m wrong, I’ll remove them.

1 Like
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Nice work. I especially like the sense of speed in the tracks. Keep working on it. Btw, how did you implement the blur effect?