This project is about simulating a vehicle suspension with the physics engine. For each of the four shock absorbers a ray cast and a force is needed. I have already finished a first working version.
Here is a picture of the car. I modeled it in Wings3D.
Here is a video of the suspension. https://youtube.com/watch?v=liDbnFuYgK4
You can find the source of the project at "notabug.org". https://notabug.org/tomaga/VehicleSuspensionProject
Nice!