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Back to Math and Physics

Simple ray-cast vehicle

Math and Physics Programming

Started by ongamex92 March 31, 2018 11:29 AM

1 comment, last by Edy 6 years, 2 months ago

ongamex92

3,287

Author

March 31, 2018 11:29 AM

Hi guys,

I want to write a really basic raycast vehicle(a car with 4 wheel that can steer). I tried to come up with the math's myself, but the result isn't good the car isn't stable, and oscillates up an down?
Do you know any good tutorial on how to do it?

Currently I do a raycast, and if the distances is lower than the distance my tire what's to be I apply this force (which really doesn't work):
forcePerTire = RaycastDir * (hitDistance / IdealTireDistance) * forceMultiplier;

I guess this is more a hoverboard, not a car,

Edy

373

April 09, 2018 10:29 PM

You have to add some damping to the suspension, otherwise it would hardly stop oscillating. A basic suspension could be implemented like this (pseudocode):


contactDepth = maxHitDistance - hitDistance;
contactSpeed = (lastContactDepth - contactDepth) / deltaTime;
lastContactDepth = contactDepth;

springForce = contactDepth * springRate;
damperForce = contactSpeed * damperRate;

forcePerTire = RaycastDir * (springForce + damperForce);

You would then configure the suspension with the springRate and damperRate parameters.

Edy / @VehiclePhysics
vehiclephysics.com