Question Car Falling through Ground Plane

This is frustrating and I can't figure it out.

When I hit the Play button, a car I have set up keeps falling through the ground and the tires fly off.

I have set up the car with a Rigidbody component (Mass = 1200) and a Box Collider on it.

I have applied Wheel Collider components to the game objects named, WheelColliderLeftFront, etc. I sized the colliders and placed them within the wheel meshes.

The ground plane has a box collider and I set the Constraints to be active for Position X, Y, and Z.

What have I done wrong?

 

Which version cause the last two versions have different collider and rigid body layers
A lot of the times Unity sets a tag to blank depending on the asset, see if it’s on default

 

The car now drops to the surface of the race track while the wheels drop through the race track and continue to fall downward.

 

Could check in edit/project settings/physics/simulation mode and see if it’s on fixed update is goes on script by default
Or play with the physics table at the bottom to see if the wheel collier layer and the ground layer are checked
Do the colliders have a script on them?

 

The Car itself has the script. It's one I typed while watching Imphenzia on YouTube:

The matrix at the bottom of the Physics preferences are all checked.


using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Car : MonoBehaviour
{
public WheelCollider wheelColliderLeftFront;
public WheelCollider wheelColliderRightFront;
public WheelCollider wheelColliderLeftBack;
public WheelCollider wheelColliderRightBack;

public Transform wheelLeftFront;
public Transform wheelRightFront;
public Transform wheelLeftBack;
public Transform wheelRightBack;

public float motorTorque = 100f;
public float maxSteer = 20f;


void FixedUpdate()
{
wheelColliderLeftBack.motorTorque = Input.GetAxis("Vertical") * motorTorque;
wheelColliderRightBack.motorTorque = Input.GetAxis("Vertical") * motorTorque;
}

}

 

Okay, I see what I did wrong. I didn't add the following to the bottom of the script:


void Update()
{
var pos = Vector3.zero;
var rot = Quaternion.identity;

wheelColliderLeftFront.GetWorldPose(out pos, out rot);
wheelLeftFront.position = pos;
wheelLeftFront.rotation = rot;

wheelColliderRightFront.GetWorldPose(out pos, out rot);
wheelRightFront.position = pos;
wheelRightFront.rotation = rot;

wheelColliderLeftBack.GetWorldPose(out pos, out rot);
wheelLeftBack.position = pos;
wheelLeftBack.rotation = rot;

wheelColliderRightBack.GetWorldPose(out pos, out rot);
wheelRightBack.position = pos;
wheelRightBack.rotation = rot;
}

This attaches the colliders and wheels together, and to the car.

 

cool

 

Again, the wheels drop off the car and fall through the surface of the plane.

I've tripled-checked the settings.

I am dying here!

 

The Wheel meshes need to be set to IsKinematic in the Rigidbody components.

 

Maybe mess with the
Interpolate on the rigibody
Like ragdoll flop all over if the rigibodies aren’t set to Continuous Speculative and set to kinematic

 

Cool
Good luck with ur project

 

Since ur here answering
What does Calling BeginWrite before EndWrite mean it’s giving nothing to go on?
And why does Unity only answer certain problems?

 

An error on the console Calling EndWrite before BeginWrite
I asked for some with Asset Refresh Plugin
Error before and nothing any idea what it is referring to?
If I knew I’d get rid or try to fix something but what?

 

I’m not trying to take over this thread
Wow
I just figured u knew that’s why I asked
Cause ur Unity

 

My fault but the guy asked a week ago and u didn’t answer him u answered my post
He was asking for help first, thanks for letting me know about other questions on other posts I’m gonna unwatch this thread sorry