Hello everyone, I’ve been programming a 3d car racing game in N64 style (hopefully I can end up with it on a N64) but I’ve run into a problem, I want to limit the speed on the local Z. Help would be much appreciated. thanks in advance.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class carDrive : MonoBehaviour
{
public float speed;
public float agility;
public Rigidbody rigidbody;
//public float maxspeed;
// Start is called before the first frame update
void Start()
{
rigidbody = GetComponent<Rigidbody>();
}
// Update is called once per frame
void Update()
{
float h = Input.GetAxisRaw("Horizontal") * agility;
rigidbody.AddRelativeForce(Vector3.forward * speed);
/*if (rigidbody.velocity.x > maxspeed)
{
rigidbody.velocity = new Vector3(maxspeed, rigidbody.velocity.y, rigidbody.velocity.z);
}
if (rigidbody.velocity.y > maxspeed)
{
rigidbody.velocity = new Vector3(rigidbody.velocity.x, maxspeed, rigidbody.velocity.z);
}
if (rigidbody.velocity.z > maxspeed)
{
rigidbody.velocity = new Vector3(rigidbody.velocity.x, rigidbody.velocity.y, maxspeed);
}*/
transform.RotateAround(transform.position, transform.up, Time.deltaTime * h);
}
}
I experimented for myself with the answer given on Discussions and found a way. The script below works both ways, if the speed is below the maximum speed or if it is above that speed.
The commented code at the bottom is a way to achieve speed limit that Unity Technologies doesn’t, apparently, recommend.
using UnityEngine;
public class RigidbodyVelocityLimitTest : MonoBehaviour
{
[SerializeField] private float speed, maxSpeed;
private Rigidbody rigidBody;
private float velocityX, velocityY, brakeForce;
private void Start()
{
// Accessing the rigidbody
rigidBody = GetComponent<Rigidbody>();
// Storing velocities
velocityX = rigidBody.velocity.x;
velocityY = rigidBody.velocity.y;
}
private void FixedUpdate()
{
// Moving the vehicle
VehicleMovement();
}
private void VehicleMovement()
{
if (Input.GetKey(KeyCode.UpArrow))
{
rigidBody.velocity = new Vector3(velocityX, velocityY, speed);
// Making sure the vehicle speed is limited
// My way
// Getting the rigidbody velocity in unit per second
float magnitude = rigidBody.velocity.magnitude;
if (magnitude != maxSpeed)
{
rigidBody.velocity = new Vector3(velocityX, velocityY, brakeForce);
float diffSpeed = magnitude - maxSpeed;
switch (diffSpeed)
{
case > 0:
brakeForce = magnitude - diffSpeed;
break;
case < 0:
brakeForce = maxSpeed;
break;
default:
break;
}
}
}
}
// Apparently non-recommended way of achieving speed limit
/*private void SpeedLimit()
{
if (rigidBody.velocity.magnitude > maxSpeed)
{
rigidBody.velocity = rigidBody.velocity.normalized * maxSpeed;
}
}*/
}
But, if you want, you can get to the wanted speed directly:
private void VehicleMovement()
{
if (Input.GetKey(KeyCode.UpArrow))
{
rigidBody.velocity = new Vector3(velocityX, velocityY, maxSpeed);
}
}
