How do I increase a speed variable over time?

Questions & Answers
1

I just need my car that follows way-points to go 0 to 30 in “x” amount of seconds after its ray shows a false hit. I’m trying to understand mathf functions but everything I try isn’t working. Please help. Thanks!

using UnityEngine;
using System.Collections;

public class rayCast_car2 : MonoBehaviour
{
    public GameObject car_1;
    public float distanceToSee = 6f;

    private bool targetHit;
    private civic2MoveOnPath script;

    void Start()
    {
        script = car_1.GetComponent<civic2MoveOnPath>();
    }

    void Update()

    {


        RaycastHit hit;
        Ray slowDown = new Ray(transform.position, transform.forward * distanceToSee);
        Debug.DrawRay(transform.position, transform.forward * distanceToSee, Color.magenta);
        {
            if (Physics.Raycast(slowDown, out hit, distanceToSee))
            {
                if (hit.collider.name == "Body Collider" && !targetHit)
                {
                    Debug.Log("hit");
                    targetHit = true;
                    script.speed = 0f;
                }
            }
            else if (targetHit)
            {
                Debug.Log("Not Hit");
                targetHit = false;
                script.speed = 30f;
            }
        }
    }
}
2

Your question is little vague of what you actually need, but here is example code that would change speed over time until target is met.

using UnityEngine;

public class SpeedExample : MonoBehaviour
{
    float currentSpeed = 0f;
    float targetSpeed = 30f;
	
	void Update ()
	{
        if (currentSpeed < targetSpeed)
            currentSpeed += Time.deltaTime;
	}
}