how to slow down speed increase?

Question

I am using this script on a space ship, the negative values make the ship go in reverse. it works exactly as I want it to, except I want the speed to increase more slowly, I would like the speed to increase by 10 units a second. can someone give me some tips as to how I would achieve this

 using UnityEngine;

using System.Collections;

public class SpeedControl : MonoBehaviour {

 [SerializeField]
 float speed = 2.0f;

 public float trueSpeed = 0.0f;
 public static string speedDisplay;
 // Use this for initialization
 void Start () {

 }
 
 // Update is called once per frame
 void Update () {

     float power = Input.GetAxis("Power");

             if (trueSpeed < 100 && trueSpeed > -30){
         trueSpeed += power;
     }
     if (trueSpeed > 100){
         trueSpeed = 99.99f;    
     }
     if (trueSpeed < -30){
         trueSpeed = -29.99f;    
     }
     if (Input.GetKey("backspace")){
         trueSpeed = 0;

     }
     speedDisplay = trueSpeed.ToString("0.0");

     rigidbody.AddRelativeForce(0,0,trueSpeed*speed*Time.deltaTime);
 }

 }

Answer 1

Best Answer

Answer by slay_mithos · Nov 06, 2014 at 07:57 AM

If you want the acceleration to be slower, but keeping the min/max speed, changing: float power = Input.GetAxis("Power");

into: float power = Input.GetAxis("Power")*0.5f;

Should half your speed increase.

This does not increase by 10 per second, because the whole point of the script is to handle the stick from a gamepad (the more you push it, the more it accelerates).

For a flat increase, you would want your "power" to use a hard number.

For a stable 10 per second, you would need to multiply 10 with Time.deltaTime (see http://docs.unity3d.com/ScriptReference/Time-deltaTime.html for an example)

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Scotty_P · Nov 06, 2014 at 08:05 AM 0

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no, that will work fine for what I need, thank you very much

Answer 2

Answer by b1gry4n · Nov 06, 2014 at 08:24 AM

Alternatively you could utilize : http://docs.unity3d.com/ScriptReference/Mathf.SmoothDamp.html

     float velocity = 1.0f;
     float currentSpeed = 0.0f;
     float maxSpeed = 100.0f;
     float dampen = 25.0f;
     void Update () {
         currentSpeed = Mathf.SmoothDamp(currentSpeed, maxSpeed, ref velocity, Time.deltaTime * dampen);
         Debug.Log(currentSpeed);
     }

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how to slow down speed increase?

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