Creating quick Afterburner ?

Getting Started
1

I have this code, which moves the drone around with vertical axis

public float movementForwardSpeed = 500.0f;
    private float tiltAmountForward = 0;
    private float tiltVelocityForward;
    void MovementForward()
    {
        if (Input.GetAxis ("Vertical") != 0) {
            ourDrone.AddRelativeForce (Vector3.forward * Input.GetAxis ("Vertical") * movementForwardSpeed);
            tiltAmountForward = Mathf.SmoothDamp (tiltAmountForward, 20 * Input.GetAxis ("Vertical"), ref tiltVelocityForward, 0.1f);
        }
    }

i’m trying to have quick afterburner where when a Key is pressed, the movementforward speed changes to say 3000 for 1 second then back to normal speed, giving arcadey afterburner effect… but i’m not sure how to do this? i’ve tried waitForSeconds or starting a coroutine but both give errors… any suggestions ?

2

If you’d like some help on the code you tried - for instance the coroutine, please post the code so people can see it :slight_smile:

3

Oh, that’s true, i just thought the little ways i tried are so petty and so not worth posting, but anyway for example i tried this way:

    public float BurstSpeed = 1000.0f;
    public float CurrentSpeed;
    public float movementForwardSpeed = 500.0f;
    private float tiltAmountForward = 0;
    private float tiltVelocityForward;

    void Start ()
    {
        CurrentSpeed = movementForwardSpeed;
    }
    void MovementForward()
    {
        if (Input.GetAxis ("Vertical") != 0) {
            DroneRB.AddRelativeForce (Vector3.forward * Input.GetAxis ("Vertical") * CurrentSpeed);
            tiltAmountForward = Mathf.SmoothDamp (tiltAmountForward, 20 * Input.GetAxis ("Vertical"), ref tiltVelocityForward, 0.1f);
        }
        if (Input.GetKey (KeyCode.Space)) {
            StartCoroutine (AfterBurner);
        }
    }

    private IEnumerator AfterBurner()
    {
        CurrentSpeed = BurstSpeed;
        yield return new WaitForSeconds (2f);
        CurrentSpeed = movementForwardSpeed;
    }
4

Okay, so I think you just forgot ’ () ’ in your call to the coroutine. If you add that, is it doing what you want?

StartCoroutine(Afterburner());
5

Nope :frowning:

What i need sounds really simple, when Space is pressed, CurrentSpeed = BurstSpeed for 2 seconds, then CurrentSpeed is back to being movementForwardSpeed

but i can’t figure out something for it

6

I think you want to use KeyDown and you probably only want to call this once per burst. Try this…

if (Input.GetKeyDown (KeyCode.Space) && CurrentSpeed != BurstSpeed) {
            StartCoroutine (AfterBurner());
        }

another way is this…

if (Input.GetKeyDown (KeyCode.Space) && CurrentSpeed != BurstSpeed) {
            CurrentSpeed = BurstSpeed;
            Invoke (ResetSpeed, 2.0f);
        }

void ResetSpeed() {
        CurrentSpeed = movementForwardSpeed;
    }

HTH

7

I’m sorry, that is correct; you should only allow it to activate once until it’s done. I was trying to answer why the coroutine didn’t start, and didn’t “complete” the rest of the code for the situation.

You could also use a bool to indicate you’re using the afterburner.

8

yeah, for some reason none of the methods here work, the boost only stays for about half a second then goes, so i think i’ll change the system to meter system where if the meter at 0% then boost is not available and recovers automatically when boost is not used.

9

Ah okay. Are you saying the boost wasn’t staying because you stopped giving input?
Or even with input it stopped?