How do I make a rocket?

Question

I'm trying to create a rocket, where you would press the space bar, and hold it to keep going up, and you could use wasd to control which way the rocket faces. How would I create a rocket like this? I had looked at a video of how to do it with constant force, but for some reason Unity came up with an error that "constantForce" was obsolete. I found that strange especially since it was a component that I could add to the rocket itself. Any help?

Answer 1

Answer by Developer1212 · Nov 06, 2016 at 09:46 PM

You can use the AddForce () function instead of the constant force function.

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Makri907 · Nov 06, 2016 at 10:33 PM 0

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Rigidbody.AddForce() only applies force for one frame and returns to zero. Constant force is constantly applying force and only changes when the force or torque value is changed.

Developer1212 · Nov 06, 2016 at 10:37 PM 1

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Not if you use it like this:

 if (Input.Get$$anonymous$$ey($$anonymous$$eyCode.Space)) {
 rigidbody.AddForce (Vector3.something * Time.deltaTime);
 }

Answer 2

IMPORTANT: Be sure to add a Constant Force Component to your rocket. Create a C# script on your rocket and attach this to it:

     ConstantForce thrust;
             public Vector3 rocketDirection;
             Vector3 copy;
             public float xlrate;
             void Start () {
                 thrust = gameObject.GetComponent<ConstantForce> ();
                 copy = rocketDirection;
             }
             
             void Update () {
                 if (xlrate >= 20f) {
                     xlrate += .025f;
                 }
                 if (Input.GetKey (KeyCode.Space)) {
 thrust.force = rocketDirection * xlrate;
                     rocketDirection = copy;
                 }
                 if (Input.GetKeyUp (KeyCode.Space)) {
 thrust.force = rocketDirection * xlrate;
                     rocketDirection = Vector3.zero;
                 }
             }
         }

Note: Set the xlrate to something reasonable like 2 or 3. And for the Y position on rocketDirection, somewhere between 10 and 20.

How do I make a rocket?

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