Need help with flying script

Hoi guys,

I geuss this qeustion is asked before but i can't find a answer that helps me.
I want to make a speeder (like the one in starwars on courosant). The model is coming along, but the script isn't.
I am trying to use AddForce to move it and make it fly. My current script is this:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class flying : MonoBehaviour {
5.  
6.     public float speed;
7.     public float hover;
8.     public float turnleftright;
9.     public float turnupdown;
10.     public float rotatespeed;
11.     public float movement;
12.     public Quaternion rotation = Quaternion.identity;
13.     public float rotationx;
14.     public float rotationy;
15.     public float rotationz;
16.     public Vector3 AddPos;
17.     public float vary;
18.  
19.     // Use this for initialization
20.     void Start () {
21.  
22.         hover = 50;
23.         //rotatespeed = 35;
24.    
25.     }
26.    
27.     // Update is called once per frame
28.     void Update (){
29.  
30.         ///////////////////////////////// key press for gas////////////////////////////
31.         if (Input.GetKey ("space") && movement <= 5)
32.         {
33.             movement = movement + speed;
34.         }
35.         else if (Input.GetKey ("space") && movement >= 5)
36.         {
37.             movement = movement;
38.         }
39.  
40.         ////////////////////////// key press to leftright //////////////////////////////
41.         turnleftright = Input.GetAxis ("Horizontal") * rotatespeed;
42.  
43.  
44.         ////////////////////////// key press to updown ////////////////////////////////
45.         turnupdown = Input.GetAxis ("Vertical") * 100;
46.  
47.         }
48.  
49.     void FixedUpdate () {
50.  
51.         Vector3 down = transform.TransformDirection (Vector3.down);
52.  
53.         rotationx = transform.eulerAngles.x;
54.         rotationy = transform.eulerAngles.y;
55.         rotationz = transform.eulerAngles.z;
56.  
57.         vary = Mathf.Tan (rotationx) * 10;
58.  
59. //        Vector3 test (transform.position.x, vary, transform.ImagePosition.z);
60.  
61.         // checks if its to low to the ground, and then makes it hover
62.         if(Physics.Raycast(transform.position, down, 1)){
63.             rigidbody.AddForce(transform.up * hover);
64.         }
65.  
66.         // move it
67.         rigidbody.AddRelativeForce (transform.position.x * 2.0f, vary, transform.position.z);
68.  
69.         // rotate object
70.         rigidbody.AddTorque(transform.up * turnleftright);
71.  
72.         // rotate up down
73.         transform.Rotate (new Vector3 (turnupdown, 0, 0) * Time.deltaTime);
74.  
75.  
76.         /////////////////////////////////////////////////////////////////////////////////
77.  
78.     }
79. }

But it seems that i cant get a smooth flying speeder. I am trying to use the angle of ratotation with some basic giometrie to figure out the force for Y. but it doesn't seem to work properly.

Can you guys help this starting designer out?

P.S. i want to use the physics engine, thats why i use AddForce

 

Code (csharp):

1.  
2.        rigidbody.AddRelativeForce (transform.position.x * 2.0f, vary, transform.position.z);
3.  

Here's one issue, probably your biggest one. Why would you add the position as force?

What controls the "translation" movement? That's what you want to feed that function, not your current position.

 

I see you chose AddRelativeForce. What s the advantage of that function over plain AddForce?

With "translation" do you mean the function transform.translate or what creates the value for x? Incase of the latter it shoudl also be deduced from the angle of the object.

 

I wasn't making a recommendation, I was simply quoting your code to point out where the problem is.

So, it's always going to move forward? Try something like this:

Code (csharp):

1.  
2. rigidbody.AddRelativeForce(0f, 0f, 1f);
3.  

 

Thanks for the clarification. You got me thinking and i think i made a step forward. thanks.

The idea is that you keep moving forward (might implement a variable later to controll the forward force) but if you tilt the nose up, you will start flying forward and up. if you start turning to the left you will go left, and stil up if the nose is still up. If the nose is down, you go down, if you turn right you start going right