Question How to calculate time in x/v=t

Hi, how can i calculate time respect to velocity and distance i am using this code but time is unrelated . The problem is Debug.Log("floattimeRaw " + floatTime); is floattimeRaw 468410,6 but Debug.Log("dest " + timePassed); is dest 0,7153126

Code (CSharp):

1.  
2.   public GameObject enemy;
3.     public GameObject explosion;
4.     public bool isParabolics;
5.     public Color craterColor = Color.black;
6.     float maxCollapseDepth = 3f;
7.     float time;
8.     float GeneralTime;
9.     float craterSize = 5f;
10.     Rigidbody rig;
11.     float timer = 100f;
12.     public int damage;
13.     Vector3 speed;
14.     float floatTime;    // divide the 189 to float time for how much time will it take to hit and divide floatTime to 1000;
15.     float verticalSpeed = 600f;
16.     float horizontalSpeed=800f;
17.     float timePassed;
18.     void Start()
19.     {
20.         rig = GetComponent<Rigidbody>();
21.         speed = rig.velocity;
22.         if (isParabolics)
23.         {
24.             Vector3 horizontalDirection = enemy.transform.position - transform.position;
25.             floatTime = horizontalDirection.magnitude / horizontalDirection.normalized.magnitude * horizontalSpeed;
26.             Debug.Log("floattimeRaw " + floatTime);
27.          //   Debug.Log(floatTime);
28.             Vector3 velo = horizontalDirection.normalized * horizontalSpeed;
29.          //   velo.y += verticalSpeed;
30.             rig.velocity = velo ;
31.         }
32.     }
33.     // Update is called once per frame
34.     void Update()
35.     {
36.         if (isParabolics)
37.         {
38.            
39.             // Vector3 speedo = rig.velocity;
40.             timePassed += Time.deltaTime;
41.             // wholeSpeed = verticalSpeed - (((Time.deltaTime / floatTime)) * verticalSpeed);
42.             //  speedo.y -= (((Time.deltaTime  / floatTime)) * verticalSpeed);
43.             //rig.velocity = speedo;
44.         }
45.      
46.             timer -= Time.deltaTime;
47.             if (timer<=0f) Destroy(gameObject);
48.             // Guide();
49.     }
50.     private void OnDestroy()
51.     {
52.             Debug.Log("dest  " + timePassed);
53.     }
54.  
55.     }

 

İ think i found the problem in line 25 i should make it floatTime = horizontalDirection.magnitude / (horizontalDirection.normalized.magnitude * horizontalSpeed); i have wasted 2 hours for this if this is the problem i hate my life

 

As expected, dx/dt gives you instantaneous velocity.

Obviously it is meaningless if dt == 0

The closer dt comes to 0 the more unstable it is, just due to dividing by very small values with single precision values.

Changes in dt (eg, uneven framerates) may also introduce drift / jitter / noise.

If you have the velocity from the rigidbody, use that. It will usually be less noisy.

 

do you mean i should divide by rigidbody velocity even it is same velocity

 

This doesn't make sense. What are you trying to do here?

Physics doesn't change however. Always turn to basic kinematics when in doubt.

 

i fixed the problem the problem was brackets

1. floatTime = horizontalDirection.magnitude / horizontalDirection.normalized.magnitude * horizontalSpeed;
2. floatTime = horizontalDirection.magnitude / (horizontalDirection.normalized.magnitude * horizontalSpeed);