Integrating random values in Unity3d works incorect-CodePudding

I have simple script:

using System.Collections;

using System.Collections.Generic; using UnityEngine;

public class DLATEST : MonoBehaviour { int wx = 0;

 // Start is called before the first frame update
 void Start()
 {
     
 }

 // Update is called once per frame
 void Update()
 {
     wx  = Random.Range(-1, 1);
     
     Debug.Log(wx);
 }

}

but I have weird results: 0 -1 -2 -3 -4 -5 -6 -7 -8

wx is slowly decline to negatives until overflows.

I expect that wx be like near 0 slowly changing around it, but not decline as I have. This is simple numerical integration, but works incorrect.

Also I tried this code:

int wx = 0;
int wxPrev = 0;


 
 // Start is called before the first frame update
 void Start()
 {
     
 }

 // Update is called once per frame
 void Update()
 {
     wx = wxPrev   Random.Range(-1, 1);
     
     Debug.Log(wx);
     wxPred = wx;
 }

Results are the same.

If I debug Random.Range(-1, 1) only then everything is ok, random values are random.

What is wrong in my code? Thank you.

CodePudding user response：

If you use Random.Range(int x, int y) the result will be >= x && < y

In your case Random.Range(-1,1) always returns -1 or 0. You probably needed Random.Range(-1f,1f) - to force using Random.Range(float,float) instead of random int or change to Random.Range(-1,2) so it woult return integer -1, 0 or 1 randomly