Question Fixed TimeStep and performance

Hi, i have a very fast object and collision and physic werent working properly so after researching best way to make this was reducing fixed timestep. I reduced x10 what would be performance difference

 

/10

 

I did i made rigidbody continuous bit still missed. Maybe i should try raycast. I looked profiler it is twice worse fps. Is there any way for reducing timestep just for collision detection

 

I lowered 0.02 to 0.01 it rarely misses and fps dropped about 20 fps.Is there any way for reducing fixed timestep just for collision detection. can raycast calculate more accurate.

 

There is a bullet bullet has capsule collider it set to collider not trigger it has rigidbody with continuous collision detection i am creating and setting velocity with this code

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class turretFireAnim : MonoBehaviour
6. {
7.  
8.     public GameObject TurretShell;
9.     public GameObject ProjectileLoc;
10.     public GameObject fireExplosion;
11.     float time = 2f;
12.     public TurretRotatiton rotate;
13.     public bool isPlaced;
14.     AudioSource source;
15.     public AudioClip fireSound;
16.     void Start()
17.     {
18.         source = GetComponent<AudioSource>();
19.     }
20.  
21.     // Update is called once per frame
22.     void Update()
23.     {
24.    
25.     }
26.  
27.     public void setCanTurn()
28.     {
29.  
30.  
31.         rotate.canTurn = true;
32.     }
33.     public void Fire()
34.     {
35.         rotate.canTurn = false;
36.         source.PlayOneShot(fireSound,0.1f);
37.         Quaternion targetRotation = Quaternion.LookRotation(rotate.direction.normalized, Vector3.up);
38.  
39.         GameObject Bullet = Instantiate(TurretShell, ProjectileLoc.transform.position, targetRotation);
40.         Instantiate(fireExplosion, ProjectileLoc.transform.position, targetRotation);
41.  
42.         Bullet.GetComponent<Rigidbody>().velocity = rotate.direction.normalized * 2000f;
43.         Bullet.GetComponent<Turret_1_Projectile>().enemy = rotate.Target;
44.  
45.  
46.  
47.  
48.     }
49. }
50.  

and there is a enemy it has rigidbody with continuous detection and it has box collider which set to trigger.When bullet collide with enemy i am destroying it ontriggerenter here is the code

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Turret_1_Projectile : MonoBehaviour
6. {
7.     public GameObject enemy;
8.     public GameObject explosion;
9.  
10.     public Color craterColor = Color.black;
11.     float maxCollapseDepth = 3f;
12.     float time;
13.     float GeneralTime;
14.     float craterSize = 5f;
15.     Rigidbody rig;
16.     float timer = 5f;
17.     Vector3 speed;
18.  
19.     void Start()
20.     {
21.         rig = GetComponent<Rigidbody>();
22.         speed = rig.velocity;
23.     }
24.  
25.     // Update is called once per frame
26.     void Update()
27.     {
28.         timer -= Time.deltaTime;
29.         if(timer<=0f) Destroy(gameObject);
30.       // Guide();
31.     }
32.  
33.  
34.     private void OnTriggerEnter(Collider collision)
35.     {
36.  
37.         if (collision.gameObject.tag=="Enemies")
38.         {
39.        
40.             Destroy(collision.transform.parent.gameObject);
41.             Destroy(gameObject);
42.             Vector3 explosionPosition = collision.transform.position;
43.             Instantiate(explosion, explosionPosition, Quaternion.identity);
44.  
45.             Destroy(collision.transform.parent.gameObject);
46.  
47.        
48.      
49.  
50.      
51.    
52.  
53.  
54.         }
55.      
56.  
57.  
58.  
59.  
60.     }
61.     private void OnCollisionEnter(Collision collision)
62.     {
63.  
64.  
65.         if (collision.gameObject.tag == "hey")
66.         {
67.  
68.             Vector3 incidentDirection = rig.velocity.normalized;
69.             Vector3 reflectionDirection = Vector3.Reflect(incidentDirection, collision.contacts[0].normal);
70.        
71.  
72.             transform.rotation = Quaternion.LookRotation(rig.velocity, Vector3.up);
73.             rig.velocity = speed.magnitude * reflectionDirection;
74.             int layer = LayerMask.NameToLayer("FriendBulletsRico");
75.             gameObject.layer = layer;
76.             // collideTerrain(collision);
77.  
78.  
79.             return;
80.         }
81.  
82.     }
83.  
84.    
85.  
86.  
87.  
88.     }
89. }
90.  

because of fast movement sometimes bullet goes through enemy

 

Yes, triggers aren't solid and so they can obviously move through other objects. Disable the trigger and use OnCollisionEnter to detect the collision and destroy enemy.

 

thank you maybe i should refactor my code for collision instead of trigger .I dont think this is an option because. I want the bullet to pierce the enemy, but when 2 colliders collides , it loses its speed. Maybe I can add speed after the collision

 

Good to know! I think this totally worth a mention in the manual when describing the continuous collision options.