Game Object Incorrect Asymmetric Movement

Hello, everyone! I am currently working in the framework of the Space Shooter Tutorial and I am trying to make a boss-fight at the very end of the game. The boss is supposed to appear at the top of the screen, slowly go down to the upper-center and then start moving from right to left, and then left to right (the pattern is an endless loop). The script I am using is kind of working, but the boss does not make a full circle, but only around 80% of it, which bugs me a lot. It does move to the left, but does not move to the right to a full extent. Could someone tell me whether it is an issue with the following script? Thank you so much in advance!

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class BossMovementScript : MonoBehaviour {
6.     public float speed = 20f;
7.     public Rigidbody rb;
8.        
9.     void Start ()
10.     {
11.         rb = GetComponent<Rigidbody>();
12.         Invoke("InitialBossMove", 3);
13.         InvokeRepeating("BossMove", 6, 4);
14.     }
15.    
16.     void InitialBossMove ()
17.     {
18.         rb.AddForce(transform.right * speed);
19.         speed = speed * 2f;
20.     }
21.    
22.     void BossMove ()
23.     {
24.         speed = speed * -1f;
25.         rb.AddForce(transform.right * speed);
26.     }
27. }
28.  

 

Your InitialBossMove and BossMove methods aren't called every frame, so they don't apply a constant force to the boss' rigidbody. That can make it a little difficult to control, since you would then need to apply a very large force for a single frame; that can lead to inaccuracies. You might want to control the boss' movement in FixedUpdate instead.

Code (csharp):

1. private bool waitDone = false;
2.  
3. void Start()
4. {
5.     rb = GetComponent<Rigidbody>();
6.     Invoke("InitialBossMove", 3);
7.     InvokeRepeating("BossMove", 6, 4);
8. }
9.  
10. void FixedUpdate()
11. {
12.     if(waitDone)
13.         rb.AddForce(transform.right * speed);
14. }
15.  
16. void InitialBossMove ()
17. {
18.     waitDone = true;
19.     speed = speed * 2f;
20. }
21.    
22. void BossMove ()
23. {
24.     speed = speed * -1f;
25. }

Note that you'll want a much smaller "speed" value.

 

Thank you so much!

Thanks a lot! It did make movement much smoother The problem was also alleviated when I played around a bit with the waiting/looping time.