I need little help to modify slider script

I created one slider and transformed to HP bar, but i need to modify my script.
I would like to get it off when I press a button (UI) and once he arrives at 0 scene change.
Someone could help me?
Thank you in advance

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5.  
6. public class hp : MonoBehaviour {
7.    
8.     public Slider BarraHp;
9.     public int Hp = 100;
10.    
11.  
12.     // Use this for initialization
13.     void Start () {
14.        
15.     }
16.    
17.     void OnTriggerEnter (Collider other) {
18.         if (other.gameObject.tag == "sotto5HP") {
19.             Hp = Hp - 5;
20.         }
21.     }
22.    
23.     // Update is called once per frame
24.     public void Update () {
25.        
26.         BarraHp.value = Hp;
27.        
28.        
29.     }
30. }

 

I'll be honest, not sure what you are asking. What do you mean by get it off and 0 scene change?

Also, just as a note, no reason to update BarraHp.value in Update. Just update the value after you subtract the Hp in the OnTriggerEnter. That way you change the value once instead of trying to change it every frame, even when you haven't taken any damage.

 

My best guess:

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3.  
4. // Include to use scene manager functions (for loading scenes).
5. using UnityEngine.SceneManagement;
6.  
7. public class HP : MonoBehaviour
8. {
9.     public Slider barraHp;
10.     public int hp = 100;
11.  
12.     private void OnTriggerEnter(Collider other)
13.     {
14.         // Use CompareTag for comparing tags. It's better for performance.
15.         if (other.gameObject.CompareTag("sotto5HP"))
16.         {
17.             hp -= 5;
18.             barraHp.value = hp;
19.  
20.             // Load new scene if hp reaches 0.
21.             if (hp <= 0)
22.             {
23.                 // Put the index of the scene you want to load here. The index is shown in File -> Build Settings.
24.                 // You can also put the scene name here as: SceneManager.LoadScene("GameOver") for example.
25.                 SceneManager.LoadScene(0);
26.             }
27.         }
28.     }
29.  
30.     // Hook this up to the button you want to press. In the inspector, click on your button and go to where it
31.     // shows On Click (list is empty). Click the +, add the object with this HP script on it, and select this
32.     // function. It will then be called when you click the button.
33.     public void OnButtonPress()
34.     {
35.         // I am not sure how you want the slider removed. This disables the entire game object.
36.         // You can also destroy it: Destroy(barraHp.gameObject) or disable the slider itself
37.         // barraHp.enabled = false.
38.         barraHp.gameObject.SetActive(false);
39.     }
40. }

I also included what Brathnann suggested as it is more efficient.

 

the hp range is 0-100 and I wanted when I press the UI button to go down by 5, when it comes to 0 hp it would change scene. Sorry for my bad english, i m italian.

 

OH Grazie Mille Jason

 

To note, this is using OnTriggerEnter, if you want it to happen off a button press, I would suggest you create a different method that you can link to the button in the inspector.

If you also want it to trigger off the player hitting something, you could move the code to another method, but leave the compareTag check and just have it call the other method if it's true.

 

Eh I thought about it too, onclick instead the trigger?
As a function it should only have that pressing the ui button loses life, and that at the end of life it changes scene.
Brathnann, what method would you recommend to me? Thank you