IDamageable could not be found?

Code (CSharp):

1. using UnityEngine;
2.  
3. public interface IDamageable
4. {
5.  
6.     void TakeHit(float damage, RaycastHit hit);
7.  
8. }

Hey guys, following tutorial and I needed to use IDamageable. Came up as not being found

Class 1

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class Projectile : MonoBehaviour
5. {
6.  
7.     public LayerMask collisionMask;
8.     float speed = 10;
9.     float damage = 1;
10.  
11.     public void SetSpeed(float newSpeed)
12.     {
13.         speed = newSpeed;
14.     }
15.  
16.     void Update()
17.     {
18.         float moveDistance = speed * Time.deltaTime;
19.         CheckCollisions(moveDistance);
20.         transform.Translate(Vector3.forward * moveDistance);
21.     }
22.  
23.  
24.     void CheckCollisions(float moveDistance)
25.     {
26.         Ray ray = new Ray(transform.position, transform.forward);
27.         RaycastHit hit;
28.  
29.         if (Physics.Raycast(ray, out hit, moveDistance, collisionMask, QueryTriggerInteraction.Collide))
30.         {
31.             OnHitObject(hit);
32.         }
33.     }
34.  
35.     void OnHitObject(RaycastHit hit)
36.     {
37.         IDamageable damageableObject = hit.collider.GetComponent<IDamageable>();
38.         if (damageableObject != null)
39.         {
40.             damageableObject.TakeHit(damage, hit);
41.         }
42.         GameObject.Destroy(gameObject);
43.     }
44. }

 

ok, silly question to start: is the interface script saved in the project somewhere?

 

An even sillyer anwser, how would I know if it is saved ?

 

When you noted not being found, is it a compile or runtime error?

If compile, check that your IDamageable is indeed saved in your project as @LeftyRighty suggested. If still not found, closing and reopening MonoDevelop sometimes helped me with the issue.

If you can't find IDamageable with GetComponent<IDamageable>(), make sure you are using Unity 5+ since previous versions do not fetch interfaces with that function because of the "where T : Component". In previous versions you had to get interfaces using the snippet provided in https://www.reddit.com/r/Unity3D/comments/34spf6/implementing_getinterface_extension_on_objects/

Or alternatively you can use typeof(T) approach:

Code (CSharp):

1. IDamageable dmg = gameObject.GetComponent(typeof(IDamageable));

Hope this helps!

 

Hey mate, I want to thank you very much for taking time out of your day to help me. You have helped me out so much, thanks for putting so much detail and describing how to fix the problem.

Thanks so much!