Creating a weapon script. Need Help / advice.

Question

I am trying to create a more advance weaponScript. I haven't gotten far at all yet because I am running into a problem "use of unassigned variable" I understand what this means, but I thought it would work be cause the variable "hit" I declared as a RaycastHit. Idk I am doing something wrong though, I know that. So please take a look at the script and tell me what the problems are with it. Also if there is any criticism on how I am going about any part please let me know. I want to do things the cleanest and most efficient way possible.

 using UnityEngine;
 using System.Collections;
 
 
 
 public class weaponScript : MonoBehaviour
 {
     //Clips And Ammo
     public int currentAmmo;
     public int clipCapacity;
     public int numberOfClips;
 
     //Fire Rate(Add burst)
     public float fireRate;
     public float fireTime;
     public float nextFireTime;
 
     //FX
     public  GameObject hitStaticFX;
     public GameObject hitPlayerFX;
     public GameObject bulletHole;
     
     //Functionality.
     public int damage;
 
    
     void Update()
     {
         //If we try to fire and we are able to
         if (Input.GetMouseButton(0) && Time.time >= nextFireTime)
         {
             //Tell us we can fire.
             Debug.Log("Fire Ready");
             
             //Declare a ray, And the ray hitpoint.
             Ray ray = Camera.main.ViewportPointToRay(new Vector3(0.5f, 0.5f, 0));
             RaycastHit hit;
 
             //if the hit GO's tag is...
             switch (hit.transform.tag)
             {
                 case "bullet":
                     // do nothing if 2 bullets collide
                     break;
 
                 case "Player":
                     // add blood effect
                     Instantiate(hitPlayerFX, hit.point, Quaternion.FromToRotation(Vector3.forward, hit.normal));
                     break;
 
                 case "Static":
                     // add wood impact effects
                     //Can use this to add a decal where the "projectile" hits.
                     Instantiate(hitStaticFX, hit.point, Quaternion.FromToRotation(Vector3.forward, hit.normal));
                     break;
                 
                 case "ground":
                     // add dirt or ground  impact effect
                     break;
                 
                 default: // default impact effect and bullet hole
                     Instantiate(hitStaticFX, hit.point + 0.1f * hit.normal, Quaternion.FromToRotation(Vector3.up, hit.normal));
                     GameObject newBulletHole = Instantiate(bulletHole, hit.point, Quaternion.FromToRotation(Vector3.up, hit.normal)) as GameObject;
                     newBulletHole.transform.parent = hit.transform;
                     break;
             }
 
             //Add time to next fire.
             nextFireTime = Time.time + fireRate;
         }
     }
 }

Answer 1

Best Answer

Answer by Leuthil · Mar 31, 2014 at 06:22 PM

You have to actually do a Raycast, which is nowhere in your code :).

This example from the Unity Docs is probably useful to you:

 using UnityEngine;
 using System.Collections;
 
 public class Example : MonoBehaviour {
     void Update() {
         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
         RaycastHit hit; // Here hit is still not assigned
         if (Physics.Raycast(ray, out hit, 100))
             // The Physics.Raycast() function has now assigned 'hit', so you can use it now!
             Debug.DrawLine(ray.origin, hit.point);
     }
 }

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