c# Weapon Pickup Script

Question

Hello :) I am fairly new to Unity and i am trying to make a FPS. Currently, I am working on making the player able to pick up weapon off the floor, so far I have got it so the player can look at the object and press 'F' to make it disappear (just as a test, don't know if i need this) but I would like to make it so the player can pick up the weapon and add it to their inventory but I would like it so they can only hold two weapons at once and can switch between them. I am not sure what to do from here, any help (preferably in c#) would be appreciated. Thank You! In advance. :)

This is my code so far:

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class WeaponPickup : MonoBehaviour { public GameObject playerCamera; //this is a reference to the main camera (drag & drop) public GameObject weapon;

 // Update is called once per frame
 void Update()
 {
     RaycastHit hitInfo; //a structure to hold hit information (gameobject we hit, position of the "impact" etc.)
     Ray r = new Ray(playerCamera.transform.position, playerCamera.transform.forward); //A ray starting from the camera, going forward

     //if we hit something
     if (Physics.Raycast(r, out hitInfo))
     {
         //if it is tagged as a weapon
         if (hitInfo.transform.CompareTag("Weapon"))
         {
             //if the user presses F
             if (Input.GetKeyDown(KeyCode.F))
             {
                 Debug.Log("Hi");
                 Destroy(weapon);
             }
         }
     }
 }

}

Answer 1

Hi @Oliver08 - You are on the right way. Here is an example that can help you on the way.

 public class PickupManager {
 
     public Transform cameraTransform;
     public KeyCode pickupKey = KeyCode.F;
     public KeyCode dropKey = KeyCode.G;
     string weaponTag = "Weapon";
 
     public List<GameObject> weapons;
     public int maxWeapons = 2;
 
     // this variable represent the weapon you carry in your hand 
     public GameObject currentWeapon;
 
     // this variable represent your hand which you set as the parent of your currentWeapon
     public Transform hand;
 
     // Insert a gameobject which you drop inside your player gameobject and position it where you want to drop items from
     // to avoid dropping items inside your player
     public Transform dropPoint;
 
     void Update() {
 
         // SELECT WEAPONS
         if (Input.GetKeyDown(KeyCode.Alpha1)) {
             SelectWeapon(0);
         }
 
         if (Input.GetKeyDown(KeyCode.Alpha2)) {
             SelectWeapon(1);
         }
 
         // PICKUP WEAPONS
         RaycastHit hit;
         Ray ray = new Ray(cameraTransform.position, cameraTransform.forward);
 
         if (Physics.Raycast(ray, out hit)) {
             if (hit.transform.CompareTag(weaponTag) && Input.GetKeyDown(pickupKey) && weapons.Count < maxWeapons) {
                 
                 // save the weapon                
                 weapons.Add(hit.collider.gameObject);
             
                 // hides the weapon because it's now in our 'inventory'
                 hit.collider.gameObject.SetActive(false);
 
                 // now we can positioning the weapon at many other places.
                 // but for this demonstration where we just want to show a weapon
                 // in our hand at some point we do it now.
                 hit.transform.parent = hand;
                 hit.transform.position = Vector3.zero;
             }
         }
 
         // DROP WEAPONS
         // So let's say you wanted to add a feature where you wanted to drop the weapon you carry in your hand
         if (Input.GetKeyDown(dropKey) && currentWeapon != null) {
 
             // First ensure we remove our hand as parent for the weapon
             currentWeapon.transform.parent = null;
 
             // Move the weapon to the drop position
             currentWeapon.transform.position = dropPoint.position;
 
             // Remove it from our 'inventory'            
             var weaponInstanceId = currentWeapon.GetInstanceID();
             for (int i = 0; i < weapons.Count; i++) {
                 if (weapons[i].GetInstanceID() == weaponInstanceId) {
                     weapons.RemoveAt(i);
                     break;
                 }
             }
 
             // Remove it from our 'hand'
             currentWeapon = null;
         }
     }
 
     void SelectWeapon(int index) {
 
         // Ensure we have a weapon in the wanted 'slot'
         if (weapons.Count > index && weapons[index] != null) {                    
 
             // Check if we already is carrying a weapon
             if (currentWeapon != null) {
                 // hide the weapon                
                 currentWeapon.gameObject.SetActive(false);
             }
 
             // Add our new weapon
             currentWeapon = weapons[index];
 
             // Show our new weapon
             currentWeapon.SetActive(true);            
         }
     }
 }

Now in order to add different settings to each weapon, you could add a weapon script to your weapons and use that to store stuff like firerate, maxbullets etc. and then store a reference to the weapon script on weapons you pick up instead of the gameobject.

c# Weapon Pickup Script

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