InvalidCastException: Cannot cast from source type to destination type.

Questions & Answers
1

Hello. I’m sorry to be a noob, but I have very little experience in Unity scripting. Can someone please point me in the right direction as to why I’m getting a InvalidCastException error on line 71 of this?

using UnityEngine;
using System.Collections;

public class Shot : MonoBehaviour
{
    public Transform projectilePrefab;
    public Transform projectilePrefab2;
    public float fireRate = 0.5f;
    private float nextFire = 0.0f;
    public float fireRate2 = 0.1f;
    private float nextFire2 = 0.0f;
    private bool shooting = false;
    private bool shooting2 = false;

    // Update is called once per frame
    void Update()
    {
        if (Input.GetButtonDown("Fire1"))
            shooting = true;
        if (Input.GetButtonUp("Fire1"))
            shooting = false;
        if (Input.GetButtonDown("Fire2"))
            shooting2 = true;
        if (Input.GetButtonUp("Fire2"))
            shooting2 = false;

        if (shooting && Time.time > nextFire)
        {
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
            RaycastHit hit;
            if (Physics.Raycast(ray, out hit, 100000.0f) && hit.collider.gameObject.tag != "PlayerShip")
            {
                GameObject projectile = (GameObject)Instantiate(projectilePrefab, transform.position + transform.forward * 8, transform.rotation);
                projectile.transform.LookAt(hit.point);
            }
            else
            {
                GameObject projectile = (GameObject)Instantiate(projectilePrefab, transform.position + transform.forward * 8, transform.rotation);
                projectile.transform.LookAt(ray.GetPoint(300.0f));
            }
            nextFire = Time.time + fireRate;
        }
        if (shooting2 && Time.time > nextFire2)
        {
            Ray ray2 = Camera.main.ScreenPointToRay(Input.mousePosition);
            RaycastHit hit2;
            if (Physics.Raycast(ray2, out hit2, 100000.0f) && hit2.collider.gameObject.tag != "PlayerShip")
            {
                GameObject projectile2 = (GameObject)Instantiate(projectilePrefab2, transform.position + transform.forward * 8, transform.rotation);
                projectile2.transform.LookAt(hit2.point);
            }
            else
            {
                GameObject projectile2 = (GameObject)Instantiate(projectilePrefab2, transform.position + transform.forward * 8, transform.rotation);
                projectile2.transform.LookAt(ray2.GetPoint(300.0f));
            }
            nextFire2 = Time.time + fireRate2;
        }
    }
}

I have searched the manuals and googled the issue for a long time now, but I just can’t figure out why I’m coming on this problem.

Thanks very much.

2

You are trying to cast a Transform into a GameObject. This will not work. Use GameObject instead of Transform in lines 13 & 15.