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Sprite not Appearing in Unity 2D Game

I'm creating a 2D Top Down game for practice and I need a little bit of help. For context, it's a 2D Top Down Shooter game, where you can move and shoot enemies. The enemies have a basic radius system where if the player gets within the radius, it'll approach the player.
Now I'm making a game mechanic where the player can hide in a cardboard box, the player can press 'E' and he'll suddenly become a cardboard box, where if the player is in the cardboard box, the enemy doesn't detect him even if the player's within the radius. Yes, just like in Metal Gear. Now I've created the prefabs and everything and functionality-wise, it works perfectly. If you press 'E' the enemy cannot detect you.
Now the small problem is that the cardboard box didn't appear, so it's just the player disappearing entirely. I do not know what caused this problem.
For context, these are my scripts. Feel free to read them, or not :)
PlayerController:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerController : MonoBehaviour
{
public float moveSpeed;
public GameObject bulletPrefab;
public GameObject player;
private Rigidbody2D rb2d;
private Vector2 moveDirection;
[SerializeField] private Camera cam;
[SerializeField] private GameObject gunPoint;
public bool isHiding = false;
[SerializeField] private GameObject cardboardBox;
[SerializeField] private GameObject gunSprite;
// Start is called before the first frame update
void Start()
{
rb2d = GetComponent<Rigidbody2D>();
cardboardBox.SetActive(false); // Hide the cardboard box when the game starts
gunSprite.SetActive(true); // Show the gun sprite when the game starts
}
// Update is called once per frame
void Update()
{
CheckCursor();
ProcessInputs();
// Make the camera follow the player
cam.transform.position = new Vector3(player.transform.position.x, player.transform.position.y, cam.transform.position.z);
// Check if player pressed the "E" key to toggle the cardboard box
if (Input.GetKeyDown(KeyCode.E))
{
isHiding = !isHiding; // Toggle the isHiding variable
cardboardBox.SetActive(isHiding); // Show/hide the cardboard box accordingly
// If player is hiding, stop player movement
if (isHiding)
{
moveDirection = Vector2.zero;
player.GetComponent<SpriteRenderer>().enabled = false;
cardboardBox.GetComponent<SpriteRenderer>().enabled = true;
gunSprite.SetActive(false); // Hide the gun sprite when the player is hiding
}
else
{
player.GetComponent<SpriteRenderer>().enabled = true;
cardboardBox.GetComponent<SpriteRenderer>().enabled = false;
gunSprite.SetActive(true); // Show the gun sprite when the player is not hiding
}
}
}
private void FixedUpdate()
{
if (!isHiding) // Only allow player to move if they are not hiding in the cardboard box
{
Movement();
}
}
private void CheckCursor()
{
Vector3 mousePos = cam.ScreenToWorldPoint(Input.mousePosition);
Vector3 characterPos = transform.position;
if (mousePos.x > characterPos.x)
{
this.transform.rotation = new Quaternion(0, 0, 0, 0);
}
else if (mousePos.x < characterPos.x)
{
this.transform.rotation = new Quaternion(0, 180, 0, 0);
}
}
private void Movement()
{
// TODO : Implementasi movement player
rb2d.velocity = new Vector2(moveDirection.x * moveSpeed, moveDirection.y * moveSpeed);
}
private void ProcessInputs()
{
float moveX = Input.GetAxisRaw("Horizontal");
float moveY = Input.GetAxisRaw("Vertical");
moveDirection = new Vector2(moveX, moveY);
if (Input.GetMouseButtonDown(0))
{
Shoot();
}
}
private void Shoot()
{
Vector3 mousePos = cam.ScreenToWorldPoint(Input.mousePosition);
Vector3 gunPointPos = gunPoint.transform.position;
Vector3 direction = (mousePos - gunPointPos).normalized;
GameObject bullet = Instantiate(bulletPrefab, gunPointPos, Quaternion.identity);
bullet.GetComponent<Bullet>().Init(direction);
}
}
EnemyController script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class EnemyController : MonoBehaviour
{
public Transform player;
public float moveSpeed = 5f;
public float detectionRadius = 5f;
public int maxHealth = 1;
private int currentHealth;
private Rigidbody2D rb2d;
private Vector2 movement;
private void Start()
{
rb2d = this.GetComponent<Rigidbody2D>();
currentHealth = maxHealth;
}
private void Update()
{
float distanceToPlayer = Vector2.Distance(transform.position, player.position);
if (player != null && distanceToPlayer <= detectionRadius && !player.GetComponent<PlayerController>().isHiding)
{
Vector3 direction = player.position - transform.position;
float angle = Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg;
rb2d.rotation = angle;
direction.Normalize();
movement = direction;
}
else
{
movement = Vector2.zero;
}
}
void FixedUpdate()
{
moveCharacter(movement);
}
private void moveCharacter(Vector2 direction)
{
rb2d.MovePosition((Vector2)transform.position + (direction * moveSpeed * Time.deltaTime));
}
public void DestroyEnemy()
{
Destroy(gameObject);
}
}
Bullet script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Bullet : MonoBehaviour
{
// Start is called before the first frame update
[SerializeField] private float speed;
[SerializeField] private Vector3 direction;
public void Init(Vector3 direction)
{
this.direction = direction;
this.transform.SetParent(null);
transform.rotation = Quaternion.Euler(0, 0, Mathf.Atan2(direction.y, direction.x) * Mathf.Rad2Deg);
}
// Update is called once per frame
void Update()
{
this.transform.position += transform.right * speed * Time.deltaTime;
}
// TODO : Implementasi behaviour bullet jika mengenai wall atau enemy
private void OnTriggerEnter2D(Collider2D other)
{
switch(other.gameObject.tag)
{
case "Wall":
Destroy(gameObject);
break;
case "Enemy":
Destroy(gameObject);
other.gameObject.GetComponent<EnemyController>().DestroyEnemy();
break;
}
}
}
I've tried tinkering my scripts, I've tried checking if there are any missing components in the cardboard box game object but to no avail. Although I might be wrong on the Unity part since I'm fairly certain that the script isn't the problem here, again might be wrong.
I appreciate all the help I can get, thank you for reading until here

System Inputs - How to make my game object jump?

I'm making a simple platformer with a rolling ball that rolls around and collects coins to win each level. I'm using Unity's System input from Unity's package manager to help me with controls and key binding and have successfully gotten my ball to roll around with ease and collect coins with a nice UI setup. However, I would like to implement harder levels where the ball jumps. I can not figure out how to make the ball jump. I know there are others ways to go about this but I just can't figure out how to make it work in the system inputs.
(I know an if statement is needed to test if the ball is grounded however again I'm new and still learning)
Gameplay | OnJump in player input is for jumping | KeyBindings
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.InputSystem;
using TMPro;
public class PlayerController: MonoBehaviour
{
public float speed = 0;
public bool isGrounded;
public float jumpForce;
public TextMeshProUGUI countText;
public GameObject winTextObject;
private Rigidbody rb;
private int count;
private float movementX;
private float movementY;
// Start is called before the first frame update
void Start()
{
rb = GetComponent<Rigidbody>();
SetCountText();
winTextObject.SetActive(false);
}
private void OnMove(InputValue movementValue)
{
Vector2 movementVector = movementValue.Get<Vector2>();
movementX = movementVector.x;
movementY = movementVector.y;
}
private void onJump(InputValue value)
{
}
void SetCountText()
{
countText.text = "Count: " + count.ToString();
if(count >= 12)
{
winTextObject.SetActive(true);
}
}
private void FixedUpdate()
{
Vector3 movement = new Vector3(movementX, 0.0f, movementY);
rb.AddForce(movement * speed);
}
private void OnTriggerEnter(Collider other)
{
if(other.gameObject.CompareTag("PickUp"))
{
other.gameObject.SetActive(false);
count = count + 1;
SetCountText();
}
}
}

Make sure you create a new tag called Ground and put it on everything you want your player to be able to jump on (the ground).
public float jumpHeight = 5f;
public bool isGrounded;
void Update()
{
if (isGrounded)//Checks if is on ground
{
if (Input.GetButtonDown("Jump"))//If the space is pressed
{
rb.AddForce(Vector3.up * jumpHeight)
}
}
}
void OnCollisionEnter(Collision other)//If touch other object
{
if (other.gameObject.tag == "Ground")//If other object has Ground tag
{
isGrounded = true;
}
}
void OnCollisionExit(Collision other)
{
if (other.gameObject.tag == "Ground")
{
isGrounded = false;
}
}
You can also do if (Input.GetButtonDown("Jump")) as
if (Input.GetKeyDown("space"))
or
if (Input.GetKeyDown(KeyCode.Space))

Firing Projectiles in Unity

Im trying to build a weapon in a game using Unity. My bullets spawn but i cant seem to get the force to apply on instantiation to get them to actually fire.
My weapon script
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Weapon : MonoBehaviour {
public Rigidbody2D projectile;
public float forceMultiplier;
public Vector2 direction;
public Transform firePoint;
private float timeBtwShots;
public float startTimeBtwShots;
public void Fire(float force, Vector2 direction)
{
Instantiate(projectile, firePoint.position, transform.rotation);
projectile.AddForce(direction * force);
}
// Update is called once per frame
void Update () {
if (timeBtwShots <= 0)
{
if (Input.GetKeyDown(KeyCode.Return))
{
Fire(forceMultiplier, direction);
timeBtwShots = startTimeBtwShots;
}
}
else
{
timeBtwShots -= Time.deltaTime;
}
}
}

You need to add the force to the spawned object and not the prefab.
Your code should be something like this:
public void Fire(float force, Vector2 direction)
{
Rigidbody2D proj = Instantiate(projectile, firePoint.position, transform.rotation);
proj.AddForce(direction * force);
}

Transform instantiated bullet towards camera center

I have made a very simple gun script, currently the bullet transform in the same direction as the GameObject i have set as the bullet spawn position. but i want the bullet to transform towards the center of the camera, i have a couple of different ideas. The 1st one is shooting a raycast when the raycast hit something transform the bullet form bulletpos to raycasthit position. But i dont quite know how to do this, can anyone help me?
Here is my script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Gun : MonoBehaviour {
public Transform bulletCapTransform;
public GameObject bulletCap;
public float ammo;
public float magAmmo;
public GameObject shootEffect;
public Transform bulletTransform;
public GameObject bullet;
public float bulletForce;
public GameObject crossHair;
public float fireRate = 0.3333f;
private float timeStamp;
Animator anim;
// Use this for initialization
void Start ()
{
anim = gameObject.GetComponent<Animator>();
}
// Update is called once per frame
void Update ()
{
Shoot();
Aim();
}
public void OnGUI()
{
GUI.Box(new Rect(10, 10, 50, 25), magAmmo + " / " + ammo);
}
public void Shoot()
{
if(Time.time >= timeStamp && Input.GetButton("Fire1") && magAmmo > 0)
{
GameObject bulletCapInstance;
bulletCapInstance = Instantiate(bulletCap, bulletCapTransform.transform.position, bulletCapTransform.rotation) as GameObject;
bulletCapInstance.GetComponent<Rigidbody>().AddForce(bulletCapTransform.right *10000);
GameObject bulletInstance;
bulletInstance = Instantiate(bullet, bulletTransform) as GameObject;
bulletInstance.GetComponent<Rigidbody>().AddForce(bulletTransform.forward * bulletForce);
Instantiate(shootEffect, bulletTransform);
timeStamp = Time.time + fireRate;
magAmmo = magAmmo -1;
}
if(Input.GetKeyDown(KeyCode.R))
{
//This is just for testing
magAmmo = magAmmo + 10;
}
}
void Aim()
{
if(Input.GetButton("Fire2"))
{
anim.SetBool("Aiming", true);
crossHair.SetActive(false);
}
else
{
anim.SetBool("Aiming", false);
crossHair.SetActive(true);
}
}
}

So i think you want to fire a projectile from a "gun" object towards whatever is at the centre of your screen (regardless of central objects distance)
This script is working for me and shoots dead into the centre of the view.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Gun : MonoBehaviour
{
public Transform bulletCapTransform;
public GameObject bulletCap;
public float ammo;
public float magAmmo;
public GameObject shootEffect;
public Transform bulletTransform;
public GameObject bullet;
public float bulletForce;
public GameObject crossHair;
public float fireRate = 0.3333f;
private float timeStamp;
Animator anim;
// Use this for initialization
void Start()
{
anim = gameObject.GetComponent<Animator>();
}
// Update is called once per frame
void Update()
{
Shoot();
Aim();
}
public void OnGUI()
{
GUI.Box(new Rect(10, 10, 50, 25), magAmmo + " / " + ammo);
}
public void Shoot()
{
if (Time.time >= timeStamp && Input.GetButton("Fire1") && magAmmo > 0)
{
Debug.Log("shoot");
GameObject bulletCapInstance;
bulletCapInstance = Instantiate(bulletCap, bulletCapTransform.transform.position, bulletCapTransform.rotation) as GameObject;
bulletCapInstance.GetComponent<Rigidbody>().AddForce(bulletCapTransform.right * 10000);
//This will send a raycast straight forward from your camera centre.
Ray ray = Camera.main.ViewportPointToRay(new Vector3(0.5f, 0.5f, 0));
RaycastHit hit;
//check for a hit
if (Physics.Raycast(ray, out hit))
{
// take the point of collision (make sure all objects have a collider)
Vector3 colisionPoint = hit.point;
//Create a vector for the path of the bullet from the 'gun' to the target
Vector3 bulletVector = colisionPoint - bullet.transform.position;
GameObject bulletInstance = Instantiate(bullet, bulletTransform) as GameObject;
//See it on it's way
bulletInstance.GetComponent<Rigidbody>().AddForce(bulletVector * bulletForce);
}
Instantiate(shootEffect, bulletTransform);
timeStamp = Time.time + fireRate;
magAmmo = magAmmo - 1;
}
if (Input.GetKeyDown(KeyCode.R))
{
//This is just for testing
magAmmo = magAmmo + 10;
}
}
void Aim()
{
if (Input.GetButton("Fire2"))
{
anim.SetBool("Aiming", true);
crossHair.SetActive(false);
}
else
{
anim.SetBool("Aiming", false);
crossHair.SetActive(true);
}
}
}
The crucial point to remember is this:
Camera.main.ViewportPointToRay(0.5, 0.5, 0);
Will shoot a raycast dead ahead from the centre of your screen.
It's worth really getting to know raycasting and it's ins and outs. it seems daunting at first but its so useful once you've got it down and it's pretty intuitive. There are a lot of good youtube tutorials.
Hope your game turns out good!

How to make enemies turn and move towards player when near? Unity3D

I am trying to make my enemy object turn and start moving towards my player object when the player comes within a certain vicinity.
For the turning I have been testing the transform.LookAt() function although it isn't returning the desired results as when the player is too close to the enemy object the enemy starts to tilt backwards and I only want my enemy to be able to rotate along the y axis, thanks in advance.
using UnityEngine;
using System.Collections;
public class EnemyController : MonoBehaviour {
public Transform visionPoint;
private PlayerController player;
public Transform Player;
public float visionAngle = 30f;
public float visionDistance = 10f;
public float moveSpeed = 2f;
public float chaseDistance = 3f;
private Vector3? lastKnownPlayerPosition;
// Use this for initialization
void Start () {
player = GameObject.FindObjectOfType<PlayerController> ();
}
// Update is called once per frame
void Update () {
// Not giving the desired results
transform.LookAt(Player);
}
void FixedUpdate () {
}
void Look () {
Vector3 deltaToPlayer = player.transform.position - visionPoint.position;
Vector3 directionToPlayer = deltaToPlayer.normalized;
float dot = Vector3.Dot (transform.forward, directionToPlayer);
if (dot < 0) {
return;
}
float distanceToPlayer = directionToPlayer.magnitude;
if (distanceToPlayer > visionDistance)
{
return;
}
float angle = Vector3.Angle (transform.forward, directionToPlayer);
if(angle > visionAngle)
{
return;
}
RaycastHit hit;
if(Physics.Raycast(transform.position, directionToPlayer, out hit, visionDistance))
{
if (hit.collider.gameObject == player.gameObject)
{
lastKnownPlayerPosition = player.transform.position;
}
}
}
}

change the look at target:
void Update () {
Vector3 lookAt = Player.position;
lookAt.y = transform.position.y;
transform.LookAt(lookAt);
}
this way the look at target will be on the same height as your object.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class EnemyMovement : MonoBehaviour
{
public Transform Player;
public float MoveSpeed = 4;
int MaxDist = 10;
int MinDist = 5;
void Update()
{
transform.LookAt(Player);
if (Vector3.Distance(transform.position, Player.position) >= MinDist)
{
transform.position += transform.forward * MoveSpeed * Time.deltaTime;
if (Vector3.Distance(transform.position, Player.position) <= MaxDist)
{
// Put what do you want to happen here
}
}
}
}