Hi guys, i’ve got a question.
I made a mini “game” just to test some stuff out. I wanted my character to shoot bombs that explode into particles on impact with the ground. But everytime the bomb hits the ground one particle is created and i get the Error message : NullReferenceException: Object reference not set to an instance of an object.
Here my code:
First PlayerControll.cs:
public class PlayerControll : MonoBehaviour
{
public Animator animator;
public Transform trsnGun;
public Transform muzzle;
public float moveSpeed;
public Vector2 groundDispenseVelocity;
public Vector2 verticalDispenseVelocity;
public Rigidbody2D rb;
public GameObject bulletPreFab;
private Vector2 moveDirection;
private Vector2 mousePos;
void FixedUpdate()
{
Move();
ProcessInputs();
RotateGun();
Shoot();
}
void ProcessInputs()
{
float moveX = Input.GetAxisRaw("Horizontal");
float moveY = Input.GetAxisRaw("Vertical");
moveDirection = new Vector2(moveX, moveY).normalized;
if (moveDirection != Vector2.zero)
{
animator.SetFloat("Horizontal", moveX);
}
animator.SetFloat("Speed", moveDirection.sqrMagnitude);
}
void Move()
{
rb.velocity = new Vector2(moveDirection.x * moveSpeed, moveDirection.y * moveSpeed);
}
void RotateGun()
{
mousePos = Input.mousePosition;
Vector3 objectPos = Camera.main.WorldToScreenPoint(trsnGun.position);
mousePos.x = mousePos.x - objectPos.x;
mousePos.y = mousePos.y - objectPos.y;
float angle = Mathf.Atan2(mousePos.y, mousePos.x) * Mathf.Rad2Deg;
trsnGun.rotation = Quaternion.Euler(0f, 0f, angle);
if (angle < -90 || angle > 90)
{
if (trsnGun.eulerAngles.y == 0)
{
trsnGun.localRotation = Quaternion.Euler(180, 0, -angle);
}
else if (trsnGun.eulerAngles.y == 180)
{
trsnGun.localRotation = Quaternion.Euler(180, 180, -angle);
}
}
}
void Shoot()
{
if (Input.GetMouseButtonDown(0))
{
GameObject tempFab = Instantiate(bulletPreFab, muzzle.position, Quaternion.identity);
tempFab.GetComponent<FakeHeight>().Initialize(trsnGun.right * Random.Range(groundDispenseVelocity.x, groundDispenseVelocity.y), Random.Range(verticalDispenseVelocity.x , verticalDispenseVelocity.y));
}
}
}
Second one FakeHeight.cs:
public class FakeHeight : MonoBehaviour
{
public UnityEvent groundHitEvent;
public GameObject bullet;
public Transform trnsObject;
public Transform trnsBody;
public Transform trnsShadow;
public Vector2 groundVelocity;
public float verticalVelocity;
public float gravity = -10;
public bool isGrounded;
// Update is called once per frame
private void FixedUpdate()
{
UpdatePosition();
CheckTouchdown();
}
public void Initialize(Vector2 groundVelocity, float verticalVelocity)
{
this.groundVelocity = groundVelocity;
this.verticalVelocity = verticalVelocity;
}
void UpdatePosition()
{
if (!isGrounded)
{
verticalVelocity += gravity * Time.deltaTime;
trnsBody.position += new Vector3(0, verticalVelocity, 0) * Time.deltaTime;
}
trnsObject.position += (Vector3)groundVelocity * Time.deltaTime;
}
void CheckTouchdown()
{
if (trnsBody.position.y < trnsObject.position.y && !isGrounded)
{
isGrounded = true;
trnsBody.position = trnsObject.position;
GroundHit();
}
}
void GroundHit()
{
groundHitEvent.Invoke();
}
public void Remove()
{
Destroy(bullet);
}
}
and the last one with the error DebrisDispenser.cs:
public class DebrisDispenser : MonoBehaviour
{
public GameObject debrisParticle;
public Vector2 debrisGroundVelocityRange;
public Vector2 debrisVerticalVelocityRange;
public Vector2 debrisParticleSizeRange;
public Vector2Int debrisAmountRange;
public void DispenseDebris()
{
int debrisAmount = Random.Range(debrisAmountRange.x, debrisAmountRange.y);
for (int i = 0; i < debrisAmount; i++)
{
GameObject particle = Instantiate(debrisParticle, transform.position, Quaternion.identity);
if (particle != null)
{
particle.transform.localScale = Vector3.one * Random.Range(debrisParticleSizeRange.x, debrisParticleSizeRange.y); // <-- works fine here
particle.GetComponent<FakeHeight>().Initialize(Random.insideUnitCircle * Random.Range(debrisGroundVelocityRange.x, debrisGroundVelocityRange.y), Random.Range(debrisVerticalVelocityRange.x, debrisVerticalVelocityRange.y)); // NullReferenceException
}
}
}
}
I have watched some videos and read some posts about this Error but i just can’t fix it. Maybe some of you can help. Thanks in advance.
