In World Scale AR, I want to move to an object I placed using SpawnOnMap. When I touch that object, I want that object to be erased. I made the Player have a script called PlayerController. I made a tag for the object so that when it touches, it should destroy or set it active. When I walk towards the object, nothing happens. I've tried OnTriggerEnter and OnCollisionEnter already. Is there some kind of method I'm missing that Mapbox provides?
public class PelletCollector : MonoBehaviour
{
public int count = 0;
// Start is called before the first frame update
void Start()
{
}
private void OnCollisionEnter(Collision other)
{
if (other.gameObject.tag == "Pellet")
{
count++;
Debug.Log("Collected Pellets: " + count);
other.gameObject.SetActive(false);
//Destroy(other.gameObject);
}
}
}
Related
I am a beginner in Unity and I am currently making a simple game. I have a problem where the instantiated Button is not destroyed.
The process of the script is to instantiate a button and destroy it upon collision exit. But when I move out of the object, the object stays and it is not destroyed. i don't know if there is something wrong with the Destroy code of line.
Here is the script for the collision:
using UnityEngine;
using UnityEngine.UI;
public class InteractButtonPosition : MonoBehaviour
{
public Button UI;
private Button uiUse;
private Vector3 offset = new Vector3(0, 0.5f, 0);
// Start is called before the first frame update
void Start()
{
//uiUse = Instantiate(UI, FindObjectOfType<Canvas>().transform).GetComponent<Button>();
}
// Update is called once per frame
void Update()
{
//uiUse.transform.position = Camera.main.WorldToScreenPoint(this.transform.position + offset);
}
private void OnCollisionEnter(Collision collisionInfo)
{
if(collisionInfo.collider.name == "Player")
{
uiUse = Instantiate(UI, FindObjectOfType<Canvas>().transform).GetComponent<Button>();
uiUse.gameObject.SetActive(true);
uiUse.transform.position = Camera.main.WorldToScreenPoint(this.transform.position + offset);
}
}
private void OnCollisionExit(Collision collisionInfo)
{
if(collisionInfo.collider.name == "Player")
{
Destroy(uiUse);
}
}
}
The code does exactly what you have written, which is destroying uiUse which is a Button component. If you go and inspect your game object in the scene, you will see, that indeed, the button component has been destroyed.
What you want to do is to destroy the GameObject the button component is attached to, like: Destroy(uiUse.gameObject)
I created a transparent cube trigger and I placed it in front of closed doors, so whenever the player walks near the door a message appears saying "this door is locked".
However, I want the message to be gone whenever the player is Not pointing to the door. currently, it shows even when I turn around, the player needs to walk away from the door to make the message disappear.
Here is my code:
public class DoorsTrigger : MonoBehaviour
{
public GameObject partNameText;
private void OnTriggerEnter(Collider other)
{
if (other.CompareTag("Player"))
{
partNameText.SetActive(true);
}
}
private void OnTriggerExit(Collider other)
{
if (other.CompareTag("Player"))
{
partNameText.SetActive(false);
}
}
}
How can I modify it to achieve my goal?
Here is a simple example using Vector3.Angle() to get the direction the player is facing relative to that trigger.
public class DoorsTrigger : MonoBehaviour
{
public GameObject partNameText;
private void OnTriggerEnter(Collider other)
{
if (other.CompareTag("Player"))
{
//Assuming 'other' is the top level gameobject of the player,
// or a child of the player and facing the same direction
Vector3 dir = (this.transform.position - other.gameObject.transform.position);
//Angle will be how far to the left OR right you can look before it doesn't register
float angle = 40f;
if (Vector3.Angle(other.gameObject.transform.forward, dir) < angle) {
partNameText.SetActive(true);
}
}
}
private void OnTriggerExit(Collider other)
{
//Make sure the text is actually showing before trying to disable it again
if (other.CompareTag("Player") && partNameText.activeSelf)
{
partNameText.SetActive(false);
}
}
}
Alternatively, you can keep your trigger mostly as is, and do a ray cast from the player to see if they are looking at the door.
//Put this snippet in a function and call it inside the player's Update() loop
RaycastHit hit;
Ray ray = new Ray(this.transform.position, this.transform.forward);
if(Physics.Raycast(ray, out hit))
{
//Tag the gameObject the trigger is on with "Door"
if(hit.collider.isTrigger && hit.collider.CompareTag("Door"))
{
//Here is where you would call a function on the door trigger to activate the text.
// Or better would be to just have that code be on the player.
// That way you can avoid unnecessary calls to another gameObject just for a UI element!
}
}
I added a particle system to my unity project. But I can't make it attach to a certain game object or tag. How can I make a Particle System sit on the center of a cube, while it's getting played once if the player triggers with this cube?
Code used for the trigger to work:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Collision_Player_grower : MonoBehaviour
{
public GameObject Player_grower;
public ParticleSystem CollisionGrower;
// Start is called before the first frame update
void Start()
{
times_player_grower = 0;
CollisionGrower.transform.position = Player_grower.transform.position;
}
// Update is called once per frame
void OnTriggerEnter(Collider collision)
{
if (collision.gameObject.tag == "Player")
{
print("we hit an playergrower");
CollisionGrower.Play();
Destroy(Player_grower);
}
}
}
Note: It does work if I manually place the particle system in the heart of the cube, but I assume this can be done in an easier way.
From what I understand, you want the position of the particle system to be in the center of another object.
1)
You could do that simply by attaching a particle system game object as a child of the cube you were talking about.
2)
You could do this with code instead. In case you want the particle system to do something extra, you could just adjust the code.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Collision_Player_grower : MonoBehaviour
{
public GameObject ParticleSystemObject;
public GameObject Cube;
public GameObject Player_grower;
public ParticleSystem CollisionGrower;
// Start is called before the first frame update
void Start()
{
times_player_grower = 0;
CollisionGrower.transform.position = Player_grower.transform.position;
}
// Update is called once per frame
void Update()
{
ParticleSystemObject.transform.position = Cube.transform.position;
}
void OnTriggerEnter(Collider collision)
{
if (collision.gameObject.tag == "Player")
{
print("we hit an playergrower");
CollisionGrower.Play();
Destroy(Player_grower);
}
}
}
I don’t fully understand what the rest of the variables are for, and what they are, so I may have done some un-needed things.
First, I added two GameObject variables. One of them is the cube object you want the particle system to go to, and the other is the particle system as a game object. I set the position of the particle system to the position of the cube.
Important: if you have this script attached to the cube, remove the Cube variable.
Instead of using
... = Cube.transform.position;
Use
... = transform.position;
I wanted to create an collider on my players sword, that if he attacks that he would detect and via an animation event turn off/on an gameobject called (Damage Point) who was an script attached that would subtract the enemys health.
But somewhere it does not detect correctly. I tried to add the OnDrawGizmos function to see my sphere collider but even after making it bigger it does not detect.
The most strange thing about my issue is that im using the same code for my monster chest and my fantasy player, but for the chest it works but for the player it does not.
I created a class called PlayerDamage that is attached on an empty gameobject to the tip of my sword.
{
public class PlayerDamage : MonoBehaviour
public int damageAmount = 2;
public LayerMask enemyLayer;
void Update()
{
Collider[] hits = Physics.OverlapSphere(transform.position, 1.7f, enemyLayer);
if (hits.Length > 0)
{
if (hits[0].gameObject.tag == MyTags.ENEMY_TAG)
{
print("COLLIDED WITH ENEMY");
}
}
}
private void OnDrawGizmos()
{
Gizmos.DrawWireSphere(transform.position, 1.7f);
}
In another script called PlayerScript that is attached directly to the player I have a function called Attack:
void Attack()
{
if (Input.GetKeyDown(KeyCode.K))
{
if (!anim.GetCurrentAnimatorStateInfo(0).IsName(MyTags.ATTACK_ANIMATION) || !anim.GetCurrentAnimatorStateInfo(0).IsName(MyTags.RUN_ATTACK_ANIMATION))
{
anim.SetTrigger(MyTags.ATTACK_TRIGGER);
}
}
}
Also in the PlayerScript class there are two functions called ActivateDamagePoint and DeactivateDamagePoint, these are assigned to animation events for the attack animations.
void ActivateDamagePoint()
{
damagePoint.SetActive(true);
}
void DeactivateDamagePoint()
{
damagePoint.SetActive(false);
}
I double checked that everything is on his layer and that the tags are okay, but that did not solve my problem.
Like I said before for the chest I use the same code and it works, but unfortunately it does not work with my player. I also have the Activate and Deactivate DamagePoint functions in there and these are also called by the animation event for my chest attack animation.
Okay after 1hour of debugging I finnaly found the solution:
It was in the MyTags class (a helper class for all the string variables), the error was:
public static string ENEMY_TAG = "Enemey";
instead of:
public static string ENEMY_TAG = "Enemy";
I'm a complete unity novice. I want to make a simple scene where you have three lives and you lose a live if you collide with a cube. This is my script:
using UnityEngine;
using UnityEngine.UI;
using System.Collections;
public class Lives : MonoBehaviour {
public Transform player;
public static int lives;
public Image live1;
public Image live2;
public Image live3;
// Use this for initialization
void Start () {
lives = 3;
live1.enabled = true;
live2.enabled = true;
live3.enabled = true;
}
void Update () {
DisplayOfHearts();
}
public static void Damage() {
lives -= 1;
}
public void OnCollisionEnter(Collision col) {
if (col.gameObject.tag == "cube") {
Lives.Damage();
}
}
public void DisplayOfHearts() {
if (lives == 2) {
live3.enabled = false;
}
else if (lives == 1) {
live2.enabled = false;
}
else if (lives == 0) {
live1.enabled = false;
}
}
}
What happens is the player can't move through the cube but the amount of lives stays three. Is there something I'm missing?
The problem is you have attached the script to a wrong game object. The script and the collider must be attached to the same game object.
Unity methods inside a MonoBehaviour script (such as OnEnable, Update, FixedUpdate, Awake, Start, OnTriggerEnter, OnCollisionStay, etc..) only work for the game object which the script is attached to.
If you attach the script to another game object don't expect any of those to work. Update only works while that game object is active. OnCollisionEnter only works when a collision occurs on a collider which is attached directly to that game object. (it doesn't even work when a child has the collider instead of the actual game object where script is attached to)