Develop Reference

How can I check multiple collider Triggers at once?

I have an aircraft in my game that is controlled by the player. I want it to get destroyed after it collides with something. The aircraft has many colliders on it, so im using an array. Heres my code:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class AircraftDamage : MonoBehaviour
{
public Collider[] Colliders;
public GameObject Aircraft;
private void OnTriggerEnter(Colliders collision)
{
DestroyAircraft();
}
public void DestroyAircraft()
{
Destroy(Aircraft);
}
}
Im getting the obvious error here, type or namespace 'Colliders' could not be found. How can I check if any collider within my array gets triggered?

a better approach is to use OnCollisionEnter instead of OnTriggerEnter

You are missing the basics of Collision here. You don't need to reference the Colliders using an array.
Both OnCollisionEnter and OnTriggerEnter are called when the gameobject to which the script is attached collides with another collider. They return the collider with which it has collided.
So in your case its better to have a single collider on the parent gameobject rather than separate Colliders.
If you really want to have separate colliders for the airplane's body part then you need to add a collision checking script to each of the gameobject or you can add the collision checking script to your obstacles like building and have all your Airplane parts in a single tag.
Check out this guide on Unity collision

i need my player in unity to teleport to a certain location when he touches a tagged object

I need my player to teleport somewhere when he bumps into a (unity) gameobject with a certain tag (are you seen) on it. I already found a solution, but then I switched my player's movement to a character controller and now it doesn't work. This is my current script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class found: MonoBehaviour
{
private void OnTriggerEnter(Collider collider)
{
if (collider.gameObject.tag == "are you seen")
{
transform.position = new Vector3(-15.38f, 1.93f, 62.1f);
}
}
}

When you switched to character controller, did you remove the rigidbody and collider? An OnTriggerEnter event still requires the player to have a collider with IsTrigger = true, and one of the gameobjects to have a rigidbody. Here is what the offical documentation says.
Note: Both GameObjects must contain a Collider component. One must have Collider.isTrigger enabled, and contain a Rigidbody. If both GameObjects have Collider.isTrigger enabled, no collision happens. The same applies when both GameObjects do not have a Rigidbody component.

How to reference a GameObject's position in a prefab script in Unity

I'm just starting out with Unity and for my first game I'm trying to make these enemy cubes chase the player. The enemies are spawned at a random position and I'm trying to make them move towards the position of the player cube. But when I try to reference the player's Transform, it won't let me drag it on top, any fixes?
using UnityEngine;
public class enemyFollow : MonoBehaviour {
public Transform player;
public Rigidbody rb;
public float movementForce;
// Update is called once per frame
void FixedUpdate()
{
if (player.position.x > transform.position.x){
rb.AddForce(movementForce * Time.deltaTime,0,0);
}
if (player.position.x < transform.position.x){
rb.AddForce(-movementForce * Time.deltaTime,0,0);
}
if (player.position.z > transform.position.z){
rb.AddForce(0,0,movementForce * Time.deltaTime);
}
if (player.position.z < transform.position.z){
rb.AddForce(0,0,-movementForce * Time.deltaTime);
}
}
}
Unity won't let me drag the player from the gameobjects window onto the script on the prefab. The error says "the variable player of enemyFollow has not been assigned"
It won't let me assign Player.

You can add this in a void Start() method:
player = GameObject.FindGameObjectWithTag("Player").GetComponent<Transform>();

If I'm understanding correctly, you're trying to assign the player to the enemy in the prefab configuration. That won't work because the prefab isn't in the scene. Since the prefab could be instantiate in any scene, you can't reference scene objects. You need to do it during playtime, unless all the enemies are already in the scene when you're setting it up (in which case you'd need to do it to an instantiated enemy and then copy paste it).
You can use FindGameObjectWithTag() as in Jeff's answer, but make sure to assign a "Player" tag to the player GameObject or prefab.
Another method which I'd recommend would be to have whatever is instantiating the enemies assign their target, that way you don't need to search for a tag with a string you could mistype, and you can just change the reference in one place when you need to change something.

How come the Collider falls from the GameObject when a RigidBody is added?

I could really need some help with my GameObjects.
I am working on a game in which I want a pick-up Item to create a Physics Force explosion to blow away the enemies. I made a simple Bomb-Object to test this idea. I added a straightforward code, using a loop to collect all the colliders within its radius, to then addForce to these colliders. Now the code is working properly, but not all my GameObjects are reacting properly.
I looked into why this is, and I noticed that my Collider keeps falling away from the GameObject as soon as I add a RigidBody component to the object. The RigidBody is needed for the AddForce impact. When I remove the rb, the collider stays in place, but the object does not react to the Physics Force.
I added some images to illustrate what I mean:
Image of the Collider of the leaf sinking away..
Example image of objects which DO react to the AddForce.
I already tried to:
Copy/Paste all component settings from the reacting Cube and stone
Gameobjects to the Leaf Gameobject while disabling all other code
such as the c# scripts. The Collider & RB do not fall through the
floor but when Physics Force hits the Collider is blown away while
the GameObject keeps its position.
Try different GameObjects/Collider types.
Removed the water.
Play with amount of force/radius of the bomb.
Edited 'Tag' and 'Layerstyle' of GameObject.
The 'Explosion Code' is added below, however, I don't think the problem is in the code. I added the code to the Main Camera of my scene, and added a simple sphere as the 'bomb' GameObject.
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Explosion : MonoBehaviour
{
public GameObject bomb; //set the position of the explosion
public float power = 10.0f;
public float radius = 10.0f;
public float upForce = 0.0f;
private void FixedUpdate()
{
if (Input.GetKeyDown("space"))
{
print("space key was pressed");
Invoke("Detonate", 1);
}
}
void Detonate()
{
Vector3 explosionPosition = bomb.transform.position; //set the position of our explosion to the position of the bomb.
Collider[] colliders = Physics.OverlapSphere(explosionPosition, radius); //collects all colliders within the radius.
foreach (Collider hit in colliders) { //for each individual collider the following code is ran.
Rigidbody rb = hit.GetComponent<Rigidbody>(); //declare'rb' rigidbody. Get rb component from each collider
if (rb != null)
{
print("BOOM!");
rb.AddExplosionForce(power, explosionPosition, radius, upForce, ForceMode.Impulse); //add force to each collider
}
}
}
}
How do I make the Rigidbody, Collider and GameObject of the leaf hold onto each other like the standard 3D object 'cube', so that I can make these blow away with the Physics Force just like the other models?
Thank you for your time, I have been trying things and looking around on the Internet for hours now but can't seem to find any solution.

What happens if you add the rigidbody in stop mode and press play? Does it move away in a similar manner? This may, and is expected to happen, if your colliders intersect with each other. As soon as you add a rigidbody, they find themselves trapped in a serious collision.
If you don't want to modify the scene, you can fiddle with the collision matrix in project settings / physics

On-collision script not working?

in advanced I would like to say if this is a really simple question with a simple answer, I apologize as I have just now gotten into programming.Basically, I'm trying to create a script that a block named blue(picture below) on collision with the FPSController, will get destroyed, here is my script:
using UnityEngine;
using System.Collections;
public class Cube : MonoBehaviour {
void OnCollisionEnter (Collision col) {
if(col.gameObject.name == "Blue") {
Destroy(col.gameObject);
print ("collison detected");
}
}
}
for some reason, though, whenever the fps controller collides with the object known as "Blue" nothing happens, the print() function is not triggered nor is the destroy() function
Thank you in advaned ;)

Rigidbody` is missing from your Cubes.
1.Attach Rigidbody component to both cubes.
2.Also,set both Cubes Rigidbody to Is-kinematic. You must set both Cubes Rigidbody to Is-kinematic so that the Character Controller wont be able to move it. Note that if your cube is falling down after adding Rigidbody, simply disable Use Graivty on the Rigidbody.
Important:
3.Delete FPSController. Since you will be interacting with other Rigidbody GameObjects, use RigidBodyFPSController. It can be found in Assets\Standard Assets\Characters\FirstPersonCharacter\Prefabs. Drag RigidBodyFPSController to the Scene then attach Cube script to it.
You will notice there is a Rigidbody attached to RigidBodyFPSController. Don't modify the settings of it.
That's it. Everything should be working as expected.
Cube settings:
RigidBodyFPSController Settings: