In my game a player plants a bomb, the bomb explodes creating a fire effect, I would like my fire to be able to kill the player(blue cylinder) and any boxes it collides with. My box and player have colliders. My fire effect is instantiated when the bomb explodes.
How can I make my fire effect destroy my player and box objects?
Can I say something like if fire collider hits player collider, destroy player?
My code for the bomb is as follows
Instantiate(Firebolt, bomb.gameObject.transform.position, Quaternion.identity);
Game Layout
You can add a collider to Firebolt as well and use OnCollisionEnter on it, checking if the object you hit is a player or a box.
This is a simple example that destroys any player or box it collides with:
void OnCollisionEnter(Collision collision) {
GameObject other = collision.gameObject;
// Here I'm using tag to detect if the hit object is a player or a box
// but you can use name or other methods
if (other.tag == 'Player' || other.tag == 'Box') {
Destroy(other);
}
}
check out https://docs.unity3d.com/ScriptReference/MonoBehaviour.OnParticleCollision.html
you can apply it to the ParticleSystem or to the target GOs that should react to it.
(u also need to activate collision detection on Particle System AND set it to world.
Related
I'm developing a simple 2D Unity game (which I'm very new to so sorry if this is a silly question!) in which my player can eat its enemies by colliding with them. This works fine as I'm just selecting the "is trigger" component for the enemies and using this code in my Player class:
private void OnTriggerEnter2D(Collider2D other)
{
Debug.Log("Hit detected");
Destroy(other.gameObject);
transform.localScale += new Vector3(x, y, z);
}
However, this means the colliders placed around the border of my background image aren't stopping the enemies. What's the best fix for this?
I don't understand very well your question. However it seems that your collisions are not working. So, remember that for have collisions actually taking place in your game you need to use colliders and that one of the two elements participating in the collision need to have the rigidbody component.
That will make the physics work in the engine, which triggers dont.
To check if that works you can debug with:
// called on collision
void OnCollisionEnter2D(Collision2D col)
{
Debug.Log("OnCollisionEnter2D");
}
From what I understood, you want only to detect triggers between the player and the enemies, but you still want these to collide with physic objects in your scene, such as background colliders.
One possible way to achieve this is to create a child object for the player object with a collider component with the trigger option set, and attaching a script to it to handle the triggers. Then, with the use of layers to group your player and enemy objects, you can uncheck the collision between them following: Edit -> Project Settings -> Physics 2D: "Layer Collision Matrix".
You can assign a script to any enemy, checking the distance with the player in each frame. Then you can Uncheck "is trigger"
Vector2.Distance
Right now, I have a multiplayer game where the player fires projectiles at other players that have a certain amount of bubbles. Once a player has lost all of their bubbles, they lose.
The issue I had previously was that on one screen, a first player could shoot out a second player's bubbles, but not all of the bubbles on the second player's screen would be popped, so I am trying to sync it over the network somehow.
The issue I'm seeing is that NetworkServer.Destroy requires finding the GameObject you intend to destroy by its NetworkIdentity, but only the root Player GameObject is allowed to have the NetworkIdentity component on it. What's the best way I can sync the destruction of a child object of a player?
The https://unity3d.com/fr/learn/tutorials/topics/multiplayer-networking/ course is very similar to the game you describe. It has a Bullet script attached to the fired bullets. If the bullets touched something, it check if it's a player, and apply damage to it (the player prefab has a Health script attached to it).
using UnityEngine;
using System.Collections;
public class Bullet : MonoBehaviour {
void OnCollisionEnter(Collision collision)
{
var hit = collision.gameObject;
/* Code below is from the original example
var health = hit.GetComponent<Health>();
if (health != null)
{
health.TakeDamage(10);
}*/
var bubble = hit.GetComponent<BubbleBehavior>();
if (bubble != null)
{
bubble.Popped(); // Implement a Popped function doing the magic
}
Destroy(gameObject);
}
}
In your case you can do the same, but instead of checking if the touched object is a player, simply check if it is a bubble, and do whatever you want from the touched bubble.
In the original example, they sync the health (it is a "SyncVar"), in your case you can sync the number of bubbles remaining.
I have a cube tagged "player", which needs to jump at certain locations, represented by Empty GameObjects.
I want to make a point system and that why I put on some of the places other game objects tagged "Coin"
The cube has an animation which plays each time it moves to another point recognized by clicking with the mouse on it.
When I jump on the coin location I want the Coin object to get destroyed.
I use this function:
void OnTriggerEnter(Collider col){
if (col.gameObject.tag == "Coin") {
Debug.Log ("Plm");
stroy (col.gameObject);
}
The problem is that when I'm jumping at the Coin location nothing happens.
I have box colliders on both objects and OnTrigger checked on both.
1) Make sure one gameobject has a rigidbody
To have the OnTriggerEnter happen you need at least one of the two object to have a RigidBody attached to it.
2) Static Trigger Collider
An object that has a collider and isTrigger checked but no rigibBody is considered a Static Trigger Collider which are From Unity Documentation:
This is a GameObject that has a Collider but no Rigidbody. Static colliders are used for level geometry which always stays at the same place and never moves around. Incoming rigidbody objects will collide with the static collider but will not move it.
This type of collider interactions is perfect for your coins because they do not move and stay static.
3) Rigidbody Trigger Collider
The next type of collider interactions is a Rigidbody Trigger Collider which are :
This is a GameObject with a Collider and a normal, non-kinematic Rigidbody attached. Rigidbody colliders are fully simulated by the physics engine and can react to collisions and forces applied from a script. They can collide with other objects (including static colliders)
This type of collider is what you need on your player and as it says in the Unity Documentation it will be able to collide with the Static trigger collider.
Important observation:
Having IsTrigger set to true on your player collider will cause your player to not respond as a solid object
A collider configured as a Trigger (using the Is Trigger property) does not behave as a solid object and will simply allow other colliders to pass through.
which might not be the most optimal solution for you because most of the time you want your player to be able to collide with other things like the ground. So you can set the isTrigger to false and just have a rigidbody on you player and it will react to the coins if they're set as Static Trigger Collider.
If you want an easy way to know what can collide with what Read the colliders documentation and take a look at this chart that shows it in a more simpler way.
If I have a player and let's say a red ball hits my player and the player goes on fire... OK easy enough I did that. But now I want to add to the code below under the if statement that a blue ball hits my player and freezes or a black ball and causes death animation... But it's just not working out to add multiple animation events to 1 player.
Public GameObject GoneGo;
void OnTriggerEnter2D(Collider2D collisionObject)
{
if (collisionObject.gameObject.tag == "Orb")
{
PlayGone();
}
}
void PlayGone()
{
GameObject gone = (GameObject)Instantiate(GoneGo);
gone.transform.position = transform.position;
}
What you could do is perform a name check on the collider that impacts the player. You already have it checked the tag, have it check for redball,blueball, or blackball as the GameObject name afterwards.
You can handle multiple animations by looking into unitys mechanim system, which is the animator component (not animation component).
https://community.mixamo.com/hc/en-us/articles/203879268-Unity-Mecanim-Animation-Basics
What you would do after setting up the animator is have it SetTrigger for different trigger parameters. Or, you could use something like SetBool with a bool in the parameters like HitByBlueBall or HitByRedBall.
Hope this helps!
This is for a 2D game.
I have a Player who can shoot trigger projectiles(with a trigger collider) and Enemies that can do the same. When a Player projectile collides with the Enemy, stuff happens and vice versa. However, when the Player projectile and the Enemy projectiles collide, they just ignore collision, go through each other, and nothing happens. They also have a Rigidbody2D with continuous collision detection.
Is there a way to make it so something happens when these two gameObjects with trigger colliders touch?
Here's what I've got for the Enemy projectile script:
void OnTriggerEnter2D( Collider2D other ){
if (other.gameObject.name == "Ground"){
Destroy (gameObject);
}
else if (other.gameObject.name == "Player"){
other.gameObject.GetComponent<RControlScript>().RHealth = other.gameObject.GetComponent<RControlScript>().RHealth - damage;
Instantiate(transformInto, gameObject.transform.position, gameObject.transform.rotation);
Destroy (gameObject);
}
else if(other.gameObject.name == "Shot"){
Destroy (gameObject);
}
}
"Shot" being the name of the Player projectile being the gameObject not colliding with the Enemy projectile.
Yes.
Here is a graph that tells you what collides with what in Unity3d.
Ok, turns out two trigger colliders do in fact collide. My problem was that the projectiles instantiated were clones, therefore its name = "Shot(clone)". Had to change that in order to make things happen.