I have the below script attached to the ground game object to detect collisions from my players' child objects but for some reason, the collisions are not detecting.
My player (parent, empty game object) has a Rigidbody and Jump script attached to it, meanwhile, the child game objects (body & feet) have just box colliders on them.
Would love to know why this isn't working :)
private void OnCollisionEnter(Collision collision)
{
if(collision.gameObject.tag == "Body")
{
Debug.Log("Game over!");
}
else if (collision.gameObject.tag == "Feet")
{
Debug.Log("Alive!");
}
}
For some reason, it works when you do collision.collider.tag instead of collision.gameobject.tag, like so:
if(collision.collider.tag == "Head")
{
Debug.Log("Game over!");
}
Not exactly sure why this works, but it works! Defo going to look into this a bit more.
Related
here is my current code:
public GameObject enemy;
void OnCollisionEnter(UnityEngine.Collision collisionInfo)
{
if (collisionInfo.collider.tag == "sword")
{
Debug.Log("works");
enemy.SetActive(false);
}
else
{
Debug.Log("doesnt work");
}
}
i have attached this to the enemy and also i tried a different script attached to the sword
void OnTriggerStay(Collider col)
{
if (Input.GetButtonDown("Fire1"))
{
if (col.GetComponent<Collider>().tag == "enemy")
{
Destroy(col.gameObject);
}
}
}
both codes don't work, it seems that the problem isnt with the sword collision cus i have also added the tag to another gameobject and it doesnt work. i looked online but havent found anything that works so fat
update: it seems that i have forgot you need a rigid body for collision detection. simple mistake but it made my code not work!
For collision enter to work, both the sword and the enemy colliders need to have the "IsTrigger" box unticked.
For on triggerstay is the opposite, both need to have that box ticked.
Basically, Triggers do not collide they call that OnTriggerEnter function, while non-triggers use the OnCollisionEnter.
I try to judge a player's approach to a monster using "OverlapSphere."
But somehow it doesn't work the way I want it to.
Is there anything wrong with the code below?
bool IsPlayerNear()
{
Collider[] colls = Physics.OverlapSphere(transform.position, 3f);
foreach(Collider hit in colls)
{
if(hit.gameObject.tag == "Player")
return true;
}
return false;
}
The player character has a capsule collider and "Player" tag.
But the "colls" array contains nothing.
A frequent cause of this sort of problem is that the capsule collider is attached to a child or parent of the tagged gameobject, so maybe check that, your code looks OK to me.
We are building a 3D game and right now I am stuck on an issue where I need to compare multiple tags to activate or deactivate a trigger that sends the player back to the respawn position.
This is currently the code:
#pragma strict
var spawnPoint : GameObject;
function OnTriggerStay ( other : Collider )
{
if (other.tag == "Player" && other.tag != "Ball")
{
other.tag == "Player";
other.gameObject.transform.position = spawnPoint.transform.position;
}
else if ( other.tag == "Ball" && other.tag == "Player" )
{
}
}
I am uncertain how to fix this to do the following:
If the player touches the trigger without there being a ball colliding with it, the player respawns. This is to create the feeling that the particles kill you.
If the player touches the trigger when there is a ball colliding with it as well, nothing happens to the player and so the player can freely pass through.
What we want to do is that we want to push a ball over a geyser so it covers it and if the geyser is not covered and the player tries to pass over it, the player respawns.
We also tried with another code and while it allows the ball to pass, it does not allow the player to do so. Even after the ball has been placed.
#pragma strict
var spawnPoint : GameObject;
function OnTriggerStay ( other : Collider )
{
if (other.tag == "Ball")
{
other.enabled = false;
}
else if (other.tag == "Player")
{
other.gameObject.transform.position = spawnPoint.transform.position;
}
}
So, I believe your problem is, when you use that function, you are only checking the first collision. So whats happening is your getting a value of either the player or the ball, not both. You need to store all the collision so you can compare all of them. To do that you can follow the generals of this documentation. http://docs.unity3d.com/ScriptReference/Collision-contacts.html
It's talking about collisions, but the same general principle should apply.
Hope this helps!
I am have some difficulty with what is probably a very silly thing. I have an enemy gameobject that depending on where it is hit (collision) - either it, or the play dies. I think the simplest way to describe this is by using the classic Super Mario Bros. game as an example.
As you all know, if the player runs into the enemy - the player will lose - UNLESS he jumps on top of the enemy's head, in which case the enemy should die.
My initial idea was to create two colliders on the gameobject:
Blue border represents a BoxCollider2D - that if collided with - will cause player to lose (notice it is slightly lower from the top)
Green border represents a BoxCollider2D on a child gameobject - that if collided with - will cause the gameobject to die.
The following is a simplified version of the code I used:
// Collider #1
public void OnCollisionEnter2D(Collision2D collision)
{
// Trigger 'Game-Over' logic
}
// Collider #2
public void OnCollisionEnter2D(Collision2D collision)
{
if (collision.gameObject.tag == "Player")
{
Destroy(this.gameObject);
}
}
This kind-of works, however momentarily after colliding with Collider #1, Collider #2 is also trigger - and while the enemy is destroyed, the player also loses.
I have been playing with the RigidBody2D values to prevent the player from entering the 2nd collider when hitting the enemy from the top - but apparently with that force / speed, the colliders may be slightly inaccurate (or maybe I'm just doing it wrong?).
I have looked into RayCasts but this seems too complex for something that me appears rather trivial (casting rays on all four sides and four vertices of the player - assuming that the player has a box collider).
What I have resorted to 'for the moment' is a a single collider with a simple piece of code that I am unhappy with, and doesn't always work:
public void OnCollisionEnter2D(Collision2D collision)
{
if (collision.gameObject.tag == "Player")
{
float yVelocity = collision.gameObject.transform.rigidbody2D.velocity.y;
if (yVelocity < 0)
{
Debug.Log("Enemy will lose..." + yVelocity);
Destroy(this.gameObject);
}
else
{
// Trigger 'Game-Over' logic
}
}
}
I'm currently working in 2D mode, but solutions for 3D mode (while maybe more complicated than necessary for my question) will also be considered.
Thanks guys.
as a game developer you always have many ways to solve a problem or make a gameplay.
first of all i have to say you should make a polygon collider 2d fo you objects and chracters. just colliding pictures is not very good as i see you used box cilliders in your game.
a good choice can be that you attach and empty object ot you player and set its position under foots of you player and check of enemy hit that enemy dies else if enemy hit main character object, player dies.
another choice can be when o objects collide check y position of 2 objects. of player was higher he kiils, else enemy kills the player.
if you think more you will find more answers.
you have to examin diffrent ways and find most efficient.
I think it will be easy to disable the other collider when one is triggered. You can easily enable/disable colliders with collider.enabled = true; or collider.enabled = false;
// Collider #1
public void OnCollisionEnter2D(Collision2D collision)
{
// Trigger 'Game-Over' logic
// collider2.enabled = false;
}
// Collider #2
public void OnCollisionEnter2D(Collision2D collision)
{
// collider1.enabled = false;
if (collision.gameObject.tag == "Player")
{
Destroy(this.gameObject);
}
}
This way it will be pretty lightweight and easy to implement.
One way of implementing what you want is to put each collider in its child own game object and use the IsTouching() method.
void OnTriggerEnter2D(Collider2D other){
if(GameObject.Find("Top Trigger").GetComponent<BoxCollider2D>().IsTouching(other)){
Destroy(transform.gameObject)
}
if(GameObject.Find("Bottom Trigger").GetComponent<BoxCollider2D>().IsTouching(other)){
Destroy(other.gameObject)
}
}
I'm currently making a infinite runner type game for a class project and I need some help with collisions.
The game is set up as a 2d platform where a character is running (or made to look like they're running with a scrolling texture) through an infinite tunnel. The player has to avoid obstacles similar to Flappy Bird using jumps. The script I'm using at the moment is setup so that when the player collides with obstacles the game will reload.
The issue:
The issue is that the code I've used applies to all collisions so when the player hits the ground platform the game reloads.
What I want to happen:
I want the character to be able to run on a platform and die when he hits the a specific obstacle.
So I'm think I need to specify a GameObject to collide with?
This is my current code:
// Update is called once per frame
void Update ()
{
// Jump
if (Input.GetKeyUp("space"))
{
rigidbody2D.velocity = Vector2.zero;
rigidbody2D.AddForce(jumpForce);
}
// Die by being off screen
Vector2 screenPosition = Camera.main.WorldToScreenPoint(transform.position);
if (screenPosition.y > Screen.height || screenPosition.y < 0)
{
Die();
}
}
// Die by collision
void OnCollisionEnter2D(Collision2D other)
{
Die();
}
void Die()
{
Application.LoadLevel(Application.loadedLevel);
}
}
Use tags. For example, use a terrain tag for the ground. If the object tag is terrain, then don't die.
Here is a simple example:
void OnCollisionEnter2D(Collision2D other)
{
if (other.collider.tag == "Terrain")
{
Debug.Log("Don't die!");
}
else
{
Debug.Log("Die!");
}
}