So I have a bit of an issue with some unity scrip. I have a moving object, a ceiling to be specific, and I have it lower and 'crush' the player. However, it's not working. The ceiling moves, but nothing happens when it collides with the player. It used to work if the player was moving when it hit them but it isn't any more and I haven't changed any of the script so I don't know why that's happening.
Interesting suggestion from your teacher. I would put a character controller on your player, which you seem to have already. Then I would add the collision code:
void OnCollisionEnter(Collision c)
{
// die.
}
Then add a box Collider and Rigibody to the roof. I would also add this code above to the roof.
Related
I have a bullet game object and an enemy game object.
I want to have the ability of getting the collision point/contact, which's why I think I need the collider of the bullet to not be a trigger collider - this way, I want to have the bullet bounce off the enemy. At times, the bullet will need to bounce off of rectangular objects (not a problem), but I also want the bullet to bounce off of elliptic objects (the problem).
I want the bullet not to "physically" push the enemy, which is why, intuitively, I should set the bullet's collider to be a trigger collider.
When the bullet's collider is a trigger collider, I seemingly don't have a way to implement the bouncing.
But when the collider's not a trigger collider, it pushes the enemy object.
There's no code errors, but I think the code hasn't got anything to do with the problem.
I suspect the problem may have something to do with the Physics Collision Matrix.
EDIT
It seems that raycasting would be the solution to the problem, as Leoverload proposed. My problem became a different problem now, so I'll close off this thread, and open a new one.
Thanks for the help, #Leoverload ! :D
For the position of the hit it's very easy. You must have 2 colliders and 2 Rigidbody and then you can simply add a
Void OnTriggerEnter2D(Collision Coll) and inside it check for the tag : if(coll.compareTag("surface")) and inside you can get the position with collision.transform.position.
The collision matrix on the Physics menu only allows to remove Collision between certain layers, it's useful if you want the enemies not to push eachother!
If you don't want the player pushed you can change the collider to trigger, and destroy the bullet just after the collision with the same method as before with a void OnTriggerEnter2D and the compareTag. In this way it will look like it touches the enemy and explode, but it won't actually touch anything. If you want to add knockback to the player then you could do a simple AddForce based on the direction of the bullet and the work is done!
If you want to avoid the bullet to move walls you can set walls to static and it should work fine
I know this question has probably been asked many times, but I'm going to ask again.For some reason, my colliders won't work. I have one on my block sprite, and another on my 'miner' sprite. When I hit play, the two start on top of each other. (I'm not sure if this matters, it appears to make no difference.) Each one has a Box Collider 2D. In the script assigned to one of them, it tries to see the collision.
void OnCollisionEnter2D(Collision2D collision)
{
if (col.gameObject.name == "Miner")
{
GameObject.Find("Miner").GetComponent<miner>().block = block;
}
}
However, this script does not seem to detect the Miner sprite colliding with it. I am certain I am deriving from MonoBehavior, so it's not issue there.
Do either of the GameObjects have a RigidBody2D attached to them? At least one GameObject needs to have a RigidBody in any given collision.
Add some debug statements in your code so that you are sure this method is not running. You should read up here about Collisions in unity. Decide if these objects will be moving and set the appropriate collider. As stated above you will typically need a rigidbody.
I have a player object that I put on the "Player" layer. I unticked Player/Player in the collision matrix(not the physics2D one).
That made it so I could walk through another player without colliding.
But I noticed that if I jump ontop of another player then I get stuck on the "head". https://gyazo.com/112d91b4edc3bb5e1de827ff69b9297d
I tried debugging from an OnCollisionEnter function but it shows nothing while I am ontop of the other player and It printed when I was on the ground.
private void OnCollisionEnter(Collision collision)
{
print(collision.gameObject);
print(collision.gameObject.layer);
print(collision.gameObject.GetComponent<Collider>());
}
Disabling the collider on one of the players at runtime obviously made me fall through the other player but I can't have it like that.
The raycast used to detect the ground for the purposes of handling character physics does not have the correct layerMask.
It needs to include the player layerMask so that it does not result in a false positive for contact with the ground.
so I've got an enemy in my 2.5d platformer, that I already got to follow the player around, now I want him to jump over small obstacles, and honestly, I have no idea how to. My enemy is a sphere with rigidbody and a box collider scaled 2x in X axis, effectively making it 2 times wider than the sphere. I want this box collider to be a trigger and for it to launch a AddForce.
Where do I put the code for the trigger - if I put it in void update() wouldn't it apply force until the sphere is above the obstacle? I only want it to apply the force once.
Also, what would the code for the trigger look like?
So far I only got figured out how to find the rigidbody by getcomponent and apply force to it, and I watched a video on triggers, but it didn't really help :/
Use OnTriggerEnter method like this:
void OnTriggerEnter(Collider other)
{
if (other.tag == "IMakeEnemyJumpBeforeAnObstacle")
{
// add force here
}
}
Note: this code should be in your enemy script. Plus use IMakeEnemyJumpBeforeAnObstacle tag on the trigger object which will be placed right before the obstacle. And make sure both the enemy and the other object have property IsTrigger checked from inspector.
Learn More
Hope this helps
So I'm new to Unity and I'm sure I'm missing an easy step, but after looking online for a while for some reason I can't find the solution.
I have two objects on the screen, player and enemy. Both have Rigidbody2D, and Box Collider 2D attached. On Box Collider 2D I have clicked is triggered On Rigidbody2D for both I have clicked Is Kinematic. On player I have a simple movement script. On the enemy object I have this:
void Update () {
RaycastHit2D hit = Physics2D.Raycast(transform.localPosition,transform.right,Mathf.Infinity);
Debug.DrawRay(transform.localPosition,transform.right);
if (hit)
Debug.Log(hit.collider);
}
Now for some reason when I move player over the object if (hit)
is true, but if I move the player anywhere on the right side it is not true. What would be the reason for this? Thanks.
First of all you don't need Rigidbody for raycast detection, only colliders. Second, Physics2D.Raycast uses world position, not local, so replace "transform.localPosition" with "transform.position", this messes it up a lot if the transform is child of something. Take in mind that you are sending raycast from the right side of your transform, so maybe it's not hitting anything and values you are getting are actually correct.