With a whole bunch of copy-pasting from all over the web, I managed to hack together a piece of C# code which spawns a random object from an array when the player enters a large, spherical collision trigger. When the player leaves the trigger, the object is deleted. It's working almost as intended, only problem is that six out of ten times when the player passes through the collider, for a split second it feels like a physical collider. Meaning that although the player is trying to move straight forward, he or she will move left or right along the trigger collider for about half a second, before the object spawns and the player can move freely again.
I was under the impression that checking the "Is Trigger" box would remove all physical properties of that specific collider? Am I missing something?
I'm using the standard FPS Character Controller in Unity 5 if that might have something to do with it.
All help is greatly appreciated.
Make sure the spherical collision trigger has a rigid body component, and that the "Is Kinematic" property of the rigid body is checked.
Realized my solution didn't get posted as I thought it had. Yoyo's solution was correct. The object containing the code was also the trigger. Switched so that the player was the trigger and now all is well.
Related
I have 2 simple capsules. 1 is stationary and the other is moving to the same tile on the tilemap using transform.position.
Both capsules have capsule colliders and rigid bodies. I've attempted to remove the rigid body but from what I can tell, the OnCollisionEnter function requires a rigid body to work.
My script, attached to both of these, is a simple:
private void OnCollisionEnter(Collision other)
{
print("Collision Detected! " + other.gameObject.name);
}
I've used combinations of 'isKinematic', 'isTrigger', placing one component before the other then reversing, ensuring I have the script attached to both objects, making sure my capsule collider is sized to the object, and looked at other people's issues to try their steps to fix my issue.
Nothing seems to trigger the collision between the 2 capsules. It's got to be something small I'm missing.
I have a tag on both objects and have tried things like if(other.gameObject.tag == "myTag") {...} but that's not working for me, either.
Can anyone spot my mistake? Let me know if you need to see anything else - happy to provide images or whatever will help. Thanks in advance!
Above is the basic identical hierarchy of both capsules with components attached to the capsule mesh. Both have the parent empty objects they're stationed under. (Which themselves, contain scripts but no collider or rigid body)
Here is an infographic to show when a collision message will be detected by OnCollisionEnter between two objects. Both objects will need some sort of collider, and will most likely need a Rigidbody.
You will not want to set isTrigger as that will not make it physically react to a collision, but will just detect when a collision occurs. It will also not call OnCollisionEnter but will call OnTriggerEnter. Setting both not as triggers, adding a collider, and giving them Rigidbodies should allow the collision to be detected. You will also need to attach this script to one of the objects that have the collider. Are there other components on the objects you are using?
Make sure you are not looking for
void OnTriggerEnter(Collision collision){}
So say I have two sprites. These sprites will not have any BoxCollider2Ds or RigidBody2Ds.
How would I be able to detect if a sprite is touching the other sprite using a script inside of the first sprite.
For example I have a player and a flag. I would want something to happen when the player touches the flag
Sorry if this is poorly written or not informational enough, if you need any more information please just leave a comment and I'll respond.
Do you not want the collider due to the physical repulsion due to the collision? If you are looking to just detect if two objects have entered one another, Triggers might be what you are looking for. You will need to have a collider on both objects, but can mark them isTrigger. To see exactly what you need in order for the OnTriggerEnter2D to go off, view the collision action matrix.
If you really want nothing to do with colliders, you can implement basic collision detection yourself for these two objects. For two simple boxes, you can use AABB collision detection, which is just taking the corners of two boxes and determining if the corners overlap.
if (obj1Pos.x < obj2Pos.x + obj2.width &&
obj1Pos.x + obj1.width > obj2Pos.x &&
obj1Pos.y < obj2Pos.y + obj2.height &&
obj1Pos.y + obj1.height > obj2Pos.y) {
// collision detected!
}
If you want to learn more about self implementation to detect 2D collision, this is a good read. With more complex geometry, collision gets more advanced, but I believe you just want to use triggers. If you have more questions about what triggers are, how they function, etc. I can answer them but I was not exactly sure on how you wanted to approach your problem.
Hi guys i was wondering how to create a shape adjustment with two objects which specifically could be described as the independent cells, one of which is static, and the second one is dynamic and surrounded by "plasma". The movement of the active object must be controllable by the user (WSAD). Collision of the active object with the static one causes the static object to be swallen, though doesn't change it's position stays in place all the time. As the active object moves, passes the swallen object and troughts it out.
See the image below:
Player character
When it comes close enough to pink enemy it's starting to swallow it (surround by yellow thing)
Pink enemy is completely sourrounded when red circle is in the centre of both.
When it leaves enemy it takes off the yellow thing
I was wondering what is the simplest way to do it. I've been thinking about cloth, physics joints, mesh substraction (is it even possible?), some kind of animation... I don't have much time to do it. Can you show me the simplest way. Which tools and approach should i use? I'm not asking for full code or full solution only for some tips.
Tim Hunter mentioned a wonderful way, most perfect in 3D.
You can use another approach in 2D :
Inside OnCollisionEnter2D try finding hit points using Collision2D.contacts . See this reference .
Create some particle effect there.
Disable the enemy
Now play swallowing animation of the player.
At animation end, enable enemy again.
Maybe calculation is little tricky, still efficient.
I'm having a problem with Physics! I have imported an object which a bridge from 3ds max to unity 5 ,but the problem is that whenever I want to walk through on it ,I just fall down. It's like there's nothing called BRIDGE! I know there must be a problem about Physics. But how to fix it ?!
When importing a model into Unity it does not have any Collider.
Even though using auto-generated "MeshColliders" is an option
I highly recommend not to use them.
You never need such highly detailed colliders in a game.
Instead, you have to
Add the colliders manually
Here is a little step by step guide
This is the imported model (made with blender) without any collider whatsoever
First thing to do is add a new box collider to the components
as shown in this gif
The next thing to do is scaling the box collider
by either entering the values manually or using the drag/GUI version like I do in the gif below
(you probably know that already but the mode can be changed to orthographic by licking the small cube in between the cones in the upper right)
If necessary you can add as many "detail" collider as you want
by repeating the steps. Sometimes sphere or capsule colliders might fit better but keep in mind that they have a higher resolution!
In this case i added another box collider representing the upper part of the car:
Thats all you need to make things collide with your object
Right now you only have a MeshFilter, MeshRenderer, and Animator component attached. You walk through it because the mesh is only being rendered. In order to add collision, add a MeshCollider component to it.
Joe offers another way to do it with box colliders. There is a bit to know about both methods:
Box colliders will take more time to set up (rather than just adding a
component) and will have less precision. They will have faster performance.
Mesh colliders do not collide well with other mesh colliders.
However, this is often not an issue. If a mesh collider has the
"convex" checkbox checked then it will collide just fine with other
mesh colliders. Small items and any convex-shaped meshes should have
"convex" checked.
For something like your bridge.. it depends on your game. If you are doing a top-down game with limited mobility (no jumping) then box colliders may work for you. If you are making a first-person game then I would strongly suggest mesh colliders. If you decide to use box colliders then you must set them up carefully. Otherwise, physics may not match up with what the player sees!
Do not worry about performance at this time. Worry about it later IF it becomes an issue. With the physics upgrade in Unity 5, it probably won't be.
I have a character, that has a character controller attached to it I am using transform.position, transform.forward and transform.rotate to move with the 'wasd' keys, that all works fine.
However it will not collide with any sort of colliders, whether is be box colliders or mesh colliders. trigger works on my character, i.e. it can trigger an object to destroy if it passes through, but the colliders that are not set to triggers (like walls), don't block the player, the player just goes through them.
Any ideas?
Note: using C#, unity free version 4.5.1
You Should not use transform for colliding.
Add ridged body and get reference to ridgedbody.
Then use reference.addForce
Guys i figured out the problem, as the previous answer said i should not use transform with character controller, however there's no need to change any colliders, i still kept my character controller on my player, but rather i used controller.SimpleMove to move the character, that fixes the problem and i get to keep the character controller on my object (no need to add extra colliders or rigidbody to the player).
http://docs.unity3d.com/ScriptReference/CharacterController.SimpleMove.html