How to check if an object is colliding with another?

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Hey guys,

I have searched Unity Answers and tried different collision scripts, but none of them seem to work. The console has no errors, and i have added box colliders to both the objects. Is there a simple script in which i can use to check if two objects are hitting each other, and then execute some code if they are.......

Here is the script that i am currently trying to use:

 var collisionObject : GameObject;
 
 function OnCollisionEnter(collision : Collision){
     if (collision.gameObject.name == collisionObject){
         Application.LoadLevel("game_scene_01");
     }
 }

Thanks

-Grady

Answer 1

Best Answer

Answer by GuyTidhar · Jul 07, 2011 at 07:57 AM

I do not know if you already done that but:

One of your objects need to be a non-kinematic rigidbody (or charactercontroller) for collisions to work.

http://unity3d.com/support/documentation/ScriptReference/Collider.OnCollisionEnter.html

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Grady · Jul 07, 2011 at 08:19 AM 0

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ermmmm... well i can't add a rigidbody to my aircraft, because otherwise it just falls, and i tried adding a rigidbody to the terrain, and trust me that didn't go down well, the ground just starting sinking down, (like the movie 2012 or somethin')..... :/.

How would i check if my aircraft is coming into contact with the ground, or a building....?

-Grady

Grady · Jul 07, 2011 at 08:25 AM 0

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i just unticked the "Use gravity" checkbox on the terrain's rigidbody

and changed the script to this:

function OnCollisionEnter(collision : Collision){ if (collision.gameObject.tag == "terrain"){ Application.LoadLevel("game_scene_01"); } }

but it will only execute the code inside the if statement once the aircraft gets a bit under the terrain, which is really wierd.... and other objects seem to be in the air...... :/

GuyTidhar · Jul 07, 2011 at 08:26 AM 0

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Do you need gravity to effect your aircraft? If not - just disable the useGravity variable of the rigidbogy.

Have you set the rigidbody to non-kinematic?

Grady · Jul 07, 2011 at 08:28 AM 0

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yea the rigidbody is non-kinematic....

Grady · Jul 07, 2011 at 08:29 AM 0

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ok thanks, it works now, although when my aircraft hits the terrain, it makes this wierd deep sound for a second, but i guess it doesn't matter because i can disguise it with a big loud exploding boom!

thanks

-Grady

Answer 2

Answer by Dominatro · Jun 21, 2013 at 10:43 PM

does the collision script go into the character controller or the rigidbody script?

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Answer 3

I am trying to create a monster truck game where I can use a monster truck to crush junkyard cars...

I am using Unity 5 and using the skycar from the standard asset, but changed it so it resembles a monster truck...

I have downloaded a junk car in the assets store with multiple damage levels,

I want it to use its level 1 mesh before hitting it and then when hit by one of the wheels of the monster truck, to gradually change to level 2, then 3, 4 and finally 5.

I have added box colliders to the junk cars mesh levels, and currently (initially) level 2,3,4 and 5 meshes have their collider and mesh renderer unticked

how can I detect if a monster truck wheel hits the car?

my main body of the monster truck has a rigidbody but the wheels have not and it will always be one of the wheels that will hit the junk car

I can't just add rigid body, no cinematic and no gravity to my wheels can I? And if I can, do I then add the check to the cars carcontroller script, a script applied to each wheel, the junk car or something completely different ??

thanks in advance for any help...

How to check if an object is colliding with another?

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