koobas.hobune.stream
OnCollisionEnter not working
I'm having some issues with a certain use case when two objects touch on screen, but do not "collide".
The scenario is, that the bottom of the screen has shapes. When i click on the shape and drag, it generates a new shape and follows the mouse cursor, while following the mouse, the rigidbody is set to kinematic. When the shape is let go, i turn on gravity to make it drop to the bottom of the screen hitting a floor surface. When it reaches resting point, i turn it back to kinematic so that it stays in that position.
The problem arises when i create another object and try to drag it into the object on the floor. For some reason it doesn't detect collisions between these two objects. However. If i drag two objects simultaneously and make them touch their OnCollisionEnter scripts get fired.
Is there a limitation i am overlooking? Can two kinematic objects not collide?
Cheers
From http://unity3d.com/support/documentation/ScriptReference/Collider.OnCollisionEnter.html "Note that collision events are only sent if one of the colliders also has a non-kinematic rigidbody attached." You could maybe use OnTriggerEnter instead.
Excellent. Thanks for that, i must have overlooked that line =/ I'll try a combination of triggers and colliders to see if i can get the desired effect.
Alright, so that does allow me to test two kinematic objects if they collide. But then the issue comes where you cannot test between a kinematic and a gravity based object anymore, because one now has to be a trigger to test against kinematic. It all gets too confusing and complex for what it needs to be.
Your answer did provide enough info for my question however =] Unfortunately it is not the optimal solution for the problem i'm trying to solve.
Can't you do somthing like:
While draging: IsTrigger = On, $$anonymous$$inematic = 0n.
While falling: IsTrigger = Off, $$anonymous$$inematic = Off.
Else: IsTrigger = Off, $$anonymous$$inematic = On.
And then use OnTriggerEnter while it's dragged and OnCollisionEnter for every other state?
@hathol This doesn't seem to be the case in 4.1. I have two gameobjects that are colliding (one can't pass through the other), and one has a non-kinematic rigidbody. Despite all of that, OnCollisionEnter is not called.
make sure you're spelling it right and case sensitive (OnCollisionEnter, OnTriggerEnter), spelling it wrong will not cause an error so you won't know.
Thank you for that comment :D I was going crazy with this problem and noticed that I wrote "onCollisionEnter" ins$$anonymous$$d of "OnCollisionEnter". Thank you thank you thank you!
happy it helped :) I was going through the same thing myself...
thanks for this. lol i have been program$$anonymous$$g off and on since 1986 and i still managed to mess this up. So used to python, C++, etc, where method names almost never start with capital letters.
you're most welcome :) happy to help. have a great weekend my friend :)
void OnCollisionEnter2D(Collision2D col) { if (col.gameObject.tag != "Enemy" && col.isTrigger != true) { Destroy(gameObject); } }
you have to write Collision2D not Collider2D .. :)
https://docs.unity3d.com/ScriptReference/Collider.OnCollisionEnter.html
obviously it through error because this is collision not trigger, you wants trigger then write this
void OnTriggerEnter2D(Collider2D col) { if (col.gameObject.tag != "Enemy" && col.isTrigger != true) { Destroy(gameObject); } }
https://docs.unity3d.com/ScriptReference/$$anonymous$$onoBehaviour.OnTriggerEnter2D.html
