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Votes

24

Found in

4.3.0f4

Issue ID

575251

Regression

No

Rigidbody2d with kinematic rigidbody will not cause OnTriggerEnter2d

Physics2D

-

To reproduce:
1. Create two 2D cubes with colliders 2d
2. Attach a rigidbody 2D to one of the cubes and make the other cube a trigger
3. Attach a script with OnTiggerEnter2D (and some kind of debug message) to the rigidbody cube
4. Enter play mode and move the cube into the other cube - the debug message should get printed
5. Change the rigidbody 2d to kinematic - the debug message is no longer printed, OnTriggerEnter2d is no longer being called

Explanation: kinematic bodies (specifically colliders attached to those bodies) only collide with dynamic bodies.

The allowed collisions for body types are therefore:
Kinematic can collide with Dynamic
Dynamic can collide with Static, Dynamic & Kinematic
Static can collide with Dynamic
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Comments (45)

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  3. 36c65e3934745df83910152c6a077e4a?d=mm

    shubhamswaraj2021

    Aug 18, 2020 11:22

    good one <a href="https://www.lyricsauto.com">lyricsauto</a>

  4. 3fe82d7aa727723eb28f560c329329ba?d=mm

    anguaji

    Sep 18, 2014 10:45

    For anyone struggling with this issue (as I was yesterday after grabbing the PSM Unity which is 4.3.4) - setting your rigidbody collider that would normally be kinematic to NOT kinematic (ie physics has an effect on the object) and then setting the gravity scale of that item to 0 (ie physics has an effect but gravity does not cause item to drop) helped me fix my problem. Good luck to anyone with this issue!

  5. 11442e7f66f6c757ee2c61d168948342?d=mm

    ShadowM8

    Aug 26, 2014 01:01

    I know this is old but for our new project we were going to use the 2D tools and this issue is causing a lot of difficulties.

  6. F99bb7a3b7909216f920b76c46c283aa?d=mm

    AronTD

    Jul 07, 2014 22:34

    This is awful.

  7. 28dc922a110f665fbbc5fa2eac2f46be?d=mm

    FireMutant

    Jun 20, 2014 03:59

    2D Physics is useless as long as this issue exists. I'm at a standstill.

  8. 06af8b57a43bc60a01eb1ace2ba7a0ea?d=mm

    Simon Says

    May 24, 2014 22:06

    This just renders the whole 2D physics package unusable, since 3D physics can be used instead and relied upon to behave as expected. Bad design.

  9. Ef2943f045e897ebe36a59651e5eb0e5?d=mm

    KocorJIA3ue

    May 24, 2014 08:45

    Fix it please

  10. 5cccae51a388b9519630e41dfd4411ea?d=mm

    metinevren

    May 17, 2014 01:49

    This is still happening in 4.3.4f1. Please help.

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