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Question by billingsleyjon · Sep 20, 2017 at 11:12 PM · rigidbody2dphysics2dcollider2d

Which is collider and which is othercollider?

This code is in a script attached to game object with a rigidbody2d and collider2d

 void OnCollisionEnter2D (Collision2D collision)
     {
         print(collision.collider.gameObject);
             print(collision.othercollider.gameObject);
     }

I'm having trouble understanding which is which. If this object's collider enters a collision, shouldn't collision.collider be THIS objects collider, not the other one?

I don't need help with a specific code problem, I'm just tying to gain more conceptual understanding

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avatar image sarneeh · Apr 21, 2018 at 12:27 PM 0
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Please tell if you did get the answer for this question as it's really confusing.

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Answer by Hellium · Apr 21, 2018 at 01:55 PM

According to the documentation:

    • collision contains all the information about the collision (doc)

    • collision.collider is the incoming collider (doc)

    • collision.otherCollider is the other collider involved in the collision, most likely a collider attached to the current gameObject or one of its children (doc)

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avatar image Nikaas · Oct 16, 2019 at 11:06 AM 1
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The na$$anonymous$$g is weird/reversed. The intuitive way I$$anonymous$$O is "other" the be the inco$$anonymous$$g one and "this" (i.e. no special na$$anonymous$$g) to be the one that is part of the same hierarchy/rigidbody that current component is.

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