1

I would like to open script “CircleCollider2D”

I want to see how this script handles collision when these evens are raised.

OnCollisionEnter2D

OnCollisionExit2D

OnCollisionStay2D

Is it possible to see the script’s code? If so, how?

3

Unity is not open source. In fact, a lot of its underlying code is written in C++ and compiled elsewhere, so even if you did get access to it, you’d be looking at executable machine code, not a high-level language.

For that case, though, Unity uses the PhysX system for collisions, so those methods are called based on the behaviour of PhysX.

2

You might find something over there

https://developer.nvidia.com/sites/default/files/akamai/physx/Index.html

but otherwise, no