Ways to detect 2D collision other than OnCollisionEnter2D

Question

This might come off as a stupid question, but in an if statement, is it possible to check if the object is currently colliding with another object?

Here is what I ha

Answer 1

Are there different solutions than OnCollisionEnter2D

Yes. Many of them!

CircleCollider2D, other 2D colliders and its base class Collision2D, have built in functions to do this.

public bool IsTouching(Collider2D collider); //Check collision by the provided collider
public bool IsTouchingLayers(); //Check collision by any collision
public bool IsTouchingLayers(int layerMask); //Check collision by layer
public bool OverlapPoint(Vector2 point); //Check collision by position

The first function is more appropriate for this.

Simple Example:

Collision2D collider1;
Collision2D collider2;

void Update()
{
    //Checks if collider1 is touching with collider2
    if (collider1.collider.IsTouching(collider2.collider))
    {

    }
}

Example with the OnCollisionEnter2D function:

public CircleCollider2D myCircleCollider;

void OnCollisionEnter2D(Collision2D c)
{
    if (c.collider.IsTouching(myCircleCollider))
    {

    }
}