How top detect collisions from the side of a tilemap

[rapid lion]

So I'm trying to make a platformer, and I want my enemies to go back upon touching the walls, which are part of a tilemap. Unfoprtunately, they just keep walking into the wall, and they only detect it very inconsistently.

'''void OnCollisionEnter2D(Collision2D col)
{
Debug.Log("Collision Enemy:" + col.gameObject.tag);
if (col.gameObject.CompareTag("Ground"))
{

        Vector3 dir = (col.gameObject.transform.position - gameObject.transform.position).normalized;

        if (dir.x > 0)
        {
            // hit right
            bIsGoingRight = !bIsGoingRight;
            transform.localScale = new Vector3(-transform.localScale.x, transform.localScale.y, transform.localScale.z);
        }
        else if (dir.x < 0)
        {
            // hit left
            bIsGoingRight = !bIsGoingRight;
            transform.localScale = new Vector3(-transform.localScale.x, transform.localScale.y, transform.localScale.z);
        }
    }
'''

[granite haven]

!code

[tawny dome]

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[dapper root]

@rapid lion

[rapid lion]

i know, i'm trying to fix it

[granite haven]

I would not use OnCollision either

too inconsistent

Raycast is much better