2D Platformer Collision Detection

[warm glacier]

[Solved]

Hi everybody, thanks for taking a look at this for me.

I am having an issue with my platforms in my 2D Platformer. I have things set up so that if the surface is flat-ish, I ought to be transitioning from my airbourne state to my grounded state. However, on my tilemap collider 2D that I am using for my platforms, I am having the strange issue where if

1. I touch the 'surface' from a side angle,
2. Hit another flat-ish surface that is part of the same tilemapcollider2D
3. My character will be stuck in the airbourne state

Video and code in the thread.

Here is my TilemapCollider2D

Here is my collision handling method.

    public override void HandleCollision(Collision2D collision, CollisionType collisionType)
    {
        if (collisionType == CollisionType.Enter &&
            collision.collider.CompareTag(Tag.Platform) &&
            SurfaceIsFlat(collision))
        {
            Airbourne(false);
            jumps = 0;
            player.Rigidbody2D().linearVelocityX = 0;
        }
    }

my tilemap game object tag has the value Tag.Platform

and here is my SurfaceIsFlat check

        protected bool SurfaceIsFlat(Collision2D collision)
        {
            return Vector2.Dot(collision.GetContact(0).normal, Vector2.up) > flatSurfaceBounds;
        }

I suspect this has to do with the fact that I am only checking on enter

So if I make contact with the TilemapCollider2D the first time, the OnCollisionEnter2D method does not fire again.

Yup. Thanks rubber ducky!