Unity 5.2 - Moving character bumps between 2D edge colliders

Question

I'm creating a fast-paced, 2D side-scrolling game on Unity 5.2, building my terrain out of discrete "blocks", each with its own EdgeCollider2D component.

Having a problem where my character gets bumped upward as it crosses from one block to another (imagine driving your car over a speed bump on the road).

This doesn't happen all the time. Seems to be random, which is even more irritating, as it makes finding a solution more difficult.

I've tried all of the suggestions that I could find for similar questions on this site, including:

• Using CircleCollider2D's on the character
• making sure the terrain blocks and their corresponding colliders are perfectly aligned. The attached screenshot shows one of the intersections.
• changing the "Min penetration for penalty" setting to the minimum allowed value (0.0001)
• switching between discrete and continuous collision detection for the character's RigidBody2D
• increasing the mass and gravity scale for the character's RigidBody2D

... to no avail.

Beyond building a single, massive terrain object with a single edge collider from start to finish (which I'm trying to avoid), I've run out of ideas. Anything else I'm missing? Is it just a Unity bug?

Help!

Answer 1

Try detect the collision and set the vertical velocity to zero.

void OnCollisionEnter2D(Collision2D col)
{
    if (col.gameObject.name.StartsWith("block"))
        rigidbody2d.velocity = new Vector2(rigidbody2d.velocity.x, 0);
}