Seminar_Cable_Joints_Unity/Assets/Extensions.cs

using UnityEngine;

public static class Extensions
{
    public static ComponentA GetOrAddComponent<ComponentA>(this GameObject gameObject)
        where ComponentA : Component {

        ComponentA result = gameObject.GetComponent<ComponentA>();
        return result == null ? gameObject.AddComponent<ComponentA>() : result;
    }

    public static Vector2 Position2d(this Transform t) {
        Vector3 pos = t.position;
        return new Vector2(pos.x, pos.y);
    }

    public static float ActualDistanceInWorld(this DistanceJoint2D dist) {
        return (dist.transform.TransformPoint(dist.anchor) -
                dist.connectedBody.transform.TransformPoint(dist.connectedAnchor)).magnitude;
    }
}