Box2D.Collision.Distance.Simplex.GetSearchDirection C# (CSharp) Метод

            public void GetSearchDirection(Vec2 result)
            {
                switch (Count)
                {

                    case 1:
                        result.Set(m_v1.W).NegateLocal();
                        return;

                    case 2:
                        e12.Set(m_v2.W).SubLocal(m_v1.W);
                        // use out for a temp variable real quick
                        result.Set(m_v1.W).NegateLocal();
                        float sgn = Vec2.Cross(e12, result);

                        if (sgn > 0f)
                        {
                            // Origin is left of e12.
                            Vec2.CrossToOutUnsafe(1f, e12, result);
                            return;
                        }
                        else
                        {
                            // Origin is right of e12.
                            Vec2.CrossToOutUnsafe(e12, 1f, result);
                            return;
                        }
                    default:
                        Debug.Assert(false);
                        result.SetZero();
                        return;
                }
            }