public bool Equals(NVec2 nvec2)
        {
            if (nvec2 == null)
            {
                return false;
            }

            if(ReferenceEquals(this, nvec2))
            {
                return true;
            }

            return ((this.x == nvec2.x) && (this.y == nvec2.y));
        }
 public NVec2(NVec2 nvec2)
 {
     this.x = nvec2.x;
     this.y = nvec2.y;
 }