dot method

@override double dot(Vector v)

Implementation

@override
double dot(Vector v) {
  double temp = x * v.x + y * v.y;
  if(v is Vector3){
    temp += z * v.z;
  }
  else if(v is Vector4){
    temp += z * v.z+ w * v.w;
  }
  return temp;
}