public CartesianVectorField(CartesianScalarField xComp, CartesianScalarField yComp, CartesianScalarField zComp)
 {
     X = xComp;
     Y = yComp;
     Z = zComp;
 }
 public CartesianVectorField(CartesianScalarField xComp, CartesianScalarField yComp, CartesianScalarField zComp)
 {
     X = xComp;
     Y = yComp;
     Z = zComp;
 }