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Function component in field

Posted June 9, 2017 at 05:10 by kindle
Updated June 9, 2017 at 13:05 by kindle

On the explaination of laplacianFoam
This is extracted from the blog dyfluid.com.

Code:
volVectorField gradT(fvc::grad(T));//创建gradT场,其值为fvc::grad(T),即为T显性离散的值          
volScalarField gradTx        
(             IOobject             
              ("gradTx",
                 runTime.timeName(),
                 DimensionedFieldmesh,
                 IOobject::NO_READ,
                 IOobject::AUTO_WRITE
              ),
             gradT.component(vector::X)         
);//创建gradTx场,其值为矢量gradT的x的值
Function component is defined in class GeometricField.H (but in class GeometricBoudnaryField). It takes a
Code:
 const direction
and return a component typed GeometricField.

Well, since it is declared in GeometricBoudnaryField (not really class GeometricField). Let's see the mother class of GeometricField which is DimensionedField and she has a function component which does practically the same thing except that a DimensionedField is returned instead of GeometricField.

So, going back to the construction of object gradTx. I found one constructor corresponding to what is written above
Code:
        //- Construct as copy resetting IO parameters
        GeometricField
        (
            const IOobject&,
            const GeometricField<Type, PatchField, GeoMesh>&
        );
Is it legal to pass a mother class object to son class by reference ?

Maybe this one explains https://manski.net/2012/02/cpp-refer...d-inheritance/
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