[bieshuxuhe]

hello !
in the volFieldsFwd.H , there is:
typedef GeometricField<scalar, fvPatchField, volMesh> volScalarField;

there are two "scalar" which are defined in the "scalar.H" as follows:

36 #ifndef scalar_H
37 #define scalar_H
38 
39 #include "floatScalar.H"
40 #include "doubleScalar.H"
41 
42 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
43 
44 #if defined(WM_SP)
45 
46 // Define scalar as a float
47 
48 namespace Foam
49 {
50  typedef floatScalar scalar;
51 
52  static const scalar GREAT = floatScalarGREAT;
53  static const scalar VGREAT = floatScalarVGREAT;
54  static const scalar ROOTVGREAT = floatScalarROOTVGREAT;
55  static const scalar SMALL = floatScalarSMALL;
56  static const scalar VSMALL = floatScalarVSMALL;
57  static const scalar ROOTVSMALL = floatScalarROOTVSMALL;
58 
59  scalar readScalar(Istream& is);
60 }
61 
62 #elif defined(WM_DP)
63 
64 // Define scalar as a double
65 
66 namespace Foam
67 {
68  typedef doubleScalar scalar;
69 
70  static const scalar GREAT = doubleScalarGREAT;
71  static const scalar VGREAT = doubleScalarVGREAT;
72  static const scalar ROOTVGREAT = doubleScalarROOTVGREAT;
73  static const scalar SMALL = doubleScalarSMALL;
74  static const scalar VSMALL = doubleScalarVSMALL;
75  static const scalar ROOTVSMALL = doubleScalarROOTVSMALL;
76 
77  scalar readScalar(Istream& is);
78 }
79 
80 #endif
81 
82 
83 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
84 
85 #endif
86 
87 // ************************************************************************* //

I don't find any WM_SP or WM_DP is defined in the openfoam source code.
Then I wonder which scalar is adopted when we use volScalarField to declare "p" in the "createFields.H" ? for example :
volScalarField p
(
IOobject
(
"p",
runTime.timeName(),
mesh,
IOobject::MUST_READ,
IOobject::AUTO_WRITE
),
mesh
);


the floatScalar or the doubleScalar ? could you help me ?
Thanks ！

[alexeym]

Hi,

it is passed to the compiler like:

Making dependency list for source file aFile.C
SOURCE=aFile.C ;  g++ -m64 -Dlinux64 -DWM_DP -Wall -Wextra -Wno-unu ...

it is defined in etc/bashrc

#    WM_PRECISION_OPTION = DP | SP
export WM_PRECISION_OPTION=DP

[bieshuxuhe]

Thank you !!!