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-   -   Calculating the cosine of a Foam::scalar field (http://www.cfd-online.com/Forums/openfoam/84117-calculating-cosine-foam-scalar-field.html)

RoE January 20, 2011 08:58

Calculating the cosine of a Foam::scalar field
 
Hi!

I'm trying to calculate a smoothed Dirac delta function (volScalarField deltaSmooth) from a volScalarField phiLS with the following code:

forAll(deltaSmooth, i)
{
if (mag(phiLS[i])<epsLS.value())
deltaSmooth[i] = (1 + cos(pi*phiLS[i]/epsLS.value()))/(2*epsLS.value());
else
deltaSmooth[i] = 0.0;
}

However, I get the following compilation error:

levelSet.C:88: error: call of overloaded ‘cos(Foam::scalar)’ is ambiguous
/usr/include/bits/mathcalls.h:64: note: candidates are: double cos(double)
/opt/openfoam171/src/OpenFOAM/lnInclude/dimensionedScalar.H:76: note: Foam::dimensionedScalar Foam::cos(const Foam::dimensionedScalar&)
/opt/openfoam171/src/OpenFOAM/lnInclude/Scalar.H:238: note: Foam::doubleScalar Foam::cos(Foam::doubleScalar)
/opt/openfoam171/src/OpenFOAM/lnInclude/Scalar.H:238: note: Foam::floatScalar Foam::cos(Foam::floatScalar)

I also tried phiLS[i].value but without success...

Thanks for any advice!
Roland

MartinB January 20, 2011 09:13

Hi Roland,

try Foam::cos(...) instead of cos(...)

Martin

RoE January 20, 2011 09:15

Hi Martin,

it works!

Thanks a bunch!!
Roland

sleepdeprivation January 20, 2011 09:49

OpenFOAM overloads the cos function. Check namespace issues.
Try Foam::cos(), and then test it to make sure its doing what you want.

I'm not sure why it can't decide if its a doubleScalar or floatScalar, that's usually picked at compile time.


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