quarterCosineRampI.H

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#include "quarterCosineRamp.H"
#include "mathematicalConstants.H"

// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

inline Foam::scalar Foam::Function1s::quarterCosineRamp::value
(
    const scalar t
) const
{
    return 1 - cos(constant::mathematical::piByTwo*linearRamp(t));
}


inline Foam::scalar Foam::Function1s::quarterCosineRamp::integral
(
    const scalar t1,
    const scalar t2
) const
{
    using namespace constant::mathematical;

    const scalar l1 = linearRamp(t1), l2 = linearRamp(t2);

    return
        (l2 - l1 - (sin(piByTwo*l2) - sin(piByTwo*l1))/piByTwo)/dLinearRampDt()
      + (t2 - min(t2, end()));
}


// ************************************************************************* //