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GenericFunctions
src
Theta.cc
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// -*- C++ -*-
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// $Id:
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#include "
CLHEP/GenericFunctions/Theta.hh
"
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#include "
CLHEP/GenericFunctions/FixedConstant.hh
"
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#include <stdexcept>
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namespace
Genfun {
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FUNCTION_OBJECT_IMP
(Theta)
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Theta
::
Theta
()
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{}
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Theta::~Theta
() {
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}
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Theta::Theta
(
const
Theta
& right) :
AbsFunction
(right)
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{ }
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double
Theta::operator()
(
double
x)
const
{
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return
(x>=0) ? 1.0:0.0;
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}
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Derivative
Theta::partial
(
unsigned
int
index)
const
{
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if
(index!=0)
throw
std::runtime_error(
"Theta::Partial: index out of range"
);
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const
AbsFunction
& fPrime =
FixedConstant
(0.0);
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return
Derivative
(& fPrime);
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}
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}
// namespace Genfun
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