CircularHarmonicFunc.cc

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// vi: set ts=2 noet:
//
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/// @file src/core/scoring/constraints/CircularHarmonicFunc.cc
/// @brief Definition for functions used in definition of constraints.
/// @author James Thompson

#include <core/scoring/constraints/CircularHarmonicFunc.hh>
#include <numeric/angle.functions.hh>
#include <core/types.hh>

#include <iostream>

namespace core {
namespace scoring {
namespace constraints {

Real
CircularHarmonicFunc::func( Real const x ) const {
  Real const z = ( numeric::nearest_angle_radians(x,x0_)-x0_ )/sd_;
  return z * z + offset_;
}

Real
CircularHarmonicFunc::dfunc( Real const x ) const {
  return 2 * ( numeric::nearest_angle_radians(x,x0_)-x0_ ) / ( sd_ * sd_ );
}

void
CircularHarmonicFunc::read_data( std::istream & in ) {
  in >> x0_ >> sd_;
}

void CircularHarmonicFunc::show_definition( std::ostream & out ) const
{
  out << "CircularHarmonicFunc " << x0_ << ' ' << sd_;
}

} // namespace constraints
} // namespace scoring
} // namespace core