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/* SPDX-License-Identifier: GPL-2.0-or-later */
#pragma once
/** \file
* \ingroup freestyle
* \brief Class gathering stroke creation algorithms
*/
#include <string>
#include "AdvancedFunctions1D.h"
#include "Predicates1D.h"
#include "../view_map/Interface1D.h"
//
// Predicates definitions
//
///////////////////////////////////////////////////////////
namespace Freestyle {
namespace Predicates1D {
// DensityLowerThanUP1D
/** Returns true if the density evaluated for the
* Interface1D is less than a user-defined density value.
*/
class DensityLowerThanUP1D : public UnaryPredicate1D {
public:
/** Builds the functor.
* \param threshold:
* The value of the threshold density.
* Any Interface1D having a density lower than this threshold will match.
* \param sigma:
* The sigma value defining the density evaluation window size used in the DensityF0D functor.
*/
DensityLowerThanUP1D(double threshold, double sigma = 2)
{
_threshold = threshold;
_sigma = sigma;
}
/** Returns the string "DensityLowerThanUP1D" */
string getName() const
{
return "DensityLowerThanUP1D";
}
/** The () operator. */
int operator()(Interface1D &inter)
{
Functions1D::DensityF1D fun(_sigma);
if (fun(inter) < 0) {
return -1;
}
result = (fun.result < _threshold);
return 0;
}
private:
double _sigma;
double _threshold;
};
} // end of namespace Predicates1D
} /* namespace Freestyle */
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