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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Sample/Particle/PolyhedralUtil.cpp
//! @brief Implements class interface IFormfactor.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#include "Sample/Particle/PolyhedralUtil.h"
#include "Base/Type/Span.h"
#include "Base/Util/Assert.h"
#include "Base/Vector/RotMatrix.h"
#include "Sample/Scattering/Rotations.h"
Span PolyhedralUtil::spanZ(const std::vector<R3>& vertices, const IRotation* rotation)
{
ASSERT(!vertices.empty());
const R3& v0 = vertices[0];
double z0 = (rotation ? rotation->transformed(v0) : v0).z();
Span result(z0, z0);
for (size_t i = 1; i < vertices.size(); ++i) {
const R3& v = vertices[i];
ASSERT(std::isfinite(v.x()));
ASSERT(std::isfinite(v.y()));
ASSERT(std::isfinite(v.z()));
double zi = (rotation ? rotation->transformed(v) : v).z();
ASSERT(std::isfinite(zi));
result = Span::unite(result, Span(zi, zi));
}
return result;
}
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