CSGNPolygonUnit.h

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//* This file is part of the MOOSE framework
//* https://www.mooseframework.org
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#pragma once

#ifdef MOOSE_UNIT_TEST
#include "gtest/gtest.h"
#endif

#include "CSGSurfaceEngUnit.h"

namespace CSG
{

class CSGBase;

class CSGNPolygonUnit : public CSGSurfaceEngUnit
{
public:
  CSGNPolygonUnit(const std::string & name, int n_sides, Real apothem);

  Real evaluateSurfaceEquationAtPoint(const Point & p) const override;

  std::unordered_map<std::string, AttributeVariant> getAttributes() const override;

  // helper getter functions to get additional polygon dimensions/attributes

  int getNumSides() { return _n_sides; }

  Real getApothem() { return _apothem; }

  Real getSideLength() { return 2.0 * _apothem * std::tan(M_PI / _n_sides); }

  Real getRadius() { return _apothem / (std::cos(M_PI / _n_sides)); }

protected:
  std::unique_ptr<CSGSurface> clone() const override
  {
    return std::make_unique<CSGNPolygonUnit>(_name, _n_sides, _apothem);
  }

  void expandUnit() override;

private:
  const int _n_sides;

  const Real _apothem;

  std::vector<const CSGSurface *> _planes;

#ifdef MOOSE_UNIT_TEST
  FRIEND_TEST(CSGEngUnitTest, testPolygonUnitExpansion);
  FRIEND_TEST(CSGEngUnitTest, testPolygonUnitClone);
#endif
};

} // namespace CSG