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//-----------------------------------------------------------------------------
/** @file libpentobi_base/TrigonGeometry.h
@author Markus Enzenberger
@copyright GNU General Public License version 3 or later */
//-----------------------------------------------------------------------------
#ifndef LIBPENTOBI_BASE_TRIGON_GEOMETRY_H
#define LIBPENTOBI_BASE_TRIGON_GEOMETRY_H
#include "Geometry.h"
namespace libpentobi_base {
//-----------------------------------------------------------------------------
/** Geometry as used in the game Blokus Trigon.
The board is a hexagon consisting of triangles. The coordinates are like
in this example of a hexagon with edge size 3:
<tt>
0 1 2 3 4 5 6 7 8 9 10
0 / \ / \ / \ / \
1 / \ / \ / \ / \ / \
2 / \ / \ / \ / \ / \ / \
3 \ / \ / \ / \ / \ / \ /
4 \ / \ / \ / \ / \ /
5 \ / \ / \ / \ /
</tt>
There are two point types: 0=upward triangle, 1=downward triangle. */
class TrigonGeometry final
: public Geometry
{
public:
/** Create or reuse an already created geometry with a given size.
@param sz The edge size of the hexagon. */
static const TrigonGeometry& get(unsigned sz);
explicit TrigonGeometry(unsigned sz);
AdjCoordList get_adj_coord(int x, int y) const override;
DiagCoordList get_diag_coord(int x, int y) const override;
unsigned get_point_type(int x, int y) const override;
unsigned get_period_x() const override;
unsigned get_period_y() const override;
protected:
bool init_is_onboard(unsigned x, unsigned y) const override;
private:
unsigned m_sz;
};
//-----------------------------------------------------------------------------
} // namespace libpentobi_base
#endif // LIBPENTOBI_BASE_TRIGON_GEOMETRY_H
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