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/*
* Copyright (C) 2007-2025 by the Widelands Development Team
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*
*/
#include "logic/mapdifferenceregion.h"
#include "base/wexception.h"
namespace Widelands {
template <> bool MapDifferenceRegion<Area<FCoords>>::advance(const Map& map) {
assert(1 <= direction_);
assert(direction_ <= 6);
if (remaining_in_edge_ != 0u) {
map.get_neighbour(area_, direction_, &area_);
--remaining_in_edge_;
return true;
}
if (!passed_corner_) {
passed_corner_ = true;
--direction_;
if (direction_ == 0u) {
direction_ = 6;
}
remaining_in_edge_ = area_.radius;
return advance(map);
}
return false;
}
} // namespace Widelands
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