46 lines
1.8 KiB
C++
46 lines
1.8 KiB
C++
// Solutions to the Advent Of Code 2024.
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// Copyright (C) 2024 Stefan Müller
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//
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// This program is free software: you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free Software
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// Foundation, either version 3 of the License, or (at your option) any later
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// version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along with
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// this program. If not, see <http://www.gnu.org/licenses/>.
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#pragma once
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#include <vector>
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#include <aoc/Grid.hpp>
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#include <aoc/GridPathData.hpp>
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#include <aoc/LinesSolver.hpp>
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#include <aoc/Point2.hpp>
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class GuardGallivant
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: public LinesSolver
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{
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public:
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virtual const std::string getPuzzleName() const override;
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virtual const std::string getInputFileName() const override;
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virtual void processDataLine(const std::string& line) override;
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virtual void finish() override;
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private:
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Point2 start_{};
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const size_t getStartDirectionIndex() const;
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const char getStartChar() const;
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const char getObstructionChar() const;
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void tracePath();
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void visitPosition(const Point2& current, const size_t directionIndex, Grid<GridPathData>& pathGrid);
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void backtracePath(const Point2& current, const size_t directionIndex, Grid<GridPathData>& pathGrid);
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void backtraceTurn(const Point2& current, const size_t reverseTurnDirectionIndex, Grid<GridPathData>& pathGrid);
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size_t turnDirectionRight(const size_t currentDirectionIndex) const;
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size_t turnDirectionLeft(const size_t currentDirectionIndex) const;
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size_t revertDirection(const size_t currentDirectionIndex) const;
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};
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