82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
#pragma once
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#include <vector>
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#include <memory>
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#include <unordered_map>
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#include "math.hpp"
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#include "map.hpp"
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namespace pathfinder {
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using Path = std::vector<WorldPos>;
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enum class PathFinderType {
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LINEAR = 1,
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BFS,
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DIJKSTRA,
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COUNT,
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};
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class PathFinderBase {
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public:
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PathFinderBase(const Map* m);
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~PathFinderBase() = default;
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PathFinderBase(const PathFinderBase&) = delete;
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PathFinderBase(PathFinderBase&&) = delete;
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PathFinderBase& operator=(const PathFinderBase&) = delete;
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PathFinderBase& operator=(PathFinderBase&&) = delete;
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virtual const std::string_view& GetName() const = 0;
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virtual Path CalculatePath(WorldPos start, WorldPos end) = 0;
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protected:
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const Map* m_Map;
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};
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class LinearPathFinder : public PathFinderBase {
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public:
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LinearPathFinder(const Map* m): PathFinderBase(m) {}
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Path CalculatePath(WorldPos start, WorldPos end) override;
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const std::string_view& GetName() const override { return m_Name; }
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private:
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const std::string_view m_Name = "Linear Path";
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};
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class BFS: public PathFinderBase {
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public:
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BFS(const Map* m): PathFinderBase(m) {}
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Path CalculatePath(WorldPos start, WorldPos end) override;
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const std::string_view& GetName() const override { return m_Name; }
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private:
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const std::string_view m_Name = "Breadth First Search";
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std::unordered_map<TilePos, double, TilePosHash> m_Distance;
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std::unordered_map<TilePos, TilePos, TilePosHash> m_CameFrom;
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};
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class Dijkstra: public PathFinderBase {
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public:
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Dijkstra(const Map* m): PathFinderBase(m) {}
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Path CalculatePath(WorldPos start, WorldPos end) override;
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const std::string_view& GetName() const override { return m_Name; }
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private:
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const std::string_view m_Name = "Dijkstra's Algorithm";
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std::unordered_map<TilePos, double, TilePosHash> m_Cost;
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std::unordered_map<TilePos, TilePos, TilePosHash> m_CameFrom;
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};
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std::unique_ptr<PathFinderBase> create(PathFinderType type, const Map* map);
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} // pathfinder namespace
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