Initial commit.

src/MultilevelAStarEx.h

@@ -0,0 +1,85 @@
+#ifndef MultilevelAStarEx_H
+#define MultilevelAStarEx_H
+
+#include <gdextension_interface.h>
+#include <godot_cpp/classes/ref.hpp>
+#include <godot_cpp/variant/array.hpp>
+#include <godot_cpp/variant/vector2i.hpp>
+
+#include <vector>
+
+namespace godot {
+
+class Node {
+	friend class MultilevelAStarEx;
+
+public:
+	enum NodeState
+	{
+		UNUSED, OPEN, CLOSED
+	};
+
+private:
+	NodeState state;
+	int x, y;
+
+	Node* parent;
+	int distanceFromStart;
+	int distanceToEnd;
+
+	int distanceToEndForClosest;
+
+	Node(int x, int y);
+	void init(Node* parent, int distanceFromStart, const Vector2i &end);
+	int total_cost() const;
+
+public:
+	Node();
+};
+
+class MultilevelAStarEx : public RefCounted
+{
+	GDCLASS(MultilevelAStarEx, RefCounted)
+
+public:
+	enum TerrainType
+	{
+		STAIRS = -1,
+		BLOCKED = 0,
+		GROUND = 1,
+	};
+
+private:
+	bool _init;
+	std::vector<TerrainType> _terrain;
+	std::vector<bool> _units;
+	std::vector<Node> _nodes;
+
+	Rect2i _region;
+	Vector2i _trans;
+	int _width, _height;
+
+	bool can_move(const Node* current, int x, int y) const;
+	TypedArray<Vector2i> generate_path(const Node* current) const;
+
+protected:
+	static void _bind_methods();
+
+public:
+	MultilevelAStarEx();
+	~MultilevelAStarEx();
+
+	void init(const Rect2i &region);
+	Rect2i get_region() const;
+	void set_terrain(const Vector2i &cell, TerrainType type);
+	TerrainType get_terrain(const Vector2i &cell) const;
+	void set_unit(const Vector2i &cell, bool blocked);
+	bool get_unit(const Vector2i &cell) const;
+	Variant find_path(const Vector2i &from, const Vector2i &to, const bool return_closest);
+};
+
+}
+
+VARIANT_ENUM_CAST(MultilevelAStarEx::TerrainType);
+
+#endif