/*************************************************************************/
/*  portal_pvs_builder.h                                                 */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
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#ifndef PORTAL_PVS_BUILDER_H
#define PORTAL_PVS_BUILDER_H

#include "core/bitfield_dynamic.h"
#include "core/local_vector.h"
#include "core/math/plane.h"

//#define GODOT_PVS_SUPPORT_SAVE_FILE

class PortalRenderer;
class PVS;

class PVSBuilder {
	struct Neighbours {
		LocalVector<int32_t, int32_t> room_ids;
	};

public:
	void calculate_pvs(PortalRenderer &p_portal_renderer, String p_filename, int p_depth_limit);

private:
#ifdef GODOT_PVS_SUPPORT_SAVE_FILE
	bool load_pvs(String p_filename);
	void save_pvs(String p_filename);
#endif
	void find_neighbors(LocalVector<Neighbours> &r_neighbors);

	void logd(int p_depth, String p_string);
	void log(String p_string);

	void trace_rooms_recursive(int p_depth, int p_source_room_id, int p_room_id, int p_first_portal_id, bool p_first_portal_outgoing, int p_previous_portal_id, const LocalVector<Plane, int32_t> &p_planes, BitFieldDynamic &r_bitfield_rooms, int p_from_external_room_id = -1);
	void trace_rooms_recursive_simple(int p_depth, int p_source_room_id, int p_room_id, int p_first_portal_id, bool p_first_portal_outgoing, int p_previous_portal_id, const LocalVector<Plane, int32_t> &p_planes, BitFieldDynamic &r_bitfield_rooms);

	void create_secondary_pvs(int p_room_id, const LocalVector<Neighbours> &p_neighbors, BitFieldDynamic &r_bitfield_rooms);

	PortalRenderer *_portal_renderer = nullptr;
	PVS *_pvs = nullptr;
	int _depth_limit = 16;
	Vector3 _trace_start_point;

	static bool _log_active;
};

#endif