mapsector.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
#pragma once
 
#include "irrlichttypes.h"
#include "irr_v2d.h"
#include "mapblock.h"
#include <ostream>
#include <map>
#include <vector>
 
class Map;
class IGameDef;
 
/*
        This is an Y-wise stack of MapBlocks.
*/
 
#define MAPSECTOR_SERVER 0
#define MAPSECTOR_CLIENT 1
 
class MapSector
{
public:
 
        MapSector(Map *parent, v2s16 pos, IGameDef *gamedef);
        virtual ~MapSector();
 
        void deleteBlocks();
 
        v2s16 getPos() const
        {
                return m_pos;
        }
 
        MapBlock *getBlockNoCreateNoEx(s16 y);
        std::unique_ptr<MapBlock> createBlankBlockNoInsert(s16 y);
        MapBlock *createBlankBlock(s16 y);
 
        void insertBlock(std::unique_ptr<MapBlock> block);
 
        void deleteBlock(MapBlock *block);
 
        // Remove a block from the map and the sector without deleting it
        // Returns an owning ptr to block.
        std::unique_ptr<MapBlock> detachBlock(MapBlock *block);
 
        // This makes a copy of the internal collection.
        // Prefer getBlocks() if possible.
        void getBlocks(MapBlockVect &dest);
 
        // Get access to the internal collection
        // This is explicitly only allowed on a const object since modifying anything while iterating is unsafe.
        // The caller needs to make sure that this does not happen.
        const auto &getBlocks() const { return m_blocks; }
        const auto &getBlocks() = delete;
 
        bool empty() const { return m_blocks.empty(); }
 
        int size() const { return m_blocks.size(); }
protected:
 
        // The pile of MapBlocks
        std::unordered_map<s16, std::unique_ptr<MapBlock>> m_blocks;
 
        Map *m_parent;
        // Position on parent (in MapBlock widths)
        v2s16 m_pos;
 
        IGameDef *m_gamedef;
 
        // Last-used block is cached here for quicker access.
        // Be sure to set this to nullptr when the cached block is deleted
        MapBlock *m_block_cache = nullptr;
        s16 m_block_cache_y;
 
        /*
                Private methods
        */
        MapBlock *getBlockBuffered(s16 y);
 
};