reflowscan.h

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// Luanti
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2016 MillersMan <millersman@users.noreply.github.com>
 
#pragma once
 
#include "util/container.h"
#include "irrlichttypes.h"
#include "irr_v3d.h"
 
class NodeDefManager;
class Map;
class MapBlock;
 
class ReflowScan {
public:
        ReflowScan(Map *map, const NodeDefManager *ndef);
        void scan(MapBlock *block, UniqueQueue<v3s16> *liquid_queue);
 
private:
        MapBlock *lookupBlock(int x, int y, int z);
        bool isLiquidFlowableTo(int x, int y, int z);
        bool isLiquidHorizontallyFlowable(int x, int y, int z);
        void scanColumn(int x, int z);
 
private:
        Map *m_map = nullptr;
        const NodeDefManager *m_ndef = nullptr;
        v3s16 m_block_pos, m_rel_block_pos;
        UniqueQueue<v3s16> *m_liquid_queue = nullptr;
        MapBlock *m_lookup[3 * 3 * 3];
        u32 m_lookup_state_bitset;
};