1 /*
2 Minetest
3 Copyright (C) 2016 MillersMan <millersman@users.noreply.github.com>
4 
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
9 
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 GNU Lesser General Public License for more details.
14 
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19 
20 #pragma once
21 
22 #include "util/container.h"
23 #include "irrlichttypes_bloated.h"
24 
25 class NodeDefManager;
26 class Map;
27 class MapBlock;
28 
29 class ReflowScan {
30 public:
31 	ReflowScan(Map *map, const NodeDefManager *ndef);
32 	void scan(MapBlock *block, UniqueQueue<v3s16> *liquid_queue);
33 
34 private:
35 	MapBlock *lookupBlock(int x, int y, int z);
36 	bool isLiquidFlowableTo(int x, int y, int z);
37 	bool isLiquidHorizontallyFlowable(int x, int y, int z);
38 	void scanColumn(int x, int z);
39 
40 private:
41 	Map *m_map = nullptr;
42 	const NodeDefManager *m_ndef = nullptr;
43 	v3s16 m_block_pos, m_rel_block_pos;
44 	UniqueQueue<v3s16> *m_liquid_queue = nullptr;
45 	MapBlock *m_lookup[3 * 3 * 3];
46 	u32 m_lookup_state_bitset;
47 };
48