index : minetest.git	gpcf lifo-fixes release
	modified minetest for gpcfs purposes	gpcf

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	Commit message (Expand)	Author	Age
*	Translated using Weblate (Russian)	Andrey K	2016-05-30
*	Translated using Weblate (Russian)	Sergey	2016-05-30
*	Translated using Weblate (Russian)	Vasily Pavlov	2016-05-30
*	Run updatepo.sh	est31	2016-05-05
*	Translated using Weblate (Russian)	Stas Kies	2016-05-01
*	Translated using Weblate (Russian)	Pavel Sokolov	2016-05-01
*	Translated using Weblate (Russian)	Anton Tsyganenko	2016-05-01
*	Translated using Weblate (Russian)	Alex “XShell” Schekoldin	2016-05-01
*	Translated using Weblate (Russian)	Stas Kies	2016-05-01
*	Update po files, minetest.conf.example and settings_translation_file.cpp	est31	2016-02-27
*	Translated using Weblate (Russian)	Dmitry Smirnov	2016-02-27
*	Translated using Weblate (Russian)	Vasily Pavlov	2016-02-27
*	Translated using Weblate (Russian)	Anton Tsyganenko	2015-12-21
*	Run util/updatepo.sh	est31	2015-11-08
*	Russian translation: remove weird char	est31	2015-11-08
*	Translated using Weblate (Russian)	Vasily Pavlov	2015-11-08
*	Translated using Weblate (Russian)	Pavel Sokolov	2015-11-08
*	Translated using Weblate (Russian)	Vasily Pavlov	2015-11-08
*	Translated using Weblate (Russian)	Pavel Sokolov	2015-11-08
*	Translated using Weblate (Russian)	Vasily Pavlov	2015-11-08
*	Translated using Weblate (Russian)	Maksim D. Gamarnik	2015-11-08
*	Translated using Weblate (Russian)	Pavel Sokolov	2015-11-08
*	Translated using Weblate (Russian)	Maksim D. Gamarnik	2015-11-08
*	Translated using Weblate (Russian)	Pavel Sokolov	2015-11-08
*	Run updatepo.sh	est31	2015-10-24
*	Run updatepo.sh	est31	2015-09-12
*	Translated using Weblate (Russian)	Alex “XShell” Schekoldin	2015-09-12
*	Translated using Weblate (Russian)	Alex “XShell” Schekoldin	2015-09-12
*	Translated using Weblate (Russian)	Andrey K	2015-08-09
*	Run updatepo.sh	est31	2015-07-17
*	Revert "Update Russian translation"	Kahrl	2014-12-13
*	Update po files	ShadowNinja	2014-12-12
*	Update Russian translation	AntonBoch1244	2014-12-12
*	Translated using Weblate (Russian)	Сергей Голубев	2014-02-16
*	Translated using Weblate (Russian)	Ilya Zhuravlev	2014-02-16
*	Run updatepo.sh	PilzAdam	2013-11-23
*	Translated using Weblate (Russian)	Anton Tsyganenko	2013-11-23
*	Run updatepo.sh	Ilya Zhuravlev	2013-09-08
*	Translated using Weblate (Russian)	Ilya Zhuravlev	2013-08-30
*	Translated using Weblate (Russian)	Anton Tsyganenko	2013-08-30
*	Translated using Weblate (Russian)	Ilya Zhuravlev	2013-08-30
*	Translated using Weblate (Russian)	Anton Tsyganenko	2013-08-30
*	Translated using Weblate (Russian)	Anton Tsyganenko	2013-08-30
*	Translated using Weblate (Russian)	Anton Tsyganenko	2013-08-30
*	Translated using Weblate (Russian)	Anton Tsyganenko	2013-08-30
*	Run util/updatepo.sh	PilzAdam	2013-08-25
*	Translated using Weblate (Russian)	Anton Tsyganenko	2013-08-25
*	Translated using Weblate (Russian)	Vladimir a	2013-08-25
*	Fix i18n of some strings.	arsdragonfly	2013-07-02
*	Update po files	PilzAdam	2013-05-13

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generated by cgit v1.2.3 (git 2.39.1) at 2025-01-26 04:18:12 +0000

/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "mapgen.h"
#include "voxel.h"
#include "noise.h"
#include "gamedef.h"
#include "mg_biome.h"
#include "mapblock.h"
#include "mapnode.h"
#include "map.h"
#include "content_sao.h"
#include "nodedef.h"
#include "emerge.h"
#include "content_mapnode.h" // For content_mapnode_get_new_name
#include "voxelalgorithms.h"
#include "profiler.h"
#include "settings.h" // For g_settings
#include "main.h" // For g_profiler
#include "treegen.h"
#include "serialization.h"
#include "util/serialize.h"
#include "filesys.h"
#include "log.h"

const char *GenElementManager::ELEMENT_TITLE = "element";

FlagDesc flagdesc_mapgen[] = {
	{"trees",    MG_TREES},
	{"caves",    MG_CAVES},
	{"dungeons", MG_DUNGEONS},
	{"flat",     MG_FLAT},
	{"light",    MG_LIGHT},
	{NULL,       0}
};

FlagDesc flagdesc_gennotify[] = {
	{"dungeon",          1 << GENNOTIFY_DUNGEON},
	{"temple",           1 << GENNOTIFY_TEMPLE},
	{"cave_begin",       1 << GENNOTIFY_CAVE_BEGIN},
	{"cave_end",         1 << GENNOTIFY_CAVE_END},
	{"large_cave_begin", 1 << GENNOTIFY_LARGECAVE_BEGIN},
	{"large_cave_end",   1 << GENNOTIFY_LARGECAVE_END},
	{"decoration",       1 << GENNOTIFY_DECORATION},
	{NULL,               0}
};


///////////////////////////////////////////////////////////////////////////////

Mapgen::Mapgen()
{
	generating    = false;
	id            = -1;
	seed          = 0;
	water_level   = 0;
	flags         = 0;

	vm          = NULL;
	ndef        = NULL;
	heightmap   = NULL;
	biomemap    = NULL;
}


Mapgen::Mapgen(int mapgenid, MapgenParams *params, EmergeManager *emerge) :
	gennotify(emerge->gen_notify_on, &emerge->gen_notify_on_deco_ids)
{
	generating    = false;
	id            = mapgenid;
	seed          = (int)params->seed;
	water_level   = params->water_level;
	flags         = params->flags;
	csize         = v3s16(1, 1, 1) * (params->chunksize * MAP_BLOCKSIZE);

	vm        = NULL;
	ndef      = NULL;
	heightmap = NULL;
	biomemap  = NULL;
}


Mapgen::~Mapgen()
{
}


u32 Mapgen::getBlockSeed(v3s16 p, int seed)
{
	return (u32)seed   +
		p.Z * 38134234 +
		p.Y * 42123    +
		p.X * 23;
}


u32 Mapgen::getBlockSeed2(v3s16 p, int seed)
{
	u32 n = 1619 * p.X + 31337 * p.Y + 52591 * p.Z + 1013 * seed;
	n = (n >> 13) ^ n;
	return (n * (n * n * 60493 + 19990303) + 1376312589);
}


// Returns Y one under area minimum if not found
s16 Mapgen::findGroundLevelFull(v2s16 p2d)
{
	v3s16 em = vm->m_area.getExtent();
	s16 y_nodes_max = vm->m_area.MaxEdge.Y;
	s16 y_nodes_min = vm->m_area.MinEdge.Y;
	u32 i = vm->m_area.index(p2d.X, y_nodes_max, p2d.Y);
	s16 y;

	for (y = y_nodes_max; y >= y_nodes_min; y--) {
		MapNode &n = vm->m_data[i];
		if (ndef->get(n).walkable)
			break;

		vm->m_area.add_y(em, i, -1);
	}
	return (y >= y_nodes_min) ? y : y_nodes_min - 1;
}


s16 Mapgen::findGroundLevel(v2s16 p2d, s16 ymin, s16 ymax)
{
	v3s16 em = vm->m_area.getExtent();
	u32 i = vm->m_area.index(p2d.X, ymax, p2d.Y);
	s16 y;

	for (y = ymax; y >= ymin; y--) {
		MapNode &n = vm->m_data[i];
		if (ndef->get(n).walkable)
			break;

		vm->m_area.add_y(em, i, -1);
	}
	return y;
}


void Mapgen::updateHeightmap(v3s16 nmin, v3s16 nmax)
{
	if (!heightmap)
		return;

	//TimeTaker t("Mapgen::updateHeightmap", NULL, PRECISION_MICRO);
	int index = 0;
	for (s16 z = nmin.Z; z <= nmax.Z; z++) {
		for (s16 x = nmin.X; x <= nmax.X; x++, index++) {
			s16 y = findGroundLevel(v2s16(x, z), nmin.Y, nmax.Y);

			// if the values found are out of range, trust the old heightmap
			if (y == nmax.Y && heightmap[index] > nmax.Y)
				continue;
			if (y == nmin.Y - 1 && heightmap[index] < nmin.Y)
				continue;

			heightmap[index] = y;
		}
	}
	//printf("updateHeightmap: %dus\n", t.stop());
}


void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax)
{
	bool isliquid, wasliquid;
	v3s16 em  = vm->m_area.getExtent();

	for (s16 z = nmin.Z; z <= nmax.Z; z++) {
		for (s16 x = nmin.X; x <= nmax.X; x++) {
			wasliquid = true;

			u32 i = vm->m_area.index(x, nmax.Y, z);
			for (s16 y = nmax.Y; y >= nmin.Y; y--) {
				isliquid = ndef->get(vm->m_data[i]).isLiquid();

				// there was a change between liquid and nonliquid, add to queue.
				if (isliquid != wasliquid)
					trans_liquid->push_back(v3s16(x, y, z));

				wasliquid = isliquid;
				vm->m_area.add_y(em, i, -1);
			}
		}
	}
}


void Mapgen::setLighting(u8 light, v3s16 nmin, v3s16 nmax)
{
	ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
	VoxelArea a(nmin, nmax);

	for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
		for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
			u32 i = vm->m_area.index(a.MinEdge.X, y, z);
			for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++)
				vm->m_data[i].param1 = light;
		}
	}
}


void Mapgen::lightSpread(VoxelArea &a, v3s16 p, u8 light)
{
	if (light <= 1 || !a.contains(p))
		return;

	u32 vi = vm->m_area.index(p);
	MapNode &nn = vm->m_data[vi];

	light--;
	// should probably compare masked, but doesn't seem to make a difference
	if (light <= nn.param1 || !ndef->get(nn).light_propagates)
		return;

	nn.param1 = light;

	lightSpread(a, p + v3s16(0, 0, 1), light);
	lightSpread(a, p + v3s16(0, 1, 0), light);
	lightSpread(a, p + v3s16(1, 0, 0), light);
	lightSpread(a, p - v3s16(0, 0, 1), light);
	lightSpread(a, p - v3s16(0, 1, 0), light);
	lightSpread(a, p - v3s16(1, 0, 0), light);
}


void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax, v3s16 full_nmin, v3s16 full_nmax)
{
	ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
	//TimeTaker t("updateLighting");

	propagateSunlight(nmin, nmax);
	spreadLight(full_nmin, full_nmax);

	//printf("updateLighting: %dms\n", t.stop());
}



void Mapgen::calcLighting(v3s16 nmin, v3s16 nmax)
{
	ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
	//TimeTaker t("updateLighting");

	propagateSunlight(
		nmin - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
		nmax + v3s16(1, 0, 1) * MAP_BLOCKSIZE);

	spreadLight(
		nmin - v3s16(1, 1, 1) * MAP_BLOCKSIZE,
		nmax + v3s16(1, 1, 1) * MAP_BLOCKSIZE);

	//printf("updateLighting: %dms\n", t.stop());
}


void Mapgen::propagateSunlight(v3s16 nmin, v3s16 nmax)
{
	//TimeTaker t("propagateSunlight");
	VoxelArea a(nmin, nmax);
	bool block_is_underground = (water_level >= nmax.Y);
	v3s16 em = vm->m_area.getExtent();

	for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
		for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++) {
			// see if we can get a light value from the overtop
			u32 i = vm->m_area.index(x, a.MaxEdge.Y + 1, z);
			if (vm->m_data[i].getContent() == CONTENT_IGNORE) {
				if (block_is_underground)
					continue;
			} else if ((vm->m_data[i].param1 & 0x0F) != LIGHT_SUN) {
				continue;
			}
			vm->m_area.add_y(em, i, -1);

			for (int y = a.MaxEdge.Y; y >= a.MinEdge.Y; y--) {
				MapNode &n = vm->m_data[i];
				if (!ndef->get(n).sunlight_propagates)
					break;
				n.param1 = LIGHT_SUN;
				vm->m_area.add_y(em, i, -1);
			}
		}
	}
	//printf("propagateSunlight: %dms\n", t.stop());
}



void Mapgen::spreadLight(v3s16 nmin, v3s16 nmax)
{
	//TimeTaker t("spreadLight");
	VoxelArea a(nmin, nmax);

	for (int z = a.MinEdge.Z; z <= a.MaxEdge.Z; z++) {
		for (int y = a.MinEdge.Y; y <= a.MaxEdge.Y; y++) {
			u32 i = vm->m_area.index(a.MinEdge.X, y, z);
			for (int x = a.MinEdge.X; x <= a.MaxEdge.X; x++, i++) {
				MapNode &n = vm->m_data[i];
				if (n.getContent() == CONTENT_IGNORE ||
					!ndef->get(n).light_propagates)
					continue;

				u8 light_produced = ndef->get(n).light_source & 0x0F;
				if (light_produced)
					n.param1 = light_produced;

				u8 light = n.param1 & 0x0F;
				if (light) {
					lightSpread(a, v3s16(x,     y,     z + 1), light);
					lightSpread(a, v3s16(x,     y + 1, z    ), light);
					lightSpread(a, v3s16(x + 1, y,     z    ), light);
					lightSpread(a, v3s16(x,     y,     z - 1), light);
					lightSpread(a, v3s16(x,     y - 1, z    ), light);
					lightSpread(a, v3s16(x - 1, y,     z    ), light);
				}
			}
		}
	}

	//printf("spreadLight: %dms\n", t.stop());
}



void Mapgen::calcLightingOld(v3s16 nmin, v3s16 nmax)
{
	enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
	VoxelArea a(nmin, nmax);
	bool block_is_underground = (water_level > nmax.Y);
	bool sunlight = !block_is_underground;

	ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);

	for (int i = 0; i < 2; i++) {
		enum LightBank bank = banks[i];
		std::set<v3s16> light_sources;
		std::map<v3s16, u8> unlight_from;

		voxalgo::clearLightAndCollectSources(*vm, a, bank, ndef,
			light_sources, unlight_from);
		voxalgo::propagateSunlight(*vm, a, sunlight, light_sources, ndef);

		vm->unspreadLight(bank, unlight_from, light_sources, ndef);
		vm->spreadLight(bank, light_sources, ndef);
	}
}


///////////////////////////////////////////////////////////////////////////////

GenerateNotifier::GenerateNotifier()
{
	m_notify_on = 0;
}


GenerateNotifier::GenerateNotifier(u32 notify_on,
	std::set<u32> *notify_on_deco_ids)
{
	m_notify_on = notify_on;
	m_notify_on_deco_ids = notify_on_deco_ids;
}


void GenerateNotifier::setNotifyOn(u32 notify_on)
{
	m_notify_on = notify_on;
}


void GenerateNotifier::setNotifyOnDecoIds(std::set<u32> *notify_on_deco_ids)
{
	m_notify_on_deco_ids = notify_on_deco_ids;
}


bool GenerateNotifier::addEvent(GenNotifyType type, v3s16 pos, u32 id)
{
	if (!(m_notify_on & (1 << type)))
		return false;

	if (type == GENNOTIFY_DECORATION &&
		m_notify_on_deco_ids->find(id) == m_notify_on_deco_ids->end())
		return false;

	GenNotifyEvent gne;
	gne.type = type;
	gne.pos  = pos;
	gne.id   = id;
	m_notify_events.push_back(gne);

	return true;
}


void GenerateNotifier::getEvents(
	std::map<std::string, std::vector<v3s16> > &event_map,
	bool peek_events)
{
	std::list<GenNotifyEvent>::iterator it;

	for (it = m_notify_events.begin(); it != m_notify_events.end(); ++it) {
		GenNotifyEvent &gn = *it;
		std::string name = (gn.type == GENNOTIFY_DECORATION) ?
			"decoration#"+ itos(gn.id) :
			flagdesc_gennotify[gn.type].name;

		event_map[name].push_back(gn.pos);
	}

	if (!peek_events)
		m_notify_events.clear();
}


///////////////////////////////////////////////////////////////////////////////


GenElementManager::GenElementManager(IGameDef *gamedef)
{
	m_ndef = gamedef->getNodeDefManager();
}


GenElementManager::~GenElementManager()
{
	for (size_t i = 0; i != m_elements.size(); i++)
		delete m_elements[i];
}


u32 GenElementManager::add(GenElement *elem)
{
	size_t nelem = m_elements.size();

	for (size_t i = 0; i != nelem; i++) {
		if (m_elements[i] == NULL) {
			elem->id = i;
			m_elements[i] = elem;
			return i;
		}
	}

	if (nelem >= this->ELEMENT_LIMIT)
		return -1;

	elem->id = nelem;
	m_elements.push_back(elem);

	verbosestream << "GenElementManager: added " << this->ELEMENT_TITLE
		<< " element '" << elem->name << "'" << std::endl;

	return nelem;
}


GenElement *GenElementManager::get(u32 id)
{
	return (id < m_elements.size()) ? m_elements[id] : NULL;
}


GenElement *GenElementManager::getByName(const std::string &name)
{
	for (size_t i = 0; i != m_elements.size(); i++) {
		GenElement *elem = m_elements[i];
		if (elem && name == elem->name)
			return elem;
	}

	return NULL;
}


GenElement *GenElementManager::update(u32 id, GenElement *elem)
{
	if (id >= m_elements.size())
		return NULL;

	GenElement *old_elem = m_elements[id];
	m_elements[id] = elem;
	return old_elem;
}


GenElement *GenElementManager::remove(u32 id)
{
	return update(id, NULL);
}


void GenElementManager::clear()
{
	m_elements.clear();
}