minetest/src/mapgen.cpp

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/*
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Minetest
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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"
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#include "mg_biome.h"
#include "mapblock.h"
#include "mapnode.h"
#include "map.h"
#include "content_sao.h"
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#include "nodedef.h"
#include "emerge.h"
#include "content_mapnode.h" // For content_mapnode_get_new_name
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#include "voxelalgorithms.h"
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#include "porting.h"
#include "profiler.h"
#include "settings.h"
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#include "treegen.h"
#include "serialization.h"
#include "util/serialize.h"
#include "util/numeric.h"
#include "filesys.h"
#include "log.h"
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;
}
// Returns -MAP_GENERATION_LIMIT if not found
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 >= ymin) ? y : -MAP_GENERATION_LIMIT;
}
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);
heightmap[index] = y;
}
}
//printf("updateHeightmap: %dus\n", t.stop());
}
void Mapgen::updateLiquid(UniqueQueue<v3s16> *trans_liquid, v3s16 nmin, v3s16 nmax)
{
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bool isliquid, wasliquid;
v3s16 em = vm->m_area.getExtent();
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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);
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for (s16 y = nmax.Y; y >= nmin.Y; y--) {
isliquid = ndef->get(vm->m_data[i]).isLiquid();
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// there was a change between liquid and nonliquid, add to queue.
if (isliquid != wasliquid)
trans_liquid->push_back(v3s16(x, y, z));
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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)
{
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enum LightBank banks[2] = {LIGHTBANK_DAY, LIGHTBANK_NIGHT};
VoxelArea a(nmin, nmax);
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bool block_is_underground = (water_level > nmax.Y);
bool sunlight = !block_is_underground;
ScopeProfiler sp(g_profiler, "EmergeThread: mapgen lighting update", SPT_AVG);
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for (int i = 0; i < 2; i++) {
enum LightBank bank = banks[i];
std::set<v3s16> light_sources;
std::map<v3s16, u8> unlight_from;
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voxalgo::clearLightAndCollectSources(*vm, a, bank, ndef,
light_sources, unlight_from);
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voxalgo::propagateSunlight(*vm, a, sunlight, light_sources, ndef);
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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();
}
///////////////////////////////////////////////////////////////////////////////
ObjDefManager::ObjDefManager(IGameDef *gamedef, ObjDefType type)
{
m_objtype = type;
m_ndef = gamedef->getNodeDefManager();
}
ObjDefManager::~ObjDefManager()
{
for (size_t i = 0; i != m_objects.size(); i++)
delete m_objects[i];
}
ObjDefHandle ObjDefManager::add(ObjDef *obj)
{
assert(obj);
if (obj->name.length() && getByName(obj->name))
return OBJDEF_INVALID_HANDLE;
u32 index = addRaw(obj);
if (index == OBJDEF_INVALID_INDEX)
return OBJDEF_INVALID_HANDLE;
obj->handle = createHandle(index, m_objtype, obj->uid);
return obj->handle;
}
ObjDef *ObjDefManager::get(ObjDefHandle handle) const
{
u32 index = validateHandle(handle);
return (index != OBJDEF_INVALID_INDEX) ? getRaw(index) : NULL;
}
ObjDef *ObjDefManager::set(ObjDefHandle handle, ObjDef *obj)
{
u32 index = validateHandle(handle);
return (index != OBJDEF_INVALID_INDEX) ? setRaw(index, obj) : NULL;
}
u32 ObjDefManager::addRaw(ObjDef *obj)
{
size_t nobjects = m_objects.size();
if (nobjects >= OBJDEF_MAX_ITEMS)
return -1;
obj->index = nobjects;
// Ensure UID is nonzero so that a valid handle == OBJDEF_INVALID_HANDLE
// is not possible. The slight randomness bias isn't very significant.
obj->uid = myrand() & OBJDEF_UID_MASK;
if (obj->uid == 0)
obj->uid = 1;
m_objects.push_back(obj);
infostream << "ObjDefManager: added " << getObjectTitle()
<< ": name=\"" << obj->name
<< "\" index=" << obj->index
<< " uid=" << obj->uid
<< std::endl;
return nobjects;
}
ObjDef *ObjDefManager::getRaw(u32 index) const
{
return m_objects[index];
}
ObjDef *ObjDefManager::setRaw(u32 index, ObjDef *obj)
{
ObjDef *old_obj = m_objects[index];
m_objects[index] = obj;
return old_obj;
}
ObjDef *ObjDefManager::getByName(const std::string &name) const
{
for (size_t i = 0; i != m_objects.size(); i++) {
ObjDef *obj = m_objects[i];
if (obj && !strcasecmp(name.c_str(), obj->name.c_str()))
return obj;
}
return NULL;
}
void ObjDefManager::clear()
{
for (size_t i = 0; i != m_objects.size(); i++)
delete m_objects[i];
m_objects.clear();
}
u32 ObjDefManager::validateHandle(ObjDefHandle handle) const
{
ObjDefType type;
u32 index;
u32 uid;
bool is_valid =
(handle != OBJDEF_INVALID_HANDLE) &&
decodeHandle(handle, &index, &type, &uid) &&
(type == m_objtype) &&
(index < m_objects.size()) &&
(m_objects[index]->uid == uid);
return is_valid ? index : -1;
}
ObjDefHandle ObjDefManager::createHandle(u32 index, ObjDefType type, u32 uid)
{
ObjDefHandle handle = 0;
set_bits(&handle, 0, 18, index);
set_bits(&handle, 18, 6, type);
set_bits(&handle, 24, 7, uid);
u32 parity = calc_parity(handle);
set_bits(&handle, 31, 1, parity);
return handle ^ OBJDEF_HANDLE_SALT;
}
bool ObjDefManager::decodeHandle(ObjDefHandle handle, u32 *index,
ObjDefType *type, u32 *uid)
{
handle ^= OBJDEF_HANDLE_SALT;
u32 parity = get_bits(handle, 31, 1);
set_bits(&handle, 31, 1, 0);
if (parity != calc_parity(handle))
return false;
*index = get_bits(handle, 0, 18);
*type = (ObjDefType)get_bits(handle, 18, 6);
*uid = get_bits(handle, 24, 7);
return true;
}
///////////////////////////////////////////////////////////////////////////////
void MapgenParams::load(const Settings &settings)
{
std::string seed_str;
const char *seed_name = (&settings == g_settings) ? "fixed_map_seed" : "seed";
if (settings.getNoEx(seed_name, seed_str) && !seed_str.empty())
seed = read_seed(seed_str.c_str());
else
myrand_bytes(&seed, sizeof(seed));
settings.getNoEx("mg_name", mg_name);
settings.getS16NoEx("water_level", water_level);
settings.getS16NoEx("chunksize", chunksize);
settings.getFlagStrNoEx("mg_flags", flags, flagdesc_mapgen);
settings.getNoiseParams("mg_biome_np_heat", np_biome_heat);
settings.getNoiseParams("mg_biome_np_humidity", np_biome_humidity);
delete sparams;
sparams = EmergeManager::createMapgenParams(mg_name);
if (sparams)
sparams->readParams(&settings);
}
void MapgenParams::save(Settings &settings) const
{
settings.set("mg_name", mg_name);
settings.setU64("seed", seed);
settings.setS16("water_level", water_level);
settings.setS16("chunksize", chunksize);
settings.setFlagStr("mg_flags", flags, flagdesc_mapgen, (u32)-1);
settings.setNoiseParams("mg_biome_np_heat", np_biome_heat);
settings.setNoiseParams("mg_biome_np_humidity", np_biome_humidity);
if (sparams)
sparams->writeParams(&settings);
}