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sfan5sfan5
authoredMar 23, 2021
Fix broken BiomeGen abstraction (#11107)
·
5.11.05.5.0
1 parent c9eba84 commit 2da1eee

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9 files changed

+90
-185
lines changed

9 files changed

+90
-185
lines changed
 

‎src/emerge.cpp

+13-3
Original file line numberDiff line numberDiff line change
@@ -113,13 +113,15 @@ EmergeParams::~EmergeParams()
113113
{
114114
infostream << "EmergeParams: destroying " << this << std::endl;
115115
// Delete everything that was cloned on creation of EmergeParams
116+
delete biomegen;
116117
delete biomemgr;
117118
delete oremgr;
118119
delete decomgr;
119120
delete schemmgr;
120121
}
121122

122-
EmergeParams::EmergeParams(EmergeManager *parent, const BiomeManager *biomemgr,
123+
EmergeParams::EmergeParams(EmergeManager *parent, const BiomeGen *biomegen,
124+
const BiomeManager *biomemgr,
123125
const OreManager *oremgr, const DecorationManager *decomgr,
124126
const SchematicManager *schemmgr) :
125127
ndef(parent->ndef),
@@ -129,6 +131,7 @@ EmergeParams::EmergeParams(EmergeManager *parent, const BiomeManager *biomemgr,
129131
biomemgr(biomemgr->clone()), oremgr(oremgr->clone()),
130132
decomgr(decomgr->clone()), schemmgr(schemmgr->clone())
131133
{
134+
this->biomegen = biomegen->clone(this->biomemgr);
132135
}
133136

134137
////
@@ -143,6 +146,10 @@ EmergeManager::EmergeManager(Server *server)
143146
this->decomgr = new DecorationManager(server);
144147
this->schemmgr = new SchematicManager(server);
145148

149+
// initialized later
150+
this->mgparams = nullptr;
151+
this->biomegen = nullptr;
152+
146153
// Note that accesses to this variable are not synchronized.
147154
// This is because the *only* thread ever starting or stopping
148155
// EmergeThreads should be the ServerThread.
@@ -240,9 +247,12 @@ void EmergeManager::initMapgens(MapgenParams *params)
240247

241248
mgparams = params;
242249

250+
v3s16 csize = v3s16(1, 1, 1) * (params->chunksize * MAP_BLOCKSIZE);
251+
biomegen = biomemgr->createBiomeGen(BIOMEGEN_ORIGINAL, params->bparams, csize);
252+
243253
for (u32 i = 0; i != m_threads.size(); i++) {
244-
EmergeParams *p = new EmergeParams(
245-
this, biomemgr, oremgr, decomgr, schemmgr);
254+
EmergeParams *p = new EmergeParams(this, biomegen,
255+
biomemgr, oremgr, decomgr, schemmgr);
246256
infostream << "EmergeManager: Created params " << p
247257
<< " for thread " << i << std::endl;
248258
m_mapgens.push_back(Mapgen::createMapgen(params->mgtype, params, p));

‎src/emerge.h

+6-1
Original file line numberDiff line numberDiff line change
@@ -99,13 +99,15 @@ class EmergeParams {
9999
u32 gen_notify_on;
100100
const std::set<u32> *gen_notify_on_deco_ids; // shared
101101

102+
BiomeGen *biomegen;
102103
BiomeManager *biomemgr;
103104
OreManager *oremgr;
104105
DecorationManager *decomgr;
105106
SchematicManager *schemmgr;
106107

107108
private:
108-
EmergeParams(EmergeManager *parent, const BiomeManager *biomemgr,
109+
EmergeParams(EmergeManager *parent, const BiomeGen *biomegen,
110+
const BiomeManager *biomemgr,
109111
const OreManager *oremgr, const DecorationManager *decomgr,
110112
const SchematicManager *schemmgr);
111113
};
@@ -140,6 +142,8 @@ class EmergeManager {
140142
~EmergeManager();
141143
DISABLE_CLASS_COPY(EmergeManager);
142144

145+
const BiomeGen *getBiomeGen() const { return biomegen; }
146+
143147
// no usage restrictions
144148
const BiomeManager *getBiomeManager() const { return biomemgr; }
145149
const OreManager *getOreManager() const { return oremgr; }
@@ -196,6 +200,7 @@ class EmergeManager {
196200

197201
// Managers of various map generation-related components
198202
// Note that each Mapgen gets a copy(!) of these to work with
203+
BiomeGen *biomegen;
199204
BiomeManager *biomemgr;
200205
OreManager *oremgr;
201206
DecorationManager *decomgr;

‎src/mapgen/mapgen.cpp

+2-2
Original file line numberDiff line numberDiff line change
@@ -595,7 +595,8 @@ MapgenBasic::MapgenBasic(int mapgenid, MapgenParams *params, EmergeParams *emerg
595595
this->heightmap = new s16[csize.X * csize.Z];
596596

597597
//// Initialize biome generator
598-
biomegen = m_bmgr->createBiomeGen(BIOMEGEN_ORIGINAL, params->bparams, csize);
598+
biomegen = emerge->biomegen;
599+
biomegen->assertChunkSize(csize);
599600
biomemap = biomegen->biomemap;
600601

601602
//// Look up some commonly used content
@@ -621,7 +622,6 @@ MapgenBasic::MapgenBasic(int mapgenid, MapgenParams *params, EmergeParams *emerg
621622

622623
MapgenBasic::~MapgenBasic()
623624
{
624-
delete biomegen;
625625
delete []heightmap;
626626

627627
delete m_emerge; // destroying EmergeParams is our responsibility

‎src/mapgen/mapgen_valleys.cpp

+2-1
Original file line numberDiff line numberDiff line change
@@ -57,7 +57,8 @@ FlagDesc flagdesc_mapgen_valleys[] = {
5757
MapgenValleys::MapgenValleys(MapgenValleysParams *params, EmergeParams *emerge)
5858
: MapgenBasic(MAPGEN_VALLEYS, params, emerge)
5959
{
60-
// NOTE: MapgenValleys has a hard dependency on BiomeGenOriginal
60+
FATAL_ERROR_IF(biomegen->getType() != BIOMEGEN_ORIGINAL,
61+
"MapgenValleys has a hard dependency on BiomeGenOriginal");
6162
m_bgen = (BiomeGenOriginal *)biomegen;
6263

6364
spflags = params->spflags;

‎src/mapgen/mg_biome.cpp

+17-73
Original file line numberDiff line numberDiff line change
@@ -101,71 +101,6 @@ BiomeManager *BiomeManager::clone() const
101101
return mgr;
102102
}
103103

104-
105-
// For BiomeGen type 'BiomeGenOriginal'
106-
float BiomeManager::getHeatAtPosOriginal(v3s16 pos, NoiseParams &np_heat,
107-
NoiseParams &np_heat_blend, u64 seed) const
108-
{
109-
return
110-
NoisePerlin2D(&np_heat, pos.X, pos.Z, seed) +
111-
NoisePerlin2D(&np_heat_blend, pos.X, pos.Z, seed);
112-
}
113-
114-
115-
// For BiomeGen type 'BiomeGenOriginal'
116-
float BiomeManager::getHumidityAtPosOriginal(v3s16 pos, NoiseParams &np_humidity,
117-
NoiseParams &np_humidity_blend, u64 seed) const
118-
{
119-
return
120-
NoisePerlin2D(&np_humidity, pos.X, pos.Z, seed) +
121-
NoisePerlin2D(&np_humidity_blend, pos.X, pos.Z, seed);
122-
}
123-
124-
125-
// For BiomeGen type 'BiomeGenOriginal'
126-
const Biome *BiomeManager::getBiomeFromNoiseOriginal(float heat,
127-
float humidity, v3s16 pos) const
128-
{
129-
Biome *biome_closest = nullptr;
130-
Biome *biome_closest_blend = nullptr;
131-
float dist_min = FLT_MAX;
132-
float dist_min_blend = FLT_MAX;
133-
134-
for (size_t i = 1; i < getNumObjects(); i++) {
135-
Biome *b = (Biome *)getRaw(i);
136-
if (!b ||
137-
pos.Y < b->min_pos.Y || pos.Y > b->max_pos.Y + b->vertical_blend ||
138-
pos.X < b->min_pos.X || pos.X > b->max_pos.X ||
139-
pos.Z < b->min_pos.Z || pos.Z > b->max_pos.Z)
140-
continue;
141-
142-
float d_heat = heat - b->heat_point;
143-
float d_humidity = humidity - b->humidity_point;
144-
float dist = (d_heat * d_heat) + (d_humidity * d_humidity);
145-
146-
if (pos.Y <= b->max_pos.Y) { // Within y limits of biome b
147-
if (dist < dist_min) {
148-
dist_min = dist;
149-
biome_closest = b;
150-
}
151-
} else if (dist < dist_min_blend) { // Blend area above biome b
152-
dist_min_blend = dist;
153-
biome_closest_blend = b;
154-
}
155-
}
156-
157-
const u64 seed = pos.Y + (heat + humidity) * 0.9f;
158-
PcgRandom rng(seed);
159-
160-
if (biome_closest_blend && dist_min_blend <= dist_min &&
161-
rng.range(0, biome_closest_blend->vertical_blend) >=
162-
pos.Y - biome_closest_blend->max_pos.Y)
163-
return biome_closest_blend;
164-
165-
return (biome_closest) ? biome_closest : (Biome *)getRaw(BIOME_NONE);
166-
}
167-
168-
169104
////////////////////////////////////////////////////////////////////////////////
170105

171106
void BiomeParamsOriginal::readParams(const Settings *settings)
@@ -189,7 +124,7 @@ void BiomeParamsOriginal::writeParams(Settings *settings) const
189124
////////////////////////////////////////////////////////////////////////////////
190125

191126
BiomeGenOriginal::BiomeGenOriginal(BiomeManager *biomemgr,
192-
BiomeParamsOriginal *params, v3s16 chunksize)
127+
const BiomeParamsOriginal *params, v3s16 chunksize)
193128
{
194129
m_bmgr = biomemgr;
195130
m_params = params;
@@ -224,17 +159,26 @@ BiomeGenOriginal::~BiomeGenOriginal()
224159
delete noise_humidity_blend;
225160
}
226161

227-
// Only usable in a mapgen thread
228-
Biome *BiomeGenOriginal::calcBiomeAtPoint(v3s16 pos) const
162+
BiomeGen *BiomeGenOriginal::clone(BiomeManager *biomemgr) const
163+
{
164+
return new BiomeGenOriginal(biomemgr, m_params, m_csize);
165+
}
166+
167+
float BiomeGenOriginal::calcHeatAtPoint(v3s16 pos) const
229168
{
230-
float heat =
231-
NoisePerlin2D(&m_params->np_heat, pos.X, pos.Z, m_params->seed) +
169+
return NoisePerlin2D(&m_params->np_heat, pos.X, pos.Z, m_params->seed) +
232170
NoisePerlin2D(&m_params->np_heat_blend, pos.X, pos.Z, m_params->seed);
233-
float humidity =
234-
NoisePerlin2D(&m_params->np_humidity, pos.X, pos.Z, m_params->seed) +
171+
}
172+
173+
float BiomeGenOriginal::calcHumidityAtPoint(v3s16 pos) const
174+
{
175+
return NoisePerlin2D(&m_params->np_humidity, pos.X, pos.Z, m_params->seed) +
235176
NoisePerlin2D(&m_params->np_humidity_blend, pos.X, pos.Z, m_params->seed);
177+
}
236178

237-
return calcBiomeFromNoise(heat, humidity, pos);
179+
Biome *BiomeGenOriginal::calcBiomeAtPoint(v3s16 pos) const
180+
{
181+
return calcBiomeFromNoise(calcHeatAtPoint(pos), calcHumidityAtPoint(pos), pos);
238182
}
239183

240184

‎src/mapgen/mg_biome.h

+17-10
Original file line numberDiff line numberDiff line change
@@ -97,6 +97,15 @@ class BiomeGen {
9797

9898
virtual BiomeGenType getType() const = 0;
9999

100+
// Clone this BiomeGen and set a the new BiomeManager to be used by the copy
101+
virtual BiomeGen *clone(BiomeManager *biomemgr) const = 0;
102+
103+
// Check that the internal chunk size is what the mapgen expects, just to be sure.
104+
inline void assertChunkSize(v3s16 expect) const
105+
{
106+
FATAL_ERROR_IF(m_csize != expect, "Chunk size mismatches");
107+
}
108+
100109
// Calculates the biome at the exact position provided. This function can
101110
// be called at any time, but may be less efficient than the latter methods,
102111
// depending on implementation.
@@ -158,12 +167,18 @@ struct BiomeParamsOriginal : public BiomeParams {
158167
class BiomeGenOriginal : public BiomeGen {
159168
public:
160169
BiomeGenOriginal(BiomeManager *biomemgr,
161-
BiomeParamsOriginal *params, v3s16 chunksize);
170+
const BiomeParamsOriginal *params, v3s16 chunksize);
162171
virtual ~BiomeGenOriginal();
163172

164173
BiomeGenType getType() const { return BIOMEGEN_ORIGINAL; }
165174

175+
BiomeGen *clone(BiomeManager *biomemgr) const;
176+
177+
// Slower, meant for Script API use
178+
float calcHeatAtPoint(v3s16 pos) const;
179+
float calcHumidityAtPoint(v3s16 pos) const;
166180
Biome *calcBiomeAtPoint(v3s16 pos) const;
181+
167182
void calcBiomeNoise(v3s16 pmin);
168183

169184
biome_t *getBiomes(s16 *heightmap, v3s16 pmin);
@@ -176,7 +191,7 @@ class BiomeGenOriginal : public BiomeGen {
176191
float *humidmap;
177192

178193
private:
179-
BiomeParamsOriginal *m_params;
194+
const BiomeParamsOriginal *m_params;
180195

181196
Noise *noise_heat;
182197
Noise *noise_humidity;
@@ -229,14 +244,6 @@ class BiomeManager : public ObjDefManager {
229244

230245
virtual void clear();
231246

232-
// For BiomeGen type 'BiomeGenOriginal'
233-
float getHeatAtPosOriginal(v3s16 pos, NoiseParams &np_heat,
234-
NoiseParams &np_heat_blend, u64 seed) const;
235-
float getHumidityAtPosOriginal(v3s16 pos, NoiseParams &np_humidity,
236-
NoiseParams &np_humidity_blend, u64 seed) const;
237-
const Biome *getBiomeFromNoiseOriginal(float heat, float humidity,
238-
v3s16 pos) const;
239-
240247
private:
241248
BiomeManager() {};
242249

‎src/noise.cpp

+3-3
Original file line numberDiff line numberDiff line change
@@ -369,7 +369,7 @@ float contour(float v)
369369
///////////////////////// [ New noise ] ////////////////////////////
370370

371371

372-
float NoisePerlin2D(NoiseParams *np, float x, float y, s32 seed)
372+
float NoisePerlin2D(const NoiseParams *np, float x, float y, s32 seed)
373373
{
374374
float a = 0;
375375
float f = 1.0;
@@ -395,7 +395,7 @@ float NoisePerlin2D(NoiseParams *np, float x, float y, s32 seed)
395395
}
396396

397397

398-
float NoisePerlin3D(NoiseParams *np, float x, float y, float z, s32 seed)
398+
float NoisePerlin3D(const NoiseParams *np, float x, float y, float z, s32 seed)
399399
{
400400
float a = 0;
401401
float f = 1.0;
@@ -422,7 +422,7 @@ float NoisePerlin3D(NoiseParams *np, float x, float y, float z, s32 seed)
422422
}
423423

424424

425-
Noise::Noise(NoiseParams *np_, s32 seed, u32 sx, u32 sy, u32 sz)
425+
Noise::Noise(const NoiseParams *np_, s32 seed, u32 sx, u32 sy, u32 sz)
426426
{
427427
np = *np_;
428428
this->seed = seed;

‎src/noise.h

+3-3
Original file line numberDiff line numberDiff line change
@@ -146,7 +146,7 @@ class Noise {
146146
float *persist_buf = nullptr;
147147
float *result = nullptr;
148148

149-
Noise(NoiseParams *np, s32 seed, u32 sx, u32 sy, u32 sz=1);
149+
Noise(const NoiseParams *np, s32 seed, u32 sx, u32 sy, u32 sz=1);
150150
~Noise();
151151

152152
void setSize(u32 sx, u32 sy, u32 sz=1);
@@ -192,8 +192,8 @@ class Noise {
192192

193193
};
194194

195-
float NoisePerlin2D(NoiseParams *np, float x, float y, s32 seed);
196-
float NoisePerlin3D(NoiseParams *np, float x, float y, float z, s32 seed);
195+
float NoisePerlin2D(const NoiseParams *np, float x, float y, s32 seed);
196+
float NoisePerlin3D(const NoiseParams *np, float x, float y, float z, s32 seed);
197197

198198
inline float NoisePerlin2D_PO(NoiseParams *np, float x, float xoff,
199199
float y, float yoff, s32 seed)

‎src/script/lua_api/l_mapgen.cpp

+27-89
Original file line numberDiff line numberDiff line change
@@ -482,9 +482,7 @@ int ModApiMapgen::l_get_biome_id(lua_State *L)
482482
{
483483
NO_MAP_LOCK_REQUIRED;
484484

485-
const char *biome_str = lua_tostring(L, 1);
486-
if (!biome_str)
487-
return 0;
485+
const char *biome_str = luaL_checkstring(L, 1);
488486

489487
const BiomeManager *bmgr = getServer(L)->getEmergeManager()->getBiomeManager();
490488
if (!bmgr)
@@ -527,30 +525,12 @@ int ModApiMapgen::l_get_heat(lua_State *L)
527525

528526
v3s16 pos = read_v3s16(L, 1);
529527

530-
NoiseParams np_heat;
531-
NoiseParams np_heat_blend;
532-
533-
MapSettingsManager *settingsmgr =
534-
getServer(L)->getEmergeManager()->map_settings_mgr;
528+
const BiomeGen *biomegen = getServer(L)->getEmergeManager()->getBiomeGen();
535529

536-
if (!settingsmgr->getMapSettingNoiseParams("mg_biome_np_heat",
537-
&np_heat) ||
538-
!settingsmgr->getMapSettingNoiseParams("mg_biome_np_heat_blend",
539-
&np_heat_blend))
540-
return 0;
541-
542-
std::string value;
543-
if (!settingsmgr->getMapSetting("seed", &value))
544-
return 0;
545-
std::istringstream ss(value);
546-
u64 seed;
547-
ss >> seed;
548-
549-
const BiomeManager *bmgr = getServer(L)->getEmergeManager()->getBiomeManager();
550-
if (!bmgr)
530+
if (!biomegen || biomegen->getType() != BIOMEGEN_ORIGINAL)
551531
return 0;
552532

553-
float heat = bmgr->getHeatAtPosOriginal(pos, np_heat, np_heat_blend, seed);
533+
float heat = ((BiomeGenOriginal*) biomegen)->calcHeatAtPoint(pos);
554534

555535
lua_pushnumber(L, heat);
556536

@@ -566,31 +546,12 @@ int ModApiMapgen::l_get_humidity(lua_State *L)
566546

567547
v3s16 pos = read_v3s16(L, 1);
568548

569-
NoiseParams np_humidity;
570-
NoiseParams np_humidity_blend;
571-
572-
MapSettingsManager *settingsmgr =
573-
getServer(L)->getEmergeManager()->map_settings_mgr;
549+
const BiomeGen *biomegen = getServer(L)->getEmergeManager()->getBiomeGen();
574550

575-
if (!settingsmgr->getMapSettingNoiseParams("mg_biome_np_humidity",
576-
&np_humidity) ||
577-
!settingsmgr->getMapSettingNoiseParams("mg_biome_np_humidity_blend",
578-
&np_humidity_blend))
551+
if (!biomegen || biomegen->getType() != BIOMEGEN_ORIGINAL)
579552
return 0;
580553

581-
std::string value;
582-
if (!settingsmgr->getMapSetting("seed", &value))
583-
return 0;
584-
std::istringstream ss(value);
585-
u64 seed;
586-
ss >> seed;
587-
588-
const BiomeManager *bmgr = getServer(L)->getEmergeManager()->getBiomeManager();
589-
if (!bmgr)
590-
return 0;
591-
592-
float humidity = bmgr->getHumidityAtPosOriginal(pos, np_humidity,
593-
np_humidity_blend, seed);
554+
float humidity = ((BiomeGenOriginal*) biomegen)->calcHumidityAtPoint(pos);
594555

595556
lua_pushnumber(L, humidity);
596557

@@ -606,45 +567,11 @@ int ModApiMapgen::l_get_biome_data(lua_State *L)
606567

607568
v3s16 pos = read_v3s16(L, 1);
608569

609-
NoiseParams np_heat;
610-
NoiseParams np_heat_blend;
611-
NoiseParams np_humidity;
612-
NoiseParams np_humidity_blend;
613-
614-
MapSettingsManager *settingsmgr =
615-
getServer(L)->getEmergeManager()->map_settings_mgr;
616-
617-
if (!settingsmgr->getMapSettingNoiseParams("mg_biome_np_heat",
618-
&np_heat) ||
619-
!settingsmgr->getMapSettingNoiseParams("mg_biome_np_heat_blend",
620-
&np_heat_blend) ||
621-
!settingsmgr->getMapSettingNoiseParams("mg_biome_np_humidity",
622-
&np_humidity) ||
623-
!settingsmgr->getMapSettingNoiseParams("mg_biome_np_humidity_blend",
624-
&np_humidity_blend))
570+
const BiomeGen *biomegen = getServer(L)->getEmergeManager()->getBiomeGen();
571+
if (!biomegen)
625572
return 0;
626573

627-
std::string value;
628-
if (!settingsmgr->getMapSetting("seed", &value))
629-
return 0;
630-
std::istringstream ss(value);
631-
u64 seed;
632-
ss >> seed;
633-
634-
const BiomeManager *bmgr = getServer(L)->getEmergeManager()->getBiomeManager();
635-
if (!bmgr)
636-
return 0;
637-
638-
float heat = bmgr->getHeatAtPosOriginal(pos, np_heat, np_heat_blend, seed);
639-
if (!heat)
640-
return 0;
641-
642-
float humidity = bmgr->getHumidityAtPosOriginal(pos, np_humidity,
643-
np_humidity_blend, seed);
644-
if (!humidity)
645-
return 0;
646-
647-
const Biome *biome = bmgr->getBiomeFromNoiseOriginal(heat, humidity, pos);
574+
const Biome *biome = biomegen->calcBiomeAtPoint(pos);
648575
if (!biome || biome->index == OBJDEF_INVALID_INDEX)
649576
return 0;
650577

@@ -653,11 +580,16 @@ int ModApiMapgen::l_get_biome_data(lua_State *L)
653580
lua_pushinteger(L, biome->index);
654581
lua_setfield(L, -2, "biome");
655582

656-
lua_pushnumber(L, heat);
657-
lua_setfield(L, -2, "heat");
583+
if (biomegen->getType() == BIOMEGEN_ORIGINAL) {
584+
float heat = ((BiomeGenOriginal*) biomegen)->calcHeatAtPoint(pos);
585+
float humidity = ((BiomeGenOriginal*) biomegen)->calcHumidityAtPoint(pos);
658586

659-
lua_pushnumber(L, humidity);
660-
lua_setfield(L, -2, "humidity");
587+
lua_pushnumber(L, heat);
588+
lua_setfield(L, -2, "heat");
589+
590+
lua_pushnumber(L, humidity);
591+
lua_setfield(L, -2, "humidity");
592+
}
661593

662594
return 1;
663595
}
@@ -1493,9 +1425,12 @@ int ModApiMapgen::l_generate_ores(lua_State *L)
14931425
NO_MAP_LOCK_REQUIRED;
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EmergeManager *emerge = getServer(L)->getEmergeManager();
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if (!emerge || !emerge->mgparams)
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return 0;
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Mapgen mg;
1498-
mg.seed = emerge->mgparams->seed;
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// Intentionally truncates to s32, see Mapgen::Mapgen()
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mg.seed = (s32)emerge->mgparams->seed;
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mg.vm = LuaVoxelManip::checkobject(L, 1)->vm;
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mg.ndef = getServer(L)->getNodeDefManager();
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@@ -1519,9 +1454,12 @@ int ModApiMapgen::l_generate_decorations(lua_State *L)
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NO_MAP_LOCK_REQUIRED;
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EmergeManager *emerge = getServer(L)->getEmergeManager();
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if (!emerge || !emerge->mgparams)
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return 0;
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Mapgen mg;
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mg.seed = emerge->mgparams->seed;
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// Intentionally truncates to s32, see Mapgen::Mapgen()
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mg.seed = (s32)emerge->mgparams->seed;
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mg.vm = LuaVoxelManip::checkobject(L, 1)->vm;
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mg.ndef = getServer(L)->getNodeDefManager();
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