src/nodedef.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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 #include "nodedef.h"
  21
  22 #include "main.h" // For g_settings
  23 #include "itemdef.h"
  24 #ifndef SERVER
  25 #include "tile.h"
  26 #endif
  27 #include "log.h"
  28 #include "settings.h"
  29 #include "nameidmapping.h"
  30
  31 /*
  32         NodeBox
  33 */
  34
  35 void NodeBox::serialize(std::ostream &os) const
  36 {
  37         writeU8(os, 0); // version
  38         writeU8(os, type);
  39         writeV3F1000(os, fixed.MinEdge);
  40         writeV3F1000(os, fixed.MaxEdge);
  41         writeV3F1000(os, wall_top.MinEdge);
  42         writeV3F1000(os, wall_top.MaxEdge);
  43         writeV3F1000(os, wall_bottom.MinEdge);
  44         writeV3F1000(os, wall_bottom.MaxEdge);
  45         writeV3F1000(os, wall_side.MinEdge);
  46         writeV3F1000(os, wall_side.MaxEdge);
  47 }
  48
  49 void NodeBox::deSerialize(std::istream &is)
  50 {
  51         int version = readU8(is);
  52         if(version != 0)
  53                 throw SerializationError("unsupported NodeBox version");
  54         type = (enum NodeBoxType)readU8(is);
  55         fixed.MinEdge = readV3F1000(is);
  56         fixed.MaxEdge = readV3F1000(is);
  57         wall_top.MinEdge = readV3F1000(is);
  58         wall_top.MaxEdge = readV3F1000(is);
  59         wall_bottom.MinEdge = readV3F1000(is);
  60         wall_bottom.MaxEdge = readV3F1000(is);
  61         wall_side.MinEdge = readV3F1000(is);
  62         wall_side.MaxEdge = readV3F1000(is);
  63 }
  64
  65 /*
  66         MaterialSpec
  67 */
  68
  69 void MaterialSpec::serialize(std::ostream &os) const
  70 {
  71         os<<serializeString(tname);
  72         writeU8(os, backface_culling);
  73 }
  74
  75 void MaterialSpec::deSerialize(std::istream &is)
  76 {
  77         tname = deSerializeString(is);
  78         backface_culling = readU8(is);
  79 }
  80
  81 /*
  82         SimpleSoundSpec serialization
  83 */
  84
  85 static void serializeSimpleSoundSpec(const SimpleSoundSpec &ss,
  86                 std::ostream &os)
  87 {
  88         os<<serializeString(ss.name);
  89         writeF1000(os, ss.gain);
  90 }
  91 static void deSerializeSimpleSoundSpec(SimpleSoundSpec &ss, std::istream &is)
  92 {
  93         ss.name = deSerializeString(is);
  94         ss.gain = readF1000(is);
  95 }
  96
  97 /*
  98         ContentFeatures
  99 */
 100
 101 ContentFeatures::ContentFeatures()
 102 {
 103         reset();
 104 }
 105
 106 ContentFeatures::~ContentFeatures()
 107 {
 108 }
 109
 110 void ContentFeatures::reset()
 111 {
 112         /*
 113                 Cached stuff
 114         */
 115 #ifndef SERVER
 116         solidness = 2;
 117         visual_solidness = 0;
 118         backface_culling = true;
 119 #endif
 120         /*
 121                 Actual data
 122
 123                 NOTE: Most of this is always overridden by the default values given
 124                       in builtin.lua
 125         */
 126         name = "";
 127         groups.clear();
 128         // Unknown nodes can be dug
 129         groups["dig_immediate"] = 2;
 130         drawtype = NDT_NORMAL;
 131         visual_scale = 1.0;
 132         for(u32 i=0; i<6; i++)
 133                 tname_tiles[i] = "";
 134         for(u16 j=0; j<CF_SPECIAL_COUNT; j++)
 135                 mspec_special[j] = MaterialSpec();
 136         alpha = 255;
 137         post_effect_color = video::SColor(0, 0, 0, 0);
 138         param_type = CPT_NONE;
 139         param_type_2 = CPT2_NONE;
 140         is_ground_content = false;
 141         light_propagates = false;
 142         sunlight_propagates = false;
 143         walkable = true;
 144         pointable = true;
 145         diggable = true;
 146         climbable = false;
 147         buildable_to = false;
 148         metadata_name = "";
 149         liquid_type = LIQUID_NONE;
 150         liquid_alternative_flowing = "";
 151         liquid_alternative_source = "";
 152         liquid_viscosity = 0;
 153         light_source = 0;
 154         damage_per_second = 0;
 155         selection_box = NodeBox();
 156         legacy_facedir_simple = false;
 157         legacy_wallmounted = false;
 158         sound_footstep = SimpleSoundSpec();
 159         sound_dig = SimpleSoundSpec("__group");
 160         sound_dug = SimpleSoundSpec();
 161 }
 162
 163 void ContentFeatures::serialize(std::ostream &os)
 164 {
 165         writeU8(os, 3); // version
 166         os<<serializeString(name);
 167         writeU16(os, groups.size());
 168         for(ItemGroupList::const_iterator
 169                         i = groups.begin(); i != groups.end(); i++){
 170                 os<<serializeString(i->first);
 171                 writeS16(os, i->second);
 172         }
 173         writeU8(os, drawtype);
 174         writeF1000(os, visual_scale);
 175         writeU8(os, 6);
 176         for(u32 i=0; i<6; i++)
 177                 os<<serializeString(tname_tiles[i]);
 178         writeU8(os, CF_SPECIAL_COUNT);
 179         for(u32 i=0; i<CF_SPECIAL_COUNT; i++){
 180                 mspec_special[i].serialize(os);
 181         }
 182         writeU8(os, alpha);
 183         writeU8(os, post_effect_color.getAlpha());
 184         writeU8(os, post_effect_color.getRed());
 185         writeU8(os, post_effect_color.getGreen());
 186         writeU8(os, post_effect_color.getBlue());
 187         writeU8(os, param_type);
 188         writeU8(os, param_type_2);
 189         writeU8(os, is_ground_content);
 190         writeU8(os, light_propagates);
 191         writeU8(os, sunlight_propagates);
 192         writeU8(os, walkable);
 193         writeU8(os, pointable);
 194         writeU8(os, diggable);
 195         writeU8(os, climbable);
 196         writeU8(os, buildable_to);
 197         os<<serializeString(metadata_name);
 198         writeU8(os, liquid_type);
 199         os<<serializeString(liquid_alternative_flowing);
 200         os<<serializeString(liquid_alternative_source);
 201         writeU8(os, liquid_viscosity);
 202         writeU8(os, light_source);
 203         writeU32(os, damage_per_second);
 204         selection_box.serialize(os);
 205         writeU8(os, legacy_facedir_simple);
 206         writeU8(os, legacy_wallmounted);
 207         serializeSimpleSoundSpec(sound_footstep, os);
 208         serializeSimpleSoundSpec(sound_dig, os);
 209         serializeSimpleSoundSpec(sound_dug, os);
 210 }
 211
 212 void ContentFeatures::deSerialize(std::istream &is)
 213 {
 214         int version = readU8(is);
 215         if(version != 3)
 216                 throw SerializationError("unsupported ContentFeatures version");
 217         name = deSerializeString(is);
 218         groups.clear();
 219         u32 groups_size = readU16(is);
 220         for(u32 i=0; i<groups_size; i++){
 221                 std::string name = deSerializeString(is);
 222                 int value = readS16(is);
 223                 groups[name] = value;
 224         }
 225         drawtype = (enum NodeDrawType)readU8(is);
 226         visual_scale = readF1000(is);
 227         if(readU8(is) != 6)
 228                 throw SerializationError("unsupported tile count");
 229         for(u32 i=0; i<6; i++)
 230                 tname_tiles[i] = deSerializeString(is);
 231         if(readU8(is) != CF_SPECIAL_COUNT)
 232                 throw SerializationError("unsupported CF_SPECIAL_COUNT");
 233         for(u32 i=0; i<CF_SPECIAL_COUNT; i++){
 234                 mspec_special[i].deSerialize(is);
 235         }
 236         alpha = readU8(is);
 237         post_effect_color.setAlpha(readU8(is));
 238         post_effect_color.setRed(readU8(is));
 239         post_effect_color.setGreen(readU8(is));
 240         post_effect_color.setBlue(readU8(is));
 241         param_type = (enum ContentParamType)readU8(is);
 242         param_type_2 = (enum ContentParamType2)readU8(is);
 243         is_ground_content = readU8(is);
 244         light_propagates = readU8(is);
 245         sunlight_propagates = readU8(is);
 246         walkable = readU8(is);
 247         pointable = readU8(is);
 248         diggable = readU8(is);
 249         climbable = readU8(is);
 250         buildable_to = readU8(is);
 251         metadata_name = deSerializeString(is);
 252         liquid_type = (enum LiquidType)readU8(is);
 253         liquid_alternative_flowing = deSerializeString(is);
 254         liquid_alternative_source = deSerializeString(is);
 255         liquid_viscosity = readU8(is);
 256         light_source = readU8(is);
 257         damage_per_second = readU32(is);
 258         selection_box.deSerialize(is);
 259         legacy_facedir_simple = readU8(is);
 260         legacy_wallmounted = readU8(is);
 261         // If you add anything here, insert it primarily inside the try-catch
 262         // block to not need to increase the version.
 263         try{
 264                 deSerializeSimpleSoundSpec(sound_footstep, is);
 265                 deSerializeSimpleSoundSpec(sound_dig, is);
 266                 deSerializeSimpleSoundSpec(sound_dug, is);
 267         }catch(SerializationError &e) {};
 268 }
 269
 270 /*
 271         CNodeDefManager
 272 */
 273
 274 class CNodeDefManager: public IWritableNodeDefManager
 275 {
 276 public:
 277         void clear()
 278         {
 279                 m_name_id_mapping.clear();
 280                 m_name_id_mapping_with_aliases.clear();
 281
 282                 for(u16 i=0; i<=MAX_CONTENT; i++)
 283                 {
 284                         ContentFeatures &f = m_content_features[i];
 285                         f.reset(); // Reset to defaults
 286                 }
 287
 288                 // Set CONTENT_AIR
 289                 {
 290                         ContentFeatures f;
 291                         f.name = "air";
 292                         f.drawtype = NDT_AIRLIKE;
 293                         f.param_type = CPT_LIGHT;
 294                         f.light_propagates = true;
 295                         f.sunlight_propagates = true;
 296                         f.walkable = false;
 297                         f.pointable = false;
 298                         f.diggable = false;
 299                         f.buildable_to = true;
 300                         // Insert directly into containers
 301                         content_t c = CONTENT_AIR;
 302                         m_content_features[c] = f;
 303                         addNameIdMapping(c, f.name);
 304                 }
 305                 // Set CONTENT_IGNORE
 306                 {
 307                         ContentFeatures f;
 308                         f.name = "ignore";
 309                         f.drawtype = NDT_AIRLIKE;
 310                         f.param_type = CPT_NONE;
 311                         f.light_propagates = false;
 312                         f.sunlight_propagates = false;
 313                         f.walkable = false;
 314                         f.pointable = false;
 315                         f.diggable = false;
 316                         // A way to remove accidental CONTENT_IGNOREs
 317                         f.buildable_to = true;
 318                         // Insert directly into containers
 319                         content_t c = CONTENT_IGNORE;
 320                         m_content_features[c] = f;
 321                         addNameIdMapping(c, f.name);
 322                 }
 323         }
 324         // CONTENT_IGNORE = not found
 325         content_t getFreeId(bool require_full_param2)
 326         {
 327                 // If allowed, first search in the large 4-bit-param2 pool
 328                 if(!require_full_param2){
 329                         for(u16 i=0x800; i<=0xfff; i++){
 330                                 const ContentFeatures &f = m_content_features[i];
 331                                 if(f.name == "")
 332                                         return i;
 333                         }
 334                 }
 335                 // Then search from the small 8-bit-param2 pool
 336                 for(u16 i=0; i<=125; i++){
 337                         const ContentFeatures &f = m_content_features[i];
 338                         if(f.name == "")
 339                                 return i;
 340                 }
 341                 return CONTENT_IGNORE;
 342         }
 343         CNodeDefManager()
 344         {
 345                 clear();
 346         }
 347         virtual ~CNodeDefManager()
 348         {
 349         }
 350         virtual IWritableNodeDefManager* clone()
 351         {
 352                 CNodeDefManager *mgr = new CNodeDefManager();
 353                 for(u16 i=0; i<=MAX_CONTENT; i++)
 354                 {
 355                         mgr->set(i, get(i));
 356                 }
 357                 return mgr;
 358         }
 359         virtual const ContentFeatures& get(content_t c) const
 360         {
 361                 assert(c <= MAX_CONTENT);
 362                 return m_content_features[c];
 363         }
 364         virtual const ContentFeatures& get(const MapNode &n) const
 365         {
 366                 return get(n.getContent());
 367         }
 368         virtual bool getId(const std::string &name, content_t &result) const
 369         {
 370                 std::map<std::string, content_t>::const_iterator
 371                         i = m_name_id_mapping_with_aliases.find(name);
 372                 if(i == m_name_id_mapping_with_aliases.end())
 373                         return false;
 374                 result = i->second;
 375                 return true;
 376         }
 377         virtual content_t getId(const std::string &name) const
 378         {
 379                 content_t id = CONTENT_IGNORE;
 380                 getId(name, id);
 381                 return id;
 382         }
 383         virtual void getIds(const std::string &name, std::set<content_t> &result)
 384                         const
 385         {
 386                 if(name.substr(0,6) != "group:"){
 387                         content_t id = CONTENT_IGNORE;
 388                         if(getId(name, id))
 389                                 result.insert(id);
 390                         return;
 391                 }
 392                 std::string group = name.substr(6);
 393                 for(u16 id=0; id<=MAX_CONTENT; id++)
 394                 {
 395                         const ContentFeatures &f = m_content_features[id];
 396                         if(f.name == "") // Quickly discard undefined nodes
 397                                 continue;
 398                         if(itemgroup_get(f.groups, group) != 0)
 399                                 result.insert(id);
 400                 }
 401         }
 402         virtual const ContentFeatures& get(const std::string &name) const
 403         {
 404                 content_t id = CONTENT_IGNORE;
 405                 getId(name, id);
 406                 return get(id);
 407         }
 408         // IWritableNodeDefManager
 409         virtual void set(content_t c, const ContentFeatures &def)
 410         {
 411                 verbosestream<<"registerNode: registering content id \""<<c
 412                                 <<"\": name=\""<<def.name<<"\""<<std::endl;
 413                 assert(c <= MAX_CONTENT);
 414                 // Don't allow redefining CONTENT_IGNORE (but allow air)
 415                 if(def.name == "ignore" || c == CONTENT_IGNORE){
 416                         infostream<<"registerNode: WARNING: Ignoring "
 417                                         <<"CONTENT_IGNORE redefinition"<<std::endl;
 418                         return;
 419                 }
 420                 // Check that the special contents are not redefined as different id
 421                 // because it would mess up everything
 422                 if((def.name == "ignore" && c != CONTENT_IGNORE) ||
 423                         (def.name == "air" && c != CONTENT_AIR)){
 424                         errorstream<<"registerNode: IGNORING ERROR: "
 425                                         <<"trying to register built-in type \""
 426                                         <<def.name<<"\" as different id"<<std::endl;
 427                         return;
 428                 }
 429                 m_content_features[c] = def;
 430                 if(def.name != "")
 431                         addNameIdMapping(c, def.name);
 432         }
 433         virtual content_t set(const std::string &name,
 434                         const ContentFeatures &def)
 435         {
 436                 assert(name == def.name);
 437                 u16 id = CONTENT_IGNORE;
 438                 bool found = m_name_id_mapping.getId(name, id);  // ignore aliases
 439                 if(!found){
 440                         // Determine if full param2 is required
 441                         bool require_full_param2 = (
 442                                 def.param_type_2 == CPT2_FULL
 443                                 ||
 444                                 def.param_type_2 == CPT2_FLOWINGLIQUID
 445                                 ||
 446                                 def.legacy_wallmounted
 447                         );
 448                         // Get some id
 449                         id = getFreeId(require_full_param2);
 450                         if(id == CONTENT_IGNORE)
 451                                 return CONTENT_IGNORE;
 452                         if(name != "")
 453                                 addNameIdMapping(id, name);
 454                 }
 455                 set(id, def);
 456                 return id;
 457         }
 458         virtual content_t allocateDummy(const std::string &name)
 459         {
 460                 assert(name != "");
 461                 ContentFeatures f;
 462                 f.name = name;
 463                 return set(name, f);
 464         }
 465         virtual void updateAliases(IItemDefManager *idef)
 466         {
 467                 std::set<std::string> all = idef->getAll();
 468                 m_name_id_mapping_with_aliases.clear();
 469                 for(std::set<std::string>::iterator
 470                                 i = all.begin(); i != all.end(); i++)
 471                 {
 472                         std::string name = *i;
 473                         std::string convert_to = idef->getAlias(name);
 474                         content_t id;
 475                         if(m_name_id_mapping.getId(convert_to, id))
 476                         {
 477                                 m_name_id_mapping_with_aliases.insert(
 478                                                 std::make_pair(name, id));
 479                         }
 480                 }
 481         }
 482         virtual void updateTextures(ITextureSource *tsrc)
 483         {
 484 #ifndef SERVER
 485                 infostream<<"CNodeDefManager::updateTextures(): Updating "
 486                                 <<"textures in node definitions"<<std::endl;
 487
 488                 bool new_style_water = g_settings->getBool("new_style_water");
 489                 bool new_style_leaves = g_settings->getBool("new_style_leaves");
 490                 bool opaque_water = g_settings->getBool("opaque_water");
 491
 492                 for(u16 i=0; i<=MAX_CONTENT; i++)
 493                 {
 494                         ContentFeatures *f = &m_content_features[i];
 495
 496                         std::string tname_tiles[6];
 497                         for(u32 j=0; j<6; j++)
 498                         {
 499                                 tname_tiles[j] = f->tname_tiles[j];
 500                                 if(tname_tiles[j] == "")
 501                                         tname_tiles[j] = "unknown_block.png";
 502                         }
 503
 504                         switch(f->drawtype){
 505                         default:
 506                         case NDT_NORMAL:
 507                                 f->solidness = 2;
 508                                 break;
 509                         case NDT_AIRLIKE:
 510                                 f->solidness = 0;
 511                                 break;
 512                         case NDT_LIQUID:
 513                                 assert(f->liquid_type == LIQUID_SOURCE);
 514                                 if(opaque_water)
 515                                         f->alpha = 255;
 516                                 if(new_style_water){
 517                                         f->solidness = 0;
 518                                 } else {
 519                                         f->solidness = 1;
 520                                         if(f->alpha == 255)
 521                                                 f->solidness = 2;
 522                                         f->backface_culling = false;
 523                                 }
 524                                 break;
 525                         case NDT_FLOWINGLIQUID:
 526                                 assert(f->liquid_type == LIQUID_FLOWING);
 527                                 f->solidness = 0;
 528                                 if(opaque_water)
 529                                         f->alpha = 255;
 530                                 break;
 531                         case NDT_GLASSLIKE:
 532                                 f->solidness = 0;
 533                                 f->visual_solidness = 1;
 534                                 break;
 535                         case NDT_ALLFACES:
 536                                 f->solidness = 0;
 537                                 f->visual_solidness = 1;
 538                                 break;
 539                         case NDT_ALLFACES_OPTIONAL:
 540                                 if(new_style_leaves){
 541                                         f->drawtype = NDT_ALLFACES;
 542                                         f->solidness = 0;
 543                                         f->visual_solidness = 1;
 544                                 } else {
 545                                         f->drawtype = NDT_NORMAL;
 546                                         f->solidness = 2;
 547                                         for(u32 i=0; i<6; i++){
 548                                                 tname_tiles[i] += std::string("^[noalpha");
 549                                         }
 550                                 }
 551                                 break;
 552                         case NDT_TORCHLIKE:
 553                         case NDT_SIGNLIKE:
 554                         case NDT_PLANTLIKE:
 555                         case NDT_FENCELIKE:
 556                         case NDT_RAILLIKE:
 557                                 f->solidness = 0;
 558                                 break;
 559                         }
 560
 561                         // Tile textures
 562                         for(u16 j=0; j<6; j++){
 563                                 f->tiles[j].texture = tsrc->getTexture(tname_tiles[j]);
 564                                 f->tiles[j].alpha = f->alpha;
 565                                 if(f->alpha == 255)
 566                                         f->tiles[j].material_type = MATERIAL_ALPHA_SIMPLE;
 567                                 else
 568                                         f->tiles[j].material_type = MATERIAL_ALPHA_VERTEX;
 569                                 f->tiles[j].material_flags = 0;
 570                                 if(f->backface_culling)
 571                                         f->tiles[j].material_flags |= MATERIAL_FLAG_BACKFACE_CULLING;
 572                         }
 573                         // Special tiles
 574                         for(u16 j=0; j<CF_SPECIAL_COUNT; j++){
 575                                 f->special_tiles[j].texture = tsrc->getTexture(f->mspec_special[j].tname);
 576                                 f->special_tiles[j].alpha = f->alpha;
 577                                 if(f->alpha == 255)
 578                                         f->special_tiles[j].material_type = MATERIAL_ALPHA_SIMPLE;
 579                                 else
 580                                         f->special_tiles[j].material_type = MATERIAL_ALPHA_VERTEX;
 581                                 f->special_tiles[j].material_flags = 0;
 582                                 if(f->mspec_special[j].backface_culling)
 583                                         f->special_tiles[j].material_flags |= MATERIAL_FLAG_BACKFACE_CULLING;
 584                         }
 585                 }
 586 #endif
 587         }
 588         void serialize(std::ostream &os)
 589         {
 590                 writeU8(os, 1); // version
 591                 u16 count = 0;
 592                 std::ostringstream os2(std::ios::binary);
 593                 for(u16 i=0; i<=MAX_CONTENT; i++)
 594                 {
 595                         if(i == CONTENT_IGNORE || i == CONTENT_AIR)
 596                                 continue;
 597                         ContentFeatures *f = &m_content_features[i];
 598                         if(f->name == "")
 599                                 continue;
 600                         writeU16(os2, i);
 601                         // Wrap it in a string to allow different lengths without
 602                         // strict version incompatibilities
 603                         std::ostringstream wrapper_os(std::ios::binary);
 604                         f->serialize(wrapper_os);
 605                         os2<<serializeString(wrapper_os.str());
 606                         count++;
 607                 }
 608                 writeU16(os, count);
 609                 os<<serializeLongString(os2.str());
 610         }
 611         void deSerialize(std::istream &is)
 612         {
 613                 clear();
 614                 int version = readU8(is);
 615                 if(version != 1)
 616                         throw SerializationError("unsupported NodeDefinitionManager version");
 617                 u16 count = readU16(is);
 618                 std::istringstream is2(deSerializeLongString(is), std::ios::binary);
 619                 for(u16 n=0; n<count; n++){
 620                         u16 i = readU16(is2);
 621                         if(i > MAX_CONTENT){
 622                                 errorstream<<"ContentFeatures::deSerialize(): "
 623                                                 <<"Too large content id: "<<i<<std::endl;
 624                                 continue;
 625                         }
 626                         /*// Do not deserialize special types
 627                         if(i == CONTENT_IGNORE || i == CONTENT_AIR)
 628                                 continue;*/
 629                         ContentFeatures *f = &m_content_features[i];
 630                         // Read it from the string wrapper
 631                         std::string wrapper = deSerializeString(is2);
 632                         std::istringstream wrapper_is(wrapper, std::ios::binary);
 633                         f->deSerialize(wrapper_is);
 634                         if(f->name != "")
 635                                 addNameIdMapping(i, f->name);
 636                 }
 637         }
 638 private:
 639         void addNameIdMapping(content_t i, std::string name)
 640         {
 641                 m_name_id_mapping.set(i, name);
 642                 m_name_id_mapping_with_aliases.insert(std::make_pair(name, i));
 643         }
 644 private:
 645         // Features indexed by id
 646         ContentFeatures m_content_features[MAX_CONTENT+1];
 647         // A mapping for fast converting back and forth between names and ids
 648         NameIdMapping m_name_id_mapping;
 649         // Like m_name_id_mapping, but only from names to ids, and includes
 650         // item aliases too. Updated by updateAliases()
 651         // Note: Not serialized.
 652         std::map<std::string, content_t> m_name_id_mapping_with_aliases;
 653 };
 654
 655 IWritableNodeDefManager* createNodeDefManager()
 656 {
 657         return new CNodeDefManager();
 658 }
 659