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 "nodemetadata.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         ContentFeatures
  83 */
  84
  85 ContentFeatures::ContentFeatures()
  86 {
  87         reset();
  88 }
  89
  90 ContentFeatures::~ContentFeatures()
  91 {
  92 #ifndef SERVER
  93         for(u16 j=0; j<CF_SPECIAL_COUNT; j++){
  94                 delete special_materials[j];
  95                 delete special_aps[j];
  96         }
  97 #endif
  98 }
  99
 100 void ContentFeatures::reset()
 101 {
 102         /*
 103                 Cached stuff
 104         */
 105 #ifndef SERVER
 106         inventory_texture = NULL;
 107
 108         for(u16 j=0; j<CF_SPECIAL_COUNT; j++){
 109                 special_materials[j] = NULL;
 110                 special_aps[j] = NULL;
 111         }
 112         solidness = 2;
 113         visual_solidness = 0;
 114         backface_culling = true;
 115 #endif
 116         used_texturenames.clear();
 117         /*
 118                 Actual data
 119
 120                 NOTE: Most of this is always overridden by the default values given
 121                       in builtin.lua
 122         */
 123         name = "";
 124         drawtype = NDT_NORMAL;
 125         visual_scale = 1.0;
 126         for(u32 i=0; i<6; i++)
 127                 tname_tiles[i] = "";
 128         for(u16 j=0; j<CF_SPECIAL_COUNT; j++)
 129                 mspec_special[j] = MaterialSpec();
 130         tname_inventory = "";
 131         alpha = 255;
 132         post_effect_color = video::SColor(0, 0, 0, 0);
 133         param_type = CPT_NONE;
 134         is_ground_content = false;
 135         light_propagates = false;
 136         sunlight_propagates = false;
 137         walkable = true;
 138         pointable = true;
 139         diggable = true;
 140         climbable = false;
 141         buildable_to = false;
 142         wall_mounted = false;
 143         often_contains_mineral = false;
 144         dug_item = "";
 145         extra_dug_item = "";
 146         extra_dug_item_rarity = 2;
 147         metadata_name = "";
 148         liquid_type = LIQUID_NONE;
 149         liquid_alternative_flowing = "";
 150         liquid_alternative_source = "";
 151         liquid_viscosity = 0;
 152         light_source = 0;
 153         damage_per_second = 0;
 154         selection_box = NodeBox();
 155         material = MaterialProperties();
 156         cookresult_item = ""; // Cannot be cooked
 157         furnace_cooktime = 3.0;
 158         furnace_burntime = -1.0; // Cannot be burned
 159 }
 160
 161 void ContentFeatures::serialize(std::ostream &os)
 162 {
 163         writeU8(os, 0); // version
 164         os<<serializeString(name);
 165         writeU8(os, drawtype);
 166         writeF1000(os, visual_scale);
 167         writeU8(os, 6);
 168         for(u32 i=0; i<6; i++)
 169                 os<<serializeString(tname_tiles[i]);
 170         os<<serializeString(tname_inventory);
 171         writeU8(os, CF_SPECIAL_COUNT);
 172         for(u32 i=0; i<CF_SPECIAL_COUNT; i++){
 173                 mspec_special[i].serialize(os);
 174         }
 175         writeU8(os, alpha);
 176         writeU8(os, post_effect_color.getAlpha());
 177         writeU8(os, post_effect_color.getRed());
 178         writeU8(os, post_effect_color.getGreen());
 179         writeU8(os, post_effect_color.getBlue());
 180         writeU8(os, param_type);
 181         writeU8(os, is_ground_content);
 182         writeU8(os, light_propagates);
 183         writeU8(os, sunlight_propagates);
 184         writeU8(os, walkable);
 185         writeU8(os, pointable);
 186         writeU8(os, diggable);
 187         writeU8(os, climbable);
 188         writeU8(os, buildable_to);
 189         writeU8(os, wall_mounted);
 190         writeU8(os, often_contains_mineral);
 191         os<<serializeString(dug_item);
 192         os<<serializeString(extra_dug_item);
 193         writeS32(os, extra_dug_item_rarity);
 194         os<<serializeString(metadata_name);
 195         writeU8(os, liquid_type);
 196         os<<serializeString(liquid_alternative_flowing);
 197         os<<serializeString(liquid_alternative_source);
 198         writeU8(os, liquid_viscosity);
 199         writeU8(os, light_source);
 200         writeU32(os, damage_per_second);
 201         selection_box.serialize(os);
 202         material.serialize(os);
 203         os<<serializeString(cookresult_item);
 204         writeF1000(os, furnace_cooktime);
 205         writeF1000(os, furnace_burntime);
 206 }
 207
 208 void ContentFeatures::deSerialize(std::istream &is, IGameDef *gamedef)
 209 {
 210         int version = readU8(is);
 211         if(version != 0)
 212                 throw SerializationError("unsupported ContentFeatures version");
 213         name = deSerializeString(is);
 214         drawtype = (enum NodeDrawType)readU8(is);
 215         visual_scale = readF1000(is);
 216         if(readU8(is) != 6)
 217                 throw SerializationError("unsupported tile count");
 218         for(u32 i=0; i<6; i++)
 219                 setTexture(i, deSerializeString(is));
 220                 //tname_tiles[i] = deSerializeString(is);
 221         tname_inventory = deSerializeString(is);
 222         if(readU8(is) != CF_SPECIAL_COUNT)
 223                 throw SerializationError("unsupported CF_SPECIAL_COUNT");
 224         for(u32 i=0; i<CF_SPECIAL_COUNT; i++){
 225                 mspec_special[i].deSerialize(is);
 226         }
 227         alpha = readU8(is);
 228         post_effect_color.setAlpha(readU8(is));
 229         post_effect_color.setRed(readU8(is));
 230         post_effect_color.setGreen(readU8(is));
 231         post_effect_color.setBlue(readU8(is));
 232         param_type = (enum ContentParamType)readU8(is);
 233         is_ground_content = readU8(is);
 234         light_propagates = readU8(is);
 235         sunlight_propagates = readU8(is);
 236         walkable = readU8(is);
 237         pointable = readU8(is);
 238         diggable = readU8(is);
 239         climbable = readU8(is);
 240         buildable_to = readU8(is);
 241         wall_mounted = readU8(is);
 242         often_contains_mineral = readU8(is);
 243         dug_item = deSerializeString(is);
 244         extra_dug_item = deSerializeString(is);
 245         extra_dug_item_rarity = readS32(is);
 246         metadata_name = deSerializeString(is);
 247         liquid_type = (enum LiquidType)readU8(is);
 248         liquid_alternative_flowing = deSerializeString(is);
 249         liquid_alternative_source = deSerializeString(is);
 250         liquid_viscosity = readU8(is);
 251         light_source = readU8(is);
 252         damage_per_second = readU32(is);
 253         selection_box.deSerialize(is);
 254         material.deSerialize(is);
 255         cookresult_item = deSerializeString(is);
 256         furnace_cooktime = readF1000(is);
 257         furnace_burntime = readF1000(is);
 258 }
 259
 260 void ContentFeatures::setTexture(u16 i, std::string name)
 261 {
 262         used_texturenames.insert(name);
 263         tname_tiles[i] = name;
 264         if(tname_inventory == "")
 265                 tname_inventory = name;
 266 }
 267
 268 void ContentFeatures::setAllTextures(std::string name)
 269 {
 270         for(u16 i=0; i<6; i++)
 271                 setTexture(i, name);
 272         // Force inventory texture too
 273         setInventoryTexture(name);
 274 }
 275
 276 void ContentFeatures::setSpecialMaterial(u16 i, const MaterialSpec &mspec)
 277 {
 278         assert(i < CF_SPECIAL_COUNT);
 279         mspec_special[i] = mspec;
 280 }
 281
 282 void ContentFeatures::setInventoryTexture(std::string imgname)
 283 {
 284         tname_inventory = imgname;
 285 }
 286
 287 void ContentFeatures::setInventoryTextureCube(std::string top,
 288                 std::string left, std::string right)
 289 {
 290         str_replace_char(top, '^', '&');
 291         str_replace_char(left, '^', '&');
 292         str_replace_char(right, '^', '&');
 293
 294         std::string imgname_full;
 295         imgname_full += "[inventorycube{";
 296         imgname_full += top;
 297         imgname_full += "{";
 298         imgname_full += left;
 299         imgname_full += "{";
 300         imgname_full += right;
 301         tname_inventory = imgname_full;
 302 }
 303
 304 /*
 305         CNodeDefManager
 306 */
 307
 308 class CNodeDefManager: public IWritableNodeDefManager
 309 {
 310 public:
 311         void clear()
 312         {
 313                 m_name_id_mapping.clear();
 314
 315                 m_aliases.clear();
 316
 317                 for(u16 i=0; i<=MAX_CONTENT; i++)
 318                 {
 319                         ContentFeatures &f = m_content_features[i];
 320                         f.reset(); // Reset to defaults
 321                         f.setAllTextures("unknown_block.png");
 322                 }
 323
 324                 // Set CONTENT_AIR
 325                 {
 326                         ContentFeatures f;
 327                         f.name = "air";
 328                         f.drawtype = NDT_AIRLIKE;
 329                         f.param_type = CPT_LIGHT;
 330                         f.light_propagates = true;
 331                         f.sunlight_propagates = true;
 332                         f.walkable = false;
 333                         f.pointable = false;
 334                         f.diggable = false;
 335                         f.buildable_to = true;
 336                         // Insert directly into containers
 337                         content_t c = CONTENT_AIR;
 338                         m_content_features[c] = f;
 339                         m_name_id_mapping.set(c, f.name);
 340                 }
 341                 // Set CONTENT_IGNORE
 342                 {
 343                         ContentFeatures f;
 344                         f.name = "ignore";
 345                         f.drawtype = NDT_AIRLIKE;
 346                         f.param_type = CPT_NONE;
 347                         f.light_propagates = false;
 348                         f.sunlight_propagates = false;
 349                         f.walkable = false;
 350                         f.pointable = false;
 351                         f.diggable = false;
 352                         // A way to remove accidental CONTENT_IGNOREs
 353                         f.buildable_to = true;
 354                         // Insert directly into containers
 355                         content_t c = CONTENT_IGNORE;
 356                         m_content_features[c] = f;
 357                         m_name_id_mapping.set(c, f.name);
 358                 }
 359         }
 360         // CONTENT_IGNORE = not found
 361         content_t getFreeId(bool require_full_param2)
 362         {
 363                 // If allowed, first search in the large 4-byte-param2 pool
 364                 if(!require_full_param2){
 365                         for(u16 i=0x800; i<=0xfff; i++){
 366                                 const ContentFeatures &f = m_content_features[i];
 367                                 if(f.name == "")
 368                                         return i;
 369                         }
 370                 }
 371                 // Then search from the small 8-byte-param2 pool
 372                 for(u16 i=0; i<=125; i++){
 373                         const ContentFeatures &f = m_content_features[i];
 374                         if(f.name == "")
 375                                 return i;
 376                 }
 377                 return CONTENT_IGNORE;
 378         }
 379         CNodeDefManager()
 380         {
 381                 clear();
 382         }
 383         virtual ~CNodeDefManager()
 384         {
 385         }
 386         virtual IWritableNodeDefManager* clone()
 387         {
 388                 CNodeDefManager *mgr = new CNodeDefManager();
 389                 for(u16 i=0; i<=MAX_CONTENT; i++)
 390                 {
 391                         mgr->set(i, get(i));
 392                 }
 393                 return mgr;
 394         }
 395         virtual const ContentFeatures& get(content_t c) const
 396         {
 397                 assert(c <= MAX_CONTENT);
 398                 return m_content_features[c];
 399         }
 400         virtual const ContentFeatures& get(const MapNode &n) const
 401         {
 402                 return get(n.getContent());
 403         }
 404         virtual bool getId(const std::string &name_, content_t &result) const
 405         {
 406                 std::string name = name_;
 407                 // Convert name according to possible alias
 408                 std::map<std::string, std::string>::const_iterator i;
 409                 i = m_aliases.find(name);
 410                 if(i != m_aliases.end()){
 411                         /*infostream<<"ndef: alias active: "<<name<<" -> "<<i->second
 412                                         <<std::endl;*/
 413                         name = i->second;
 414                 }
 415                 // Get id
 416                 return m_name_id_mapping.getId(name, result);
 417         }
 418         virtual content_t getId(const std::string &name) const
 419         {
 420                 content_t id = CONTENT_IGNORE;
 421                 getId(name, id);
 422                 return id;
 423         }
 424         virtual const ContentFeatures& get(const std::string &name) const
 425         {
 426                 content_t id = CONTENT_IGNORE;
 427                 getId(name, id);
 428                 return get(id);
 429         }
 430         // IWritableNodeDefManager
 431         virtual void set(content_t c, const ContentFeatures &def)
 432         {
 433                 infostream<<"registerNode: registering content id \""<<c
 434                                 <<"\": name=\""<<def.name<<"\""<<std::endl;
 435                 assert(c <= MAX_CONTENT);
 436                 // Don't allow redefining CONTENT_IGNORE (but allow air)
 437                 if(def.name == "ignore" || c == CONTENT_IGNORE){
 438                         infostream<<"registerNode: WARNING: Ignoring "
 439                                         <<"CONTENT_IGNORE redefinition"<<std::endl;
 440                         return;
 441                 }
 442                 // Check that the special contents are not redefined as different id
 443                 // because it would mess up everything
 444                 if((def.name == "ignore" && c != CONTENT_IGNORE) ||
 445                         (def.name == "air" && c != CONTENT_AIR)){
 446                         errorstream<<"registerNode: IGNORING ERROR: "
 447                                         <<"trying to register built-in type \""
 448                                         <<def.name<<"\" as different id"<<std::endl;
 449                         return;
 450                 }
 451                 m_content_features[c] = def;
 452                 if(def.name != "")
 453                         m_name_id_mapping.set(c, def.name);
 454
 455                 // Remove conflicting alias if it exists
 456                 bool alias_removed = (m_aliases.erase(def.name) != 0);
 457                 if(alias_removed)
 458                         infostream<<"ndef: erased alias "<<def.name
 459                                         <<" because node was defined"<<std::endl;
 460         }
 461         virtual content_t set(const std::string &name,
 462                         const ContentFeatures &def)
 463         {
 464                 assert(name == def.name);
 465                 u16 id = CONTENT_IGNORE;
 466                 bool found = m_name_id_mapping.getId(name, id);
 467                 if(!found){
 468                         // Determine if full param2 is required
 469                         bool require_full_param2 = (
 470                                 def.liquid_type == LIQUID_FLOWING
 471                                 ||
 472                                 def.drawtype == NDT_FLOWINGLIQUID
 473                                 ||
 474                                 def.drawtype == NDT_TORCHLIKE
 475                                 ||
 476                                 def.drawtype == NDT_SIGNLIKE
 477                         );
 478                         // Get some id
 479                         id = getFreeId(require_full_param2);
 480                         if(id == CONTENT_IGNORE)
 481                                 return CONTENT_IGNORE;
 482                         if(name != "")
 483                                 m_name_id_mapping.set(id, name);
 484                 }
 485                 set(id, def);
 486                 return id;
 487         }
 488         virtual content_t allocateDummy(const std::string &name)
 489         {
 490                 assert(name != "");
 491                 ContentFeatures f;
 492                 f.name = name;
 493                 f.setAllTextures("unknown_block.png");
 494                 // Make unknown blocks diggable
 495                 f.material.diggability = DIGGABLE_NORMAL;
 496                 return set(name, f);
 497         }
 498         virtual void setAlias(const std::string &name,
 499                         const std::string &convert_to)
 500         {
 501                 content_t id;
 502                 if(getId(name, id)){
 503                         infostream<<"ndef: not setting alias "<<name<<" -> "<<convert_to
 504                                         <<": "<<name<<" is already defined"<<std::endl;
 505                         return;
 506                 }
 507                 infostream<<"ndef: setting alias "<<name<<" -> "<<convert_to
 508                                 <<std::endl;
 509                 m_aliases[name] = convert_to;
 510         }
 511         virtual void updateTextures(ITextureSource *tsrc)
 512         {
 513 #ifndef SERVER
 514                 infostream<<"CNodeDefManager::updateTextures(): Updating "
 515                                 <<"textures in node definitions"<<std::endl;
 516
 517                 bool new_style_water = g_settings->getBool("new_style_water");
 518                 bool new_style_leaves = g_settings->getBool("new_style_leaves");
 519                 bool opaque_water = g_settings->getBool("opaque_water");
 520
 521                 for(u16 i=0; i<=MAX_CONTENT; i++)
 522                 {
 523                         ContentFeatures *f = &m_content_features[i];
 524
 525                         switch(f->drawtype){
 526                         default:
 527                         case NDT_NORMAL:
 528                                 f->solidness = 2;
 529                                 break;
 530                         case NDT_AIRLIKE:
 531                                 f->solidness = 0;
 532                                 break;
 533                         case NDT_LIQUID:
 534                                 assert(f->liquid_type == LIQUID_SOURCE);
 535                                 if(opaque_water)
 536                                         f->alpha = 255;
 537                                 if(new_style_water){
 538                                         f->solidness = 0;
 539                                 } else {
 540                                         f->solidness = 1;
 541                                         if(f->alpha == 255)
 542                                                 f->solidness = 2;
 543                                         f->backface_culling = false;
 544                                 }
 545                                 break;
 546                         case NDT_FLOWINGLIQUID:
 547                                 assert(f->liquid_type == LIQUID_FLOWING);
 548                                 f->solidness = 0;
 549                                 if(opaque_water)
 550                                         f->alpha = 255;
 551                                 break;
 552                         case NDT_GLASSLIKE:
 553                                 f->solidness = 0;
 554                                 f->visual_solidness = 1;
 555                                 break;
 556                         case NDT_ALLFACES:
 557                                 f->solidness = 0;
 558                                 f->visual_solidness = 1;
 559                                 break;
 560                         case NDT_ALLFACES_OPTIONAL:
 561                                 if(new_style_leaves){
 562                                         f->drawtype = NDT_ALLFACES;
 563                                         f->solidness = 0;
 564                                         f->visual_solidness = 1;
 565                                 } else {
 566                                         f->drawtype = NDT_NORMAL;
 567                                         f->solidness = 2;
 568                                         for(u32 i=0; i<6; i++){
 569                                                 f->setTexture(i, f->tname_tiles[i]
 570                                                                 + std::string("^[noalpha"));
 571                                         }
 572                                 }
 573                                 break;
 574                         case NDT_TORCHLIKE:
 575                         case NDT_SIGNLIKE:
 576                         case NDT_PLANTLIKE:
 577                         case NDT_FENCELIKE:
 578                         case NDT_RAILLIKE:
 579                                 f->solidness = 0;
 580                                 break;
 581                         }
 582
 583                         // Inventory texture
 584                         if(f->tname_inventory != "")
 585                                 f->inventory_texture = tsrc->getTextureRaw(f->tname_inventory);
 586                         else
 587                                 f->inventory_texture = NULL;
 588                         // Tile textures
 589                         for(u16 j=0; j<6; j++){
 590                                 if(f->tname_tiles[j] == "")
 591                                         continue;
 592                                 f->tiles[j].texture = tsrc->getTexture(f->tname_tiles[j]);
 593                                 f->tiles[j].alpha = f->alpha;
 594                                 if(f->alpha == 255)
 595                                         f->tiles[j].material_type = MATERIAL_ALPHA_SIMPLE;
 596                                 else
 597                                         f->tiles[j].material_type = MATERIAL_ALPHA_VERTEX;
 598                                 if(f->backface_culling)
 599                                         f->tiles[j].material_flags |= MATERIAL_FLAG_BACKFACE_CULLING;
 600                                 else
 601                                         f->tiles[j].material_flags &= ~MATERIAL_FLAG_BACKFACE_CULLING;
 602                         }
 603                         // Special textures
 604                         for(u16 j=0; j<CF_SPECIAL_COUNT; j++){
 605                                 // Remove all stuff
 606                                 if(f->special_aps[j]){
 607                                         delete f->special_aps[j];
 608                                         f->special_aps[j] = NULL;
 609                                 }
 610                                 if(f->special_materials[j]){
 611                                         delete f->special_materials[j];
 612                                         f->special_materials[j] = NULL;
 613                                 }
 614                                 // Skip if should not exist
 615                                 if(f->mspec_special[j].tname == "")
 616                                         continue;
 617                                 // Create all stuff
 618                                 f->special_aps[j] = new AtlasPointer(
 619                                                 tsrc->getTexture(f->mspec_special[j].tname));
 620                                 f->special_materials[j] = new video::SMaterial;
 621                                 f->special_materials[j]->setFlag(video::EMF_LIGHTING, false);
 622                                 f->special_materials[j]->setFlag(video::EMF_BACK_FACE_CULLING,
 623                                                 f->mspec_special[j].backface_culling);
 624                                 f->special_materials[j]->setFlag(video::EMF_BILINEAR_FILTER, false);
 625                                 f->special_materials[j]->setFlag(video::EMF_FOG_ENABLE, true);
 626                                 f->special_materials[j]->setTexture(0, f->special_aps[j]->atlas);
 627                                 if(f->alpha != 255)
 628                                         f->special_materials[j]->MaterialType =
 629                                                         video::EMT_TRANSPARENT_VERTEX_ALPHA;
 630                         }
 631                 }
 632 #endif
 633         }
 634         void serialize(std::ostream &os)
 635         {
 636                 u16 count = 0;
 637                 std::ostringstream tmp_os(std::ios::binary);
 638                 for(u16 i=0; i<=MAX_CONTENT; i++)
 639                 {
 640                         if(i == CONTENT_IGNORE || i == CONTENT_AIR)
 641                                 continue;
 642                         ContentFeatures *f = &m_content_features[i];
 643                         if(f->name == "")
 644                                 continue;
 645                         writeU16(tmp_os, i);
 646                         f->serialize(tmp_os);
 647                         count++;
 648                 }
 649                 writeU16(os, count);
 650                 os<<serializeLongString(tmp_os.str());
 651
 652                 writeU16(os, m_aliases.size());
 653                 for(std::map<std::string, std::string>::const_iterator
 654                                 i = m_aliases.begin(); i != m_aliases.end(); i++)
 655                 {
 656                         os<<serializeString(i->first);
 657                         os<<serializeString(i->second);
 658                 }
 659         }
 660         void deSerialize(std::istream &is, IGameDef *gamedef)
 661         {
 662                 clear();
 663                 u16 count = readU16(is);
 664                 std::istringstream tmp_is(deSerializeLongString(is), std::ios::binary);
 665                 for(u16 n=0; n<count; n++){
 666                         u16 i = readU16(tmp_is);
 667                         if(i > MAX_CONTENT){
 668                                 errorstream<<"ContentFeatures::deSerialize(): "
 669                                                 <<"Too large content id: "<<i<<std::endl;
 670                                 continue;
 671                         }
 672                         /*// Do not deserialize special types
 673                         if(i == CONTENT_IGNORE || i == CONTENT_AIR)
 674                                 continue;*/
 675                         ContentFeatures *f = &m_content_features[i];
 676                         f->deSerialize(tmp_is, gamedef);
 677                         if(f->name != "")
 678                                 m_name_id_mapping.set(i, f->name);
 679                 }
 680
 681                 u16 num_aliases = readU16(is);
 682                 if(!is.eof()){
 683                         for(u16 i=0; i<num_aliases; i++){
 684                                 std::string name = deSerializeString(is);
 685                                 std::string convert_to = deSerializeString(is);
 686                                 m_aliases[name] = convert_to;
 687                         }
 688                 }
 689         }
 690 private:
 691         // Features indexed by id
 692         ContentFeatures m_content_features[MAX_CONTENT+1];
 693         // A mapping for fast converting back and forth between names and ids
 694         NameIdMapping m_name_id_mapping;
 695         // Aliases for loading legacy crap
 696         std::map<std::string, std::string> m_aliases;
 697 };
 698
 699 IWritableNodeDefManager* createNodeDefManager()
 700 {
 701         return new CNodeDefManager();
 702 }
 703