src/mapnode.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 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 Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser 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 "irrlichttypes_extrabloated.h"
  21 #include "mapnode.h"
  22 #include "porting.h"
  23 #include "nodedef.h"
  24 #include "map.h"
  25 #include "content_mapnode.h" // For mapnode_translate_*_internal
  26 #include "serialization.h" // For ser_ver_supported
  27 #include "util/serialize.h"
  28 #include "log.h"
  29 #include "util/numeric.h"
  30 #include <string>
  31 #include <sstream>
  32
  33 static const Rotation wallmounted_to_rot[] = {
  34         ROTATE_0, ROTATE_180, ROTATE_90, ROTATE_270
  35 };
  36
  37 static const u8 rot_to_wallmounted[] = {
  38         2, 4, 3, 5
  39 };
  40
  41
  42 /*
  43         MapNode
  44 */
  45
  46 // Create directly from a nodename
  47 // If name is unknown, sets CONTENT_IGNORE
  48 MapNode::MapNode(INodeDefManager *ndef, const std::string &name,
  49                 u8 a_param1, u8 a_param2)
  50 {
  51         content_t id = CONTENT_IGNORE;
  52         ndef->getId(name, id);
  53         param0 = id;
  54         param1 = a_param1;
  55         param2 = a_param2;
  56 }
  57
  58 void MapNode::getColor(const ContentFeatures &f, video::SColor *color) const
  59 {
  60         if (f.palette) {
  61                 *color = (*f.palette)[param2];
  62                 return;
  63         }
  64         *color = f.color;
  65 }
  66
  67 void MapNode::setLight(enum LightBank bank, u8 a_light, const ContentFeatures &f)
  68 {
  69         // If node doesn't contain light data, ignore this
  70         if(f.param_type != CPT_LIGHT)
  71                 return;
  72         if(bank == LIGHTBANK_DAY)
  73         {
  74                 param1 &= 0xf0;
  75                 param1 |= a_light & 0x0f;
  76         }
  77         else if(bank == LIGHTBANK_NIGHT)
  78         {
  79                 param1 &= 0x0f;
  80                 param1 |= (a_light & 0x0f)<<4;
  81         }
  82         else
  83                 assert("Invalid light bank" == NULL);
  84 }
  85
  86 void MapNode::setLight(enum LightBank bank, u8 a_light, INodeDefManager *nodemgr)
  87 {
  88         setLight(bank, a_light, nodemgr->get(*this));
  89 }
  90
  91 bool MapNode::isLightDayNightEq(INodeDefManager *nodemgr) const
  92 {
  93         const ContentFeatures &f = nodemgr->get(*this);
  94         bool isEqual;
  95
  96         if (f.param_type == CPT_LIGHT) {
  97                 u8 day   = MYMAX(f.light_source, param1 & 0x0f);
  98                 u8 night = MYMAX(f.light_source, (param1 >> 4) & 0x0f);
  99                 isEqual = day == night;
 100         } else {
 101                 isEqual = true;
 102         }
 103
 104         return isEqual;
 105 }
 106
 107 u8 MapNode::getLight(enum LightBank bank, INodeDefManager *nodemgr) const
 108 {
 109         // Select the brightest of [light source, propagated light]
 110         const ContentFeatures &f = nodemgr->get(*this);
 111
 112         u8 light;
 113         if(f.param_type == CPT_LIGHT)
 114                 light = bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f;
 115         else
 116                 light = 0;
 117
 118         return MYMAX(f.light_source, light);
 119 }
 120
 121 u8 MapNode::getLightRaw(enum LightBank bank, const ContentFeatures &f) const
 122 {
 123         if(f.param_type == CPT_LIGHT)
 124                 return bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f;
 125         return 0;
 126 }
 127
 128 u8 MapNode::getLightNoChecks(enum LightBank bank, const ContentFeatures *f) const
 129 {
 130         return MYMAX(f->light_source,
 131                      bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f);
 132 }
 133
 134 bool MapNode::getLightBanks(u8 &lightday, u8 &lightnight, INodeDefManager *nodemgr) const
 135 {
 136         // Select the brightest of [light source, propagated light]
 137         const ContentFeatures &f = nodemgr->get(*this);
 138         if(f.param_type == CPT_LIGHT)
 139         {
 140                 lightday = param1 & 0x0f;
 141                 lightnight = (param1>>4)&0x0f;
 142         }
 143         else
 144         {
 145                 lightday = 0;
 146                 lightnight = 0;
 147         }
 148         if(f.light_source > lightday)
 149                 lightday = f.light_source;
 150         if(f.light_source > lightnight)
 151                 lightnight = f.light_source;
 152         return f.param_type == CPT_LIGHT || f.light_source != 0;
 153 }
 154
 155 u8 MapNode::getFaceDir(INodeDefManager *nodemgr) const
 156 {
 157         const ContentFeatures &f = nodemgr->get(*this);
 158         if (f.param_type_2 == CPT2_FACEDIR ||
 159                         f.param_type_2 == CPT2_COLORED_FACEDIR)
 160                 return (getParam2() & 0x1F) % 24;
 161         return 0;
 162 }
 163
 164 u8 MapNode::getWallMounted(INodeDefManager *nodemgr) const
 165 {
 166         const ContentFeatures &f = nodemgr->get(*this);
 167         if (f.param_type_2 == CPT2_WALLMOUNTED ||
 168                         f.param_type_2 == CPT2_COLORED_WALLMOUNTED)
 169                 return getParam2() & 0x07;
 170         return 0;
 171 }
 172
 173 v3s16 MapNode::getWallMountedDir(INodeDefManager *nodemgr) const
 174 {
 175         switch(getWallMounted(nodemgr))
 176         {
 177         case 0: default: return v3s16(0,1,0);
 178         case 1: return v3s16(0,-1,0);
 179         case 2: return v3s16(1,0,0);
 180         case 3: return v3s16(-1,0,0);
 181         case 4: return v3s16(0,0,1);
 182         case 5: return v3s16(0,0,-1);
 183         }
 184 }
 185
 186 void MapNode::rotateAlongYAxis(INodeDefManager *nodemgr, Rotation rot)
 187 {
 188         ContentParamType2 cpt2 = nodemgr->get(*this).param_type_2;
 189
 190         if (cpt2 == CPT2_FACEDIR || cpt2 == CPT2_COLORED_FACEDIR) {
 191                 static const u8 rotate_facedir[24 * 4] = {
 192                         // Table value = rotated facedir
 193                         // Columns: 0, 90, 180, 270 degrees rotation around vertical axis
 194                         // Rotation is anticlockwise as seen from above (+Y)
 195
 196                         0, 1, 2, 3,  // Initial facedir 0 to 3
 197                         1, 2, 3, 0,
 198                         2, 3, 0, 1,
 199                         3, 0, 1, 2,
 200
 201                         4, 13, 10, 19,  // 4 to 7
 202                         5, 14, 11, 16,
 203                         6, 15, 8, 17,
 204                         7, 12, 9, 18,
 205
 206                         8, 17, 6, 15,  // 8 to 11
 207                         9, 18, 7, 12,
 208                         10, 19, 4, 13,
 209                         11, 16, 5, 14,
 210
 211                         12, 9, 18, 7,  // 12 to 15
 212                         13, 10, 19, 4,
 213                         14, 11, 16, 5,
 214                         15, 8, 17, 6,
 215
 216                         16, 5, 14, 11,  // 16 to 19
 217                         17, 6, 15, 8,
 218                         18, 7, 12, 9,
 219                         19, 4, 13, 10,
 220
 221                         20, 23, 22, 21,  // 20 to 23
 222                         21, 20, 23, 22,
 223                         22, 21, 20, 23,
 224                         23, 22, 21, 20
 225                 };
 226                 u8 facedir = (param2 & 31) % 24;
 227                 u8 index = facedir * 4 + rot;
 228                 param2 &= ~31;
 229                 param2 |= rotate_facedir[index];
 230         } else if (cpt2 == CPT2_WALLMOUNTED ||
 231                         cpt2 == CPT2_COLORED_WALLMOUNTED) {
 232                 u8 wmountface = (param2 & 7);
 233                 if (wmountface <= 1)
 234                         return;
 235
 236                 Rotation oldrot = wallmounted_to_rot[wmountface - 2];
 237                 param2 &= ~7;
 238                 param2 |= rot_to_wallmounted[(oldrot - rot) & 3];
 239         }
 240 }
 241
 242 void transformNodeBox(const MapNode &n, const NodeBox &nodebox,
 243                 INodeDefManager *nodemgr, std::vector<aabb3f> *p_boxes, u8 neighbors = 0)
 244 {
 245         std::vector<aabb3f> &boxes = *p_boxes;
 246
 247         if (nodebox.type == NODEBOX_FIXED || nodebox.type == NODEBOX_LEVELED) {
 248                 const std::vector<aabb3f> &fixed = nodebox.fixed;
 249                 int facedir = n.getFaceDir(nodemgr);
 250                 u8 axisdir = facedir>>2;
 251                 facedir&=0x03;
 252                 for (aabb3f box : fixed) {
 253                         if (nodebox.type == NODEBOX_LEVELED)
 254                                 box.MaxEdge.Y = (-0.5f + n.getLevel(nodemgr) / 64.0f) * BS;
 255
 256                         switch (axisdir) {
 257                         case 0:
 258                                 if(facedir == 1)
 259                                 {
 260                                         box.MinEdge.rotateXZBy(-90);
 261                                         box.MaxEdge.rotateXZBy(-90);
 262                                 }
 263                                 else if(facedir == 2)
 264                                 {
 265                                         box.MinEdge.rotateXZBy(180);
 266                                         box.MaxEdge.rotateXZBy(180);
 267                                 }
 268                                 else if(facedir == 3)
 269                                 {
 270                                         box.MinEdge.rotateXZBy(90);
 271                                         box.MaxEdge.rotateXZBy(90);
 272                                 }
 273                                 break;
 274                         case 1: // z+
 275                                 box.MinEdge.rotateYZBy(90);
 276                                 box.MaxEdge.rotateYZBy(90);
 277                                 if(facedir == 1)
 278                                 {
 279                                         box.MinEdge.rotateXYBy(90);
 280                                         box.MaxEdge.rotateXYBy(90);
 281                                 }
 282                                 else if(facedir == 2)
 283                                 {
 284                                         box.MinEdge.rotateXYBy(180);
 285                                         box.MaxEdge.rotateXYBy(180);
 286                                 }
 287                                 else if(facedir == 3)
 288                                 {
 289                                         box.MinEdge.rotateXYBy(-90);
 290                                         box.MaxEdge.rotateXYBy(-90);
 291                                 }
 292                                 break;
 293                         case 2: //z-
 294                                 box.MinEdge.rotateYZBy(-90);
 295                                 box.MaxEdge.rotateYZBy(-90);
 296                                 if(facedir == 1)
 297                                 {
 298                                         box.MinEdge.rotateXYBy(-90);
 299                                         box.MaxEdge.rotateXYBy(-90);
 300                                 }
 301                                 else if(facedir == 2)
 302                                 {
 303                                         box.MinEdge.rotateXYBy(180);
 304                                         box.MaxEdge.rotateXYBy(180);
 305                                 }
 306                                 else if(facedir == 3)
 307                                 {
 308                                         box.MinEdge.rotateXYBy(90);
 309                                         box.MaxEdge.rotateXYBy(90);
 310                                 }
 311                                 break;
 312                         case 3:  //x+
 313                                 box.MinEdge.rotateXYBy(-90);
 314                                 box.MaxEdge.rotateXYBy(-90);
 315                                 if(facedir == 1)
 316                                 {
 317                                         box.MinEdge.rotateYZBy(90);
 318                                         box.MaxEdge.rotateYZBy(90);
 319                                 }
 320                                 else if(facedir == 2)
 321                                 {
 322                                         box.MinEdge.rotateYZBy(180);
 323                                         box.MaxEdge.rotateYZBy(180);
 324                                 }
 325                                 else if(facedir == 3)
 326                                 {
 327                                         box.MinEdge.rotateYZBy(-90);
 328                                         box.MaxEdge.rotateYZBy(-90);
 329                                 }
 330                                 break;
 331                         case 4:  //x-
 332                                 box.MinEdge.rotateXYBy(90);
 333                                 box.MaxEdge.rotateXYBy(90);
 334                                 if(facedir == 1)
 335                                 {
 336                                         box.MinEdge.rotateYZBy(-90);
 337                                         box.MaxEdge.rotateYZBy(-90);
 338                                 }
 339                                 else if(facedir == 2)
 340                                 {
 341                                         box.MinEdge.rotateYZBy(180);
 342                                         box.MaxEdge.rotateYZBy(180);
 343                                 }
 344                                 else if(facedir == 3)
 345                                 {
 346                                         box.MinEdge.rotateYZBy(90);
 347                                         box.MaxEdge.rotateYZBy(90);
 348                                 }
 349                                 break;
 350                         case 5:
 351                                 box.MinEdge.rotateXYBy(-180);
 352                                 box.MaxEdge.rotateXYBy(-180);
 353                                 if(facedir == 1)
 354                                 {
 355                                         box.MinEdge.rotateXZBy(90);
 356                                         box.MaxEdge.rotateXZBy(90);
 357                                 }
 358                                 else if(facedir == 2)
 359                                 {
 360                                         box.MinEdge.rotateXZBy(180);
 361                                         box.MaxEdge.rotateXZBy(180);
 362                                 }
 363                                 else if(facedir == 3)
 364                                 {
 365                                         box.MinEdge.rotateXZBy(-90);
 366                                         box.MaxEdge.rotateXZBy(-90);
 367                                 }
 368                                 break;
 369                         default:
 370                                 break;
 371                         }
 372                         box.repair();
 373                         boxes.push_back(box);
 374                 }
 375         }
 376         else if(nodebox.type == NODEBOX_WALLMOUNTED)
 377         {
 378                 v3s16 dir = n.getWallMountedDir(nodemgr);
 379
 380                 // top
 381                 if(dir == v3s16(0,1,0))
 382                 {
 383                         boxes.push_back(nodebox.wall_top);
 384                 }
 385                 // bottom
 386                 else if(dir == v3s16(0,-1,0))
 387                 {
 388                         boxes.push_back(nodebox.wall_bottom);
 389                 }
 390                 // side
 391                 else
 392                 {
 393                         v3f vertices[2] =
 394                         {
 395                                 nodebox.wall_side.MinEdge,
 396                                 nodebox.wall_side.MaxEdge
 397                         };
 398
 399                         for (v3f &vertex : vertices) {
 400                                 if(dir == v3s16(-1,0,0))
 401                                         vertex.rotateXZBy(0);
 402                                 if(dir == v3s16(1,0,0))
 403                                         vertex.rotateXZBy(180);
 404                                 if(dir == v3s16(0,0,-1))
 405                                         vertex.rotateXZBy(90);
 406                                 if(dir == v3s16(0,0,1))
 407                                         vertex.rotateXZBy(-90);
 408                         }
 409
 410                         aabb3f box = aabb3f(vertices[0]);
 411                         box.addInternalPoint(vertices[1]);
 412                         boxes.push_back(box);
 413                 }
 414         }
 415         else if (nodebox.type == NODEBOX_CONNECTED)
 416         {
 417                 size_t boxes_size = boxes.size();
 418                 boxes_size += nodebox.fixed.size();
 419                 if (neighbors & 1)
 420                         boxes_size += nodebox.connect_top.size();
 421                 if (neighbors & 2)
 422                         boxes_size += nodebox.connect_bottom.size();
 423                 if (neighbors & 4)
 424                         boxes_size += nodebox.connect_front.size();
 425                 if (neighbors & 8)
 426                         boxes_size += nodebox.connect_left.size();
 427                 if (neighbors & 16)
 428                         boxes_size += nodebox.connect_back.size();
 429                 if (neighbors & 32)
 430                         boxes_size += nodebox.connect_right.size();
 431                 boxes.reserve(boxes_size);
 432
 433 #define BOXESPUSHBACK(c) \
 434                 for (std::vector<aabb3f>::const_iterator \
 435                                 it = (c).begin(); \
 436                                 it != (c).end(); ++it) \
 437                         (boxes).push_back(*it);
 438
 439                 BOXESPUSHBACK(nodebox.fixed);
 440
 441                 if (neighbors & 1)
 442                         BOXESPUSHBACK(nodebox.connect_top);
 443                 if (neighbors & 2)
 444                         BOXESPUSHBACK(nodebox.connect_bottom);
 445                 if (neighbors & 4)
 446                         BOXESPUSHBACK(nodebox.connect_front);
 447                 if (neighbors & 8)
 448                         BOXESPUSHBACK(nodebox.connect_left);
 449                 if (neighbors & 16)
 450                         BOXESPUSHBACK(nodebox.connect_back);
 451                 if (neighbors & 32)
 452                         BOXESPUSHBACK(nodebox.connect_right);
 453         }
 454         else // NODEBOX_REGULAR
 455         {
 456                 boxes.emplace_back(-BS/2,-BS/2,-BS/2,BS/2,BS/2,BS/2);
 457         }
 458 }
 459
 460 static inline void getNeighborConnectingFace(
 461         const v3s16 &p, INodeDefManager *nodedef,
 462         Map *map, MapNode n, u8 bitmask, u8 *neighbors)
 463 {
 464         MapNode n2 = map->getNodeNoEx(p);
 465         if (nodedef->nodeboxConnects(n, n2, bitmask))
 466                 *neighbors |= bitmask;
 467 }
 468
 469 u8 MapNode::getNeighbors(v3s16 p, Map *map)
 470 {
 471         INodeDefManager *nodedef=map->getNodeDefManager();
 472         u8 neighbors = 0;
 473         const ContentFeatures &f = nodedef->get(*this);
 474         // locate possible neighboring nodes to connect to
 475         if (f.drawtype == NDT_NODEBOX && f.node_box.type == NODEBOX_CONNECTED) {
 476                 v3s16 p2 = p;
 477
 478                 p2.Y++;
 479                 getNeighborConnectingFace(p2, nodedef, map, *this, 1, &neighbors);
 480
 481                 p2 = p;
 482                 p2.Y--;
 483                 getNeighborConnectingFace(p2, nodedef, map, *this, 2, &neighbors);
 484
 485                 p2 = p;
 486                 p2.Z--;
 487                 getNeighborConnectingFace(p2, nodedef, map, *this, 4, &neighbors);
 488
 489                 p2 = p;
 490                 p2.X--;
 491                 getNeighborConnectingFace(p2, nodedef, map, *this, 8, &neighbors);
 492
 493                 p2 = p;
 494                 p2.Z++;
 495                 getNeighborConnectingFace(p2, nodedef, map, *this, 16, &neighbors);
 496
 497                 p2 = p;
 498                 p2.X++;
 499                 getNeighborConnectingFace(p2, nodedef, map, *this, 32, &neighbors);
 500         }
 501
 502         return neighbors;
 503 }
 504
 505 void MapNode::getNodeBoxes(INodeDefManager *nodemgr, std::vector<aabb3f> *boxes, u8 neighbors)
 506 {
 507         const ContentFeatures &f = nodemgr->get(*this);
 508         transformNodeBox(*this, f.node_box, nodemgr, boxes, neighbors);
 509 }
 510
 511 void MapNode::getCollisionBoxes(INodeDefManager *nodemgr, std::vector<aabb3f> *boxes, u8 neighbors)
 512 {
 513         const ContentFeatures &f = nodemgr->get(*this);
 514         if (f.collision_box.fixed.empty())
 515                 transformNodeBox(*this, f.node_box, nodemgr, boxes, neighbors);
 516         else
 517                 transformNodeBox(*this, f.collision_box, nodemgr, boxes, neighbors);
 518 }
 519
 520 void MapNode::getSelectionBoxes(INodeDefManager *nodemgr, std::vector<aabb3f> *boxes, u8 neighbors)
 521 {
 522         const ContentFeatures &f = nodemgr->get(*this);
 523         transformNodeBox(*this, f.selection_box, nodemgr, boxes, neighbors);
 524 }
 525
 526 u8 MapNode::getMaxLevel(INodeDefManager *nodemgr) const
 527 {
 528         const ContentFeatures &f = nodemgr->get(*this);
 529         // todo: after update in all games leave only if (f.param_type_2 ==
 530         if( f.liquid_type == LIQUID_FLOWING || f.param_type_2 == CPT2_FLOWINGLIQUID)
 531                 return LIQUID_LEVEL_MAX;
 532         if(f.leveled || f.param_type_2 == CPT2_LEVELED)
 533                 return LEVELED_MAX;
 534         return 0;
 535 }
 536
 537 u8 MapNode::getLevel(INodeDefManager *nodemgr) const
 538 {
 539         const ContentFeatures &f = nodemgr->get(*this);
 540         // todo: after update in all games leave only if (f.param_type_2 ==
 541         if(f.liquid_type == LIQUID_SOURCE)
 542                 return LIQUID_LEVEL_SOURCE;
 543         if (f.param_type_2 == CPT2_FLOWINGLIQUID)
 544                 return getParam2() & LIQUID_LEVEL_MASK;
 545         if(f.liquid_type == LIQUID_FLOWING) // can remove if all param_type_2 setted
 546                 return getParam2() & LIQUID_LEVEL_MASK;
 547         if(f.leveled || f.param_type_2 == CPT2_LEVELED) {
 548                  u8 level = getParam2() & LEVELED_MASK;
 549                  if(level)
 550                         return level;
 551                  if(f.leveled > LEVELED_MAX)
 552                         return LEVELED_MAX;
 553                  return f.leveled; //default
 554         }
 555         return 0;
 556 }
 557
 558 u8 MapNode::setLevel(INodeDefManager *nodemgr, s8 level)
 559 {
 560         u8 rest = 0;
 561         if (level < 1) {
 562                 setContent(CONTENT_AIR);
 563                 return 0;
 564         }
 565         const ContentFeatures &f = nodemgr->get(*this);
 566         if (f.param_type_2 == CPT2_FLOWINGLIQUID
 567                 || f.liquid_type == LIQUID_FLOWING
 568                 || f.liquid_type == LIQUID_SOURCE) {
 569                 if (level >= LIQUID_LEVEL_SOURCE) {
 570                         rest = level - LIQUID_LEVEL_SOURCE;
 571                         setContent(nodemgr->getId(f.liquid_alternative_source));
 572                 } else {
 573                         setContent(nodemgr->getId(f.liquid_alternative_flowing));
 574                         setParam2(level & LIQUID_LEVEL_MASK);
 575                 }
 576         } else if (f.leveled || f.param_type_2 == CPT2_LEVELED) {
 577                 if (level > LEVELED_MAX) {
 578                         rest = level - LEVELED_MAX;
 579                         level = LEVELED_MAX;
 580                 }
 581                 setParam2(level & LEVELED_MASK);
 582         }
 583         return rest;
 584 }
 585
 586 u8 MapNode::addLevel(INodeDefManager *nodemgr, s8 add)
 587 {
 588         s8 level = getLevel(nodemgr);
 589         if (add == 0) level = 1;
 590         level += add;
 591         return setLevel(nodemgr, level);
 592 }
 593
 594 u32 MapNode::serializedLength(u8 version)
 595 {
 596         if(!ser_ver_supported(version))
 597                 throw VersionMismatchException("ERROR: MapNode format not supported");
 598
 599         if (version == 0)
 600                 return 1;
 601
 602         if (version <= 9)
 603                 return 2;
 604
 605         if (version <= 23)
 606                 return 3;
 607
 608         return 4;
 609 }
 610 void MapNode::serialize(u8 *dest, u8 version)
 611 {
 612         if(!ser_ver_supported(version))
 613                 throw VersionMismatchException("ERROR: MapNode format not supported");
 614
 615         // Can't do this anymore; we have 16-bit dynamically allocated node IDs
 616         // in memory; conversion just won't work in this direction.
 617         if(version < 24)
 618                 throw SerializationError("MapNode::serialize: serialization to "
 619                                 "version < 24 not possible");
 620
 621         writeU16(dest+0, param0);
 622         writeU8(dest+2, param1);
 623         writeU8(dest+3, param2);
 624 }
 625 void MapNode::deSerialize(u8 *source, u8 version)
 626 {
 627         if(!ser_ver_supported(version))
 628                 throw VersionMismatchException("ERROR: MapNode format not supported");
 629
 630         if(version <= 21)
 631         {
 632                 deSerialize_pre22(source, version);
 633                 return;
 634         }
 635
 636         if(version >= 24){
 637                 param0 = readU16(source+0);
 638                 param1 = readU8(source+2);
 639                 param2 = readU8(source+3);
 640         }else{
 641                 param0 = readU8(source+0);
 642                 param1 = readU8(source+1);
 643                 param2 = readU8(source+2);
 644                 if(param0 > 0x7F){
 645                         param0 |= ((param2&0xF0)<<4);
 646                         param2 &= 0x0F;
 647                 }
 648         }
 649 }
 650 void MapNode::serializeBulk(std::ostream &os, int version,
 651                 const MapNode *nodes, u32 nodecount,
 652                 u8 content_width, u8 params_width, bool compressed)
 653 {
 654         if (!ser_ver_supported(version))
 655                 throw VersionMismatchException("ERROR: MapNode format not supported");
 656
 657         sanity_check(content_width == 2);
 658         sanity_check(params_width == 2);
 659
 660         // Can't do this anymore; we have 16-bit dynamically allocated node IDs
 661         // in memory; conversion just won't work in this direction.
 662         if (version < 24)
 663                 throw SerializationError("MapNode::serializeBulk: serialization to "
 664                                 "version < 24 not possible");
 665
 666         size_t databuf_size = nodecount * (content_width + params_width);
 667         u8 *databuf = new u8[databuf_size];
 668
 669         u32 start1 = content_width * nodecount;
 670         u32 start2 = (content_width + 1) * nodecount;
 671
 672         // Serialize content
 673         for (u32 i = 0; i < nodecount; i++) {
 674                 writeU16(&databuf[i * 2], nodes[i].param0);
 675                 writeU8(&databuf[start1 + i], nodes[i].param1);
 676                 writeU8(&databuf[start2 + i], nodes[i].param2);
 677         }
 678
 679         /*
 680                 Compress data to output stream
 681         */
 682
 683         if (compressed)
 684                 compressZlib(databuf, databuf_size, os);
 685         else
 686                 os.write((const char*) &databuf[0], databuf_size);
 687
 688         delete [] databuf;
 689 }
 690
 691 // Deserialize bulk node data
 692 void MapNode::deSerializeBulk(std::istream &is, int version,
 693                 MapNode *nodes, u32 nodecount,
 694                 u8 content_width, u8 params_width, bool compressed)
 695 {
 696         if(!ser_ver_supported(version))
 697                 throw VersionMismatchException("ERROR: MapNode format not supported");
 698
 699         if (version < 22
 700                         || (content_width != 1 && content_width != 2)
 701                         || params_width != 2)
 702                 FATAL_ERROR("Deserialize bulk node data error");
 703
 704         // Uncompress or read data
 705         u32 len = nodecount * (content_width + params_width);
 706         SharedBuffer<u8> databuf(len);
 707         if(compressed)
 708         {
 709                 std::ostringstream os(std::ios_base::binary);
 710                 decompressZlib(is, os);
 711                 std::string s = os.str();
 712                 if(s.size() != len)
 713                         throw SerializationError("deSerializeBulkNodes: "
 714                                         "decompress resulted in invalid size");
 715                 memcpy(&databuf[0], s.c_str(), len);
 716         }
 717         else
 718         {
 719                 is.read((char*) &databuf[0], len);
 720                 if(is.eof() || is.fail())
 721                         throw SerializationError("deSerializeBulkNodes: "
 722                                         "failed to read bulk node data");
 723         }
 724
 725         // Deserialize content
 726         if(content_width == 1)
 727         {
 728                 for(u32 i=0; i<nodecount; i++)
 729                         nodes[i].param0 = readU8(&databuf[i]);
 730         }
 731         else if(content_width == 2)
 732         {
 733                 for(u32 i=0; i<nodecount; i++)
 734                         nodes[i].param0 = readU16(&databuf[i*2]);
 735         }
 736
 737         // Deserialize param1
 738         u32 start1 = content_width * nodecount;
 739         for(u32 i=0; i<nodecount; i++)
 740                 nodes[i].param1 = readU8(&databuf[start1 + i]);
 741
 742         // Deserialize param2
 743         u32 start2 = (content_width + 1) * nodecount;
 744         if(content_width == 1)
 745         {
 746                 for(u32 i=0; i<nodecount; i++) {
 747                         nodes[i].param2 = readU8(&databuf[start2 + i]);
 748                         if(nodes[i].param0 > 0x7F){
 749                                 nodes[i].param0 <<= 4;
 750                                 nodes[i].param0 |= (nodes[i].param2&0xF0)>>4;
 751                                 nodes[i].param2 &= 0x0F;
 752                         }
 753                 }
 754         }
 755         else if(content_width == 2)
 756         {
 757                 for(u32 i=0; i<nodecount; i++)
 758                         nodes[i].param2 = readU8(&databuf[start2 + i]);
 759         }
 760 }
 761
 762 /*
 763         Legacy serialization
 764 */
 765 void MapNode::deSerialize_pre22(const u8 *source, u8 version)
 766 {
 767         if(version <= 1)
 768         {
 769                 param0 = source[0];
 770         }
 771         else if(version <= 9)
 772         {
 773                 param0 = source[0];
 774                 param1 = source[1];
 775         }
 776         else
 777         {
 778                 param0 = source[0];
 779                 param1 = source[1];
 780                 param2 = source[2];
 781                 if(param0 > 0x7f){
 782                         param0 <<= 4;
 783                         param0 |= (param2&0xf0)>>4;
 784                         param2 &= 0x0f;
 785                 }
 786         }
 787
 788         // Convert special values from old version to new
 789         if(version <= 19)
 790         {
 791                 // In these versions, CONTENT_IGNORE and CONTENT_AIR
 792                 // are 255 and 254
 793                 // Version 19 is fucked up with sometimes the old values and sometimes not
 794                 if(param0 == 255)
 795                         param0 = CONTENT_IGNORE;
 796                 else if(param0 == 254)
 797                         param0 = CONTENT_AIR;
 798         }
 799
 800         // Translate to our known version
 801         *this = mapnode_translate_to_internal(*this, version);
 802 }