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 "content_mapnode.h" // For mapnode_translate_*_internal
  25 #include "serialization.h" // For ser_ver_supported
  26 #include "util/serialize.h"
  27 #include "log.h"
  28 #include "util/numeric.h"
  29 #include <string>
  30 #include <sstream>
  31
  32 static const Rotation wallmounted_to_rot[] = {
  33         ROTATE_0, ROTATE_180, ROTATE_90, ROTATE_270
  34 };
  35
  36 static const u8 rot_to_wallmounted[] = {
  37         2, 4, 3, 5
  38 };
  39
  40
  41 /*
  42         MapNode
  43 */
  44
  45 // Create directly from a nodename
  46 // If name is unknown, sets CONTENT_IGNORE
  47 MapNode::MapNode(INodeDefManager *ndef, const std::string &name,
  48                 u8 a_param1, u8 a_param2)
  49 {
  50         content_t id = CONTENT_IGNORE;
  51         ndef->getId(name, id);
  52         param0 = id;
  53         param1 = a_param1;
  54         param2 = a_param2;
  55 }
  56
  57 void MapNode::setLight(enum LightBank bank, u8 a_light, const ContentFeatures &f)
  58 {
  59         // If node doesn't contain light data, ignore this
  60         if(f.param_type != CPT_LIGHT)
  61                 return;
  62         if(bank == LIGHTBANK_DAY)
  63         {
  64                 param1 &= 0xf0;
  65                 param1 |= a_light & 0x0f;
  66         }
  67         else if(bank == LIGHTBANK_NIGHT)
  68         {
  69                 param1 &= 0x0f;
  70                 param1 |= (a_light & 0x0f)<<4;
  71         }
  72         else
  73                 assert("Invalid light bank" == NULL);
  74 }
  75
  76 void MapNode::setLight(enum LightBank bank, u8 a_light, INodeDefManager *nodemgr)
  77 {
  78         setLight(bank, a_light, nodemgr->get(*this));
  79 }
  80
  81 bool MapNode::isLightDayNightEq(INodeDefManager *nodemgr) const
  82 {
  83         const ContentFeatures &f = nodemgr->get(*this);
  84         bool isEqual;
  85
  86         if (f.param_type == CPT_LIGHT) {
  87                 u8 day   = MYMAX(f.light_source, param1 & 0x0f);
  88                 u8 night = MYMAX(f.light_source, (param1 >> 4) & 0x0f);
  89                 isEqual = day == night;
  90         } else {
  91                 isEqual = true;
  92         }
  93
  94         return isEqual;
  95 }
  96
  97 u8 MapNode::getLight(enum LightBank bank, INodeDefManager *nodemgr) const
  98 {
  99         // Select the brightest of [light source, propagated light]
 100         const ContentFeatures &f = nodemgr->get(*this);
 101
 102         u8 light;
 103         if(f.param_type == CPT_LIGHT)
 104                 light = bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f;
 105         else
 106                 light = 0;
 107
 108         return MYMAX(f.light_source, light);
 109 }
 110
 111 u8 MapNode::getLightRaw(enum LightBank bank, const ContentFeatures &f) const
 112 {
 113         if(f.param_type == CPT_LIGHT)
 114                 return bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f;
 115         return 0;
 116 }
 117
 118 u8 MapNode::getLightNoChecks(enum LightBank bank, const ContentFeatures *f) const
 119 {
 120         return MYMAX(f->light_source,
 121                      bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f);
 122 }
 123
 124 bool MapNode::getLightBanks(u8 &lightday, u8 &lightnight, INodeDefManager *nodemgr) const
 125 {
 126         // Select the brightest of [light source, propagated light]
 127         const ContentFeatures &f = nodemgr->get(*this);
 128         if(f.param_type == CPT_LIGHT)
 129         {
 130                 lightday = param1 & 0x0f;
 131                 lightnight = (param1>>4)&0x0f;
 132         }
 133         else
 134         {
 135                 lightday = 0;
 136                 lightnight = 0;
 137         }
 138         if(f.light_source > lightday)
 139                 lightday = f.light_source;
 140         if(f.light_source > lightnight)
 141                 lightnight = f.light_source;
 142         return f.param_type == CPT_LIGHT || f.light_source != 0;
 143 }
 144
 145 u8 MapNode::getFaceDir(INodeDefManager *nodemgr) const
 146 {
 147         const ContentFeatures &f = nodemgr->get(*this);
 148         if(f.param_type_2 == CPT2_FACEDIR)
 149                 return (getParam2() & 0x1F) % 24;
 150         return 0;
 151 }
 152
 153 u8 MapNode::getWallMounted(INodeDefManager *nodemgr) const
 154 {
 155         const ContentFeatures &f = nodemgr->get(*this);
 156         if(f.param_type_2 == CPT2_WALLMOUNTED)
 157                 return getParam2() & 0x07;
 158         return 0;
 159 }
 160
 161 v3s16 MapNode::getWallMountedDir(INodeDefManager *nodemgr) const
 162 {
 163         switch(getWallMounted(nodemgr))
 164         {
 165         case 0: default: return v3s16(0,1,0);
 166         case 1: return v3s16(0,-1,0);
 167         case 2: return v3s16(1,0,0);
 168         case 3: return v3s16(-1,0,0);
 169         case 4: return v3s16(0,0,1);
 170         case 5: return v3s16(0,0,-1);
 171         }
 172 }
 173
 174 void MapNode::rotateAlongYAxis(INodeDefManager *nodemgr, Rotation rot)
 175 {
 176         ContentParamType2 cpt2 = nodemgr->get(*this).param_type_2;
 177
 178         if (cpt2 == CPT2_FACEDIR) {
 179                 static const u8 rotate_facedir[24 * 4] = {
 180                         // Table value = rotated facedir
 181                         // Columns: 0, 90, 180, 270 degrees rotation around vertical axis
 182                         // Rotation is anticlockwise as seen from above (+Y)
 183
 184                         0, 1, 2, 3,  // Initial facedir 0 to 3
 185                         1, 2, 3, 0,
 186                         2, 3, 0, 1,
 187                         3, 0, 1, 2,
 188
 189                         4, 13, 10, 19,  // 4 to 7
 190                         5, 14, 11, 16,
 191                         6, 15, 8, 17,
 192                         7, 12, 9, 18,
 193
 194                         8, 17, 6, 15,  // 8 to 11
 195                         9, 18, 7, 12,
 196                         10, 19, 4, 13,
 197                         11, 16, 5, 14,
 198
 199                         12, 9, 18, 7,  // 12 to 15
 200                         13, 10, 19, 4,
 201                         14, 11, 16, 5,
 202                         15, 8, 17, 6,
 203
 204                         16, 5, 14, 11,  // 16 to 19
 205                         17, 6, 15, 8,
 206                         18, 7, 12, 9,
 207                         19, 4, 13, 10,
 208
 209                         20, 23, 22, 21,  // 20 to 23
 210                         21, 20, 23, 22,
 211                         22, 21, 20, 23,
 212                         23, 22, 21, 20
 213                 };
 214                 u8 facedir = (param2 & 31) % 24;
 215                 u8 index = facedir * 4 + rot;
 216                 param2 &= ~31;
 217                 param2 |= rotate_facedir[index];
 218         } else if (cpt2 == CPT2_WALLMOUNTED) {
 219                 u8 wmountface = (param2 & 7);
 220                 if (wmountface <= 1)
 221                         return;
 222
 223                 Rotation oldrot = wallmounted_to_rot[wmountface - 2];
 224                 param2 &= ~7;
 225                 param2 |= rot_to_wallmounted[(oldrot - rot) & 3];
 226         }
 227 }
 228
 229 void transformNodeBox(const MapNode &n, const NodeBox &nodebox,
 230                 INodeDefManager *nodemgr, std::vector<aabb3f> *p_boxes, u8 neighbors = 0)
 231 {
 232         std::vector<aabb3f> &boxes = *p_boxes;
 233
 234         if (nodebox.type == NODEBOX_FIXED || nodebox.type == NODEBOX_LEVELED) {
 235                 const std::vector<aabb3f> &fixed = nodebox.fixed;
 236                 int facedir = n.getFaceDir(nodemgr);
 237                 u8 axisdir = facedir>>2;
 238                 facedir&=0x03;
 239                 for(std::vector<aabb3f>::const_iterator
 240                                 i = fixed.begin();
 241                                 i != fixed.end(); ++i)
 242                 {
 243                         aabb3f box = *i;
 244
 245                         if (nodebox.type == NODEBOX_LEVELED) {
 246                                 box.MaxEdge.Y = -BS/2 + BS*((float)1/LEVELED_MAX) * n.getLevel(nodemgr);
 247                         }
 248
 249                         switch (axisdir)
 250                         {
 251                         case 0:
 252                                 if(facedir == 1)
 253                                 {
 254                                         box.MinEdge.rotateXZBy(-90);
 255                                         box.MaxEdge.rotateXZBy(-90);
 256                                 }
 257                                 else if(facedir == 2)
 258                                 {
 259                                         box.MinEdge.rotateXZBy(180);
 260                                         box.MaxEdge.rotateXZBy(180);
 261                                 }
 262                                 else if(facedir == 3)
 263                                 {
 264                                         box.MinEdge.rotateXZBy(90);
 265                                         box.MaxEdge.rotateXZBy(90);
 266                                 }
 267                                 break;
 268                         case 1: // z+
 269                                 box.MinEdge.rotateYZBy(90);
 270                                 box.MaxEdge.rotateYZBy(90);
 271                                 if(facedir == 1)
 272                                 {
 273                                         box.MinEdge.rotateXYBy(90);
 274                                         box.MaxEdge.rotateXYBy(90);
 275                                 }
 276                                 else if(facedir == 2)
 277                                 {
 278                                         box.MinEdge.rotateXYBy(180);
 279                                         box.MaxEdge.rotateXYBy(180);
 280                                 }
 281                                 else if(facedir == 3)
 282                                 {
 283                                         box.MinEdge.rotateXYBy(-90);
 284                                         box.MaxEdge.rotateXYBy(-90);
 285                                 }
 286                                 break;
 287                         case 2: //z-
 288                                 box.MinEdge.rotateYZBy(-90);
 289                                 box.MaxEdge.rotateYZBy(-90);
 290                                 if(facedir == 1)
 291                                 {
 292                                         box.MinEdge.rotateXYBy(-90);
 293                                         box.MaxEdge.rotateXYBy(-90);
 294                                 }
 295                                 else if(facedir == 2)
 296                                 {
 297                                         box.MinEdge.rotateXYBy(180);
 298                                         box.MaxEdge.rotateXYBy(180);
 299                                 }
 300                                 else if(facedir == 3)
 301                                 {
 302                                         box.MinEdge.rotateXYBy(90);
 303                                         box.MaxEdge.rotateXYBy(90);
 304                                 }
 305                                 break;
 306                         case 3:  //x+
 307                                 box.MinEdge.rotateXYBy(-90);
 308                                 box.MaxEdge.rotateXYBy(-90);
 309                                 if(facedir == 1)
 310                                 {
 311                                         box.MinEdge.rotateYZBy(90);
 312                                         box.MaxEdge.rotateYZBy(90);
 313                                 }
 314                                 else if(facedir == 2)
 315                                 {
 316                                         box.MinEdge.rotateYZBy(180);
 317                                         box.MaxEdge.rotateYZBy(180);
 318                                 }
 319                                 else if(facedir == 3)
 320                                 {
 321                                         box.MinEdge.rotateYZBy(-90);
 322                                         box.MaxEdge.rotateYZBy(-90);
 323                                 }
 324                                 break;
 325                         case 4:  //x-
 326                                 box.MinEdge.rotateXYBy(90);
 327                                 box.MaxEdge.rotateXYBy(90);
 328                                 if(facedir == 1)
 329                                 {
 330                                         box.MinEdge.rotateYZBy(-90);
 331                                         box.MaxEdge.rotateYZBy(-90);
 332                                 }
 333                                 else if(facedir == 2)
 334                                 {
 335                                         box.MinEdge.rotateYZBy(180);
 336                                         box.MaxEdge.rotateYZBy(180);
 337                                 }
 338                                 else if(facedir == 3)
 339                                 {
 340                                         box.MinEdge.rotateYZBy(90);
 341                                         box.MaxEdge.rotateYZBy(90);
 342                                 }
 343                                 break;
 344                         case 5:
 345                                 box.MinEdge.rotateXYBy(-180);
 346                                 box.MaxEdge.rotateXYBy(-180);
 347                                 if(facedir == 1)
 348                                 {
 349                                         box.MinEdge.rotateXZBy(90);
 350                                         box.MaxEdge.rotateXZBy(90);
 351                                 }
 352                                 else if(facedir == 2)
 353                                 {
 354                                         box.MinEdge.rotateXZBy(180);
 355                                         box.MaxEdge.rotateXZBy(180);
 356                                 }
 357                                 else if(facedir == 3)
 358                                 {
 359                                         box.MinEdge.rotateXZBy(-90);
 360                                         box.MaxEdge.rotateXZBy(-90);
 361                                 }
 362                                 break;
 363                         default:
 364                                 break;
 365                         }
 366                         box.repair();
 367                         boxes.push_back(box);
 368                 }
 369         }
 370         else if(nodebox.type == NODEBOX_WALLMOUNTED)
 371         {
 372                 v3s16 dir = n.getWallMountedDir(nodemgr);
 373
 374                 // top
 375                 if(dir == v3s16(0,1,0))
 376                 {
 377                         boxes.push_back(nodebox.wall_top);
 378                 }
 379                 // bottom
 380                 else if(dir == v3s16(0,-1,0))
 381                 {
 382                         boxes.push_back(nodebox.wall_bottom);
 383                 }
 384                 // side
 385                 else
 386                 {
 387                         v3f vertices[2] =
 388                         {
 389                                 nodebox.wall_side.MinEdge,
 390                                 nodebox.wall_side.MaxEdge
 391                         };
 392
 393                         for(s32 i=0; i<2; i++)
 394                         {
 395                                 if(dir == v3s16(-1,0,0))
 396                                         vertices[i].rotateXZBy(0);
 397                                 if(dir == v3s16(1,0,0))
 398                                         vertices[i].rotateXZBy(180);
 399                                 if(dir == v3s16(0,0,-1))
 400                                         vertices[i].rotateXZBy(90);
 401                                 if(dir == v3s16(0,0,1))
 402                                         vertices[i].rotateXZBy(-90);
 403                         }
 404
 405                         aabb3f box = aabb3f(vertices[0]);
 406                         box.addInternalPoint(vertices[1]);
 407                         boxes.push_back(box);
 408                 }
 409         }
 410         else if (nodebox.type == NODEBOX_CONNECTED)
 411         {
 412                 size_t boxes_size = boxes.size();
 413                 boxes_size += nodebox.fixed.size();
 414                 if (neighbors & 1)
 415                         boxes_size += nodebox.connect_top.size();
 416                 if (neighbors & 2)
 417                         boxes_size += nodebox.connect_bottom.size();
 418                 if (neighbors & 4)
 419                         boxes_size += nodebox.connect_front.size();
 420                 if (neighbors & 8)
 421                         boxes_size += nodebox.connect_left.size();
 422                 if (neighbors & 16)
 423                         boxes_size += nodebox.connect_back.size();
 424                 if (neighbors & 32)
 425                         boxes_size += nodebox.connect_right.size();
 426                 boxes.reserve(boxes_size);
 427
 428 #define BOXESPUSHBACK(c) do { \
 429                 for (std::vector<aabb3f>::const_iterator \
 430                                 it = (c).begin(); \
 431                                 it != (c).end(); ++it) \
 432                         (boxes).push_back(*it); \
 433                 } while (0)
 434
 435                 BOXESPUSHBACK(nodebox.fixed);
 436
 437                 if (neighbors & 1)
 438                         BOXESPUSHBACK(nodebox.connect_top);
 439                 if (neighbors & 2)
 440                         BOXESPUSHBACK(nodebox.connect_bottom);
 441                 if (neighbors & 4)
 442                         BOXESPUSHBACK(nodebox.connect_front);
 443                 if (neighbors & 8)
 444                         BOXESPUSHBACK(nodebox.connect_left);
 445                 if (neighbors & 16)
 446                         BOXESPUSHBACK(nodebox.connect_back);
 447                 if (neighbors & 32)
 448                         BOXESPUSHBACK(nodebox.connect_right);
 449         }
 450         else // NODEBOX_REGULAR
 451         {
 452                 boxes.push_back(aabb3f(-BS/2,-BS/2,-BS/2,BS/2,BS/2,BS/2));
 453         }
 454 }
 455
 456 void MapNode::getNodeBoxes(INodeDefManager *nodemgr, std::vector<aabb3f> *boxes, u8 neighbors)
 457 {
 458         const ContentFeatures &f = nodemgr->get(*this);
 459         transformNodeBox(*this, f.node_box, nodemgr, boxes, neighbors);
 460 }
 461
 462 void MapNode::getCollisionBoxes(INodeDefManager *nodemgr, std::vector<aabb3f> *boxes, u8 neighbors)
 463 {
 464         const ContentFeatures &f = nodemgr->get(*this);
 465         if (f.collision_box.fixed.empty())
 466                 transformNodeBox(*this, f.node_box, nodemgr, boxes, neighbors);
 467         else
 468                 transformNodeBox(*this, f.collision_box, nodemgr, boxes, neighbors);
 469 }
 470
 471 void MapNode::getSelectionBoxes(INodeDefManager *nodemgr, std::vector<aabb3f> *boxes, u8 neighbors)
 472 {
 473         const ContentFeatures &f = nodemgr->get(*this);
 474         transformNodeBox(*this, f.selection_box, nodemgr, boxes, neighbors);
 475 }
 476
 477 u8 MapNode::getMaxLevel(INodeDefManager *nodemgr) const
 478 {
 479         const ContentFeatures &f = nodemgr->get(*this);
 480         // todo: after update in all games leave only if (f.param_type_2 ==
 481         if( f.liquid_type == LIQUID_FLOWING || f.param_type_2 == CPT2_FLOWINGLIQUID)
 482                 return LIQUID_LEVEL_MAX;
 483         if(f.leveled || f.param_type_2 == CPT2_LEVELED)
 484                 return LEVELED_MAX;
 485         return 0;
 486 }
 487
 488 u8 MapNode::getLevel(INodeDefManager *nodemgr) const
 489 {
 490         const ContentFeatures &f = nodemgr->get(*this);
 491         // todo: after update in all games leave only if (f.param_type_2 ==
 492         if(f.liquid_type == LIQUID_SOURCE)
 493                 return LIQUID_LEVEL_SOURCE;
 494         if (f.param_type_2 == CPT2_FLOWINGLIQUID)
 495                 return getParam2() & LIQUID_LEVEL_MASK;
 496         if(f.liquid_type == LIQUID_FLOWING) // can remove if all param_type_2 setted
 497                 return getParam2() & LIQUID_LEVEL_MASK;
 498         if(f.leveled || f.param_type_2 == CPT2_LEVELED) {
 499                  u8 level = getParam2() & LEVELED_MASK;
 500                  if(level)
 501                         return level;
 502                  if(f.leveled > LEVELED_MAX)
 503                         return LEVELED_MAX;
 504                  return f.leveled; //default
 505         }
 506         return 0;
 507 }
 508
 509 u8 MapNode::setLevel(INodeDefManager *nodemgr, s8 level)
 510 {
 511         u8 rest = 0;
 512         if (level < 1) {
 513                 setContent(CONTENT_AIR);
 514                 return 0;
 515         }
 516         const ContentFeatures &f = nodemgr->get(*this);
 517         if (f.param_type_2 == CPT2_FLOWINGLIQUID
 518                 || f.liquid_type == LIQUID_FLOWING
 519                 || f.liquid_type == LIQUID_SOURCE) {
 520                 if (level >= LIQUID_LEVEL_SOURCE) {
 521                         rest = level - LIQUID_LEVEL_SOURCE;
 522                         setContent(nodemgr->getId(f.liquid_alternative_source));
 523                 } else {
 524                         setContent(nodemgr->getId(f.liquid_alternative_flowing));
 525                         setParam2(level & LIQUID_LEVEL_MASK);
 526                 }
 527         } else if (f.leveled || f.param_type_2 == CPT2_LEVELED) {
 528                 if (level > LEVELED_MAX) {
 529                         rest = level - LEVELED_MAX;
 530                         level = LEVELED_MAX;
 531                 }
 532                 setParam2(level & LEVELED_MASK);
 533         }
 534         return rest;
 535 }
 536
 537 u8 MapNode::addLevel(INodeDefManager *nodemgr, s8 add)
 538 {
 539         s8 level = getLevel(nodemgr);
 540         if (add == 0) level = 1;
 541         level += add;
 542         return setLevel(nodemgr, level);
 543 }
 544
 545 u32 MapNode::serializedLength(u8 version)
 546 {
 547         if(!ser_ver_supported(version))
 548                 throw VersionMismatchException("ERROR: MapNode format not supported");
 549
 550         if(version == 0)
 551                 return 1;
 552         else if(version <= 9)
 553                 return 2;
 554         else if(version <= 23)
 555                 return 3;
 556         else
 557                 return 4;
 558 }
 559 void MapNode::serialize(u8 *dest, u8 version)
 560 {
 561         if(!ser_ver_supported(version))
 562                 throw VersionMismatchException("ERROR: MapNode format not supported");
 563
 564         // Can't do this anymore; we have 16-bit dynamically allocated node IDs
 565         // in memory; conversion just won't work in this direction.
 566         if(version < 24)
 567                 throw SerializationError("MapNode::serialize: serialization to "
 568                                 "version < 24 not possible");
 569
 570         writeU16(dest+0, param0);
 571         writeU8(dest+2, param1);
 572         writeU8(dest+3, param2);
 573 }
 574 void MapNode::deSerialize(u8 *source, u8 version)
 575 {
 576         if(!ser_ver_supported(version))
 577                 throw VersionMismatchException("ERROR: MapNode format not supported");
 578
 579         if(version <= 21)
 580         {
 581                 deSerialize_pre22(source, version);
 582                 return;
 583         }
 584
 585         if(version >= 24){
 586                 param0 = readU16(source+0);
 587                 param1 = readU8(source+2);
 588                 param2 = readU8(source+3);
 589         }else{
 590                 param0 = readU8(source+0);
 591                 param1 = readU8(source+1);
 592                 param2 = readU8(source+2);
 593                 if(param0 > 0x7F){
 594                         param0 |= ((param2&0xF0)<<4);
 595                         param2 &= 0x0F;
 596                 }
 597         }
 598 }
 599 void MapNode::serializeBulk(std::ostream &os, int version,
 600                 const MapNode *nodes, u32 nodecount,
 601                 u8 content_width, u8 params_width, bool compressed)
 602 {
 603         if(!ser_ver_supported(version))
 604                 throw VersionMismatchException("ERROR: MapNode format not supported");
 605
 606         sanity_check(content_width == 2);
 607         sanity_check(params_width == 2);
 608
 609         // Can't do this anymore; we have 16-bit dynamically allocated node IDs
 610         // in memory; conversion just won't work in this direction.
 611         if(version < 24)
 612                 throw SerializationError("MapNode::serializeBulk: serialization to "
 613                                 "version < 24 not possible");
 614
 615         SharedBuffer<u8> databuf(nodecount * (content_width + params_width));
 616
 617         // Serialize content
 618         for(u32 i=0; i<nodecount; i++)
 619                 writeU16(&databuf[i*2], nodes[i].param0);
 620
 621         // Serialize param1
 622         u32 start1 = content_width * nodecount;
 623         for(u32 i=0; i<nodecount; i++)
 624                 writeU8(&databuf[start1 + i], nodes[i].param1);
 625
 626         // Serialize param2
 627         u32 start2 = (content_width + 1) * nodecount;
 628         for(u32 i=0; i<nodecount; i++)
 629                 writeU8(&databuf[start2 + i], nodes[i].param2);
 630
 631         /*
 632                 Compress data to output stream
 633         */
 634
 635         if(compressed)
 636         {
 637                 compressZlib(databuf, os);
 638         }
 639         else
 640         {
 641                 os.write((const char*) &databuf[0], databuf.getSize());
 642         }
 643 }
 644
 645 // Deserialize bulk node data
 646 void MapNode::deSerializeBulk(std::istream &is, int version,
 647                 MapNode *nodes, u32 nodecount,
 648                 u8 content_width, u8 params_width, bool compressed)
 649 {
 650         if(!ser_ver_supported(version))
 651                 throw VersionMismatchException("ERROR: MapNode format not supported");
 652
 653         if (version < 22
 654                         || (content_width != 1 && content_width != 2)
 655                         || params_width != 2)
 656                 FATAL_ERROR("Deserialize bulk node data error");
 657
 658         // Uncompress or read data
 659         u32 len = nodecount * (content_width + params_width);
 660         SharedBuffer<u8> databuf(len);
 661         if(compressed)
 662         {
 663                 std::ostringstream os(std::ios_base::binary);
 664                 decompressZlib(is, os);
 665                 std::string s = os.str();
 666                 if(s.size() != len)
 667                         throw SerializationError("deSerializeBulkNodes: "
 668                                         "decompress resulted in invalid size");
 669                 memcpy(&databuf[0], s.c_str(), len);
 670         }
 671         else
 672         {
 673                 is.read((char*) &databuf[0], len);
 674                 if(is.eof() || is.fail())
 675                         throw SerializationError("deSerializeBulkNodes: "
 676                                         "failed to read bulk node data");
 677         }
 678
 679         // Deserialize content
 680         if(content_width == 1)
 681         {
 682                 for(u32 i=0; i<nodecount; i++)
 683                         nodes[i].param0 = readU8(&databuf[i]);
 684         }
 685         else if(content_width == 2)
 686         {
 687                 for(u32 i=0; i<nodecount; i++)
 688                         nodes[i].param0 = readU16(&databuf[i*2]);
 689         }
 690
 691         // Deserialize param1
 692         u32 start1 = content_width * nodecount;
 693         for(u32 i=0; i<nodecount; i++)
 694                 nodes[i].param1 = readU8(&databuf[start1 + i]);
 695
 696         // Deserialize param2
 697         u32 start2 = (content_width + 1) * nodecount;
 698         if(content_width == 1)
 699         {
 700                 for(u32 i=0; i<nodecount; i++) {
 701                         nodes[i].param2 = readU8(&databuf[start2 + i]);
 702                         if(nodes[i].param0 > 0x7F){
 703                                 nodes[i].param0 <<= 4;
 704                                 nodes[i].param0 |= (nodes[i].param2&0xF0)>>4;
 705                                 nodes[i].param2 &= 0x0F;
 706                         }
 707                 }
 708         }
 709         else if(content_width == 2)
 710         {
 711                 for(u32 i=0; i<nodecount; i++)
 712                         nodes[i].param2 = readU8(&databuf[start2 + i]);
 713         }
 714 }
 715
 716 /*
 717         Legacy serialization
 718 */
 719 void MapNode::deSerialize_pre22(u8 *source, u8 version)
 720 {
 721         if(version <= 1)
 722         {
 723                 param0 = source[0];
 724         }
 725         else if(version <= 9)
 726         {
 727                 param0 = source[0];
 728                 param1 = source[1];
 729         }
 730         else
 731         {
 732                 param0 = source[0];
 733                 param1 = source[1];
 734                 param2 = source[2];
 735                 if(param0 > 0x7f){
 736                         param0 <<= 4;
 737                         param0 |= (param2&0xf0)>>4;
 738                         param2 &= 0x0f;
 739                 }
 740         }
 741
 742         // Convert special values from old version to new
 743         if(version <= 19)
 744         {
 745                 // In these versions, CONTENT_IGNORE and CONTENT_AIR
 746                 // are 255 and 254
 747                 // Version 19 is fucked up with sometimes the old values and sometimes not
 748                 if(param0 == 255)
 749                         param0 = CONTENT_IGNORE;
 750                 else if(param0 == 254)
 751                         param0 = CONTENT_AIR;
 752         }
 753
 754         // Translate to our known version
 755         *this = mapnode_translate_to_internal(*this, version);
 756 }