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/directiontables.h"
  30 #include "util/numeric.h"
  31 #include <string>
  32 #include <sstream>
  33
  34 static const Rotation wallmounted_to_rot[] = {
  35         ROTATE_0, ROTATE_180, ROTATE_90, ROTATE_270
  36 };
  37
  38 static const u8 rot_to_wallmounted[] = {
  39         2, 4, 3, 5
  40 };
  41
  42
  43 /*
  44         MapNode
  45 */
  46
  47 // Create directly from a nodename
  48 // If name is unknown, sets CONTENT_IGNORE
  49 MapNode::MapNode(const NodeDefManager *ndef, const std::string &name,
  50                 u8 a_param1, u8 a_param2)
  51 {
  52         content_t id = CONTENT_IGNORE;
  53         ndef->getId(name, id);
  54         param0 = id;
  55         param1 = a_param1;
  56         param2 = a_param2;
  57 }
  58
  59 void MapNode::getColor(const ContentFeatures &f, video::SColor *color) const
  60 {
  61         if (f.palette) {
  62                 *color = (*f.palette)[param2];
  63                 return;
  64         }
  65         *color = f.color;
  66 }
  67
  68 void MapNode::setLight(LightBank bank, u8 a_light, const ContentFeatures &f) noexcept
  69 {
  70         // If node doesn't contain light data, ignore this
  71         if(f.param_type != CPT_LIGHT)
  72                 return;
  73         if(bank == LIGHTBANK_DAY)
  74         {
  75                 param1 &= 0xf0;
  76                 param1 |= a_light & 0x0f;
  77         }
  78         else if(bank == LIGHTBANK_NIGHT)
  79         {
  80                 param1 &= 0x0f;
  81                 param1 |= (a_light & 0x0f)<<4;
  82         }
  83         else
  84                 assert("Invalid light bank" == NULL);
  85 }
  86
  87 void MapNode::setLight(LightBank bank, u8 a_light, const NodeDefManager *nodemgr)
  88 {
  89         setLight(bank, a_light, nodemgr->get(*this));
  90 }
  91
  92 bool MapNode::isLightDayNightEq(const NodeDefManager *nodemgr) const
  93 {
  94         const ContentFeatures &f = nodemgr->get(*this);
  95         bool isEqual;
  96
  97         if (f.param_type == CPT_LIGHT) {
  98                 u8 day   = MYMAX(f.light_source, param1 & 0x0f);
  99                 u8 night = MYMAX(f.light_source, (param1 >> 4) & 0x0f);
 100                 isEqual = day == night;
 101         } else {
 102                 isEqual = true;
 103         }
 104
 105         return isEqual;
 106 }
 107
 108 u8 MapNode::getLight(LightBank bank, const NodeDefManager *nodemgr) const
 109 {
 110         // Select the brightest of [light source, propagated light]
 111         const ContentFeatures &f = nodemgr->get(*this);
 112
 113         u8 light;
 114         if(f.param_type == CPT_LIGHT)
 115                 light = bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f;
 116         else
 117                 light = 0;
 118
 119         return MYMAX(f.light_source, light);
 120 }
 121
 122 u8 MapNode::getLightRaw(LightBank bank, const ContentFeatures &f) const noexcept
 123 {
 124         if(f.param_type == CPT_LIGHT)
 125                 return bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f;
 126         return 0;
 127 }
 128
 129 u8 MapNode::getLightNoChecks(LightBank bank, const ContentFeatures *f) const noexcept
 130 {
 131         return MYMAX(f->light_source,
 132                      bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f);
 133 }
 134
 135 bool MapNode::getLightBanks(u8 &lightday, u8 &lightnight,
 136         const NodeDefManager *nodemgr) const
 137 {
 138         // Select the brightest of [light source, propagated light]
 139         const ContentFeatures &f = nodemgr->get(*this);
 140         if(f.param_type == CPT_LIGHT)
 141         {
 142                 lightday = param1 & 0x0f;
 143                 lightnight = (param1>>4)&0x0f;
 144         }
 145         else
 146         {
 147                 lightday = 0;
 148                 lightnight = 0;
 149         }
 150         if(f.light_source > lightday)
 151                 lightday = f.light_source;
 152         if(f.light_source > lightnight)
 153                 lightnight = f.light_source;
 154         return f.param_type == CPT_LIGHT || f.light_source != 0;
 155 }
 156
 157 u8 MapNode::getFaceDir(const NodeDefManager *nodemgr,
 158         bool allow_wallmounted) const
 159 {
 160         const ContentFeatures &f = nodemgr->get(*this);
 161         if (f.param_type_2 == CPT2_FACEDIR ||
 162                         f.param_type_2 == CPT2_COLORED_FACEDIR)
 163                 return (getParam2() & 0x1F) % 24;
 164         if (allow_wallmounted && (f.param_type_2 == CPT2_WALLMOUNTED ||
 165                         f.param_type_2 == CPT2_COLORED_WALLMOUNTED))
 166                 return wallmounted_to_facedir[getParam2() & 0x07];
 167         return 0;
 168 }
 169
 170 u8 MapNode::getWallMounted(const NodeDefManager *nodemgr) const
 171 {
 172         const ContentFeatures &f = nodemgr->get(*this);
 173         if (f.param_type_2 == CPT2_WALLMOUNTED ||
 174                         f.param_type_2 == CPT2_COLORED_WALLMOUNTED)
 175                 return getParam2() & 0x07;
 176         return 0;
 177 }
 178
 179 v3s16 MapNode::getWallMountedDir(const NodeDefManager *nodemgr) const
 180 {
 181         switch(getWallMounted(nodemgr))
 182         {
 183         case 0: default: return v3s16(0,1,0);
 184         case 1: return v3s16(0,-1,0);
 185         case 2: return v3s16(1,0,0);
 186         case 3: return v3s16(-1,0,0);
 187         case 4: return v3s16(0,0,1);
 188         case 5: return v3s16(0,0,-1);
 189         }
 190 }
 191
 192 void MapNode::rotateAlongYAxis(const NodeDefManager *nodemgr, Rotation rot)
 193 {
 194         ContentParamType2 cpt2 = nodemgr->get(*this).param_type_2;
 195
 196         if (cpt2 == CPT2_FACEDIR || cpt2 == CPT2_COLORED_FACEDIR) {
 197                 static const u8 rotate_facedir[24 * 4] = {
 198                         // Table value = rotated facedir
 199                         // Columns: 0, 90, 180, 270 degrees rotation around vertical axis
 200                         // Rotation is anticlockwise as seen from above (+Y)
 201
 202                         0, 1, 2, 3,  // Initial facedir 0 to 3
 203                         1, 2, 3, 0,
 204                         2, 3, 0, 1,
 205                         3, 0, 1, 2,
 206
 207                         4, 13, 10, 19,  // 4 to 7
 208                         5, 14, 11, 16,
 209                         6, 15, 8, 17,
 210                         7, 12, 9, 18,
 211
 212                         8, 17, 6, 15,  // 8 to 11
 213                         9, 18, 7, 12,
 214                         10, 19, 4, 13,
 215                         11, 16, 5, 14,
 216
 217                         12, 9, 18, 7,  // 12 to 15
 218                         13, 10, 19, 4,
 219                         14, 11, 16, 5,
 220                         15, 8, 17, 6,
 221
 222                         16, 5, 14, 11,  // 16 to 19
 223                         17, 6, 15, 8,
 224                         18, 7, 12, 9,
 225                         19, 4, 13, 10,
 226
 227                         20, 23, 22, 21,  // 20 to 23
 228                         21, 20, 23, 22,
 229                         22, 21, 20, 23,
 230                         23, 22, 21, 20
 231                 };
 232                 u8 facedir = (param2 & 31) % 24;
 233                 u8 index = facedir * 4 + rot;
 234                 param2 &= ~31;
 235                 param2 |= rotate_facedir[index];
 236         } else if (cpt2 == CPT2_WALLMOUNTED ||
 237                         cpt2 == CPT2_COLORED_WALLMOUNTED) {
 238                 u8 wmountface = (param2 & 7);
 239                 if (wmountface <= 1)
 240                         return;
 241
 242                 Rotation oldrot = wallmounted_to_rot[wmountface - 2];
 243                 param2 &= ~7;
 244                 param2 |= rot_to_wallmounted[(oldrot - rot) & 3];
 245         }
 246 }
 247
 248 void transformNodeBox(const MapNode &n, const NodeBox &nodebox,
 249         const NodeDefManager *nodemgr, std::vector<aabb3f> *p_boxes,
 250         u8 neighbors = 0)
 251 {
 252         std::vector<aabb3f> &boxes = *p_boxes;
 253
 254         if (nodebox.type == NODEBOX_FIXED || nodebox.type == NODEBOX_LEVELED) {
 255                 const std::vector<aabb3f> &fixed = nodebox.fixed;
 256                 int facedir = n.getFaceDir(nodemgr, true);
 257                 u8 axisdir = facedir>>2;
 258                 facedir&=0x03;
 259                 for (aabb3f box : fixed) {
 260                         if (nodebox.type == NODEBOX_LEVELED)
 261                                 box.MaxEdge.Y = (-0.5f + n.getLevel(nodemgr) / 64.0f) * BS;
 262
 263                         switch (axisdir) {
 264                         case 0:
 265                                 if(facedir == 1)
 266                                 {
 267                                         box.MinEdge.rotateXZBy(-90);
 268                                         box.MaxEdge.rotateXZBy(-90);
 269                                 }
 270                                 else if(facedir == 2)
 271                                 {
 272                                         box.MinEdge.rotateXZBy(180);
 273                                         box.MaxEdge.rotateXZBy(180);
 274                                 }
 275                                 else if(facedir == 3)
 276                                 {
 277                                         box.MinEdge.rotateXZBy(90);
 278                                         box.MaxEdge.rotateXZBy(90);
 279                                 }
 280                                 break;
 281                         case 1: // z+
 282                                 box.MinEdge.rotateYZBy(90);
 283                                 box.MaxEdge.rotateYZBy(90);
 284                                 if(facedir == 1)
 285                                 {
 286                                         box.MinEdge.rotateXYBy(90);
 287                                         box.MaxEdge.rotateXYBy(90);
 288                                 }
 289                                 else if(facedir == 2)
 290                                 {
 291                                         box.MinEdge.rotateXYBy(180);
 292                                         box.MaxEdge.rotateXYBy(180);
 293                                 }
 294                                 else if(facedir == 3)
 295                                 {
 296                                         box.MinEdge.rotateXYBy(-90);
 297                                         box.MaxEdge.rotateXYBy(-90);
 298                                 }
 299                                 break;
 300                         case 2: //z-
 301                                 box.MinEdge.rotateYZBy(-90);
 302                                 box.MaxEdge.rotateYZBy(-90);
 303                                 if(facedir == 1)
 304                                 {
 305                                         box.MinEdge.rotateXYBy(-90);
 306                                         box.MaxEdge.rotateXYBy(-90);
 307                                 }
 308                                 else if(facedir == 2)
 309                                 {
 310                                         box.MinEdge.rotateXYBy(180);
 311                                         box.MaxEdge.rotateXYBy(180);
 312                                 }
 313                                 else if(facedir == 3)
 314                                 {
 315                                         box.MinEdge.rotateXYBy(90);
 316                                         box.MaxEdge.rotateXYBy(90);
 317                                 }
 318                                 break;
 319                         case 3:  //x+
 320                                 box.MinEdge.rotateXYBy(-90);
 321                                 box.MaxEdge.rotateXYBy(-90);
 322                                 if(facedir == 1)
 323                                 {
 324                                         box.MinEdge.rotateYZBy(90);
 325                                         box.MaxEdge.rotateYZBy(90);
 326                                 }
 327                                 else if(facedir == 2)
 328                                 {
 329                                         box.MinEdge.rotateYZBy(180);
 330                                         box.MaxEdge.rotateYZBy(180);
 331                                 }
 332                                 else if(facedir == 3)
 333                                 {
 334                                         box.MinEdge.rotateYZBy(-90);
 335                                         box.MaxEdge.rotateYZBy(-90);
 336                                 }
 337                                 break;
 338                         case 4:  //x-
 339                                 box.MinEdge.rotateXYBy(90);
 340                                 box.MaxEdge.rotateXYBy(90);
 341                                 if(facedir == 1)
 342                                 {
 343                                         box.MinEdge.rotateYZBy(-90);
 344                                         box.MaxEdge.rotateYZBy(-90);
 345                                 }
 346                                 else if(facedir == 2)
 347                                 {
 348                                         box.MinEdge.rotateYZBy(180);
 349                                         box.MaxEdge.rotateYZBy(180);
 350                                 }
 351                                 else if(facedir == 3)
 352                                 {
 353                                         box.MinEdge.rotateYZBy(90);
 354                                         box.MaxEdge.rotateYZBy(90);
 355                                 }
 356                                 break;
 357                         case 5:
 358                                 box.MinEdge.rotateXYBy(-180);
 359                                 box.MaxEdge.rotateXYBy(-180);
 360                                 if(facedir == 1)
 361                                 {
 362                                         box.MinEdge.rotateXZBy(90);
 363                                         box.MaxEdge.rotateXZBy(90);
 364                                 }
 365                                 else if(facedir == 2)
 366                                 {
 367                                         box.MinEdge.rotateXZBy(180);
 368                                         box.MaxEdge.rotateXZBy(180);
 369                                 }
 370                                 else if(facedir == 3)
 371                                 {
 372                                         box.MinEdge.rotateXZBy(-90);
 373                                         box.MaxEdge.rotateXZBy(-90);
 374                                 }
 375                                 break;
 376                         default:
 377                                 break;
 378                         }
 379                         box.repair();
 380                         boxes.push_back(box);
 381                 }
 382         }
 383         else if(nodebox.type == NODEBOX_WALLMOUNTED)
 384         {
 385                 v3s16 dir = n.getWallMountedDir(nodemgr);
 386
 387                 // top
 388                 if(dir == v3s16(0,1,0))
 389                 {
 390                         boxes.push_back(nodebox.wall_top);
 391                 }
 392                 // bottom
 393                 else if(dir == v3s16(0,-1,0))
 394                 {
 395                         boxes.push_back(nodebox.wall_bottom);
 396                 }
 397                 // side
 398                 else
 399                 {
 400                         v3f vertices[2] =
 401                         {
 402                                 nodebox.wall_side.MinEdge,
 403                                 nodebox.wall_side.MaxEdge
 404                         };
 405
 406                         for (v3f &vertex : vertices) {
 407                                 if(dir == v3s16(-1,0,0))
 408                                         vertex.rotateXZBy(0);
 409                                 if(dir == v3s16(1,0,0))
 410                                         vertex.rotateXZBy(180);
 411                                 if(dir == v3s16(0,0,-1))
 412                                         vertex.rotateXZBy(90);
 413                                 if(dir == v3s16(0,0,1))
 414                                         vertex.rotateXZBy(-90);
 415                         }
 416
 417                         aabb3f box = aabb3f(vertices[0]);
 418                         box.addInternalPoint(vertices[1]);
 419                         boxes.push_back(box);
 420                 }
 421         }
 422         else if (nodebox.type == NODEBOX_CONNECTED)
 423         {
 424                 size_t boxes_size = boxes.size();
 425                 boxes_size += nodebox.fixed.size();
 426                 if (neighbors & 1)
 427                         boxes_size += nodebox.connect_top.size();
 428                 else
 429                         boxes_size += nodebox.disconnected_top.size();
 430
 431                 if (neighbors & 2)
 432                         boxes_size += nodebox.connect_bottom.size();
 433                 else
 434                         boxes_size += nodebox.disconnected_bottom.size();
 435
 436                 if (neighbors & 4)
 437                         boxes_size += nodebox.connect_front.size();
 438                 else
 439                         boxes_size += nodebox.disconnected_front.size();
 440
 441                 if (neighbors & 8)
 442                         boxes_size += nodebox.connect_left.size();
 443                 else
 444                         boxes_size += nodebox.disconnected_left.size();
 445
 446                 if (neighbors & 16)
 447                         boxes_size += nodebox.connect_back.size();
 448                 else
 449                         boxes_size += nodebox.disconnected_back.size();
 450
 451                 if (neighbors & 32)
 452                         boxes_size += nodebox.connect_right.size();
 453                 else
 454                         boxes_size += nodebox.disconnected_right.size();
 455
 456                 if (neighbors == 0)
 457                         boxes_size += nodebox.disconnected.size();
 458
 459                 if (neighbors < 4)
 460                         boxes_size += nodebox.disconnected_sides.size();
 461
 462                 boxes.reserve(boxes_size);
 463
 464 #define BOXESPUSHBACK(c) \
 465                 for (std::vector<aabb3f>::const_iterator \
 466                                 it = (c).begin(); \
 467                                 it != (c).end(); ++it) \
 468                         (boxes).push_back(*it);
 469
 470                 BOXESPUSHBACK(nodebox.fixed);
 471
 472                 if (neighbors & 1) {
 473                         BOXESPUSHBACK(nodebox.connect_top);
 474                 } else {
 475                         BOXESPUSHBACK(nodebox.disconnected_top);
 476                 }
 477
 478                 if (neighbors & 2) {
 479                         BOXESPUSHBACK(nodebox.connect_bottom);
 480                 } else {
 481                         BOXESPUSHBACK(nodebox.disconnected_bottom);
 482                 }
 483
 484                 if (neighbors & 4) {
 485                         BOXESPUSHBACK(nodebox.connect_front);
 486                 } else {
 487                         BOXESPUSHBACK(nodebox.disconnected_front);
 488                 }
 489
 490                 if (neighbors & 8) {
 491                         BOXESPUSHBACK(nodebox.connect_left);
 492                 } else {
 493                         BOXESPUSHBACK(nodebox.disconnected_left);
 494                 }
 495
 496                 if (neighbors & 16) {
 497                         BOXESPUSHBACK(nodebox.connect_back);
 498                 } else {
 499                         BOXESPUSHBACK(nodebox.disconnected_back);
 500                 }
 501
 502                 if (neighbors & 32) {
 503                         BOXESPUSHBACK(nodebox.connect_right);
 504                 } else {
 505                         BOXESPUSHBACK(nodebox.disconnected_right);
 506                 }
 507
 508                 if (neighbors == 0) {
 509                         BOXESPUSHBACK(nodebox.disconnected);
 510                 }
 511
 512                 if (neighbors < 4) {
 513                         BOXESPUSHBACK(nodebox.disconnected_sides);
 514                 }
 515
 516         }
 517         else // NODEBOX_REGULAR
 518         {
 519                 boxes.emplace_back(-BS/2,-BS/2,-BS/2,BS/2,BS/2,BS/2);
 520         }
 521 }
 522
 523 static inline void getNeighborConnectingFace(
 524         const v3s16 &p, const NodeDefManager *nodedef,
 525         Map *map, MapNode n, u8 bitmask, u8 *neighbors)
 526 {
 527         MapNode n2 = map->getNodeNoEx(p);
 528         if (nodedef->nodeboxConnects(n, n2, bitmask))
 529                 *neighbors |= bitmask;
 530 }
 531
 532 u8 MapNode::getNeighbors(v3s16 p, Map *map) const
 533 {
 534         const NodeDefManager *nodedef = map->getNodeDefManager();
 535         u8 neighbors = 0;
 536         const ContentFeatures &f = nodedef->get(*this);
 537         // locate possible neighboring nodes to connect to
 538         if (f.drawtype == NDT_NODEBOX && f.node_box.type == NODEBOX_CONNECTED) {
 539                 v3s16 p2 = p;
 540
 541                 p2.Y++;
 542                 getNeighborConnectingFace(p2, nodedef, map, *this, 1, &neighbors);
 543
 544                 p2 = p;
 545                 p2.Y--;
 546                 getNeighborConnectingFace(p2, nodedef, map, *this, 2, &neighbors);
 547
 548                 p2 = p;
 549                 p2.Z--;
 550                 getNeighborConnectingFace(p2, nodedef, map, *this, 4, &neighbors);
 551
 552                 p2 = p;
 553                 p2.X--;
 554                 getNeighborConnectingFace(p2, nodedef, map, *this, 8, &neighbors);
 555
 556                 p2 = p;
 557                 p2.Z++;
 558                 getNeighborConnectingFace(p2, nodedef, map, *this, 16, &neighbors);
 559
 560                 p2 = p;
 561                 p2.X++;
 562                 getNeighborConnectingFace(p2, nodedef, map, *this, 32, &neighbors);
 563         }
 564
 565         return neighbors;
 566 }
 567
 568 void MapNode::getNodeBoxes(const NodeDefManager *nodemgr,
 569         std::vector<aabb3f> *boxes, u8 neighbors) const
 570 {
 571         const ContentFeatures &f = nodemgr->get(*this);
 572         transformNodeBox(*this, f.node_box, nodemgr, boxes, neighbors);
 573 }
 574
 575 void MapNode::getCollisionBoxes(const NodeDefManager *nodemgr,
 576         std::vector<aabb3f> *boxes, u8 neighbors) const
 577 {
 578         const ContentFeatures &f = nodemgr->get(*this);
 579         if (f.collision_box.fixed.empty())
 580                 transformNodeBox(*this, f.node_box, nodemgr, boxes, neighbors);
 581         else
 582                 transformNodeBox(*this, f.collision_box, nodemgr, boxes, neighbors);
 583 }
 584
 585 void MapNode::getSelectionBoxes(const NodeDefManager *nodemgr,
 586         std::vector<aabb3f> *boxes, u8 neighbors) const
 587 {
 588         const ContentFeatures &f = nodemgr->get(*this);
 589         transformNodeBox(*this, f.selection_box, nodemgr, boxes, neighbors);
 590 }
 591
 592 u8 MapNode::getMaxLevel(const NodeDefManager *nodemgr) const
 593 {
 594         const ContentFeatures &f = nodemgr->get(*this);
 595         // todo: after update in all games leave only if (f.param_type_2 ==
 596         if( f.liquid_type == LIQUID_FLOWING || f.param_type_2 == CPT2_FLOWINGLIQUID)
 597                 return LIQUID_LEVEL_MAX;
 598         if(f.leveled || f.param_type_2 == CPT2_LEVELED)
 599                 return LEVELED_MAX;
 600         return 0;
 601 }
 602
 603 u8 MapNode::getLevel(const NodeDefManager *nodemgr) const
 604 {
 605         const ContentFeatures &f = nodemgr->get(*this);
 606         // todo: after update in all games leave only if (f.param_type_2 ==
 607         if(f.liquid_type == LIQUID_SOURCE)
 608                 return LIQUID_LEVEL_SOURCE;
 609         if (f.param_type_2 == CPT2_FLOWINGLIQUID)
 610                 return getParam2() & LIQUID_LEVEL_MASK;
 611         if(f.liquid_type == LIQUID_FLOWING) // can remove if all param_type_2 setted
 612                 return getParam2() & LIQUID_LEVEL_MASK;
 613         if (f.param_type_2 == CPT2_LEVELED) {
 614                 u8 level = getParam2() & LEVELED_MASK;
 615                 if (level)
 616                         return level;
 617         }
 618         if (f.leveled > LEVELED_MAX)
 619                 return LEVELED_MAX;
 620         return f.leveled;
 621 }
 622
 623 u8 MapNode::setLevel(const NodeDefManager *nodemgr, s8 level)
 624 {
 625         u8 rest = 0;
 626         const ContentFeatures &f = nodemgr->get(*this);
 627         if (f.param_type_2 == CPT2_FLOWINGLIQUID
 628                         || f.liquid_type == LIQUID_FLOWING
 629                         || f.liquid_type == LIQUID_SOURCE) {
 630                 if (level <= 0) { // liquid can’t exist with zero level
 631                         setContent(CONTENT_AIR);
 632                         return 0;
 633                 }
 634                 if (level >= LIQUID_LEVEL_SOURCE) {
 635                         rest = level - LIQUID_LEVEL_SOURCE;
 636                         setContent(nodemgr->getId(f.liquid_alternative_source));
 637                         setParam2(0);
 638                 } else {
 639                         setContent(nodemgr->getId(f.liquid_alternative_flowing));
 640                         setParam2((level & LIQUID_LEVEL_MASK) | (getParam2() & ~LIQUID_LEVEL_MASK));
 641                 }
 642         } else if (f.param_type_2 == CPT2_LEVELED) {
 643                 if (level < 0) { // zero means default for a leveled nodebox
 644                         rest = level;
 645                         level = 0;
 646                 } else if (level > LEVELED_MAX) {
 647                         rest = level - LEVELED_MAX;
 648                         level = LEVELED_MAX;
 649                 }
 650                 setParam2((level & LEVELED_MASK) | (getParam2() & ~LEVELED_MASK));
 651         }
 652         return rest;
 653 }
 654
 655 u8 MapNode::addLevel(const NodeDefManager *nodemgr, s8 add)
 656 {
 657         s8 level = getLevel(nodemgr);
 658         level += add;
 659         return setLevel(nodemgr, level);
 660 }
 661
 662 u32 MapNode::serializedLength(u8 version)
 663 {
 664         if(!ser_ver_supported(version))
 665                 throw VersionMismatchException("ERROR: MapNode format not supported");
 666
 667         if (version == 0)
 668                 return 1;
 669
 670         if (version <= 9)
 671                 return 2;
 672
 673         if (version <= 23)
 674                 return 3;
 675
 676         return 4;
 677 }
 678 void MapNode::serialize(u8 *dest, u8 version) const
 679 {
 680         if(!ser_ver_supported(version))
 681                 throw VersionMismatchException("ERROR: MapNode format not supported");
 682
 683         // Can't do this anymore; we have 16-bit dynamically allocated node IDs
 684         // in memory; conversion just won't work in this direction.
 685         if(version < 24)
 686                 throw SerializationError("MapNode::serialize: serialization to "
 687                                 "version < 24 not possible");
 688
 689         writeU16(dest+0, param0);
 690         writeU8(dest+2, param1);
 691         writeU8(dest+3, param2);
 692 }
 693 void MapNode::deSerialize(u8 *source, u8 version)
 694 {
 695         if(!ser_ver_supported(version))
 696                 throw VersionMismatchException("ERROR: MapNode format not supported");
 697
 698         if(version <= 21)
 699         {
 700                 deSerialize_pre22(source, version);
 701                 return;
 702         }
 703
 704         if(version >= 24){
 705                 param0 = readU16(source+0);
 706                 param1 = readU8(source+2);
 707                 param2 = readU8(source+3);
 708         }else{
 709                 param0 = readU8(source+0);
 710                 param1 = readU8(source+1);
 711                 param2 = readU8(source+2);
 712                 if(param0 > 0x7F){
 713                         param0 |= ((param2&0xF0)<<4);
 714                         param2 &= 0x0F;
 715                 }
 716         }
 717 }
 718 void MapNode::serializeBulk(std::ostream &os, int version,
 719                 const MapNode *nodes, u32 nodecount,
 720                 u8 content_width, u8 params_width, bool compressed)
 721 {
 722         if (!ser_ver_supported(version))
 723                 throw VersionMismatchException("ERROR: MapNode format not supported");
 724
 725         sanity_check(content_width == 2);
 726         sanity_check(params_width == 2);
 727
 728         // Can't do this anymore; we have 16-bit dynamically allocated node IDs
 729         // in memory; conversion just won't work in this direction.
 730         if (version < 24)
 731                 throw SerializationError("MapNode::serializeBulk: serialization to "
 732                                 "version < 24 not possible");
 733
 734         size_t databuf_size = nodecount * (content_width + params_width);
 735         u8 *databuf = new u8[databuf_size];
 736
 737         u32 start1 = content_width * nodecount;
 738         u32 start2 = (content_width + 1) * nodecount;
 739
 740         // Serialize content
 741         for (u32 i = 0; i < nodecount; i++) {
 742                 writeU16(&databuf[i * 2], nodes[i].param0);
 743                 writeU8(&databuf[start1 + i], nodes[i].param1);
 744                 writeU8(&databuf[start2 + i], nodes[i].param2);
 745         }
 746
 747         /*
 748                 Compress data to output stream
 749         */
 750
 751         if (compressed)
 752                 compressZlib(databuf, databuf_size, os);
 753         else
 754                 os.write((const char*) &databuf[0], databuf_size);
 755
 756         delete [] databuf;
 757 }
 758
 759 // Deserialize bulk node data
 760 void MapNode::deSerializeBulk(std::istream &is, int version,
 761                 MapNode *nodes, u32 nodecount,
 762                 u8 content_width, u8 params_width, bool compressed)
 763 {
 764         if(!ser_ver_supported(version))
 765                 throw VersionMismatchException("ERROR: MapNode format not supported");
 766
 767         if (version < 22
 768                         || (content_width != 1 && content_width != 2)
 769                         || params_width != 2)
 770                 FATAL_ERROR("Deserialize bulk node data error");
 771
 772         // Uncompress or read data
 773         u32 len = nodecount * (content_width + params_width);
 774         SharedBuffer<u8> databuf(len);
 775         if(compressed)
 776         {
 777                 std::ostringstream os(std::ios_base::binary);
 778                 decompressZlib(is, os);
 779                 std::string s = os.str();
 780                 if(s.size() != len)
 781                         throw SerializationError("deSerializeBulkNodes: "
 782                                         "decompress resulted in invalid size");
 783                 memcpy(&databuf[0], s.c_str(), len);
 784         }
 785         else
 786         {
 787                 is.read((char*) &databuf[0], len);
 788                 if(is.eof() || is.fail())
 789                         throw SerializationError("deSerializeBulkNodes: "
 790                                         "failed to read bulk node data");
 791         }
 792
 793         // Deserialize content
 794         if(content_width == 1)
 795         {
 796                 for(u32 i=0; i<nodecount; i++)
 797                         nodes[i].param0 = readU8(&databuf[i]);
 798         }
 799         else if(content_width == 2)
 800         {
 801                 for(u32 i=0; i<nodecount; i++)
 802                         nodes[i].param0 = readU16(&databuf[i*2]);
 803         }
 804
 805         // Deserialize param1
 806         u32 start1 = content_width * nodecount;
 807         for(u32 i=0; i<nodecount; i++)
 808                 nodes[i].param1 = readU8(&databuf[start1 + i]);
 809
 810         // Deserialize param2
 811         u32 start2 = (content_width + 1) * nodecount;
 812         if(content_width == 1)
 813         {
 814                 for(u32 i=0; i<nodecount; i++) {
 815                         nodes[i].param2 = readU8(&databuf[start2 + i]);
 816                         if(nodes[i].param0 > 0x7F){
 817                                 nodes[i].param0 <<= 4;
 818                                 nodes[i].param0 |= (nodes[i].param2&0xF0)>>4;
 819                                 nodes[i].param2 &= 0x0F;
 820                         }
 821                 }
 822         }
 823         else if(content_width == 2)
 824         {
 825                 for(u32 i=0; i<nodecount; i++)
 826                         nodes[i].param2 = readU8(&databuf[start2 + i]);
 827         }
 828 }
 829
 830 /*
 831         Legacy serialization
 832 */
 833 void MapNode::deSerialize_pre22(const u8 *source, u8 version)
 834 {
 835         if(version <= 1)
 836         {
 837                 param0 = source[0];
 838         }
 839         else if(version <= 9)
 840         {
 841                 param0 = source[0];
 842                 param1 = source[1];
 843         }
 844         else
 845         {
 846                 param0 = source[0];
 847                 param1 = source[1];
 848                 param2 = source[2];
 849                 if(param0 > 0x7f){
 850                         param0 <<= 4;
 851                         param0 |= (param2&0xf0)>>4;
 852                         param2 &= 0x0f;
 853                 }
 854         }
 855
 856         // Convert special values from old version to new
 857         if(version <= 19)
 858         {
 859                 // In these versions, CONTENT_IGNORE and CONTENT_AIR
 860                 // are 255 and 254
 861                 // Version 19 is fucked up with sometimes the old values and sometimes not
 862                 if(param0 == 255)
 863                         param0 = CONTENT_IGNORE;
 864                 else if(param0 == 254)
 865                         param0 = CONTENT_AIR;
 866         }
 867
 868         // Translate to our known version
 869         *this = mapnode_translate_to_internal(*this, version);
 870 }