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 void MapNode::getColor(const ContentFeatures &f, video::SColor *color) const
  48 {
  49         if (f.palette) {
  50                 *color = (*f.palette)[param2];
  51                 return;
  52         }
  53         *color = f.color;
  54 }
  55
  56 void MapNode::setLight(LightBank bank, u8 a_light, const ContentFeatures &f) noexcept
  57 {
  58         // If node doesn't contain light data, ignore this
  59         if(f.param_type != CPT_LIGHT)
  60                 return;
  61         if(bank == LIGHTBANK_DAY)
  62         {
  63                 param1 &= 0xf0;
  64                 param1 |= a_light & 0x0f;
  65         }
  66         else if(bank == LIGHTBANK_NIGHT)
  67         {
  68                 param1 &= 0x0f;
  69                 param1 |= (a_light & 0x0f)<<4;
  70         }
  71         else
  72                 assert("Invalid light bank" == NULL);
  73 }
  74
  75 void MapNode::setLight(LightBank bank, u8 a_light, const NodeDefManager *nodemgr)
  76 {
  77         setLight(bank, a_light, nodemgr->get(*this));
  78 }
  79
  80 bool MapNode::isLightDayNightEq(const NodeDefManager *nodemgr) const
  81 {
  82         const ContentFeatures &f = nodemgr->get(*this);
  83         bool isEqual;
  84
  85         if (f.param_type == CPT_LIGHT) {
  86                 u8 day   = MYMAX(f.light_source, param1 & 0x0f);
  87                 u8 night = MYMAX(f.light_source, (param1 >> 4) & 0x0f);
  88                 isEqual = day == night;
  89         } else {
  90                 isEqual = true;
  91         }
  92
  93         return isEqual;
  94 }
  95
  96 u8 MapNode::getLight(LightBank bank, const NodeDefManager *nodemgr) const
  97 {
  98         // Select the brightest of [light source, propagated light]
  99         const ContentFeatures &f = nodemgr->get(*this);
 100
 101         u8 light;
 102         if(f.param_type == CPT_LIGHT)
 103                 light = bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f;
 104         else
 105                 light = 0;
 106
 107         return MYMAX(f.light_source, light);
 108 }
 109
 110 u8 MapNode::getLightRaw(LightBank bank, const ContentFeatures &f) const noexcept
 111 {
 112         if(f.param_type == CPT_LIGHT)
 113                 return bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f;
 114         return 0;
 115 }
 116
 117 u8 MapNode::getLightNoChecks(LightBank bank, const ContentFeatures *f) const noexcept
 118 {
 119         return MYMAX(f->light_source,
 120                      bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f);
 121 }
 122
 123 bool MapNode::getLightBanks(u8 &lightday, u8 &lightnight,
 124         const NodeDefManager *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(const NodeDefManager *nodemgr,
 146         bool allow_wallmounted) const
 147 {
 148         const ContentFeatures &f = nodemgr->get(*this);
 149         if (f.param_type_2 == CPT2_FACEDIR ||
 150                         f.param_type_2 == CPT2_COLORED_FACEDIR)
 151                 return (getParam2() & 0x1F) % 24;
 152         if (allow_wallmounted && (f.param_type_2 == CPT2_WALLMOUNTED ||
 153                         f.param_type_2 == CPT2_COLORED_WALLMOUNTED))
 154                 return wallmounted_to_facedir[getParam2() & 0x07];
 155         return 0;
 156 }
 157
 158 u8 MapNode::getWallMounted(const NodeDefManager *nodemgr) const
 159 {
 160         const ContentFeatures &f = nodemgr->get(*this);
 161         if (f.param_type_2 == CPT2_WALLMOUNTED ||
 162                         f.param_type_2 == CPT2_COLORED_WALLMOUNTED) {
 163                 return getParam2() & 0x07;
 164         } else if (f.drawtype == NDT_SIGNLIKE || f.drawtype == NDT_TORCHLIKE ||
 165                         f.drawtype == NDT_PLANTLIKE ||
 166                         f.drawtype == NDT_PLANTLIKE_ROOTED) {
 167                 return 1;
 168         }
 169         return 0;
 170 }
 171
 172 v3s16 MapNode::getWallMountedDir(const NodeDefManager *nodemgr) const
 173 {
 174         switch(getWallMounted(nodemgr))
 175         {
 176         case 0: default: return v3s16(0,1,0);
 177         case 1: return v3s16(0,-1,0);
 178         case 2: return v3s16(1,0,0);
 179         case 3: return v3s16(-1,0,0);
 180         case 4: return v3s16(0,0,1);
 181         case 5: return v3s16(0,0,-1);
 182         }
 183 }
 184
 185 u8 MapNode::getDegRotate(const NodeDefManager *nodemgr) const
 186 {
 187         const ContentFeatures &f = nodemgr->get(*this);
 188         if (f.param_type_2 == CPT2_DEGROTATE)
 189                 return getParam2() % 240;
 190         if (f.param_type_2 == CPT2_COLORED_DEGROTATE)
 191                 return 10 * ((getParam2() & 0x1F) % 24);
 192         return 0;
 193 }
 194
 195 void MapNode::rotateAlongYAxis(const NodeDefManager *nodemgr, Rotation rot)
 196 {
 197         ContentParamType2 cpt2 = nodemgr->get(*this).param_type_2;
 198
 199         if (cpt2 == CPT2_FACEDIR || cpt2 == CPT2_COLORED_FACEDIR) {
 200                 static const u8 rotate_facedir[24 * 4] = {
 201                         // Table value = rotated facedir
 202                         // Columns: 0, 90, 180, 270 degrees rotation around vertical axis
 203                         // Rotation is anticlockwise as seen from above (+Y)
 204
 205                         0, 1, 2, 3,  // Initial facedir 0 to 3
 206                         1, 2, 3, 0,
 207                         2, 3, 0, 1,
 208                         3, 0, 1, 2,
 209
 210                         4, 13, 10, 19,  // 4 to 7
 211                         5, 14, 11, 16,
 212                         6, 15, 8, 17,
 213                         7, 12, 9, 18,
 214
 215                         8, 17, 6, 15,  // 8 to 11
 216                         9, 18, 7, 12,
 217                         10, 19, 4, 13,
 218                         11, 16, 5, 14,
 219
 220                         12, 9, 18, 7,  // 12 to 15
 221                         13, 10, 19, 4,
 222                         14, 11, 16, 5,
 223                         15, 8, 17, 6,
 224
 225                         16, 5, 14, 11,  // 16 to 19
 226                         17, 6, 15, 8,
 227                         18, 7, 12, 9,
 228                         19, 4, 13, 10,
 229
 230                         20, 23, 22, 21,  // 20 to 23
 231                         21, 20, 23, 22,
 232                         22, 21, 20, 23,
 233                         23, 22, 21, 20
 234                 };
 235                 u8 facedir = (param2 & 31) % 24;
 236                 u8 index = facedir * 4 + rot;
 237                 param2 &= ~31;
 238                 param2 |= rotate_facedir[index];
 239         } else if (cpt2 == CPT2_WALLMOUNTED ||
 240                         cpt2 == CPT2_COLORED_WALLMOUNTED) {
 241                 u8 wmountface = (param2 & 7);
 242                 if (wmountface <= 1)
 243                         return;
 244
 245                 Rotation oldrot = wallmounted_to_rot[wmountface - 2];
 246                 param2 &= ~7;
 247                 param2 |= rot_to_wallmounted[(oldrot - rot) & 3];
 248         } else if (cpt2 == CPT2_DEGROTATE) {
 249                 int angle = param2; // in 1.5°
 250                 angle += 60 * rot; // don’t do that on u8
 251                 angle %= 240;
 252                 param2 = angle;
 253         } else if (cpt2 == CPT2_COLORED_DEGROTATE) {
 254                 int angle = param2 & 0x1F; // in 15°
 255                 int color = param2 & 0xE0;
 256                 angle += 6 * rot;
 257                 angle %= 24;
 258                 param2 = color | angle;
 259         }
 260 }
 261
 262 void transformNodeBox(const MapNode &n, const NodeBox &nodebox,
 263         const NodeDefManager *nodemgr, std::vector<aabb3f> *p_boxes,
 264         u8 neighbors = 0)
 265 {
 266         std::vector<aabb3f> &boxes = *p_boxes;
 267
 268         if (nodebox.type == NODEBOX_FIXED || nodebox.type == NODEBOX_LEVELED) {
 269                 const std::vector<aabb3f> &fixed = nodebox.fixed;
 270                 int facedir = n.getFaceDir(nodemgr, true);
 271                 u8 axisdir = facedir>>2;
 272                 facedir&=0x03;
 273                 for (aabb3f box : fixed) {
 274                         if (nodebox.type == NODEBOX_LEVELED)
 275                                 box.MaxEdge.Y = (-0.5f + n.getLevel(nodemgr) / 64.0f) * BS;
 276
 277                         switch (axisdir) {
 278                         case 0:
 279                                 if(facedir == 1)
 280                                 {
 281                                         box.MinEdge.rotateXZBy(-90);
 282                                         box.MaxEdge.rotateXZBy(-90);
 283                                 }
 284                                 else if(facedir == 2)
 285                                 {
 286                                         box.MinEdge.rotateXZBy(180);
 287                                         box.MaxEdge.rotateXZBy(180);
 288                                 }
 289                                 else if(facedir == 3)
 290                                 {
 291                                         box.MinEdge.rotateXZBy(90);
 292                                         box.MaxEdge.rotateXZBy(90);
 293                                 }
 294                                 break;
 295                         case 1: // z+
 296                                 box.MinEdge.rotateYZBy(90);
 297                                 box.MaxEdge.rotateYZBy(90);
 298                                 if(facedir == 1)
 299                                 {
 300                                         box.MinEdge.rotateXYBy(90);
 301                                         box.MaxEdge.rotateXYBy(90);
 302                                 }
 303                                 else if(facedir == 2)
 304                                 {
 305                                         box.MinEdge.rotateXYBy(180);
 306                                         box.MaxEdge.rotateXYBy(180);
 307                                 }
 308                                 else if(facedir == 3)
 309                                 {
 310                                         box.MinEdge.rotateXYBy(-90);
 311                                         box.MaxEdge.rotateXYBy(-90);
 312                                 }
 313                                 break;
 314                         case 2: //z-
 315                                 box.MinEdge.rotateYZBy(-90);
 316                                 box.MaxEdge.rotateYZBy(-90);
 317                                 if(facedir == 1)
 318                                 {
 319                                         box.MinEdge.rotateXYBy(-90);
 320                                         box.MaxEdge.rotateXYBy(-90);
 321                                 }
 322                                 else if(facedir == 2)
 323                                 {
 324                                         box.MinEdge.rotateXYBy(180);
 325                                         box.MaxEdge.rotateXYBy(180);
 326                                 }
 327                                 else if(facedir == 3)
 328                                 {
 329                                         box.MinEdge.rotateXYBy(90);
 330                                         box.MaxEdge.rotateXYBy(90);
 331                                 }
 332                                 break;
 333                         case 3:  //x+
 334                                 box.MinEdge.rotateXYBy(-90);
 335                                 box.MaxEdge.rotateXYBy(-90);
 336                                 if(facedir == 1)
 337                                 {
 338                                         box.MinEdge.rotateYZBy(90);
 339                                         box.MaxEdge.rotateYZBy(90);
 340                                 }
 341                                 else if(facedir == 2)
 342                                 {
 343                                         box.MinEdge.rotateYZBy(180);
 344                                         box.MaxEdge.rotateYZBy(180);
 345                                 }
 346                                 else if(facedir == 3)
 347                                 {
 348                                         box.MinEdge.rotateYZBy(-90);
 349                                         box.MaxEdge.rotateYZBy(-90);
 350                                 }
 351                                 break;
 352                         case 4:  //x-
 353                                 box.MinEdge.rotateXYBy(90);
 354                                 box.MaxEdge.rotateXYBy(90);
 355                                 if(facedir == 1)
 356                                 {
 357                                         box.MinEdge.rotateYZBy(-90);
 358                                         box.MaxEdge.rotateYZBy(-90);
 359                                 }
 360                                 else if(facedir == 2)
 361                                 {
 362                                         box.MinEdge.rotateYZBy(180);
 363                                         box.MaxEdge.rotateYZBy(180);
 364                                 }
 365                                 else if(facedir == 3)
 366                                 {
 367                                         box.MinEdge.rotateYZBy(90);
 368                                         box.MaxEdge.rotateYZBy(90);
 369                                 }
 370                                 break;
 371                         case 5:
 372                                 box.MinEdge.rotateXYBy(-180);
 373                                 box.MaxEdge.rotateXYBy(-180);
 374                                 if(facedir == 1)
 375                                 {
 376                                         box.MinEdge.rotateXZBy(90);
 377                                         box.MaxEdge.rotateXZBy(90);
 378                                 }
 379                                 else if(facedir == 2)
 380                                 {
 381                                         box.MinEdge.rotateXZBy(180);
 382                                         box.MaxEdge.rotateXZBy(180);
 383                                 }
 384                                 else if(facedir == 3)
 385                                 {
 386                                         box.MinEdge.rotateXZBy(-90);
 387                                         box.MaxEdge.rotateXZBy(-90);
 388                                 }
 389                                 break;
 390                         default:
 391                                 break;
 392                         }
 393                         box.repair();
 394                         boxes.push_back(box);
 395                 }
 396         }
 397         else if(nodebox.type == NODEBOX_WALLMOUNTED)
 398         {
 399                 v3s16 dir = n.getWallMountedDir(nodemgr);
 400
 401                 // top
 402                 if(dir == v3s16(0,1,0))
 403                 {
 404                         boxes.push_back(nodebox.wall_top);
 405                 }
 406                 // bottom
 407                 else if(dir == v3s16(0,-1,0))
 408                 {
 409                         boxes.push_back(nodebox.wall_bottom);
 410                 }
 411                 // side
 412                 else
 413                 {
 414                         v3f vertices[2] =
 415                         {
 416                                 nodebox.wall_side.MinEdge,
 417                                 nodebox.wall_side.MaxEdge
 418                         };
 419
 420                         for (v3f &vertex : vertices) {
 421                                 if(dir == v3s16(-1,0,0))
 422                                         vertex.rotateXZBy(0);
 423                                 if(dir == v3s16(1,0,0))
 424                                         vertex.rotateXZBy(180);
 425                                 if(dir == v3s16(0,0,-1))
 426                                         vertex.rotateXZBy(90);
 427                                 if(dir == v3s16(0,0,1))
 428                                         vertex.rotateXZBy(-90);
 429                         }
 430
 431                         aabb3f box = aabb3f(vertices[0]);
 432                         box.addInternalPoint(vertices[1]);
 433                         boxes.push_back(box);
 434                 }
 435         }
 436         else if (nodebox.type == NODEBOX_CONNECTED)
 437         {
 438                 size_t boxes_size = boxes.size();
 439                 boxes_size += nodebox.fixed.size();
 440                 if (neighbors & 1)
 441                         boxes_size += nodebox.connect_top.size();
 442                 else
 443                         boxes_size += nodebox.disconnected_top.size();
 444
 445                 if (neighbors & 2)
 446                         boxes_size += nodebox.connect_bottom.size();
 447                 else
 448                         boxes_size += nodebox.disconnected_bottom.size();
 449
 450                 if (neighbors & 4)
 451                         boxes_size += nodebox.connect_front.size();
 452                 else
 453                         boxes_size += nodebox.disconnected_front.size();
 454
 455                 if (neighbors & 8)
 456                         boxes_size += nodebox.connect_left.size();
 457                 else
 458                         boxes_size += nodebox.disconnected_left.size();
 459
 460                 if (neighbors & 16)
 461                         boxes_size += nodebox.connect_back.size();
 462                 else
 463                         boxes_size += nodebox.disconnected_back.size();
 464
 465                 if (neighbors & 32)
 466                         boxes_size += nodebox.connect_right.size();
 467                 else
 468                         boxes_size += nodebox.disconnected_right.size();
 469
 470                 if (neighbors == 0)
 471                         boxes_size += nodebox.disconnected.size();
 472
 473                 if (neighbors < 4)
 474                         boxes_size += nodebox.disconnected_sides.size();
 475
 476                 boxes.reserve(boxes_size);
 477
 478 #define BOXESPUSHBACK(c) \
 479                 for (std::vector<aabb3f>::const_iterator \
 480                                 it = (c).begin(); \
 481                                 it != (c).end(); ++it) \
 482                         (boxes).push_back(*it);
 483
 484                 BOXESPUSHBACK(nodebox.fixed);
 485
 486                 if (neighbors & 1) {
 487                         BOXESPUSHBACK(nodebox.connect_top);
 488                 } else {
 489                         BOXESPUSHBACK(nodebox.disconnected_top);
 490                 }
 491
 492                 if (neighbors & 2) {
 493                         BOXESPUSHBACK(nodebox.connect_bottom);
 494                 } else {
 495                         BOXESPUSHBACK(nodebox.disconnected_bottom);
 496                 }
 497
 498                 if (neighbors & 4) {
 499                         BOXESPUSHBACK(nodebox.connect_front);
 500                 } else {
 501                         BOXESPUSHBACK(nodebox.disconnected_front);
 502                 }
 503
 504                 if (neighbors & 8) {
 505                         BOXESPUSHBACK(nodebox.connect_left);
 506                 } else {
 507                         BOXESPUSHBACK(nodebox.disconnected_left);
 508                 }
 509
 510                 if (neighbors & 16) {
 511                         BOXESPUSHBACK(nodebox.connect_back);
 512                 } else {
 513                         BOXESPUSHBACK(nodebox.disconnected_back);
 514                 }
 515
 516                 if (neighbors & 32) {
 517                         BOXESPUSHBACK(nodebox.connect_right);
 518                 } else {
 519                         BOXESPUSHBACK(nodebox.disconnected_right);
 520                 }
 521
 522                 if (neighbors == 0) {
 523                         BOXESPUSHBACK(nodebox.disconnected);
 524                 }
 525
 526                 if (neighbors < 4) {
 527                         BOXESPUSHBACK(nodebox.disconnected_sides);
 528                 }
 529
 530         }
 531         else // NODEBOX_REGULAR
 532         {
 533                 boxes.emplace_back(-BS/2,-BS/2,-BS/2,BS/2,BS/2,BS/2);
 534         }
 535 }
 536
 537 static inline void getNeighborConnectingFace(
 538         const v3s16 &p, const NodeDefManager *nodedef,
 539         Map *map, MapNode n, u8 bitmask, u8 *neighbors)
 540 {
 541         MapNode n2 = map->getNode(p);
 542         if (nodedef->nodeboxConnects(n, n2, bitmask))
 543                 *neighbors |= bitmask;
 544 }
 545
 546 u8 MapNode::getNeighbors(v3s16 p, Map *map) const
 547 {
 548         const NodeDefManager *nodedef = map->getNodeDefManager();
 549         u8 neighbors = 0;
 550         const ContentFeatures &f = nodedef->get(*this);
 551         // locate possible neighboring nodes to connect to
 552         if (f.drawtype == NDT_NODEBOX && f.node_box.type == NODEBOX_CONNECTED) {
 553                 v3s16 p2 = p;
 554
 555                 p2.Y++;
 556                 getNeighborConnectingFace(p2, nodedef, map, *this, 1, &neighbors);
 557
 558                 p2 = p;
 559                 p2.Y--;
 560                 getNeighborConnectingFace(p2, nodedef, map, *this, 2, &neighbors);
 561
 562                 p2 = p;
 563                 p2.Z--;
 564                 getNeighborConnectingFace(p2, nodedef, map, *this, 4, &neighbors);
 565
 566                 p2 = p;
 567                 p2.X--;
 568                 getNeighborConnectingFace(p2, nodedef, map, *this, 8, &neighbors);
 569
 570                 p2 = p;
 571                 p2.Z++;
 572                 getNeighborConnectingFace(p2, nodedef, map, *this, 16, &neighbors);
 573
 574                 p2 = p;
 575                 p2.X++;
 576                 getNeighborConnectingFace(p2, nodedef, map, *this, 32, &neighbors);
 577         }
 578
 579         return neighbors;
 580 }
 581
 582 void MapNode::getNodeBoxes(const NodeDefManager *nodemgr,
 583         std::vector<aabb3f> *boxes, u8 neighbors) const
 584 {
 585         const ContentFeatures &f = nodemgr->get(*this);
 586         transformNodeBox(*this, f.node_box, nodemgr, boxes, neighbors);
 587 }
 588
 589 void MapNode::getCollisionBoxes(const NodeDefManager *nodemgr,
 590         std::vector<aabb3f> *boxes, u8 neighbors) const
 591 {
 592         const ContentFeatures &f = nodemgr->get(*this);
 593         if (f.collision_box.fixed.empty())
 594                 transformNodeBox(*this, f.node_box, nodemgr, boxes, neighbors);
 595         else
 596                 transformNodeBox(*this, f.collision_box, nodemgr, boxes, neighbors);
 597 }
 598
 599 void MapNode::getSelectionBoxes(const NodeDefManager *nodemgr,
 600         std::vector<aabb3f> *boxes, u8 neighbors) const
 601 {
 602         const ContentFeatures &f = nodemgr->get(*this);
 603         transformNodeBox(*this, f.selection_box, nodemgr, boxes, neighbors);
 604 }
 605
 606 u8 MapNode::getMaxLevel(const NodeDefManager *nodemgr) const
 607 {
 608         const ContentFeatures &f = nodemgr->get(*this);
 609         // todo: after update in all games leave only if (f.param_type_2 ==
 610         if( f.liquid_type == LIQUID_FLOWING || f.param_type_2 == CPT2_FLOWINGLIQUID)
 611                 return LIQUID_LEVEL_MAX;
 612         if(f.leveled || f.param_type_2 == CPT2_LEVELED)
 613                 return f.leveled_max;
 614         return 0;
 615 }
 616
 617 u8 MapNode::getLevel(const NodeDefManager *nodemgr) const
 618 {
 619         const ContentFeatures &f = nodemgr->get(*this);
 620         // todo: after update in all games leave only if (f.param_type_2 ==
 621         if(f.liquid_type == LIQUID_SOURCE)
 622                 return LIQUID_LEVEL_SOURCE;
 623         if (f.param_type_2 == CPT2_FLOWINGLIQUID)
 624                 return getParam2() & LIQUID_LEVEL_MASK;
 625         if(f.liquid_type == LIQUID_FLOWING) // can remove if all param_type_2 setted
 626                 return getParam2() & LIQUID_LEVEL_MASK;
 627         if (f.param_type_2 == CPT2_LEVELED) {
 628                 u8 level = getParam2() & LEVELED_MASK;
 629                 if (level)
 630                         return level;
 631         }
 632         // Return static value from nodedef if param2 isn't used for level
 633         if (f.leveled > f.leveled_max)
 634                 return f.leveled_max;
 635         return f.leveled;
 636 }
 637
 638 s8 MapNode::setLevel(const NodeDefManager *nodemgr, s16 level)
 639 {
 640         s8 rest = 0;
 641         const ContentFeatures &f = nodemgr->get(*this);
 642         if (f.param_type_2 == CPT2_FLOWINGLIQUID
 643                         || f.liquid_type == LIQUID_FLOWING
 644                         || f.liquid_type == LIQUID_SOURCE) {
 645                 if (level <= 0) { // liquid can’t exist with zero level
 646                         setContent(CONTENT_AIR);
 647                         return 0;
 648                 }
 649                 if (level >= LIQUID_LEVEL_SOURCE) {
 650                         rest = level - LIQUID_LEVEL_SOURCE;
 651                         setContent(f.liquid_alternative_source_id);
 652                         setParam2(0);
 653                 } else {
 654                         setContent(f.liquid_alternative_flowing_id);
 655                         setParam2((level & LIQUID_LEVEL_MASK) | (getParam2() & ~LIQUID_LEVEL_MASK));
 656                 }
 657         } else if (f.param_type_2 == CPT2_LEVELED) {
 658                 if (level < 0) { // zero means default for a leveled nodebox
 659                         rest = level;
 660                         level = 0;
 661                 } else if (level > f.leveled_max) {
 662                         rest = level - f.leveled_max;
 663                         level = f.leveled_max;
 664                 }
 665                 setParam2((level & LEVELED_MASK) | (getParam2() & ~LEVELED_MASK));
 666         }
 667         return rest;
 668 }
 669
 670 s8 MapNode::addLevel(const NodeDefManager *nodemgr, s16 add)
 671 {
 672         s16 level = getLevel(nodemgr);
 673         level += add;
 674         return setLevel(nodemgr, level);
 675 }
 676
 677 u32 MapNode::serializedLength(u8 version)
 678 {
 679         if(!ser_ver_supported(version))
 680                 throw VersionMismatchException("ERROR: MapNode format not supported");
 681
 682         if (version == 0)
 683                 return 1;
 684
 685         if (version <= 9)
 686                 return 2;
 687
 688         if (version <= 23)
 689                 return 3;
 690
 691         return 4;
 692 }
 693 void MapNode::serialize(u8 *dest, u8 version) const
 694 {
 695         if(!ser_ver_supported(version))
 696                 throw VersionMismatchException("ERROR: MapNode format not supported");
 697
 698         // Can't do this anymore; we have 16-bit dynamically allocated node IDs
 699         // in memory; conversion just won't work in this direction.
 700         if(version < 24)
 701                 throw SerializationError("MapNode::serialize: serialization to "
 702                                 "version < 24 not possible");
 703
 704         writeU16(dest+0, param0);
 705         writeU8(dest+2, param1);
 706         writeU8(dest+3, param2);
 707 }
 708 void MapNode::deSerialize(u8 *source, u8 version)
 709 {
 710         if(!ser_ver_supported(version))
 711                 throw VersionMismatchException("ERROR: MapNode format not supported");
 712
 713         if(version <= 21)
 714         {
 715                 deSerialize_pre22(source, version);
 716                 return;
 717         }
 718
 719         if(version >= 24){
 720                 param0 = readU16(source+0);
 721                 param1 = readU8(source+2);
 722                 param2 = readU8(source+3);
 723         }else{
 724                 param0 = readU8(source+0);
 725                 param1 = readU8(source+1);
 726                 param2 = readU8(source+2);
 727                 if(param0 > 0x7F){
 728                         param0 |= ((param2&0xF0)<<4);
 729                         param2 &= 0x0F;
 730                 }
 731         }
 732 }
 733 void MapNode::serializeBulk(std::ostream &os, int version,
 734                 const MapNode *nodes, u32 nodecount,
 735                 u8 content_width, u8 params_width, int compression_level)
 736 {
 737         if (!ser_ver_supported(version))
 738                 throw VersionMismatchException("ERROR: MapNode format not supported");
 739
 740         sanity_check(content_width == 2);
 741         sanity_check(params_width == 2);
 742
 743         // Can't do this anymore; we have 16-bit dynamically allocated node IDs
 744         // in memory; conversion just won't work in this direction.
 745         if (version < 24)
 746                 throw SerializationError("MapNode::serializeBulk: serialization to "
 747                                 "version < 24 not possible");
 748
 749         size_t databuf_size = nodecount * (content_width + params_width);
 750         u8 *databuf = new u8[databuf_size];
 751
 752         u32 start1 = content_width * nodecount;
 753         u32 start2 = (content_width + 1) * nodecount;
 754
 755         // Serialize content
 756         for (u32 i = 0; i < nodecount; i++) {
 757                 writeU16(&databuf[i * 2], nodes[i].param0);
 758                 writeU8(&databuf[start1 + i], nodes[i].param1);
 759                 writeU8(&databuf[start2 + i], nodes[i].param2);
 760         }
 761
 762         /*
 763                 Compress data to output stream
 764         */
 765
 766         compressZlib(databuf, databuf_size, os, compression_level);
 767
 768         delete [] databuf;
 769 }
 770
 771 // Deserialize bulk node data
 772 void MapNode::deSerializeBulk(std::istream &is, int version,
 773                 MapNode *nodes, u32 nodecount,
 774                 u8 content_width, u8 params_width)
 775 {
 776         if(!ser_ver_supported(version))
 777                 throw VersionMismatchException("ERROR: MapNode format not supported");
 778
 779         if (version < 22
 780                         || (content_width != 1 && content_width != 2)
 781                         || params_width != 2)
 782                 FATAL_ERROR("Deserialize bulk node data error");
 783
 784         // Uncompress or read data
 785         u32 len = nodecount * (content_width + params_width);
 786         std::ostringstream os(std::ios_base::binary);
 787         decompressZlib(is, os);
 788         std::string s = os.str();
 789         if(s.size() != len)
 790                 throw SerializationError("deSerializeBulkNodes: "
 791                                 "decompress resulted in invalid size");
 792         const u8 *databuf = reinterpret_cast<const u8*>(s.c_str());
 793
 794         // Deserialize content
 795         if(content_width == 1)
 796         {
 797                 for(u32 i=0; i<nodecount; i++)
 798                         nodes[i].param0 = readU8(&databuf[i]);
 799         }
 800         else if(content_width == 2)
 801         {
 802                 for(u32 i=0; i<nodecount; i++)
 803                         nodes[i].param0 = readU16(&databuf[i*2]);
 804         }
 805
 806         // Deserialize param1
 807         u32 start1 = content_width * nodecount;
 808         for(u32 i=0; i<nodecount; i++)
 809                 nodes[i].param1 = readU8(&databuf[start1 + i]);
 810
 811         // Deserialize param2
 812         u32 start2 = (content_width + 1) * nodecount;
 813         if(content_width == 1)
 814         {
 815                 for(u32 i=0; i<nodecount; i++) {
 816                         nodes[i].param2 = readU8(&databuf[start2 + i]);
 817                         if(nodes[i].param0 > 0x7F){
 818                                 nodes[i].param0 <<= 4;
 819                                 nodes[i].param0 |= (nodes[i].param2&0xF0)>>4;
 820                                 nodes[i].param2 &= 0x0F;
 821                         }
 822                 }
 823         }
 824         else if(content_width == 2)
 825         {
 826                 for(u32 i=0; i<nodecount; i++)
 827                         nodes[i].param2 = readU8(&databuf[start2 + i]);
 828         }
 829 }
 830
 831 /*
 832         Legacy serialization
 833 */
 834 void MapNode::deSerialize_pre22(const u8 *source, u8 version)
 835 {
 836         if(version <= 1)
 837         {
 838                 param0 = source[0];
 839         }
 840         else if(version <= 9)
 841         {
 842                 param0 = source[0];
 843                 param1 = source[1];
 844         }
 845         else
 846         {
 847                 param0 = source[0];
 848                 param1 = source[1];
 849                 param2 = source[2];
 850                 if(param0 > 0x7f){
 851                         param0 <<= 4;
 852                         param0 |= (param2&0xf0)>>4;
 853                         param2 &= 0x0f;
 854                 }
 855         }
 856
 857         // Convert special values from old version to new
 858         if(version <= 19)
 859         {
 860                 // In these versions, CONTENT_IGNORE and CONTENT_AIR
 861                 // are 255 and 254
 862                 // Version 19 is messed up with sometimes the old values and sometimes not
 863                 if(param0 == 255)
 864                         param0 = CONTENT_IGNORE;
 865                 else if(param0 == 254)
 866                         param0 = CONTENT_AIR;
 867         }
 868
 869         // Translate to our known version
 870         *this = mapnode_translate_to_internal(*this, version);
 871 }