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