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