src/treegen.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>,
   4                           2012-2013 RealBadAngel, Maciej Kasatkin <mk@realbadangel.pl>
   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 "irr_v3d.h"
  21 #include <stack>
  22 #include "util/pointer.h"
  23 #include "util/numeric.h"
  24 #include "map.h"
  25 #include "serverenvironment.h"
  26 #include "nodedef.h"
  27 #include "treegen.h"
  28 #include "voxelalgorithms.h"
  29
  30 namespace treegen
  31 {
  32
  33 void make_tree(MMVManip &vmanip, v3s16 p0,
  34                 bool is_apple_tree, INodeDefManager *ndef, s32 seed)
  35 {
  36         /*
  37                 NOTE: Tree-placing code is currently duplicated in the engine
  38                 and in games that have saplings; both are deprecated but not
  39                 replaced yet
  40         */
  41         MapNode treenode(ndef->getId("mapgen_tree"));
  42         MapNode leavesnode(ndef->getId("mapgen_leaves"));
  43         MapNode applenode(ndef->getId("mapgen_apple"));
  44
  45         PseudoRandom pr(seed);
  46         s16 trunk_h = pr.range(4, 5);
  47         v3s16 p1 = p0;
  48         for (s16 ii = 0; ii < trunk_h; ii++) {
  49                 if (vmanip.m_area.contains(p1)) {
  50                         u32 vi = vmanip.m_area.index(p1);
  51                         vmanip.m_data[vi] = treenode;
  52                 }
  53                 p1.Y++;
  54         }
  55
  56         // p1 is now the last piece of the trunk
  57         p1.Y -= 1;
  58
  59         VoxelArea leaves_a(v3s16(-2, -1, -2), v3s16(2, 2, 2));
  60         Buffer<u8> leaves_d(leaves_a.getVolume());
  61         for (s32 i = 0; i < leaves_a.getVolume(); i++)
  62                 leaves_d[i] = 0;
  63
  64         // Force leaves at near the end of the trunk
  65         s16 d = 1;
  66         for (s16 z = -d; z <= d; z++)
  67         for (s16 y = -d; y <= d; y++)
  68         for (s16 x = -d; x <= d; x++) {
  69                 leaves_d[leaves_a.index(v3s16(x, y, z))] = 1;
  70         }
  71
  72         // Add leaves randomly
  73         for (u32 iii = 0; iii < 7; iii++) {
  74                 v3s16 p(
  75                         pr.range(leaves_a.MinEdge.X, leaves_a.MaxEdge.X - d),
  76                         pr.range(leaves_a.MinEdge.Y, leaves_a.MaxEdge.Y - d),
  77                         pr.range(leaves_a.MinEdge.Z, leaves_a.MaxEdge.Z - d)
  78                 );
  79
  80                 for (s16 z = 0; z <= d; z++)
  81                 for (s16 y = 0; y <= d; y++)
  82                 for (s16 x = 0; x <= d; x++) {
  83                         leaves_d[leaves_a.index(p + v3s16(x, y, z))] = 1;
  84                 }
  85         }
  86
  87         // Blit leaves to vmanip
  88         for (s16 z = leaves_a.MinEdge.Z; z <= leaves_a.MaxEdge.Z; z++)
  89         for (s16 y = leaves_a.MinEdge.Y; y <= leaves_a.MaxEdge.Y; y++) {
  90                 v3s16 pmin(leaves_a.MinEdge.X, y, z);
  91                 u32 i = leaves_a.index(pmin);
  92                 u32 vi = vmanip.m_area.index(pmin + p1);
  93                 for (s16 x = leaves_a.MinEdge.X; x <= leaves_a.MaxEdge.X; x++) {
  94                         v3s16 p(x, y, z);
  95                         if (vmanip.m_area.contains(p + p1) == true &&
  96                                         (vmanip.m_data[vi].getContent() == CONTENT_AIR ||
  97                                         vmanip.m_data[vi].getContent() == CONTENT_IGNORE)) {
  98                                 if (leaves_d[i] == 1) {
  99                                         bool is_apple = pr.range(0, 99) < 10;
 100                                         if (is_apple_tree && is_apple)
 101                                                 vmanip.m_data[vi] = applenode;
 102                                         else
 103                                                 vmanip.m_data[vi] = leavesnode;
 104                                 }
 105                         }
 106                         vi++;
 107                         i++;
 108                 }
 109         }
 110 }
 111
 112
 113 // L-System tree LUA spawner
 114 treegen::error spawn_ltree(ServerEnvironment *env, v3s16 p0,
 115                 INodeDefManager *ndef, const TreeDef &tree_definition)
 116 {
 117         ServerMap *map = &env->getServerMap();
 118         std::map<v3s16, MapBlock*> modified_blocks;
 119         MMVManip vmanip(map);
 120         v3s16 tree_blockp = getNodeBlockPos(p0);
 121         treegen::error e;
 122
 123         vmanip.initialEmerge(tree_blockp - v3s16(1, 1, 1), tree_blockp + v3s16(1, 3, 1));
 124         e = make_ltree(vmanip, p0, ndef, tree_definition);
 125         if (e != SUCCESS)
 126                 return e;
 127
 128         voxalgo::blit_back_with_light(map, &vmanip, &modified_blocks);
 129
 130         // Send a MEET_OTHER event
 131         MapEditEvent event;
 132         event.type = MEET_OTHER;
 133         for (std::map<v3s16, MapBlock*>::iterator
 134                         i = modified_blocks.begin();
 135                         i != modified_blocks.end(); ++i)
 136                 event.modified_blocks.insert(i->first);
 137         map->dispatchEvent(&event);
 138         return SUCCESS;
 139 }
 140
 141
 142 //L-System tree generator
 143 treegen::error make_ltree(MMVManip &vmanip, v3s16 p0,
 144                 INodeDefManager *ndef, TreeDef tree_definition)
 145 {
 146         MapNode dirtnode(ndef->getId("mapgen_dirt"));
 147         s32 seed;
 148         if (tree_definition.explicit_seed)
 149                 seed = tree_definition.seed + 14002;
 150         else
 151                 seed = p0.X * 2 + p0.Y * 4 + p0.Z;  // use the tree position to seed PRNG
 152         PseudoRandom ps(seed);
 153
 154         // chance of inserting abcd rules
 155         double prop_a = 9;
 156         double prop_b = 8;
 157         double prop_c = 7;
 158         double prop_d = 6;
 159
 160         //randomize tree growth level, minimum=2
 161         s16 iterations = tree_definition.iterations;
 162         if (tree_definition.iterations_random_level > 0)
 163                 iterations -= ps.range(0, tree_definition.iterations_random_level);
 164         if (iterations < 2)
 165                 iterations = 2;
 166
 167         s16 MAX_ANGLE_OFFSET = 5;
 168         double angle_in_radians = (double)tree_definition.angle * M_PI / 180;
 169         double angleOffset_in_radians = (s16)(ps.range(0, 1) % MAX_ANGLE_OFFSET) * M_PI / 180;
 170
 171         //initialize rotation matrix, position and stacks for branches
 172         core::matrix4 rotation;
 173         rotation = setRotationAxisRadians(rotation, M_PI / 2, v3f(0, 0, 1));
 174         v3f position;
 175         position.X = p0.X;
 176         position.Y = p0.Y;
 177         position.Z = p0.Z;
 178         std::stack <core::matrix4> stack_orientation;
 179         std::stack <v3f> stack_position;
 180
 181         //generate axiom
 182         std::string axiom = tree_definition.initial_axiom;
 183         for (s16 i = 0; i < iterations; i++) {
 184                 std::string temp = "";
 185                 for (s16 j = 0; j < (s16)axiom.size(); j++) {
 186                         char axiom_char = axiom.at(j);
 187                         switch (axiom_char) {
 188                         case 'A':
 189                                 temp += tree_definition.rules_a;
 190                                 break;
 191                         case 'B':
 192                                 temp += tree_definition.rules_b;
 193                                 break;
 194                         case 'C':
 195                                 temp += tree_definition.rules_c;
 196                                 break;
 197                         case 'D':
 198                                 temp += tree_definition.rules_d;
 199                                 break;
 200                         case 'a':
 201                                 if (prop_a >= ps.range(1, 10))
 202                                         temp += tree_definition.rules_a;
 203                                 break;
 204                         case 'b':
 205                                 if (prop_b >= ps.range(1, 10))
 206                                         temp += tree_definition.rules_b;
 207                                 break;
 208                         case 'c':
 209                                 if (prop_c >= ps.range(1, 10))
 210                                         temp += tree_definition.rules_c;
 211                                 break;
 212                         case 'd':
 213                                 if (prop_d >= ps.range(1, 10))
 214                                         temp += tree_definition.rules_d;
 215                                 break;
 216                         default:
 217                                 temp += axiom_char;
 218                                 break;
 219                         }
 220                 }
 221                 axiom = temp;
 222         }
 223
 224         //make sure tree is not floating in the air
 225         if (tree_definition.trunk_type == "double") {
 226                 tree_node_placement(
 227                         vmanip,
 228                         v3f(position.X + 1, position.Y - 1, position.Z),
 229                         dirtnode
 230                 );
 231                 tree_node_placement(
 232                         vmanip,
 233                         v3f(position.X, position.Y - 1, position.Z + 1),
 234                         dirtnode
 235                 );
 236                 tree_node_placement(
 237                         vmanip,
 238                         v3f(position.X + 1, position.Y - 1, position.Z + 1),
 239                         dirtnode
 240                 );
 241         } else if (tree_definition.trunk_type == "crossed") {
 242                 tree_node_placement(
 243                         vmanip,
 244                         v3f(position.X + 1, position.Y - 1, position.Z),
 245                         dirtnode
 246                 );
 247                 tree_node_placement(
 248                         vmanip,
 249                         v3f(position.X - 1, position.Y - 1, position.Z),
 250                         dirtnode
 251                 );
 252                 tree_node_placement(
 253                         vmanip,
 254                         v3f(position.X, position.Y - 1, position.Z + 1),
 255                         dirtnode
 256                 );
 257                 tree_node_placement(
 258                         vmanip,
 259                         v3f(position.X, position.Y - 1, position.Z - 1),
 260                         dirtnode
 261                 );
 262         }
 263
 264         /* build tree out of generated axiom
 265
 266         Key for Special L-System Symbols used in Axioms
 267
 268     G  - move forward one unit with the pen up
 269     F  - move forward one unit with the pen down drawing trunks and branches
 270     f  - move forward one unit with the pen down drawing leaves (100% chance)
 271     T  - move forward one unit with the pen down drawing trunks only
 272     R  - move forward one unit with the pen down placing fruit
 273     A  - replace with rules set A
 274     B  - replace with rules set B
 275     C  - replace with rules set C
 276     D  - replace with rules set D
 277     a  - replace with rules set A, chance 90%
 278     b  - replace with rules set B, chance 80%
 279     c  - replace with rules set C, chance 70%
 280     d  - replace with rules set D, chance 60%
 281     +  - yaw the turtle right by angle degrees
 282     -  - yaw the turtle left by angle degrees
 283     &  - pitch the turtle down by angle degrees
 284     ^  - pitch the turtle up by angle degrees
 285     /  - roll the turtle to the right by angle degrees
 286     *  - roll the turtle to the left by angle degrees
 287     [  - save in stack current state info
 288     ]  - recover from stack state info
 289
 290     */
 291
 292         s16 x,y,z;
 293         for (s16 i = 0; i < (s16)axiom.size(); i++) {
 294                 char axiom_char = axiom.at(i);
 295                 core::matrix4 temp_rotation;
 296                 temp_rotation.makeIdentity();
 297                 v3f dir;
 298                 switch (axiom_char) {
 299                 case 'G':
 300                         dir = v3f(1, 0, 0);
 301                         dir = transposeMatrix(rotation, dir);
 302                         position += dir;
 303                         break;
 304                 case 'T':
 305                         tree_trunk_placement(
 306                                 vmanip,
 307                                 v3f(position.X, position.Y, position.Z),
 308                                 tree_definition
 309                         );
 310                         if (tree_definition.trunk_type == "double" &&
 311                                         !tree_definition.thin_branches) {
 312                                 tree_trunk_placement(
 313                                         vmanip,
 314                                         v3f(position.X + 1, position.Y, position.Z),
 315                                         tree_definition
 316                                 );
 317                                 tree_trunk_placement(
 318                                         vmanip,
 319                                         v3f(position.X, position.Y, position.Z + 1),
 320                                         tree_definition
 321                                 );
 322                                 tree_trunk_placement(
 323                                         vmanip,
 324                                         v3f(position.X + 1, position.Y, position.Z + 1),
 325                                         tree_definition
 326                                 );
 327                         } else if (tree_definition.trunk_type == "crossed" &&
 328                                         !tree_definition.thin_branches) {
 329                                 tree_trunk_placement(
 330                                         vmanip,
 331                                         v3f(position.X + 1, position.Y, position.Z),
 332                                         tree_definition
 333                                 );
 334                                 tree_trunk_placement(
 335                                         vmanip,
 336                                         v3f(position.X - 1, position.Y, position.Z),
 337                                         tree_definition
 338                                 );
 339                                 tree_trunk_placement(
 340                                         vmanip,
 341                                         v3f(position.X, position.Y, position.Z + 1),
 342                                         tree_definition
 343                                 );
 344                                 tree_trunk_placement(
 345                                         vmanip,
 346                                         v3f(position.X, position.Y, position.Z - 1),
 347                                         tree_definition
 348                                 );
 349                         }
 350                         dir = v3f(1, 0, 0);
 351                         dir = transposeMatrix(rotation, dir);
 352                         position += dir;
 353                         break;
 354                 case 'F':
 355                         tree_trunk_placement(
 356                                 vmanip,
 357                                 v3f(position.X, position.Y, position.Z),
 358                                 tree_definition
 359                         );
 360                         if ((stack_orientation.empty() &&
 361                                         tree_definition.trunk_type == "double") ||
 362                                         (!stack_orientation.empty() &&
 363                                         tree_definition.trunk_type == "double" &&
 364                                         !tree_definition.thin_branches)) {
 365                                 tree_trunk_placement(
 366                                         vmanip,
 367                                         v3f(position.X +1 , position.Y, position.Z),
 368                                         tree_definition
 369                                 );
 370                                 tree_trunk_placement(
 371                                         vmanip,
 372                                         v3f(position.X, position.Y, position.Z + 1),
 373                                         tree_definition
 374                                 );
 375                                 tree_trunk_placement(
 376                                         vmanip,
 377                                         v3f(position.X + 1, position.Y, position.Z + 1),
 378                                         tree_definition
 379                                 );
 380                         } else if ((stack_orientation.empty() &&
 381                                         tree_definition.trunk_type == "crossed") ||
 382                                         (!stack_orientation.empty() &&
 383                                         tree_definition.trunk_type == "crossed" &&
 384                                         !tree_definition.thin_branches)) {
 385                                 tree_trunk_placement(
 386                                         vmanip,
 387                                         v3f(position.X + 1, position.Y, position.Z),
 388                                         tree_definition
 389                                 );
 390                                 tree_trunk_placement(
 391                                         vmanip,
 392                                         v3f(position.X - 1, position.Y, position.Z),
 393                                         tree_definition
 394                                 );
 395                                 tree_trunk_placement(
 396                                         vmanip,
 397                                         v3f(position.X, position.Y, position.Z + 1),
 398                                         tree_definition
 399                                 );
 400                                 tree_trunk_placement(
 401                                         vmanip,
 402                                         v3f(position.X, position.Y, position.Z - 1),
 403                                         tree_definition
 404                                 );
 405                         } if (stack_orientation.empty() == false) {
 406                                 s16 size = 1;
 407                                 for (x = -size; x <= size; x++)
 408                                 for (y = -size; y <= size; y++)
 409                                 for (z = -size; z <= size; z++) {
 410                                         if (abs(x) == size &&
 411                                                         abs(y) == size &&
 412                                                         abs(z) == size) {
 413                                                 tree_leaves_placement(
 414                                                         vmanip,
 415                                                         v3f(position.X + x + 1, position.Y + y,
 416                                                                         position.Z + z),
 417                                                         ps.next(),
 418                                                         tree_definition
 419                                                 );
 420                                                 tree_leaves_placement(
 421                                                         vmanip,
 422                                                         v3f(position.X + x - 1, position.Y + y,
 423                                                                         position.Z + z),
 424                                                         ps.next(),
 425                                                         tree_definition
 426                                                 );
 427                                                 tree_leaves_placement(
 428                                                         vmanip,v3f(position.X + x, position.Y + y,
 429                                                                         position.Z + z + 1),
 430                                                         ps.next(),
 431                                                         tree_definition
 432                                                 );
 433                                                 tree_leaves_placement(
 434                                                         vmanip,v3f(position.X + x, position.Y + y,
 435                                                                         position.Z + z - 1),
 436                                                         ps.next(),
 437                                                         tree_definition
 438                                                 );
 439                                         }
 440                                 }
 441                         }
 442                         dir = v3f(1, 0, 0);
 443                         dir = transposeMatrix(rotation, dir);
 444                         position += dir;
 445                         break;
 446                 case 'f':
 447                         tree_single_leaves_placement(
 448                                 vmanip,
 449                                 v3f(position.X, position.Y, position.Z),
 450                                 ps.next(),
 451                                 tree_definition
 452                         );
 453                         dir = v3f(1, 0, 0);
 454                         dir = transposeMatrix(rotation, dir);
 455                         position += dir;
 456                         break;
 457                 case 'R':
 458                         tree_fruit_placement(
 459                                 vmanip,
 460                                 v3f(position.X, position.Y, position.Z),
 461                                 tree_definition
 462                         );
 463                         dir = v3f(1, 0, 0);
 464                         dir = transposeMatrix(rotation, dir);
 465                         position += dir;
 466                         break;
 467
 468                 // turtle orientation commands
 469                 case '[':
 470                         stack_orientation.push(rotation);
 471                         stack_position.push(position);
 472                         break;
 473                 case ']':
 474                         if (stack_orientation.empty())
 475                                 return UNBALANCED_BRACKETS;
 476                         rotation = stack_orientation.top();
 477                         stack_orientation.pop();
 478                         position = stack_position.top();
 479                         stack_position.pop();
 480                         break;
 481                 case '+':
 482                         temp_rotation.makeIdentity();
 483                         temp_rotation = setRotationAxisRadians(temp_rotation,
 484                                         angle_in_radians + angleOffset_in_radians, v3f(0, 0, 1));
 485                         rotation *= temp_rotation;
 486                         break;
 487                 case '-':
 488                         temp_rotation.makeIdentity();
 489                         temp_rotation = setRotationAxisRadians(temp_rotation,
 490                                         angle_in_radians + angleOffset_in_radians, v3f(0, 0, -1));
 491                         rotation *= temp_rotation;
 492                         break;
 493                 case '&':
 494                         temp_rotation.makeIdentity();
 495                         temp_rotation = setRotationAxisRadians(temp_rotation,
 496                                         angle_in_radians + angleOffset_in_radians, v3f(0, 1, 0));
 497                         rotation *= temp_rotation;
 498                         break;
 499                 case '^':
 500                         temp_rotation.makeIdentity();
 501                         temp_rotation = setRotationAxisRadians(temp_rotation,
 502                                         angle_in_radians + angleOffset_in_radians, v3f(0, -1, 0));
 503                         rotation *= temp_rotation;
 504                         break;
 505                 case '*':
 506                         temp_rotation.makeIdentity();
 507                         temp_rotation = setRotationAxisRadians(temp_rotation,
 508                                         angle_in_radians, v3f(1, 0, 0));
 509                         rotation *= temp_rotation;
 510                         break;
 511                 case '/':
 512                         temp_rotation.makeIdentity();
 513                         temp_rotation = setRotationAxisRadians(temp_rotation,
 514                                         angle_in_radians, v3f(-1, 0, 0));
 515                         rotation *= temp_rotation;
 516                         break;
 517                 default:
 518                         break;
 519                 }
 520         }
 521
 522         return SUCCESS;
 523 }
 524
 525
 526 void tree_node_placement(MMVManip &vmanip, v3f p0, MapNode node)
 527 {
 528         v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
 529         if (vmanip.m_area.contains(p1) == false)
 530                 return;
 531         u32 vi = vmanip.m_area.index(p1);
 532         if (vmanip.m_data[vi].getContent() != CONTENT_AIR
 533                         && vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
 534                 return;
 535         vmanip.m_data[vmanip.m_area.index(p1)] = node;
 536 }
 537
 538
 539 void tree_trunk_placement(MMVManip &vmanip, v3f p0, TreeDef &tree_definition)
 540 {
 541         v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
 542         if (vmanip.m_area.contains(p1) == false)
 543                 return;
 544         u32 vi = vmanip.m_area.index(p1);
 545         if (vmanip.m_data[vi].getContent() != CONTENT_AIR
 546                         && vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
 547                 return;
 548         vmanip.m_data[vmanip.m_area.index(p1)] = tree_definition.trunknode;
 549 }
 550
 551
 552 void tree_leaves_placement(MMVManip &vmanip, v3f p0,
 553                 PseudoRandom ps, TreeDef &tree_definition)
 554 {
 555         MapNode leavesnode = tree_definition.leavesnode;
 556         if (ps.range(1, 100) > 100 - tree_definition.leaves2_chance)
 557                 leavesnode = tree_definition.leaves2node;
 558         v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
 559         if (vmanip.m_area.contains(p1) == false)
 560                 return;
 561         u32 vi = vmanip.m_area.index(p1);
 562         if (vmanip.m_data[vi].getContent() != CONTENT_AIR
 563                         && vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
 564                 return;
 565         if (tree_definition.fruit_chance > 0) {
 566                 if (ps.range(1, 100) > 100 - tree_definition.fruit_chance)
 567                         vmanip.m_data[vmanip.m_area.index(p1)] = tree_definition.fruitnode;
 568                 else
 569                         vmanip.m_data[vmanip.m_area.index(p1)] = leavesnode;
 570         } else if (ps.range(1, 100) > 20) {
 571                 vmanip.m_data[vmanip.m_area.index(p1)] = leavesnode;
 572         }
 573 }
 574
 575
 576 void tree_single_leaves_placement(MMVManip &vmanip, v3f p0,
 577                 PseudoRandom ps, TreeDef &tree_definition)
 578 {
 579         MapNode leavesnode = tree_definition.leavesnode;
 580         if (ps.range(1, 100) > 100 - tree_definition.leaves2_chance)
 581                 leavesnode = tree_definition.leaves2node;
 582         v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
 583         if (vmanip.m_area.contains(p1) == false)
 584                 return;
 585         u32 vi = vmanip.m_area.index(p1);
 586         if (vmanip.m_data[vi].getContent() != CONTENT_AIR
 587                         && vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
 588                 return;
 589         vmanip.m_data[vmanip.m_area.index(p1)] = leavesnode;
 590 }
 591
 592
 593 void tree_fruit_placement(MMVManip &vmanip, v3f p0, TreeDef &tree_definition)
 594 {
 595         v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
 596         if (vmanip.m_area.contains(p1) == false)
 597                 return;
 598         u32 vi = vmanip.m_area.index(p1);
 599         if (vmanip.m_data[vi].getContent() != CONTENT_AIR
 600                         && vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
 601                 return;
 602         vmanip.m_data[vmanip.m_area.index(p1)] = tree_definition.fruitnode;
 603 }
 604
 605
 606 irr::core::matrix4 setRotationAxisRadians(irr::core::matrix4 M, double angle, v3f axis)
 607 {
 608         double c = cos(angle);
 609         double s = sin(angle);
 610         double t = 1.0 - c;
 611
 612         double tx  = t * axis.X;
 613         double ty  = t * axis.Y;
 614         double tz  = t * axis.Z;
 615         double sx  = s * axis.X;
 616         double sy  = s * axis.Y;
 617         double sz  = s * axis.Z;
 618
 619         M[0] = tx * axis.X + c;
 620         M[1] = tx * axis.Y + sz;
 621         M[2] = tx * axis.Z - sy;
 622
 623         M[4] = ty * axis.X - sz;
 624         M[5] = ty * axis.Y + c;
 625         M[6] = ty * axis.Z + sx;
 626
 627         M[8]  = tz * axis.X + sy;
 628         M[9]  = tz * axis.Y - sx;
 629         M[10] = tz * axis.Z + c;
 630         return M;
 631 }
 632
 633
 634 v3f transposeMatrix(irr::core::matrix4 M, v3f v)
 635 {
 636         v3f translated;
 637         double x = M[0] * v.X + M[4] * v.Y + M[8]  * v.Z +M[12];
 638         double y = M[1] * v.X + M[5] * v.Y + M[9]  * v.Z +M[13];
 639         double z = M[2] * v.X + M[6] * v.Y + M[10] * v.Z +M[14];
 640         translated.X = x;
 641         translated.Y = y;
 642         translated.Z = z;
 643         return translated;
 644 }
 645
 646
 647 void make_jungletree(MMVManip &vmanip, v3s16 p0, INodeDefManager *ndef, s32 seed)
 648 {
 649         /*
 650                 NOTE: Tree-placing code is currently duplicated in the engine
 651                 and in games that have saplings; both are deprecated but not
 652                 replaced yet
 653         */
 654         content_t c_tree   = ndef->getId("mapgen_jungletree");
 655         content_t c_leaves = ndef->getId("mapgen_jungleleaves");
 656         if (c_tree == CONTENT_IGNORE)
 657                 c_tree = ndef->getId("mapgen_tree");
 658         if (c_leaves == CONTENT_IGNORE)
 659                 c_leaves = ndef->getId("mapgen_leaves");
 660
 661         MapNode treenode(c_tree);
 662         MapNode leavesnode(c_leaves);
 663
 664         PseudoRandom pr(seed);
 665         for (s16 x= -1; x <= 1; x++)
 666         for (s16 z= -1; z <= 1; z++) {
 667                 if (pr.range(0, 2) == 0)
 668                         continue;
 669                 v3s16 p1 = p0 + v3s16(x, 0, z);
 670                 v3s16 p2 = p0 + v3s16(x, -1, z);
 671                 u32 vi1 = vmanip.m_area.index(p1);
 672                 u32 vi2 = vmanip.m_area.index(p2);
 673
 674                 if (vmanip.m_area.contains(p2) &&
 675                                 vmanip.m_data[vi2].getContent() == CONTENT_AIR)
 676                         vmanip.m_data[vi2] = treenode;
 677                 else if (vmanip.m_area.contains(p1) &&
 678                                 vmanip.m_data[vi1].getContent() == CONTENT_AIR)
 679                         vmanip.m_data[vi1] = treenode;
 680         }
 681         vmanip.m_data[vmanip.m_area.index(p0)] = treenode;
 682
 683         s16 trunk_h = pr.range(8, 12);
 684         v3s16 p1 = p0;
 685         for (s16 ii = 0; ii < trunk_h; ii++) {
 686                 if (vmanip.m_area.contains(p1)) {
 687                         u32 vi = vmanip.m_area.index(p1);
 688                         vmanip.m_data[vi] = treenode;
 689                 }
 690                 p1.Y++;
 691         }
 692
 693         // p1 is now the last piece of the trunk
 694         p1.Y -= 1;
 695
 696         VoxelArea leaves_a(v3s16(-3, -2, -3), v3s16(3, 2, 3));
 697         //SharedPtr<u8> leaves_d(new u8[leaves_a.getVolume()]);
 698         Buffer<u8> leaves_d(leaves_a.getVolume());
 699         for (s32 i = 0; i < leaves_a.getVolume(); i++)
 700                 leaves_d[i] = 0;
 701
 702         // Force leaves at near the end of the trunk
 703         s16 d = 1;
 704         for (s16 z = -d; z <= d; z++)
 705         for (s16 y = -d; y <= d; y++)
 706         for (s16 x = -d; x <= d; x++) {
 707                 leaves_d[leaves_a.index(v3s16(x,y,z))] = 1;
 708         }
 709
 710         // Add leaves randomly
 711         for (u32 iii = 0; iii < 30; iii++) {
 712                 v3s16 p(
 713                         pr.range(leaves_a.MinEdge.X, leaves_a.MaxEdge.X - d),
 714                         pr.range(leaves_a.MinEdge.Y, leaves_a.MaxEdge.Y - d),
 715                         pr.range(leaves_a.MinEdge.Z, leaves_a.MaxEdge.Z - d)
 716                 );
 717
 718                 for (s16 z = 0; z <= d; z++)
 719                 for (s16 y = 0; y <= d; y++)
 720                 for (s16 x = 0; x <= d; x++) {
 721                         leaves_d[leaves_a.index(p + v3s16(x, y, z))] = 1;
 722                 }
 723         }
 724
 725         // Blit leaves to vmanip
 726         for (s16 z = leaves_a.MinEdge.Z; z <= leaves_a.MaxEdge.Z; z++)
 727         for (s16 y = leaves_a.MinEdge.Y; y <= leaves_a.MaxEdge.Y; y++) {
 728                 v3s16 pmin(leaves_a.MinEdge.X, y, z);
 729                 u32 i = leaves_a.index(pmin);
 730                 u32 vi = vmanip.m_area.index(pmin + p1);
 731                 for (s16 x = leaves_a.MinEdge.X; x <= leaves_a.MaxEdge.X; x++) {
 732                         v3s16 p(x, y, z);
 733                         if (vmanip.m_area.contains(p + p1) == true &&
 734                                         (vmanip.m_data[vi].getContent() == CONTENT_AIR ||
 735                                         vmanip.m_data[vi].getContent() == CONTENT_IGNORE)) {
 736                                 if (leaves_d[i] == 1)
 737                                         vmanip.m_data[vi] = leavesnode;
 738                         }
 739                         vi++;
 740                         i++;
 741                 }
 742         }
 743 }
 744
 745
 746 void make_pine_tree(MMVManip &vmanip, v3s16 p0, INodeDefManager *ndef, s32 seed)
 747 {
 748         /*
 749                 NOTE: Tree-placing code is currently duplicated in the engine
 750                 and in games that have saplings; both are deprecated but not
 751                 replaced yet
 752         */
 753         content_t c_tree   = ndef->getId("mapgen_pine_tree");
 754         content_t c_leaves = ndef->getId("mapgen_pine_needles");
 755         content_t c_snow = ndef->getId("mapgen_snow");
 756         if (c_tree == CONTENT_IGNORE)
 757                 c_tree = ndef->getId("mapgen_tree");
 758         if (c_leaves == CONTENT_IGNORE)
 759                 c_leaves = ndef->getId("mapgen_leaves");
 760         if (c_snow == CONTENT_IGNORE)
 761                 c_snow = CONTENT_AIR;
 762
 763         MapNode treenode(c_tree);
 764         MapNode leavesnode(c_leaves);
 765         MapNode snownode(c_snow);
 766
 767         PseudoRandom pr(seed);
 768         u16 trunk_h = pr.range(9, 13);
 769         v3s16 p1 = p0;
 770         for (u16 ii = 0; ii < trunk_h; ii++) {
 771                 if (vmanip.m_area.contains(p1)) {
 772                         u32 vi = vmanip.m_area.index(p1);
 773                         vmanip.m_data[vi] = treenode;
 774                 }
 775                 p1.Y++;
 776         }
 777
 778         // Make p1 the top node of the trunk
 779         p1.Y -= 1;
 780
 781         VoxelArea leaves_a(v3s16(-3, -6, -3), v3s16(3, 3, 3));
 782         Buffer<u8> leaves_d(leaves_a.getVolume());
 783         for (s32 i = 0; i < leaves_a.getVolume(); i++)
 784                 leaves_d[i] = 0;
 785
 786         // Upper branches
 787         u16 dev = 3;
 788         for (s16 yy = -1; yy <= 1; yy++) {
 789                 for (s16 zz = -dev; zz <= dev; zz++) {
 790                         u32 i = leaves_a.index(v3s16(-dev, yy, zz));
 791                         u32 ia = leaves_a.index(v3s16(-dev, yy+1, zz));
 792                         for (s16 xx = -dev; xx <= dev; xx++) {
 793                                 if (pr.range(0, 20) <= 19 - dev) {
 794                                         leaves_d[i] = 1;
 795                                         leaves_d[ia] = 2;
 796                                 }
 797                                 i++;
 798                                 ia++;
 799                         }
 800                 }
 801                 dev--;
 802         }
 803
 804         // Centre top nodes
 805         leaves_d[leaves_a.index(v3s16(0, 1, 0))] = 1;
 806         leaves_d[leaves_a.index(v3s16(0, 2, 0))] = 1;
 807         leaves_d[leaves_a.index(v3s16(0, 3, 0))] = 2;
 808
 809         // Lower branches
 810         s16 my = -6;
 811         for (u32 iii = 0; iii < 20; iii++) {
 812                 s16 xi = pr.range(-3, 2);
 813                 s16 yy = pr.range(-6, -5);
 814                 s16 zi = pr.range(-3, 2);
 815                 if (yy > my)
 816                         my = yy;
 817                 for (s16 zz = zi; zz <= zi + 1; zz++) {
 818                         u32 i = leaves_a.index(v3s16(xi, yy, zz));
 819                         u32 ia = leaves_a.index(v3s16(xi, yy + 1, zz));
 820                         for (s32 xx = xi; xx <= xi + 1; xx++) {
 821                                 leaves_d[i] = 1;
 822                                 if (leaves_d[ia] == 0)
 823                                         leaves_d[ia] = 2;
 824                                 i++;
 825                                 ia++;
 826                         }
 827                 }
 828         }
 829
 830         dev = 2;
 831         for (s16 yy = my + 1; yy <= my + 2; yy++) {
 832                 for (s16 zz = -dev; zz <= dev; zz++) {
 833                         u32 i = leaves_a.index(v3s16(-dev, yy, zz));
 834                         u32 ia = leaves_a.index(v3s16(-dev, yy + 1, zz));
 835                         for (s16 xx = -dev; xx <= dev; xx++) {
 836                                 if (pr.range(0, 20) <= 19 - dev) {
 837                                         leaves_d[i] = 1;
 838                                         leaves_d[ia] = 2;
 839                                 }
 840                                 i++;
 841                                 ia++;
 842                         }
 843                 }
 844                 dev--;
 845         }
 846
 847         // Blit leaves to vmanip
 848         for (s16 z = leaves_a.MinEdge.Z; z <= leaves_a.MaxEdge.Z; z++)
 849         for (s16 y = leaves_a.MinEdge.Y; y <= leaves_a.MaxEdge.Y; y++) {
 850                 v3s16 pmin(leaves_a.MinEdge.X, y, z);
 851                 u32 i = leaves_a.index(pmin);
 852                 u32 vi = vmanip.m_area.index(pmin + p1);
 853                 for (s16 x = leaves_a.MinEdge.X; x <= leaves_a.MaxEdge.X; x++) {
 854                         v3s16 p(x, y, z);
 855                         if (vmanip.m_area.contains(p + p1) == true &&
 856                                         (vmanip.m_data[vi].getContent() == CONTENT_AIR ||
 857                                         vmanip.m_data[vi].getContent() == CONTENT_IGNORE ||
 858                                         vmanip.m_data[vi] == snownode)) {
 859                                 if (leaves_d[i] == 1)
 860                                         vmanip.m_data[vi] = leavesnode;
 861                                 else if (leaves_d[i] == 2)
 862                                         vmanip.m_data[vi] = snownode;
 863                         }
 864                         vi++;
 865                         i++;
 866                 }
 867         }
 868 }
 869
 870 }; // namespace treegen