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 "mapblock.h"
  26 #include "serverenvironment.h"
  27 #include "nodedef.h"
  28 #include "treegen.h"
  29 #include "voxelalgorithms.h"
  30
  31 namespace treegen
  32 {
  33
  34 void make_tree(MMVManip &vmanip, v3s16 p0,
  35                 bool is_apple_tree, INodeDefManager *ndef, s32 seed)
  36 {
  37         /*
  38                 NOTE: Tree-placing code is currently duplicated in the engine
  39                 and in games that have saplings; both are deprecated but not
  40                 replaced yet
  41         */
  42         MapNode treenode(ndef->getId("mapgen_tree"));
  43         MapNode leavesnode(ndef->getId("mapgen_leaves"));
  44         MapNode applenode(ndef->getId("mapgen_apple"));
  45
  46         PseudoRandom pr(seed);
  47         s16 trunk_h = pr.range(4, 5);
  48         v3s16 p1 = p0;
  49         for (s16 ii = 0; ii < trunk_h; ii++) {
  50                 if (vmanip.m_area.contains(p1)) {
  51                         u32 vi = vmanip.m_area.index(p1);
  52                         vmanip.m_data[vi] = treenode;
  53                 }
  54                 p1.Y++;
  55         }
  56
  57         // p1 is now the last piece of the trunk
  58         p1.Y -= 1;
  59
  60         VoxelArea leaves_a(v3s16(-2, -1, -2), v3s16(2, 2, 2));
  61         Buffer<u8> leaves_d(leaves_a.getVolume());
  62         for (s32 i = 0; i < leaves_a.getVolume(); i++)
  63                 leaves_d[i] = 0;
  64
  65         // Force leaves at near the end of the trunk
  66         s16 d = 1;
  67         for (s16 z = -d; z <= d; z++)
  68         for (s16 y = -d; y <= d; y++)
  69         for (s16 x = -d; x <= d; x++) {
  70                 leaves_d[leaves_a.index(v3s16(x, y, z))] = 1;
  71         }
  72
  73         // Add leaves randomly
  74         for (u32 iii = 0; iii < 7; iii++) {
  75                 v3s16 p(
  76                         pr.range(leaves_a.MinEdge.X, leaves_a.MaxEdge.X - d),
  77                         pr.range(leaves_a.MinEdge.Y, leaves_a.MaxEdge.Y - d),
  78                         pr.range(leaves_a.MinEdge.Z, leaves_a.MaxEdge.Z - d)
  79                 );
  80
  81                 for (s16 z = 0; z <= d; z++)
  82                 for (s16 y = 0; y <= d; y++)
  83                 for (s16 x = 0; x <= d; x++) {
  84                         leaves_d[leaves_a.index(p + v3s16(x, y, z))] = 1;
  85                 }
  86         }
  87
  88         // Blit leaves to vmanip
  89         for (s16 z = leaves_a.MinEdge.Z; z <= leaves_a.MaxEdge.Z; z++)
  90         for (s16 y = leaves_a.MinEdge.Y; y <= leaves_a.MaxEdge.Y; y++) {
  91                 v3s16 pmin(leaves_a.MinEdge.X, y, z);
  92                 u32 i = leaves_a.index(pmin);
  93                 u32 vi = vmanip.m_area.index(pmin + p1);
  94                 for (s16 x = leaves_a.MinEdge.X; x <= leaves_a.MaxEdge.X; x++) {
  95                         v3s16 p(x, y, z);
  96                         if (vmanip.m_area.contains(p + p1) == true &&
  97                                         (vmanip.m_data[vi].getContent() == CONTENT_AIR ||
  98                                         vmanip.m_data[vi].getContent() == CONTENT_IGNORE)) {
  99                                 if (leaves_d[i] == 1) {
 100                                         bool is_apple = pr.range(0, 99) < 10;
 101                                         if (is_apple_tree && is_apple)
 102                                                 vmanip.m_data[vi] = applenode;
 103                                         else
 104                                                 vmanip.m_data[vi] = leavesnode;
 105                                 }
 106                         }
 107                         vi++;
 108                         i++;
 109                 }
 110         }
 111 }
 112
 113
 114 // L-System tree LUA spawner
 115 treegen::error spawn_ltree(ServerEnvironment *env, v3s16 p0,
 116                 INodeDefManager *ndef, const TreeDef &tree_definition)
 117 {
 118         ServerMap *map = &env->getServerMap();
 119         std::map<v3s16, MapBlock*> modified_blocks;
 120         MMVManip vmanip(map);
 121         v3s16 tree_blockp = getNodeBlockPos(p0);
 122         treegen::error e;
 123
 124         vmanip.initialEmerge(tree_blockp - v3s16(1, 1, 1), tree_blockp + v3s16(1, 3, 1));
 125         e = make_ltree(vmanip, p0, ndef, tree_definition);
 126         if (e != SUCCESS)
 127                 return e;
 128
 129         voxalgo::blit_back_with_light(map, &vmanip, &modified_blocks);
 130
 131         // Send a MEET_OTHER event
 132         MapEditEvent event;
 133         event.type = MEET_OTHER;
 134         for (std::map<v3s16, MapBlock*>::iterator
 135                         i = modified_blocks.begin();
 136                         i != modified_blocks.end(); ++i)
 137                 event.modified_blocks.insert(i->first);
 138         map->dispatchEvent(&event);
 139         return SUCCESS;
 140 }
 141
 142
 143 //L-System tree generator
 144 treegen::error make_ltree(MMVManip &vmanip, v3s16 p0,
 145                 INodeDefManager *ndef, TreeDef tree_definition)
 146 {
 147         MapNode dirtnode(ndef->getId("mapgen_dirt"));
 148         s32 seed;
 149         if (tree_definition.explicit_seed)
 150                 seed = tree_definition.seed + 14002;
 151         else
 152                 seed = p0.X * 2 + p0.Y * 4 + p0.Z;  // use the tree position to seed PRNG
 153         PseudoRandom ps(seed);
 154
 155         // chance of inserting abcd rules
 156         double prop_a = 9;
 157         double prop_b = 8;
 158         double prop_c = 7;
 159         double prop_d = 6;
 160
 161         //randomize tree growth level, minimum=2
 162         s16 iterations = tree_definition.iterations;
 163         if (tree_definition.iterations_random_level > 0)
 164                 iterations -= ps.range(0, tree_definition.iterations_random_level);
 165         if (iterations < 2)
 166                 iterations = 2;
 167
 168         s16 MAX_ANGLE_OFFSET = 5;
 169         double angle_in_radians = (double)tree_definition.angle * M_PI / 180;
 170         double angleOffset_in_radians = (s16)(ps.range(0, 1) % MAX_ANGLE_OFFSET) * M_PI / 180;
 171
 172         //initialize rotation matrix, position and stacks for branches
 173         core::matrix4 rotation;
 174         rotation = setRotationAxisRadians(rotation, M_PI / 2, v3f(0, 0, 1));
 175         v3f position;
 176         position.X = p0.X;
 177         position.Y = p0.Y;
 178         position.Z = p0.Z;
 179         std::stack <core::matrix4> stack_orientation;
 180         std::stack <v3f> stack_position;
 181
 182         //generate axiom
 183         std::string axiom = tree_definition.initial_axiom;
 184         for (s16 i = 0; i < iterations; i++) {
 185                 std::string temp = "";
 186                 for (s16 j = 0; j < (s16)axiom.size(); j++) {
 187                         char axiom_char = axiom.at(j);
 188                         switch (axiom_char) {
 189                         case 'A':
 190                                 temp += tree_definition.rules_a;
 191                                 break;
 192                         case 'B':
 193                                 temp += tree_definition.rules_b;
 194                                 break;
 195                         case 'C':
 196                                 temp += tree_definition.rules_c;
 197                                 break;
 198                         case 'D':
 199                                 temp += tree_definition.rules_d;
 200                                 break;
 201                         case 'a':
 202                                 if (prop_a >= ps.range(1, 10))
 203                                         temp += tree_definition.rules_a;
 204                                 break;
 205                         case 'b':
 206                                 if (prop_b >= ps.range(1, 10))
 207                                         temp += tree_definition.rules_b;
 208                                 break;
 209                         case 'c':
 210                                 if (prop_c >= ps.range(1, 10))
 211                                         temp += tree_definition.rules_c;
 212                                 break;
 213                         case 'd':
 214                                 if (prop_d >= ps.range(1, 10))
 215                                         temp += tree_definition.rules_d;
 216                                 break;
 217                         default:
 218                                 temp += axiom_char;
 219                                 break;
 220                         }
 221                 }
 222                 axiom = temp;
 223         }
 224
 225         //make sure tree is not floating in the air
 226         if (tree_definition.trunk_type == "double") {
 227                 tree_node_placement(
 228                         vmanip,
 229                         v3f(position.X + 1, position.Y - 1, position.Z),
 230                         dirtnode
 231                 );
 232                 tree_node_placement(
 233                         vmanip,
 234                         v3f(position.X, position.Y - 1, position.Z + 1),
 235                         dirtnode
 236                 );
 237                 tree_node_placement(
 238                         vmanip,
 239                         v3f(position.X + 1, position.Y - 1, position.Z + 1),
 240                         dirtnode
 241                 );
 242         } else if (tree_definition.trunk_type == "crossed") {
 243                 tree_node_placement(
 244                         vmanip,
 245                         v3f(position.X + 1, position.Y - 1, position.Z),
 246                         dirtnode
 247                 );
 248                 tree_node_placement(
 249                         vmanip,
 250                         v3f(position.X - 1, position.Y - 1, position.Z),
 251                         dirtnode
 252                 );
 253                 tree_node_placement(
 254                         vmanip,
 255                         v3f(position.X, position.Y - 1, position.Z + 1),
 256                         dirtnode
 257                 );
 258                 tree_node_placement(
 259                         vmanip,
 260                         v3f(position.X, position.Y - 1, position.Z - 1),
 261                         dirtnode
 262                 );
 263         }
 264
 265         /* build tree out of generated axiom
 266
 267         Key for Special L-System Symbols used in Axioms
 268
 269     G  - move forward one unit with the pen up
 270     F  - move forward one unit with the pen down drawing trunks and branches
 271     f  - move forward one unit with the pen down drawing leaves (100% chance)
 272     T  - move forward one unit with the pen down drawing trunks only
 273     R  - move forward one unit with the pen down placing fruit
 274     A  - replace with rules set A
 275     B  - replace with rules set B
 276     C  - replace with rules set C
 277     D  - replace with rules set D
 278     a  - replace with rules set A, chance 90%
 279     b  - replace with rules set B, chance 80%
 280     c  - replace with rules set C, chance 70%
 281     d  - replace with rules set D, chance 60%
 282     +  - yaw the turtle right by angle degrees
 283     -  - yaw the turtle left by angle degrees
 284     &  - pitch the turtle down by angle degrees
 285     ^  - pitch the turtle up by angle degrees
 286     /  - roll the turtle to the right by angle degrees
 287     *  - roll the turtle to the left by angle degrees
 288     [  - save in stack current state info
 289     ]  - recover from stack state info
 290
 291     */
 292
 293         s16 x,y,z;
 294         for (s16 i = 0; i < (s16)axiom.size(); i++) {
 295                 char axiom_char = axiom.at(i);
 296                 core::matrix4 temp_rotation;
 297                 temp_rotation.makeIdentity();
 298                 v3f dir;
 299                 switch (axiom_char) {
 300                 case 'G':
 301                         dir = v3f(1, 0, 0);
 302                         dir = transposeMatrix(rotation, dir);
 303                         position += dir;
 304                         break;
 305                 case 'T':
 306                         tree_trunk_placement(
 307                                 vmanip,
 308                                 v3f(position.X, position.Y, position.Z),
 309                                 tree_definition
 310                         );
 311                         if (tree_definition.trunk_type == "double" &&
 312                                         !tree_definition.thin_branches) {
 313                                 tree_trunk_placement(
 314                                         vmanip,
 315                                         v3f(position.X + 1, position.Y, position.Z),
 316                                         tree_definition
 317                                 );
 318                                 tree_trunk_placement(
 319                                         vmanip,
 320                                         v3f(position.X, position.Y, position.Z + 1),
 321                                         tree_definition
 322                                 );
 323                                 tree_trunk_placement(
 324                                         vmanip,
 325                                         v3f(position.X + 1, position.Y, position.Z + 1),
 326                                         tree_definition
 327                                 );
 328                         } else if (tree_definition.trunk_type == "crossed" &&
 329                                         !tree_definition.thin_branches) {
 330                                 tree_trunk_placement(
 331                                         vmanip,
 332                                         v3f(position.X + 1, position.Y, position.Z),
 333                                         tree_definition
 334                                 );
 335                                 tree_trunk_placement(
 336                                         vmanip,
 337                                         v3f(position.X - 1, position.Y, position.Z),
 338                                         tree_definition
 339                                 );
 340                                 tree_trunk_placement(
 341                                         vmanip,
 342                                         v3f(position.X, position.Y, position.Z + 1),
 343                                         tree_definition
 344                                 );
 345                                 tree_trunk_placement(
 346                                         vmanip,
 347                                         v3f(position.X, position.Y, position.Z - 1),
 348                                         tree_definition
 349                                 );
 350                         }
 351                         dir = v3f(1, 0, 0);
 352                         dir = transposeMatrix(rotation, dir);
 353                         position += dir;
 354                         break;
 355                 case 'F':
 356                         tree_trunk_placement(
 357                                 vmanip,
 358                                 v3f(position.X, position.Y, position.Z),
 359                                 tree_definition
 360                         );
 361                         if ((stack_orientation.empty() &&
 362                                         tree_definition.trunk_type == "double") ||
 363                                         (!stack_orientation.empty() &&
 364                                         tree_definition.trunk_type == "double" &&
 365                                         !tree_definition.thin_branches)) {
 366                                 tree_trunk_placement(
 367                                         vmanip,
 368                                         v3f(position.X +1 , position.Y, position.Z),
 369                                         tree_definition
 370                                 );
 371                                 tree_trunk_placement(
 372                                         vmanip,
 373                                         v3f(position.X, position.Y, position.Z + 1),
 374                                         tree_definition
 375                                 );
 376                                 tree_trunk_placement(
 377                                         vmanip,
 378                                         v3f(position.X + 1, position.Y, position.Z + 1),
 379                                         tree_definition
 380                                 );
 381                         } else if ((stack_orientation.empty() &&
 382                                         tree_definition.trunk_type == "crossed") ||
 383                                         (!stack_orientation.empty() &&
 384                                         tree_definition.trunk_type == "crossed" &&
 385                                         !tree_definition.thin_branches)) {
 386                                 tree_trunk_placement(
 387                                         vmanip,
 388                                         v3f(position.X + 1, position.Y, position.Z),
 389                                         tree_definition
 390                                 );
 391                                 tree_trunk_placement(
 392                                         vmanip,
 393                                         v3f(position.X - 1, position.Y, position.Z),
 394                                         tree_definition
 395                                 );
 396                                 tree_trunk_placement(
 397                                         vmanip,
 398                                         v3f(position.X, position.Y, position.Z + 1),
 399                                         tree_definition
 400                                 );
 401                                 tree_trunk_placement(
 402                                         vmanip,
 403                                         v3f(position.X, position.Y, position.Z - 1),
 404                                         tree_definition
 405                                 );
 406                         } if (stack_orientation.empty() == false) {
 407                                 s16 size = 1;
 408                                 for (x = -size; x <= size; x++)
 409                                 for (y = -size; y <= size; y++)
 410                                 for (z = -size; z <= size; z++) {
 411                                         if (abs(x) == size &&
 412                                                         abs(y) == size &&
 413                                                         abs(z) == size) {
 414                                                 tree_leaves_placement(
 415                                                         vmanip,
 416                                                         v3f(position.X + x + 1, position.Y + y,
 417                                                                         position.Z + z),
 418                                                         ps.next(),
 419                                                         tree_definition
 420                                                 );
 421                                                 tree_leaves_placement(
 422                                                         vmanip,
 423                                                         v3f(position.X + x - 1, position.Y + y,
 424                                                                         position.Z + z),
 425                                                         ps.next(),
 426                                                         tree_definition
 427                                                 );
 428                                                 tree_leaves_placement(
 429                                                         vmanip,v3f(position.X + x, position.Y + y,
 430                                                                         position.Z + z + 1),
 431                                                         ps.next(),
 432                                                         tree_definition
 433                                                 );
 434                                                 tree_leaves_placement(
 435                                                         vmanip,v3f(position.X + x, position.Y + y,
 436                                                                         position.Z + z - 1),
 437                                                         ps.next(),
 438                                                         tree_definition
 439                                                 );
 440                                         }
 441                                 }
 442                         }
 443                         dir = v3f(1, 0, 0);
 444                         dir = transposeMatrix(rotation, dir);
 445                         position += dir;
 446                         break;
 447                 case 'f':
 448                         tree_single_leaves_placement(
 449                                 vmanip,
 450                                 v3f(position.X, position.Y, position.Z),
 451                                 ps.next(),
 452                                 tree_definition
 453                         );
 454                         dir = v3f(1, 0, 0);
 455                         dir = transposeMatrix(rotation, dir);
 456                         position += dir;
 457                         break;
 458                 case 'R':
 459                         tree_fruit_placement(
 460                                 vmanip,
 461                                 v3f(position.X, position.Y, position.Z),
 462                                 tree_definition
 463                         );
 464                         dir = v3f(1, 0, 0);
 465                         dir = transposeMatrix(rotation, dir);
 466                         position += dir;
 467                         break;
 468
 469                 // turtle orientation commands
 470                 case '[':
 471                         stack_orientation.push(rotation);
 472                         stack_position.push(position);
 473                         break;
 474                 case ']':
 475                         if (stack_orientation.empty())
 476                                 return UNBALANCED_BRACKETS;
 477                         rotation = stack_orientation.top();
 478                         stack_orientation.pop();
 479                         position = stack_position.top();
 480                         stack_position.pop();
 481                         break;
 482                 case '+':
 483                         temp_rotation.makeIdentity();
 484                         temp_rotation = setRotationAxisRadians(temp_rotation,
 485                                         angle_in_radians + angleOffset_in_radians, v3f(0, 0, 1));
 486                         rotation *= temp_rotation;
 487                         break;
 488                 case '-':
 489                         temp_rotation.makeIdentity();
 490                         temp_rotation = setRotationAxisRadians(temp_rotation,
 491                                         angle_in_radians + angleOffset_in_radians, v3f(0, 0, -1));
 492                         rotation *= temp_rotation;
 493                         break;
 494                 case '&':
 495                         temp_rotation.makeIdentity();
 496                         temp_rotation = setRotationAxisRadians(temp_rotation,
 497                                         angle_in_radians + angleOffset_in_radians, v3f(0, 1, 0));
 498                         rotation *= temp_rotation;
 499                         break;
 500                 case '^':
 501                         temp_rotation.makeIdentity();
 502                         temp_rotation = setRotationAxisRadians(temp_rotation,
 503                                         angle_in_radians + angleOffset_in_radians, v3f(0, -1, 0));
 504                         rotation *= temp_rotation;
 505                         break;
 506                 case '*':
 507                         temp_rotation.makeIdentity();
 508                         temp_rotation = setRotationAxisRadians(temp_rotation,
 509                                         angle_in_radians, v3f(1, 0, 0));
 510                         rotation *= temp_rotation;
 511                         break;
 512                 case '/':
 513                         temp_rotation.makeIdentity();
 514                         temp_rotation = setRotationAxisRadians(temp_rotation,
 515                                         angle_in_radians, v3f(-1, 0, 0));
 516                         rotation *= temp_rotation;
 517                         break;
 518                 default:
 519                         break;
 520                 }
 521         }
 522
 523         return SUCCESS;
 524 }
 525
 526
 527 void tree_node_placement(MMVManip &vmanip, v3f p0, MapNode node)
 528 {
 529         v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
 530         if (vmanip.m_area.contains(p1) == false)
 531                 return;
 532         u32 vi = vmanip.m_area.index(p1);
 533         if (vmanip.m_data[vi].getContent() != CONTENT_AIR
 534                         && vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
 535                 return;
 536         vmanip.m_data[vmanip.m_area.index(p1)] = node;
 537 }
 538
 539
 540 void tree_trunk_placement(MMVManip &vmanip, v3f p0, TreeDef &tree_definition)
 541 {
 542         v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
 543         if (vmanip.m_area.contains(p1) == false)
 544                 return;
 545         u32 vi = vmanip.m_area.index(p1);
 546         content_t current_node = vmanip.m_data[vi].getContent();
 547         if (current_node != CONTENT_AIR && current_node != CONTENT_IGNORE
 548                         && current_node != tree_definition.leavesnode.getContent()
 549                         && current_node != tree_definition.leaves2node.getContent()
 550                         && current_node != tree_definition.fruitnode.getContent())
 551                 return;
 552         vmanip.m_data[vi] = tree_definition.trunknode;
 553 }
 554
 555
 556 void tree_leaves_placement(MMVManip &vmanip, v3f p0,
 557                 PseudoRandom ps, TreeDef &tree_definition)
 558 {
 559         MapNode leavesnode = tree_definition.leavesnode;
 560         if (ps.range(1, 100) > 100 - tree_definition.leaves2_chance)
 561                 leavesnode = tree_definition.leaves2node;
 562         v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
 563         if (vmanip.m_area.contains(p1) == false)
 564                 return;
 565         u32 vi = vmanip.m_area.index(p1);
 566         if (vmanip.m_data[vi].getContent() != CONTENT_AIR
 567                         && vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
 568                 return;
 569         if (tree_definition.fruit_chance > 0) {
 570                 if (ps.range(1, 100) > 100 - tree_definition.fruit_chance)
 571                         vmanip.m_data[vmanip.m_area.index(p1)] = tree_definition.fruitnode;
 572                 else
 573                         vmanip.m_data[vmanip.m_area.index(p1)] = leavesnode;
 574         } else if (ps.range(1, 100) > 20) {
 575                 vmanip.m_data[vmanip.m_area.index(p1)] = leavesnode;
 576         }
 577 }
 578
 579
 580 void tree_single_leaves_placement(MMVManip &vmanip, v3f p0,
 581                 PseudoRandom ps, TreeDef &tree_definition)
 582 {
 583         MapNode leavesnode = tree_definition.leavesnode;
 584         if (ps.range(1, 100) > 100 - tree_definition.leaves2_chance)
 585                 leavesnode = tree_definition.leaves2node;
 586         v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
 587         if (vmanip.m_area.contains(p1) == false)
 588                 return;
 589         u32 vi = vmanip.m_area.index(p1);
 590         if (vmanip.m_data[vi].getContent() != CONTENT_AIR
 591                         && vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
 592                 return;
 593         vmanip.m_data[vmanip.m_area.index(p1)] = leavesnode;
 594 }
 595
 596
 597 void tree_fruit_placement(MMVManip &vmanip, v3f p0, TreeDef &tree_definition)
 598 {
 599         v3s16 p1 = v3s16(myround(p0.X), myround(p0.Y), myround(p0.Z));
 600         if (vmanip.m_area.contains(p1) == false)
 601                 return;
 602         u32 vi = vmanip.m_area.index(p1);
 603         if (vmanip.m_data[vi].getContent() != CONTENT_AIR
 604                         && vmanip.m_data[vi].getContent() != CONTENT_IGNORE)
 605                 return;
 606         vmanip.m_data[vmanip.m_area.index(p1)] = tree_definition.fruitnode;
 607 }
 608
 609
 610 irr::core::matrix4 setRotationAxisRadians(irr::core::matrix4 M, double angle, v3f axis)
 611 {
 612         double c = cos(angle);
 613         double s = sin(angle);
 614         double t = 1.0 - c;
 615
 616         double tx  = t * axis.X;
 617         double ty  = t * axis.Y;
 618         double tz  = t * axis.Z;
 619         double sx  = s * axis.X;
 620         double sy  = s * axis.Y;
 621         double sz  = s * axis.Z;
 622
 623         M[0] = tx * axis.X + c;
 624         M[1] = tx * axis.Y + sz;
 625         M[2] = tx * axis.Z - sy;
 626
 627         M[4] = ty * axis.X - sz;
 628         M[5] = ty * axis.Y + c;
 629         M[6] = ty * axis.Z + sx;
 630
 631         M[8]  = tz * axis.X + sy;
 632         M[9]  = tz * axis.Y - sx;
 633         M[10] = tz * axis.Z + c;
 634         return M;
 635 }
 636
 637
 638 v3f transposeMatrix(irr::core::matrix4 M, v3f v)
 639 {
 640         v3f translated;
 641         double x = M[0] * v.X + M[4] * v.Y + M[8]  * v.Z +M[12];
 642         double y = M[1] * v.X + M[5] * v.Y + M[9]  * v.Z +M[13];
 643         double z = M[2] * v.X + M[6] * v.Y + M[10] * v.Z +M[14];
 644         translated.X = x;
 645         translated.Y = y;
 646         translated.Z = z;
 647         return translated;
 648 }
 649
 650
 651 void make_jungletree(MMVManip &vmanip, v3s16 p0, INodeDefManager *ndef, s32 seed)
 652 {
 653         /*
 654                 NOTE: Tree-placing code is currently duplicated in the engine
 655                 and in games that have saplings; both are deprecated but not
 656                 replaced yet
 657         */
 658         content_t c_tree   = ndef->getId("mapgen_jungletree");
 659         content_t c_leaves = ndef->getId("mapgen_jungleleaves");
 660         if (c_tree == CONTENT_IGNORE)
 661                 c_tree = ndef->getId("mapgen_tree");
 662         if (c_leaves == CONTENT_IGNORE)
 663                 c_leaves = ndef->getId("mapgen_leaves");
 664
 665         MapNode treenode(c_tree);
 666         MapNode leavesnode(c_leaves);
 667
 668         PseudoRandom pr(seed);
 669         for (s16 x= -1; x <= 1; x++)
 670         for (s16 z= -1; z <= 1; z++) {
 671                 if (pr.range(0, 2) == 0)
 672                         continue;
 673                 v3s16 p1 = p0 + v3s16(x, 0, z);
 674                 v3s16 p2 = p0 + v3s16(x, -1, z);
 675                 u32 vi1 = vmanip.m_area.index(p1);
 676                 u32 vi2 = vmanip.m_area.index(p2);
 677
 678                 if (vmanip.m_area.contains(p2) &&
 679                                 vmanip.m_data[vi2].getContent() == CONTENT_AIR)
 680                         vmanip.m_data[vi2] = treenode;
 681                 else if (vmanip.m_area.contains(p1) &&
 682                                 vmanip.m_data[vi1].getContent() == CONTENT_AIR)
 683                         vmanip.m_data[vi1] = treenode;
 684         }
 685         vmanip.m_data[vmanip.m_area.index(p0)] = treenode;
 686
 687         s16 trunk_h = pr.range(8, 12);
 688         v3s16 p1 = p0;
 689         for (s16 ii = 0; ii < trunk_h; ii++) {
 690                 if (vmanip.m_area.contains(p1)) {
 691                         u32 vi = vmanip.m_area.index(p1);
 692                         vmanip.m_data[vi] = treenode;
 693                 }
 694                 p1.Y++;
 695         }
 696
 697         // p1 is now the last piece of the trunk
 698         p1.Y -= 1;
 699
 700         VoxelArea leaves_a(v3s16(-3, -2, -3), v3s16(3, 2, 3));
 701         //SharedPtr<u8> leaves_d(new u8[leaves_a.getVolume()]);
 702         Buffer<u8> leaves_d(leaves_a.getVolume());
 703         for (s32 i = 0; i < leaves_a.getVolume(); i++)
 704                 leaves_d[i] = 0;
 705
 706         // Force leaves at near the end of the trunk
 707         s16 d = 1;
 708         for (s16 z = -d; z <= d; z++)
 709         for (s16 y = -d; y <= d; y++)
 710         for (s16 x = -d; x <= d; x++) {
 711                 leaves_d[leaves_a.index(v3s16(x,y,z))] = 1;
 712         }
 713
 714         // Add leaves randomly
 715         for (u32 iii = 0; iii < 30; iii++) {
 716                 v3s16 p(
 717                         pr.range(leaves_a.MinEdge.X, leaves_a.MaxEdge.X - d),
 718                         pr.range(leaves_a.MinEdge.Y, leaves_a.MaxEdge.Y - d),
 719                         pr.range(leaves_a.MinEdge.Z, leaves_a.MaxEdge.Z - d)
 720                 );
 721
 722                 for (s16 z = 0; z <= d; z++)
 723                 for (s16 y = 0; y <= d; y++)
 724                 for (s16 x = 0; x <= d; x++) {
 725                         leaves_d[leaves_a.index(p + v3s16(x, y, z))] = 1;
 726                 }
 727         }
 728
 729         // Blit leaves to vmanip
 730         for (s16 z = leaves_a.MinEdge.Z; z <= leaves_a.MaxEdge.Z; z++)
 731         for (s16 y = leaves_a.MinEdge.Y; y <= leaves_a.MaxEdge.Y; y++) {
 732                 v3s16 pmin(leaves_a.MinEdge.X, y, z);
 733                 u32 i = leaves_a.index(pmin);
 734                 u32 vi = vmanip.m_area.index(pmin + p1);
 735                 for (s16 x = leaves_a.MinEdge.X; x <= leaves_a.MaxEdge.X; x++) {
 736                         v3s16 p(x, y, z);
 737                         if (vmanip.m_area.contains(p + p1) == true &&
 738                                         (vmanip.m_data[vi].getContent() == CONTENT_AIR ||
 739                                         vmanip.m_data[vi].getContent() == CONTENT_IGNORE)) {
 740                                 if (leaves_d[i] == 1)
 741                                         vmanip.m_data[vi] = leavesnode;
 742                         }
 743                         vi++;
 744                         i++;
 745                 }
 746         }
 747 }
 748
 749
 750 void make_pine_tree(MMVManip &vmanip, v3s16 p0, INodeDefManager *ndef, s32 seed)
 751 {
 752         /*
 753                 NOTE: Tree-placing code is currently duplicated in the engine
 754                 and in games that have saplings; both are deprecated but not
 755                 replaced yet
 756         */
 757         content_t c_tree   = ndef->getId("mapgen_pine_tree");
 758         content_t c_leaves = ndef->getId("mapgen_pine_needles");
 759         content_t c_snow = ndef->getId("mapgen_snow");
 760         if (c_tree == CONTENT_IGNORE)
 761                 c_tree = ndef->getId("mapgen_tree");
 762         if (c_leaves == CONTENT_IGNORE)
 763                 c_leaves = ndef->getId("mapgen_leaves");
 764         if (c_snow == CONTENT_IGNORE)
 765                 c_snow = CONTENT_AIR;
 766
 767         MapNode treenode(c_tree);
 768         MapNode leavesnode(c_leaves);
 769         MapNode snownode(c_snow);
 770
 771         PseudoRandom pr(seed);
 772         u16 trunk_h = pr.range(9, 13);
 773         v3s16 p1 = p0;
 774         for (u16 ii = 0; ii < trunk_h; ii++) {
 775                 if (vmanip.m_area.contains(p1)) {
 776                         u32 vi = vmanip.m_area.index(p1);
 777                         vmanip.m_data[vi] = treenode;
 778                 }
 779                 p1.Y++;
 780         }
 781
 782         // Make p1 the top node of the trunk
 783         p1.Y -= 1;
 784
 785         VoxelArea leaves_a(v3s16(-3, -6, -3), v3s16(3, 3, 3));
 786         Buffer<u8> leaves_d(leaves_a.getVolume());
 787         for (s32 i = 0; i < leaves_a.getVolume(); i++)
 788                 leaves_d[i] = 0;
 789
 790         // Upper branches
 791         u16 dev = 3;
 792         for (s16 yy = -1; yy <= 1; yy++) {
 793                 for (s16 zz = -dev; zz <= dev; zz++) {
 794                         u32 i = leaves_a.index(v3s16(-dev, yy, zz));
 795                         u32 ia = leaves_a.index(v3s16(-dev, yy+1, zz));
 796                         for (s16 xx = -dev; xx <= dev; xx++) {
 797                                 if (pr.range(0, 20) <= 19 - dev) {
 798                                         leaves_d[i] = 1;
 799                                         leaves_d[ia] = 2;
 800                                 }
 801                                 i++;
 802                                 ia++;
 803                         }
 804                 }
 805                 dev--;
 806         }
 807
 808         // Centre top nodes
 809         leaves_d[leaves_a.index(v3s16(0, 1, 0))] = 1;
 810         leaves_d[leaves_a.index(v3s16(0, 2, 0))] = 1;
 811         leaves_d[leaves_a.index(v3s16(0, 3, 0))] = 2;
 812
 813         // Lower branches
 814         s16 my = -6;
 815         for (u32 iii = 0; iii < 20; iii++) {
 816                 s16 xi = pr.range(-3, 2);
 817                 s16 yy = pr.range(-6, -5);
 818                 s16 zi = pr.range(-3, 2);
 819                 if (yy > my)
 820                         my = yy;
 821                 for (s16 zz = zi; zz <= zi + 1; zz++) {
 822                         u32 i = leaves_a.index(v3s16(xi, yy, zz));
 823                         u32 ia = leaves_a.index(v3s16(xi, yy + 1, zz));
 824                         for (s32 xx = xi; xx <= xi + 1; xx++) {
 825                                 leaves_d[i] = 1;
 826                                 if (leaves_d[ia] == 0)
 827                                         leaves_d[ia] = 2;
 828                                 i++;
 829                                 ia++;
 830                         }
 831                 }
 832         }
 833
 834         dev = 2;
 835         for (s16 yy = my + 1; yy <= my + 2; yy++) {
 836                 for (s16 zz = -dev; zz <= dev; zz++) {
 837                         u32 i = leaves_a.index(v3s16(-dev, yy, zz));
 838                         u32 ia = leaves_a.index(v3s16(-dev, yy + 1, zz));
 839                         for (s16 xx = -dev; xx <= dev; xx++) {
 840                                 if (pr.range(0, 20) <= 19 - dev) {
 841                                         leaves_d[i] = 1;
 842                                         leaves_d[ia] = 2;
 843                                 }
 844                                 i++;
 845                                 ia++;
 846                         }
 847                 }
 848                 dev--;
 849         }
 850
 851         // Blit leaves to vmanip
 852         for (s16 z = leaves_a.MinEdge.Z; z <= leaves_a.MaxEdge.Z; z++)
 853         for (s16 y = leaves_a.MinEdge.Y; y <= leaves_a.MaxEdge.Y; y++) {
 854                 v3s16 pmin(leaves_a.MinEdge.X, y, z);
 855                 u32 i = leaves_a.index(pmin);
 856                 u32 vi = vmanip.m_area.index(pmin + p1);
 857                 for (s16 x = leaves_a.MinEdge.X; x <= leaves_a.MaxEdge.X; x++) {
 858                         v3s16 p(x, y, z);
 859                         if (vmanip.m_area.contains(p + p1) == true &&
 860                                         (vmanip.m_data[vi].getContent() == CONTENT_AIR ||
 861                                         vmanip.m_data[vi].getContent() == CONTENT_IGNORE ||
 862                                         vmanip.m_data[vi] == snownode)) {
 863                                 if (leaves_d[i] == 1)
 864                                         vmanip.m_data[vi] = leavesnode;
 865                                 else if (leaves_d[i] == 2)
 866                                         vmanip.m_data[vi] = snownode;
 867                         }
 868                         vi++;
 869                         i++;
 870                 }
 871         }
 872 }
 873
 874 }; // namespace treegen