src/player.cpp

   1 /*
   2 Minetest-m13
   3 Copyright (C) 2010-2011 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 General Public License as published by
   7 the Free Software Foundation; either version 2 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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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 "player.h"
  21 #include "map.h"
  22 #include "connection.h"
  23 #include "constants.h"
  24 #include "utility.h"
  25 #ifndef SERVER
  26 #include <ITextSceneNode.h>
  27 #endif
  28 #include "main.h" // For g_settings
  29 #include "settings.h"
  30 #include "nodedef.h"
  31 #include "collision.h"
  32 #include "environment.h"
  33 #include "gamedef.h"
  34
  35 Player::Player(IGameDef *gamedef):
  36         touching_ground(false),
  37         in_water(false),
  38         in_water_stable(false),
  39         is_climbing(false),
  40         swimming_up(false),
  41         inventory(gamedef->idef()),
  42         inventory_backup(NULL),
  43         hp(20),
  44         peer_id(PEER_ID_INEXISTENT),
  45 // protected
  46         m_gamedef(gamedef),
  47         m_pitch(0),
  48         m_yaw(0),
  49         m_speed(0,0,0),
  50         m_position(0,0,0)
  51 {
  52         updateName("<not set>");
  53         resetInventory();
  54 }
  55
  56 Player::~Player()
  57 {
  58         delete inventory_backup;
  59 }
  60
  61 void Player::resetInventory()
  62 {
  63         inventory.clear();
  64         inventory.addList("main", PLAYER_INVENTORY_SIZE);
  65         inventory.addList("craft", 9);
  66         inventory.addList("craftpreview", 1);
  67         inventory.addList("craftresult", 1);
  68 }
  69
  70 // Y direction is ignored
  71 void Player::accelerate(v3f target_speed, f32 max_increase)
  72 {
  73         v3f d_wanted = target_speed - m_speed;
  74         d_wanted.Y = 0;
  75         f32 dl_wanted = d_wanted.getLength();
  76         f32 dl = dl_wanted;
  77         if(dl > max_increase)
  78                 dl = max_increase;
  79
  80         v3f d = d_wanted.normalize() * dl;
  81
  82         m_speed.X += d.X;
  83         m_speed.Z += d.Z;
  84         //m_speed += d;
  85
  86 #if 0 // old code
  87         if(m_speed.X < target_speed.X - max_increase)
  88                 m_speed.X += max_increase;
  89         else if(m_speed.X > target_speed.X + max_increase)
  90                 m_speed.X -= max_increase;
  91         else if(m_speed.X < target_speed.X)
  92                 m_speed.X = target_speed.X;
  93         else if(m_speed.X > target_speed.X)
  94                 m_speed.X = target_speed.X;
  95
  96         if(m_speed.Z < target_speed.Z - max_increase)
  97                 m_speed.Z += max_increase;
  98         else if(m_speed.Z > target_speed.Z + max_increase)
  99                 m_speed.Z -= max_increase;
 100         else if(m_speed.Z < target_speed.Z)
 101                 m_speed.Z = target_speed.Z;
 102         else if(m_speed.Z > target_speed.Z)
 103                 m_speed.Z = target_speed.Z;
 104 #endif
 105 }
 106
 107 v3s16 Player::getLightPosition() const
 108 {
 109         return floatToInt(m_position + v3f(0,BS+BS/2,0), BS);
 110 }
 111
 112 void Player::serialize(std::ostream &os)
 113 {
 114         // Utilize a Settings object for storing values
 115         Settings args;
 116         args.setS32("version", 1);
 117         args.set("name", m_name);
 118         //args.set("password", m_password);
 119         args.setFloat("pitch", m_pitch);
 120         args.setFloat("yaw", m_yaw);
 121         args.setV3F("position", m_position);
 122         args.setS32("hp", hp);
 123
 124         args.writeLines(os);
 125
 126         os<<"PlayerArgsEnd\n";
 127
 128         // If actual inventory is backed up due to creative mode, save it
 129         // instead of the dummy creative mode inventory
 130         if(inventory_backup)
 131                 inventory_backup->serialize(os);
 132         else
 133                 inventory.serialize(os);
 134 }
 135
 136 void Player::deSerialize(std::istream &is)
 137 {
 138         Settings args;
 139
 140         for(;;)
 141         {
 142                 if(is.eof())
 143                         throw SerializationError
 144                                         ("Player::deSerialize(): PlayerArgsEnd not found");
 145                 std::string line;
 146                 std::getline(is, line);
 147                 std::string trimmedline = trim(line);
 148                 if(trimmedline == "PlayerArgsEnd")
 149                         break;
 150                 args.parseConfigLine(line);
 151         }
 152
 153         //args.getS32("version"); // Version field value not used
 154         std::string name = args.get("name");
 155         updateName(name.c_str());
 156         setPitch(args.getFloat("pitch"));
 157         setYaw(args.getFloat("yaw"));
 158         setPosition(args.getV3F("position"));
 159         bool craftresult_is_preview = true;
 160         try{
 161                 craftresult_is_preview = args.getBool("craftresult_is_preview");
 162         }catch(SettingNotFoundException &e){}
 163         try{
 164                 hp = args.getS32("hp");
 165         }catch(SettingNotFoundException &e){
 166                 hp = 20;
 167         }
 168
 169         inventory.deSerialize(is);
 170
 171         if(inventory.getList("craftpreview") == NULL)
 172         {
 173                 // Convert players without craftpreview
 174                 inventory.addList("craftpreview", 1);
 175
 176                 if(craftresult_is_preview)
 177                 {
 178                         // Clear craftresult
 179                         inventory.getList("craftresult")->changeItem(0, ItemStack());
 180                 }
 181         }
 182 }
 183
 184 #ifndef SERVER
 185 /*
 186         LocalPlayer
 187 */
 188
 189 LocalPlayer::LocalPlayer(IGameDef *gamedef):
 190         Player(gamedef),
 191         m_sneak_node(32767,32767,32767),
 192         m_sneak_node_exists(false)
 193 {
 194         // Initialize hp to 0, so that no hearts will be shown if server
 195         // doesn't support health points
 196         hp = 0;
 197 }
 198
 199 LocalPlayer::~LocalPlayer()
 200 {
 201 }
 202
 203 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d,
 204                 core::list<CollisionInfo> *collision_info)
 205 {
 206         INodeDefManager *nodemgr = m_gamedef->ndef();
 207
 208         v3f position = getPosition();
 209         v3f oldpos = position;
 210         v3s16 oldpos_i = floatToInt(oldpos, BS);
 211
 212         v3f old_speed = m_speed;
 213
 214         /*std::cout<<"oldpos_i=("<<oldpos_i.X<<","<<oldpos_i.Y<<","
 215                         <<oldpos_i.Z<<")"<<std::endl;*/
 216
 217         /*
 218                 Calculate new position
 219         */
 220         position += m_speed * dtime;
 221
 222         // Skip collision detection if a special movement mode is used
 223         bool free_move = g_settings->getBool("free_move");
 224         if(free_move)
 225         {
 226                 setPosition(position);
 227                 return;
 228         }
 229
 230         /*
 231                 Collision detection
 232         */
 233
 234         // Player position in nodes
 235         v3s16 pos_i = floatToInt(position, BS);
 236
 237         /*
 238                 Check if player is in water (the oscillating value)
 239         */
 240         try{
 241                 // If in water, the threshold of coming out is at higher y
 242                 if(in_water)
 243                 {
 244                         v3s16 pp = floatToInt(position + v3f(0,BS*0.1,0), BS);
 245                         in_water = nodemgr->get(map.getNode(pp).getContent()).isLiquid();
 246                 }
 247                 // If not in water, the threshold of going in is at lower y
 248                 else
 249                 {
 250                         v3s16 pp = floatToInt(position + v3f(0,BS*0.5,0), BS);
 251                         in_water = nodemgr->get(map.getNode(pp).getContent()).isLiquid();
 252                 }
 253         }
 254         catch(InvalidPositionException &e)
 255         {
 256                 in_water = false;
 257         }
 258
 259         /*
 260                 Check if player is in water (the stable value)
 261         */
 262         try{
 263                 v3s16 pp = floatToInt(position + v3f(0,0,0), BS);
 264                 in_water_stable = nodemgr->get(map.getNode(pp).getContent()).isLiquid();
 265         }
 266         catch(InvalidPositionException &e)
 267         {
 268                 in_water_stable = false;
 269         }
 270
 271         /*
 272                 Check if player is climbing
 273         */
 274
 275         try {
 276                 v3s16 pp = floatToInt(position + v3f(0,0.5*BS,0), BS);
 277                 v3s16 pp2 = floatToInt(position + v3f(0,-0.2*BS,0), BS);
 278                 is_climbing = ((nodemgr->get(map.getNode(pp).getContent()).climbable ||
 279                 nodemgr->get(map.getNode(pp2).getContent()).climbable) && !free_move);
 280         }
 281         catch(InvalidPositionException &e)
 282         {
 283                 is_climbing = false;
 284         }
 285
 286         /*
 287                 Collision uncertainty radius
 288                 Make it a bit larger than the maximum distance of movement
 289         */
 290         //f32 d = pos_max_d * 1.1;
 291         // A fairly large value in here makes moving smoother
 292         f32 d = 0.15*BS;
 293
 294         // This should always apply, otherwise there are glitches
 295         assert(d > pos_max_d);
 296
 297         float player_radius = BS*0.35;
 298         float player_height = BS*1.7;
 299
 300         // Maximum distance over border for sneaking
 301         f32 sneak_max = BS*0.4;
 302
 303         /*
 304                 If sneaking, player has larger collision radius to keep from
 305                 falling
 306         */
 307         /*if(control.sneak)
 308                 player_radius = sneak_max + d*1.1;*/
 309
 310         /*
 311                 If sneaking, keep in range from the last walked node and don't
 312                 fall off from it
 313         */
 314         if(control.sneak && m_sneak_node_exists)
 315         {
 316                 f32 maxd = 0.5*BS + sneak_max;
 317                 v3f lwn_f = intToFloat(m_sneak_node, BS);
 318                 position.X = rangelim(position.X, lwn_f.X-maxd, lwn_f.X+maxd);
 319                 position.Z = rangelim(position.Z, lwn_f.Z-maxd, lwn_f.Z+maxd);
 320
 321                 f32 min_y = lwn_f.Y + 0.5*BS;
 322                 if(position.Y < min_y)
 323                 {
 324                         position.Y = min_y;
 325
 326                         //v3f old_speed = m_speed;
 327
 328                         if(m_speed.Y < 0)
 329                                 m_speed.Y = 0;
 330
 331                         /*if(collision_info)
 332                         {
 333                                 // Report fall collision
 334                                 if(old_speed.Y < m_speed.Y - 0.1)
 335                                 {
 336                                         CollisionInfo info;
 337                                         info.t = COLLISION_FALL;
 338                                         info.speed = m_speed.Y - old_speed.Y;
 339                                         collision_info->push_back(info);
 340                                 }
 341                         }*/
 342                 }
 343         }
 344
 345         /*
 346                 Calculate player collision box (new and old)
 347         */
 348         core::aabbox3d<f32> playerbox(
 349                 position.X - player_radius,
 350                 position.Y - 0.0,
 351                 position.Z - player_radius,
 352                 position.X + player_radius,
 353                 position.Y + player_height,
 354                 position.Z + player_radius
 355         );
 356         core::aabbox3d<f32> playerbox_old(
 357                 oldpos.X - player_radius,
 358                 oldpos.Y - 0.0,
 359                 oldpos.Z - player_radius,
 360                 oldpos.X + player_radius,
 361                 oldpos.Y + player_height,
 362                 oldpos.Z + player_radius
 363         );
 364
 365         /*
 366                 If the player's feet touch the topside of any node, this is
 367                 set to true.
 368
 369                 Player is allowed to jump when this is true.
 370         */
 371         touching_ground = false;
 372
 373         /*std::cout<<"Checking collisions for ("
 374                         <<oldpos_i.X<<","<<oldpos_i.Y<<","<<oldpos_i.Z
 375                         <<") -> ("
 376                         <<pos_i.X<<","<<pos_i.Y<<","<<pos_i.Z
 377                         <<"):"<<std::endl;*/
 378
 379         bool standing_on_unloaded = false;
 380
 381         /*
 382                 Go through every node around the player
 383         */
 384         for(s16 y = oldpos_i.Y - 1; y <= oldpos_i.Y + 2; y++)
 385         for(s16 z = oldpos_i.Z - 1; z <= oldpos_i.Z + 1; z++)
 386         for(s16 x = oldpos_i.X - 1; x <= oldpos_i.X + 1; x++)
 387         {
 388                 bool is_unloaded = false;
 389                 try{
 390                         // Player collides into walkable nodes
 391                         if(nodemgr->get(map.getNode(v3s16(x,y,z))).walkable == false)
 392                                 continue;
 393                 }
 394                 catch(InvalidPositionException &e)
 395                 {
 396                         is_unloaded = true;
 397                         // Doing nothing here will block the player from
 398                         // walking over map borders
 399                 }
 400
 401                 core::aabbox3d<f32> nodebox = getNodeBox(v3s16(x,y,z), BS);
 402
 403                 /*
 404                         See if the player is touching ground.
 405
 406                         Player touches ground if player's minimum Y is near node's
 407                         maximum Y and player's X-Z-area overlaps with the node's
 408                         X-Z-area.
 409
 410                         Use 0.15*BS so that it is easier to get on a node.
 411                 */
 412                 if(
 413                                 //fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < d
 414                                 fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < 0.15*BS
 415                                 && nodebox.MaxEdge.X-d > playerbox.MinEdge.X
 416                                 && nodebox.MinEdge.X+d < playerbox.MaxEdge.X
 417                                 && nodebox.MaxEdge.Z-d > playerbox.MinEdge.Z
 418                                 && nodebox.MinEdge.Z+d < playerbox.MaxEdge.Z
 419                 ){
 420                         touching_ground = true;
 421                         if(is_unloaded)
 422                                 standing_on_unloaded = true;
 423                 }
 424
 425                 // If player doesn't intersect with node, ignore node.
 426                 if(playerbox.intersectsWithBox(nodebox) == false)
 427                         continue;
 428
 429                 /*
 430                         Go through every axis
 431                 */
 432                 v3f dirs[3] = {
 433                         v3f(0,0,1), // back-front
 434                         v3f(0,1,0), // top-bottom
 435                         v3f(1,0,0), // right-left
 436                 };
 437                 for(u16 i=0; i<3; i++)
 438                 {
 439                         /*
 440                                 Calculate values along the axis
 441                         */
 442                         f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[i]);
 443                         f32 nodemin = nodebox.MinEdge.dotProduct(dirs[i]);
 444                         f32 playermax = playerbox.MaxEdge.dotProduct(dirs[i]);
 445                         f32 playermin = playerbox.MinEdge.dotProduct(dirs[i]);
 446                         f32 playermax_old = playerbox_old.MaxEdge.dotProduct(dirs[i]);
 447                         f32 playermin_old = playerbox_old.MinEdge.dotProduct(dirs[i]);
 448
 449                         /*
 450                                 Check collision for the axis.
 451                                 Collision happens when player is going through a surface.
 452                         */
 453                         /*f32 neg_d = d;
 454                         f32 pos_d = d;
 455                         // Make it easier to get on top of a node
 456                         if(i == 1)
 457                                 neg_d = 0.15*BS;
 458                         bool negative_axis_collides =
 459                                 (nodemax > playermin && nodemax <= playermin_old + neg_d
 460                                         && m_speed.dotProduct(dirs[i]) < 0);
 461                         bool positive_axis_collides =
 462                                 (nodemin < playermax && nodemin >= playermax_old - pos_d
 463                                         && m_speed.dotProduct(dirs[i]) > 0);*/
 464                         bool negative_axis_collides =
 465                                 (nodemax > playermin && nodemax <= playermin_old + d
 466                                         && m_speed.dotProduct(dirs[i]) < 0);
 467                         bool positive_axis_collides =
 468                                 (nodemin < playermax && nodemin >= playermax_old - d
 469                                         && m_speed.dotProduct(dirs[i]) > 0);
 470                         bool main_axis_collides =
 471                                         negative_axis_collides || positive_axis_collides;
 472
 473                         /*
 474                                 Check overlap of player and node in other axes
 475                         */
 476                         bool other_axes_overlap = true;
 477                         for(u16 j=0; j<3; j++)
 478                         {
 479                                 if(j == i)
 480                                         continue;
 481                                 f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[j]);
 482                                 f32 nodemin = nodebox.MinEdge.dotProduct(dirs[j]);
 483                                 f32 playermax = playerbox.MaxEdge.dotProduct(dirs[j]);
 484                                 f32 playermin = playerbox.MinEdge.dotProduct(dirs[j]);
 485                                 if(!(nodemax - d > playermin && nodemin + d < playermax))
 486                                 {
 487                                         other_axes_overlap = false;
 488                                         break;
 489                                 }
 490                         }
 491
 492                         /*
 493                                 If this is a collision, revert the position in the main
 494                                 direction.
 495                         */
 496                         if(other_axes_overlap && main_axis_collides)
 497                         {
 498                                 //v3f old_speed = m_speed;
 499
 500                                 m_speed -= m_speed.dotProduct(dirs[i]) * dirs[i];
 501                                 position -= position.dotProduct(dirs[i]) * dirs[i];
 502                                 position += oldpos.dotProduct(dirs[i]) * dirs[i];
 503
 504                                 /*if(collision_info)
 505                                 {
 506                                         // Report fall collision
 507                                         if(old_speed.Y < m_speed.Y - 0.1)
 508                                         {
 509                                                 CollisionInfo info;
 510                                                 info.t = COLLISION_FALL;
 511                                                 info.speed = m_speed.Y - old_speed.Y;
 512                                                 collision_info->push_back(info);
 513                                         }
 514                                 }*/
 515                         }
 516
 517                 }
 518         } // xyz
 519
 520         /*
 521                 Check the nodes under the player to see from which node the
 522                 player is sneaking from, if any.
 523         */
 524         {
 525                 v3s16 pos_i_bottom = floatToInt(position - v3f(0,BS/2,0), BS);
 526                 v2f player_p2df(position.X, position.Z);
 527                 f32 min_distance_f = 100000.0*BS;
 528                 // If already seeking from some node, compare to it.
 529                 /*if(m_sneak_node_exists)
 530                 {
 531                         v3f sneaknode_pf = intToFloat(m_sneak_node, BS);
 532                         v2f sneaknode_p2df(sneaknode_pf.X, sneaknode_pf.Z);
 533                         f32 d_horiz_f = player_p2df.getDistanceFrom(sneaknode_p2df);
 534                         f32 d_vert_f = fabs(sneaknode_pf.Y + BS*0.5 - position.Y);
 535                         // Ignore if player is not on the same level (likely dropped)
 536                         if(d_vert_f < 0.15*BS)
 537                                 min_distance_f = d_horiz_f;
 538                 }*/
 539                 v3s16 new_sneak_node = m_sneak_node;
 540                 for(s16 x=-1; x<=1; x++)
 541                 for(s16 z=-1; z<=1; z++)
 542                 {
 543                         v3s16 p = pos_i_bottom + v3s16(x,0,z);
 544                         v3f pf = intToFloat(p, BS);
 545                         v2f node_p2df(pf.X, pf.Z);
 546                         f32 distance_f = player_p2df.getDistanceFrom(node_p2df);
 547                         f32 max_axis_distance_f = MYMAX(
 548                                         fabs(player_p2df.X-node_p2df.X),
 549                                         fabs(player_p2df.Y-node_p2df.Y));
 550
 551                         if(distance_f > min_distance_f ||
 552                                         max_axis_distance_f > 0.5*BS + sneak_max + 0.1*BS)
 553                                 continue;
 554
 555                         try{
 556                                 // The node to be sneaked on has to be walkable
 557                                 if(nodemgr->get(map.getNode(p)).walkable == false)
 558                                         continue;
 559                                 // And the node above it has to be nonwalkable
 560                                 if(nodemgr->get(map.getNode(p+v3s16(0,1,0))).walkable == true)
 561                                         continue;
 562                         }
 563                         catch(InvalidPositionException &e)
 564                         {
 565                                 continue;
 566                         }
 567
 568                         min_distance_f = distance_f;
 569                         new_sneak_node = p;
 570                 }
 571
 572                 bool sneak_node_found = (min_distance_f < 100000.0*BS*0.9);
 573
 574                 if(control.sneak && m_sneak_node_exists)
 575                 {
 576                         if(sneak_node_found)
 577                                 m_sneak_node = new_sneak_node;
 578                 }
 579                 else
 580                 {
 581                         m_sneak_node = new_sneak_node;
 582                         m_sneak_node_exists = sneak_node_found;
 583                 }
 584
 585                 /*
 586                         If sneaking, the player's collision box can be in air, so
 587                         this has to be set explicitly
 588                 */
 589                 if(sneak_node_found && control.sneak)
 590                         touching_ground = true;
 591         }
 592
 593         /*
 594                 Set new position
 595         */
 596         setPosition(position);
 597
 598         /*
 599                 Report collisions
 600         */
 601         if(collision_info)
 602         {
 603                 // Report fall collision
 604                 if(old_speed.Y < m_speed.Y - 0.1 && !standing_on_unloaded)
 605                 {
 606                         CollisionInfo info;
 607                         info.t = COLLISION_FALL;
 608                         info.speed = m_speed.Y - old_speed.Y;
 609                         collision_info->push_back(info);
 610                 }
 611         }
 612 }
 613
 614 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 615 {
 616         move(dtime, map, pos_max_d, NULL);
 617 }
 618
 619 void LocalPlayer::applyControl(float dtime)
 620 {
 621         // Clear stuff
 622         swimming_up = false;
 623
 624         // Random constants
 625         f32 walk_acceleration = 4.0 * BS;
 626         f32 walkspeed_max = 4.0 * BS;
 627
 628         setPitch(control.pitch);
 629         setYaw(control.yaw);
 630
 631         v3f move_direction = v3f(0,0,1);
 632         move_direction.rotateXZBy(getYaw());
 633
 634         v3f speed = v3f(0,0,0);
 635
 636         bool free_move = g_settings->getBool("free_move");
 637         bool fast_move = g_settings->getBool("fast_move");
 638         bool continuous_forward = g_settings->getBool("continuous_forward");
 639
 640         if(free_move || is_climbing)
 641         {
 642                 v3f speed = getSpeed();
 643                 speed.Y = 0;
 644                 setSpeed(speed);
 645         }
 646
 647         // Whether superspeed mode is used or not
 648         bool superspeed = false;
 649
 650         // If free movement and fast movement, always move fast
 651         if(free_move && fast_move)
 652                 superspeed = true;
 653
 654         // Auxiliary button 1 (E)
 655         if(control.aux1)
 656         {
 657                 if(free_move)
 658                 {
 659                         // In free movement mode, aux1 descends
 660                         v3f speed = getSpeed();
 661                         if(fast_move)
 662                                 speed.Y = -20*BS;
 663                         else
 664                                 speed.Y = -walkspeed_max;
 665                         setSpeed(speed);
 666                 }
 667                 else if(is_climbing)
 668                 {
 669                         v3f speed = getSpeed();
 670                         speed.Y = -3*BS;
 671                         setSpeed(speed);
 672                 }
 673                 else
 674                 {
 675                         // If not free movement but fast is allowed, aux1 is
 676                         // "Turbo button"
 677                         if(fast_move)
 678                                 superspeed = true;
 679                 }
 680         }
 681
 682         if(continuous_forward)
 683                 speed += move_direction;
 684
 685         if(control.up)
 686         {
 687                 if(continuous_forward)
 688                         superspeed = true;
 689                 else
 690                         speed += move_direction;
 691         }
 692         if(control.down)
 693         {
 694                 speed -= move_direction;
 695         }
 696         if(control.left)
 697         {
 698                 speed += move_direction.crossProduct(v3f(0,1,0));
 699         }
 700         if(control.right)
 701         {
 702                 speed += move_direction.crossProduct(v3f(0,-1,0));
 703         }
 704         if(control.jump)
 705         {
 706                 if(free_move)
 707                 {
 708                         v3f speed = getSpeed();
 709                         if(fast_move)
 710                                 speed.Y = 20*BS;
 711                         else
 712                                 speed.Y = walkspeed_max;
 713                         setSpeed(speed);
 714                 }
 715                 else if(touching_ground)
 716                 {
 717                         v3f speed = getSpeed();
 718                         /*
 719                                 NOTE: The d value in move() affects jump height by
 720                                 raising the height at which the jump speed is kept
 721                                 at its starting value
 722                         */
 723                         speed.Y = 6.5*BS;
 724                         setSpeed(speed);
 725                 }
 726                 // Use the oscillating value for getting out of water
 727                 // (so that the player doesn't fly on the surface)
 728                 else if(in_water)
 729                 {
 730                         v3f speed = getSpeed();
 731                         speed.Y = 1.5*BS;
 732                         setSpeed(speed);
 733                         swimming_up = true;
 734                 }
 735                 else if(is_climbing)
 736                 {
 737                         v3f speed = getSpeed();
 738                         speed.Y = 3*BS;
 739                         setSpeed(speed);
 740                 }
 741         }
 742
 743         // The speed of the player (Y is ignored)
 744         if(superspeed)
 745                 speed = speed.normalize() * walkspeed_max * 5.0;
 746         else if(control.sneak)
 747                 speed = speed.normalize() * walkspeed_max / 3.0;
 748         else
 749                 speed = speed.normalize() * walkspeed_max;
 750
 751         f32 inc = walk_acceleration * BS * dtime;
 752
 753         // Faster acceleration if fast and free movement
 754         if(free_move && fast_move)
 755                 inc = walk_acceleration * BS * dtime * 10;
 756
 757         // Accelerate to target speed with maximum increment
 758         accelerate(speed, inc);
 759 }
 760 #endif
 761