src/player.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010 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 /*
  21 (c) 2010 Perttu Ahola <celeron55@gmail.com>
  22 */
  23
  24 #include "player.h"
  25 #include "map.h"
  26 #include "connection.h"
  27 #include "constants.h"
  28 #include "utility.h"
  29
  30 Player::Player():
  31         touching_ground(false),
  32         in_water(false),
  33         in_water_stable(false),
  34         swimming_up(false),
  35         peer_id(PEER_ID_INEXISTENT),
  36         m_pitch(0),
  37         m_yaw(0),
  38         m_speed(0,0,0),
  39         m_position(0,0,0)
  40 {
  41         updateName("<not set>");
  42         resetInventory();
  43 }
  44
  45 Player::~Player()
  46 {
  47 }
  48
  49 void Player::resetInventory()
  50 {
  51         inventory.clear();
  52         inventory.addList("main", PLAYER_INVENTORY_SIZE);
  53         inventory.addList("craft", 9);
  54         inventory.addList("craftresult", 1);
  55 }
  56
  57 // Y direction is ignored
  58 void Player::accelerate(v3f target_speed, f32 max_increase)
  59 {
  60         v3f d_wanted = target_speed - m_speed;
  61         d_wanted.Y = 0;
  62         f32 dl_wanted = d_wanted.getLength();
  63         f32 dl = dl_wanted;
  64         if(dl > max_increase)
  65                 dl = max_increase;
  66
  67         v3f d = d_wanted.normalize() * dl;
  68
  69         m_speed.X += d.X;
  70         m_speed.Z += d.Z;
  71         //m_speed += d;
  72
  73 #if 0 // old code
  74         if(m_speed.X < target_speed.X - max_increase)
  75                 m_speed.X += max_increase;
  76         else if(m_speed.X > target_speed.X + max_increase)
  77                 m_speed.X -= max_increase;
  78         else if(m_speed.X < target_speed.X)
  79                 m_speed.X = target_speed.X;
  80         else if(m_speed.X > target_speed.X)
  81                 m_speed.X = target_speed.X;
  82
  83         if(m_speed.Z < target_speed.Z - max_increase)
  84                 m_speed.Z += max_increase;
  85         else if(m_speed.Z > target_speed.Z + max_increase)
  86                 m_speed.Z -= max_increase;
  87         else if(m_speed.Z < target_speed.Z)
  88                 m_speed.Z = target_speed.Z;
  89         else if(m_speed.Z > target_speed.Z)
  90                 m_speed.Z = target_speed.Z;
  91 #endif
  92 }
  93
  94 void Player::serialize(std::ostream &os)
  95 {
  96         // Utilize a Settings object for storing values
  97         Settings args;
  98         args.setS32("version", 1);
  99         args.set("name", m_name);
 100         args.setFloat("pitch", m_pitch);
 101         args.setFloat("yaw", m_yaw);
 102         args.setV3F("position", m_position);
 103
 104         args.writeLines(os);
 105
 106         os<<"PlayerArgsEnd\n";
 107
 108         inventory.serialize(os);
 109 }
 110
 111 void Player::deSerialize(std::istream &is)
 112 {
 113         Settings args;
 114
 115         for(;;)
 116         {
 117                 if(is.eof())
 118                         throw SerializationError
 119                                         ("Player::deSerialize(): PlayerArgsEnd not found");
 120                 std::string line;
 121                 std::getline(is, line);
 122                 std::string trimmedline = trim(line);
 123                 if(trimmedline == "PlayerArgsEnd")
 124                         break;
 125                 args.parseConfigLine(line);
 126         }
 127
 128         //args.getS32("version");
 129         std::string name = args.get("name");
 130         updateName(name.c_str());
 131         m_pitch = args.getFloat("pitch");
 132         m_yaw = args.getFloat("yaw");
 133         m_position = args.getV3F("position");
 134
 135         inventory.deSerialize(is);
 136 }
 137
 138 /*
 139         RemotePlayer
 140 */
 141
 142 #ifndef SERVER
 143
 144 RemotePlayer::RemotePlayer(
 145                 scene::ISceneNode* parent,
 146                 IrrlichtDevice *device,
 147                 s32 id):
 148         scene::ISceneNode(parent, (device==NULL)?NULL:device->getSceneManager(), id),
 149         m_text(NULL)
 150 {
 151         m_box = core::aabbox3d<f32>(-BS/2,0,-BS/2,BS/2,BS*2,BS/2);
 152
 153         if(parent != NULL && device != NULL)
 154         {
 155                 // ISceneNode stores a member called SceneManager
 156                 scene::ISceneManager* mgr = SceneManager;
 157                 video::IVideoDriver* driver = mgr->getVideoDriver();
 158                 gui::IGUIEnvironment* gui = device->getGUIEnvironment();
 159
 160                 // Add a text node for showing the name
 161                 wchar_t wname[1] = {0};
 162                 m_text = mgr->addTextSceneNode(gui->getBuiltInFont(),
 163                                 wname, video::SColor(255,255,255,255), this);
 164                 m_text->setPosition(v3f(0, (f32)BS*2.1, 0));
 165
 166                 // Attach a simple mesh to the player for showing an image
 167                 scene::SMesh *mesh = new scene::SMesh();
 168                 { // Front
 169                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 170                 video::SColor c(255,255,255,255);
 171                 video::S3DVertex vertices[4] =
 172                 {
 173                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 174                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 175                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 176                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 177                 };
 178                 u16 indices[] = {0,1,2,2,3,0};
 179                 buf->append(vertices, 4, indices, 6);
 180                 // Set material
 181                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 182                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 183                 buf->getMaterial().setTexture(0, driver->getTexture(porting::getDataPath("player.png").c_str()));
 184                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 185                 buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
 186                 //buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 187                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 188                 // Add to mesh
 189                 mesh->addMeshBuffer(buf);
 190                 buf->drop();
 191                 }
 192                 { // Back
 193                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 194                 video::SColor c(255,255,255,255);
 195                 video::S3DVertex vertices[4] =
 196                 {
 197                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 198                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 199                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 200                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 201                 };
 202                 u16 indices[] = {0,1,2,2,3,0};
 203                 buf->append(vertices, 4, indices, 6);
 204                 // Set material
 205                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 206                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 207                 buf->getMaterial().setTexture(0, driver->getTexture(porting::getDataPath("player_back.png").c_str()));
 208                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 209                 buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
 210                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 211                 // Add to mesh
 212                 mesh->addMeshBuffer(buf);
 213                 buf->drop();
 214                 }
 215                 m_node = mgr->addMeshSceneNode(mesh, this);
 216                 mesh->drop();
 217                 m_node->setPosition(v3f(0,0,0));
 218         }
 219 }
 220
 221 RemotePlayer::~RemotePlayer()
 222 {
 223         if(SceneManager != NULL)
 224                 ISceneNode::remove();
 225 }
 226
 227 void RemotePlayer::updateName(const char *name)
 228 {
 229         Player::updateName(name);
 230         if(m_text != NULL)
 231         {
 232                 wchar_t wname[PLAYERNAME_SIZE];
 233                 mbstowcs(wname, m_name, strlen(m_name)+1);
 234                 m_text->setText(wname);
 235         }
 236 }
 237
 238 void RemotePlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 239 {
 240         m_pos_animation_time_counter += dtime;
 241         m_pos_animation_counter += dtime;
 242         v3f movevector = m_position - m_oldpos;
 243         f32 moveratio;
 244         if(m_pos_animation_time < 0.001)
 245                 moveratio = 1.0;
 246         else
 247                 moveratio = m_pos_animation_counter / m_pos_animation_time;
 248         if(moveratio > 1.5)
 249                 moveratio = 1.5;
 250         m_showpos = m_oldpos + movevector * moveratio;
 251
 252         ISceneNode::setPosition(m_showpos);
 253 }
 254
 255 #endif
 256
 257 #ifndef SERVER
 258 /*
 259         LocalPlayer
 260 */
 261
 262 LocalPlayer::LocalPlayer():
 263         m_last_walked_node(32767,32767,32767)
 264 {
 265 }
 266
 267 LocalPlayer::~LocalPlayer()
 268 {
 269 }
 270
 271 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 272 {
 273         v3f position = getPosition();
 274         v3f oldpos = position;
 275         v3s16 oldpos_i = floatToInt(oldpos);
 276
 277         /*std::cout<<"oldpos_i=("<<oldpos_i.X<<","<<oldpos_i.Y<<","
 278                         <<oldpos_i.Z<<")"<<std::endl;*/
 279
 280         /*
 281                 Calculate new position
 282         */
 283         position += m_speed * dtime;
 284
 285         // Skip collision detection if a special movement mode is used
 286         bool free_move = g_settings.getBool("free_move");
 287         if(free_move)
 288         {
 289                 setPosition(position);
 290                 return;
 291         }
 292
 293         /*
 294                 Collision detection
 295         */
 296
 297         // Player position in nodes
 298         v3s16 pos_i = floatToInt(position);
 299
 300         /*
 301                 Check if player is in water (the oscillating value)
 302         */
 303         try{
 304                 // If in water, the threshold of coming out is at higher y
 305                 if(in_water)
 306                 {
 307                         v3s16 pp = floatToInt(position + v3f(0,BS*0.1,0));
 308                         in_water = content_liquid(map.getNode(pp).d);
 309                 }
 310                 // If not in water, the threshold of going in is at lower y
 311                 else
 312                 {
 313                         v3s16 pp = floatToInt(position + v3f(0,BS*0.5,0));
 314                         in_water = content_liquid(map.getNode(pp).d);
 315                 }
 316         }
 317         catch(InvalidPositionException &e)
 318         {
 319                 in_water = false;
 320         }
 321
 322         /*
 323                 Check if player is in water (the stable value)
 324         */
 325         try{
 326                 v3s16 pp = floatToInt(position + v3f(0,0,0));
 327                 in_water_stable = content_liquid(map.getNode(pp).d);
 328         }
 329         catch(InvalidPositionException &e)
 330         {
 331                 in_water_stable = false;
 332         }
 333
 334         /*
 335                 Collision uncertainty radius
 336                 Make it a bit larger than the maximum distance of movement
 337         */
 338         //f32 d = pos_max_d * 1.1;
 339         // A fairly large value in here makes moving much smoother
 340         f32 d = 0.15*BS;
 341
 342         // This should always apply, otherwise there are glitches
 343         assert(d > pos_max_d);
 344
 345         float player_radius = BS*0.35;
 346         float player_height = BS*1.7;
 347
 348         // Maximum distance over border for sneaking
 349         f32 sneak_max = BS*0.4;
 350
 351         /*
 352                 If sneaking, player has larger collision radius to keep from
 353                 falling
 354         */
 355         /*if(control.sneak)
 356                 player_radius = sneak_max + d*1.1;*/
 357
 358         /*
 359                 If sneaking, keep in range from the last walked node and don't
 360                 fall off from it
 361         */
 362         if(control.sneak)
 363         {
 364                 f32 maxd = 0.5*BS + sneak_max;
 365                 v3f lwn_f = intToFloat(m_last_walked_node);
 366                 position.X = rangelim(position.X, lwn_f.X-maxd, lwn_f.X+maxd);
 367                 position.Z = rangelim(position.Z, lwn_f.Z-maxd, lwn_f.Z+maxd);
 368
 369                 f32 min_y = lwn_f.Y + 0.5*BS;
 370                 if(position.Y < min_y)
 371                 {
 372                         position.Y = min_y;
 373                         if(m_speed.Y < 0)
 374                                 m_speed.Y = 0;
 375                 }
 376         }
 377
 378         /*
 379                 Calculate player collision box (new and old)
 380         */
 381         core::aabbox3d<f32> playerbox(
 382                 position.X - player_radius,
 383                 position.Y - 0.0,
 384                 position.Z - player_radius,
 385                 position.X + player_radius,
 386                 position.Y + player_height,
 387                 position.Z + player_radius
 388         );
 389         core::aabbox3d<f32> playerbox_old(
 390                 oldpos.X - player_radius,
 391                 oldpos.Y - 0.0,
 392                 oldpos.Z - player_radius,
 393                 oldpos.X + player_radius,
 394                 oldpos.Y + player_height,
 395                 oldpos.Z + player_radius
 396         );
 397
 398         /*
 399                 If the player's feet touch the topside of any node, this is
 400                 set to true.
 401
 402                 Player is allowed to jump when this is true.
 403         */
 404         touching_ground = false;
 405
 406         /*std::cout<<"Checking collisions for ("
 407                         <<oldpos_i.X<<","<<oldpos_i.Y<<","<<oldpos_i.Z
 408                         <<") -> ("
 409                         <<pos_i.X<<","<<pos_i.Y<<","<<pos_i.Z
 410                         <<"):"<<std::endl;*/
 411
 412         /*
 413                 Go through every node around the player
 414         */
 415         for(s16 y = oldpos_i.Y - 1; y <= oldpos_i.Y + 2; y++)
 416         for(s16 z = oldpos_i.Z - 1; z <= oldpos_i.Z + 1; z++)
 417         for(s16 x = oldpos_i.X - 1; x <= oldpos_i.X + 1; x++)
 418         {
 419                 try{
 420                         if(content_walkable(map.getNode(v3s16(x,y,z)).d) == false){
 421                                 continue;
 422                         }
 423                 }
 424                 catch(InvalidPositionException &e)
 425                 {
 426                         // Doing nothing here will block the player from
 427                         // walking over map borders
 428                 }
 429
 430                 core::aabbox3d<f32> nodebox = Map::getNodeBox(
 431                                 v3s16(x,y,z));
 432
 433                 /*
 434                         See if the player is touching ground.
 435
 436                         Player touches ground if player's minimum Y is near node's
 437                         maximum Y and player's X-Z-area overlaps with the node's
 438                         X-Z-area.
 439
 440                         Use 0.15*BS so that it is easier to get on a node.
 441                 */
 442                 if(
 443                                 //fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < d
 444                                 fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < 0.15*BS
 445                                 && nodebox.MaxEdge.X-d > playerbox.MinEdge.X
 446                                 && nodebox.MinEdge.X+d < playerbox.MaxEdge.X
 447                                 && nodebox.MaxEdge.Z-d > playerbox.MinEdge.Z
 448                                 && nodebox.MinEdge.Z+d < playerbox.MaxEdge.Z
 449                 ){
 450                         touching_ground = true;
 451                 }
 452
 453                 // If player doesn't intersect with node, ignore node.
 454                 if(playerbox.intersectsWithBox(nodebox) == false)
 455                         continue;
 456
 457                 /*
 458                         Go through every axis
 459                 */
 460                 v3f dirs[3] = {
 461                         v3f(0,0,1), // back-front
 462                         v3f(0,1,0), // top-bottom
 463                         v3f(1,0,0), // right-left
 464                 };
 465                 for(u16 i=0; i<3; i++)
 466                 {
 467                         /*
 468                                 Calculate values along the axis
 469                         */
 470                         f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[i]);
 471                         f32 nodemin = nodebox.MinEdge.dotProduct(dirs[i]);
 472                         f32 playermax = playerbox.MaxEdge.dotProduct(dirs[i]);
 473                         f32 playermin = playerbox.MinEdge.dotProduct(dirs[i]);
 474                         f32 playermax_old = playerbox_old.MaxEdge.dotProduct(dirs[i]);
 475                         f32 playermin_old = playerbox_old.MinEdge.dotProduct(dirs[i]);
 476
 477                         /*
 478                                 Check collision for the axis.
 479                                 Collision happens when player is going through a surface.
 480                         */
 481                         /*f32 neg_d = d;
 482                         f32 pos_d = d;
 483                         // Make it easier to get on top of a node
 484                         if(i == 1)
 485                                 neg_d = 0.15*BS;
 486                         bool negative_axis_collides =
 487                                 (nodemax > playermin && nodemax <= playermin_old + neg_d
 488                                         && m_speed.dotProduct(dirs[i]) < 0);
 489                         bool positive_axis_collides =
 490                                 (nodemin < playermax && nodemin >= playermax_old - pos_d
 491                                         && m_speed.dotProduct(dirs[i]) > 0);*/
 492                         bool negative_axis_collides =
 493                                 (nodemax > playermin && nodemax <= playermin_old + d
 494                                         && m_speed.dotProduct(dirs[i]) < 0);
 495                         bool positive_axis_collides =
 496                                 (nodemin < playermax && nodemin >= playermax_old - d
 497                                         && m_speed.dotProduct(dirs[i]) > 0);
 498                         bool main_axis_collides =
 499                                         negative_axis_collides || positive_axis_collides;
 500
 501                         /*
 502                                 Check overlap of player and node in other axes
 503                         */
 504                         bool other_axes_overlap = true;
 505                         for(u16 j=0; j<3; j++)
 506                         {
 507                                 if(j == i)
 508                                         continue;
 509                                 f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[j]);
 510                                 f32 nodemin = nodebox.MinEdge.dotProduct(dirs[j]);
 511                                 f32 playermax = playerbox.MaxEdge.dotProduct(dirs[j]);
 512                                 f32 playermin = playerbox.MinEdge.dotProduct(dirs[j]);
 513                                 if(!(nodemax - d > playermin && nodemin + d < playermax))
 514                                 {
 515                                         other_axes_overlap = false;
 516                                         break;
 517                                 }
 518                         }
 519
 520                         /*
 521                                 If this is a collision, revert the position in the main
 522                                 direction.
 523                         */
 524                         if(other_axes_overlap && main_axis_collides)
 525                         {
 526                                 m_speed -= m_speed.dotProduct(dirs[i]) * dirs[i];
 527                                 position -= position.dotProduct(dirs[i]) * dirs[i];
 528                                 position += oldpos.dotProduct(dirs[i]) * dirs[i];
 529                         }
 530
 531                 }
 532         } // xyz
 533
 534         /*
 535                 If there is a walkable node directly under the player, save
 536                 the position of it.
 537         */
 538         try{
 539                 v3s16 pos_i_bottom = floatToInt(position - v3f(0,BS/2,0));
 540                 if(content_walkable(map.getNode(pos_i_bottom).d))
 541                 {
 542                         m_last_walked_node = pos_i_bottom;
 543                 }
 544         }
 545         catch(InvalidPositionException &e)
 546         {
 547         }
 548
 549         /*
 550                 Check the neighbors of m_last_walked_node that are closer to
 551                 the player. If walkable, set m_last_walked_node to such.
 552         */
 553         {
 554                 v3s16 pos_i_bottom = floatToInt(position - v3f(0,BS/2,0));
 555                 v3f lastwalkednode_pf = intToFloat(m_last_walked_node);
 556                 v2f lastwalkednode_p2df(lastwalkednode_pf.X, lastwalkednode_pf.Z);
 557                 v2f player_p2df(position.X, position.Z);
 558                 f32 min_distance_f = player_p2df.getDistanceFrom(lastwalkednode_p2df);
 559                 v3s16 new_last_walked_node = m_last_walked_node;
 560                 for(s16 x=-1; x<=1; x++)
 561                 for(s16 z=-1; z<=1; z++)
 562                 {
 563                         v3s16 p = m_last_walked_node + v3s16(x,0,z);
 564                         v3f pf = intToFloat(p);
 565                         v2f node_p2df(pf.X, pf.Z);
 566                         f32 distance_f = player_p2df.getDistanceFrom(node_p2df);
 567                         if(distance_f > min_distance_f)
 568                                 continue;
 569                         try{
 570                                 if(content_walkable(map.getNode(p).d) == false)
 571                                         continue;
 572                         }
 573                         catch(InvalidPositionException &e)
 574                         {
 575                                 continue;
 576                         }
 577
 578                         min_distance_f = distance_f;
 579                         new_last_walked_node = p;
 580                 }
 581
 582                 m_last_walked_node = new_last_walked_node;
 583         }
 584
 585         /*
 586                 Set new position
 587         */
 588         setPosition(position);
 589 }
 590
 591 void LocalPlayer::applyControl(float dtime)
 592 {
 593         // Clear stuff
 594         swimming_up = false;
 595
 596         // Random constants
 597         f32 walk_acceleration = 4.0 * BS;
 598         f32 walkspeed_max = 4.0 * BS;
 599
 600         setPitch(control.pitch);
 601         setYaw(control.yaw);
 602
 603         v3f move_direction = v3f(0,0,1);
 604         move_direction.rotateXZBy(getYaw());
 605
 606         v3f speed = v3f(0,0,0);
 607
 608         bool free_move = g_settings.getBool("free_move");
 609         bool fast_move = g_settings.getBool("fast_move");
 610         bool continuous_forward = g_settings.getBool("continuous_forward");
 611
 612         if(free_move)
 613         {
 614                 v3f speed = getSpeed();
 615                 speed.Y = 0;
 616                 setSpeed(speed);
 617         }
 618
 619         // Whether superspeed mode is used or not
 620         bool superspeed = false;
 621
 622         // If free movement and fast movement, always move fast
 623         if(free_move && fast_move)
 624                 superspeed = true;
 625
 626         // Auxiliary button 1 (E)
 627         if(control.aux1)
 628         {
 629                 if(free_move)
 630                 {
 631                         // In free movement mode, aux1 descends
 632                         v3f speed = getSpeed();
 633                         if(fast_move)
 634                                 speed.Y = -20*BS;
 635                         else
 636                                 speed.Y = -walkspeed_max;
 637                         setSpeed(speed);
 638                 }
 639                 else
 640                 {
 641                         // If not free movement but fast is allowed, aux1 is
 642                         // "Turbo button"
 643                         if(fast_move)
 644                                 superspeed = true;
 645                 }
 646         }
 647
 648         if(continuous_forward)
 649                 speed += move_direction;
 650
 651         if(control.up)
 652         {
 653                 if(continuous_forward)
 654                         superspeed = true;
 655                 else
 656                         speed += move_direction;
 657         }
 658         if(control.down)
 659         {
 660                 speed -= move_direction;
 661         }
 662         if(control.left)
 663         {
 664                 speed += move_direction.crossProduct(v3f(0,1,0));
 665         }
 666         if(control.right)
 667         {
 668                 speed += move_direction.crossProduct(v3f(0,-1,0));
 669         }
 670         if(control.jump)
 671         {
 672                 if(free_move)
 673                 {
 674                         v3f speed = getSpeed();
 675                         if(fast_move)
 676                                 speed.Y = 20*BS;
 677                         else
 678                                 speed.Y = walkspeed_max;
 679                         setSpeed(speed);
 680                 }
 681                 else if(touching_ground)
 682                 {
 683                         v3f speed = getSpeed();
 684                         /*
 685                                 NOTE: The d value in move() affects jump height by
 686                                 raising the height at which the jump speed is kept
 687                                 at its starting value
 688                         */
 689                         speed.Y = 6.5*BS;
 690                         setSpeed(speed);
 691                 }
 692                 // Use the oscillating value for getting out of water
 693                 // (so that the player doesn't fly on the surface)
 694                 else if(in_water)
 695                 {
 696                         v3f speed = getSpeed();
 697                         speed.Y = 1.5*BS;
 698                         setSpeed(speed);
 699                         swimming_up = true;
 700                 }
 701         }
 702
 703         // The speed of the player (Y is ignored)
 704         if(superspeed)
 705                 speed = speed.normalize() * walkspeed_max * 5.0;
 706         else if(control.sneak)
 707                 speed = speed.normalize() * walkspeed_max / 3.0;
 708         else
 709                 speed = speed.normalize() * walkspeed_max;
 710
 711         f32 inc = walk_acceleration * BS * dtime;
 712
 713         // Faster acceleration if fast and free movement
 714         if(free_move && fast_move)
 715                 inc = walk_acceleration * BS * dtime * 10;
 716
 717         // Accelerate to target speed with maximum increment
 718         accelerate(speed, inc);
 719 }
 720 #endif
 721