src/player.cpp

   1 /*
   2 Minetest-c55
   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
  26
  27 Player::Player():
  28         touching_ground(false),
  29         in_water(false),
  30         in_water_stable(false),
  31         swimming_up(false),
  32         inventory_backup(NULL),
  33         craftresult_is_preview(true),
  34         hp(20),
  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         delete inventory_backup;
  48 }
  49
  50 void Player::resetInventory()
  51 {
  52         inventory.clear();
  53         inventory.addList("main", PLAYER_INVENTORY_SIZE);
  54         inventory.addList("craft", 9);
  55         inventory.addList("craftresult", 1);
  56 }
  57
  58 // Y direction is ignored
  59 void Player::accelerate(v3f target_speed, f32 max_increase)
  60 {
  61         v3f d_wanted = target_speed - m_speed;
  62         d_wanted.Y = 0;
  63         f32 dl_wanted = d_wanted.getLength();
  64         f32 dl = dl_wanted;
  65         if(dl > max_increase)
  66                 dl = max_increase;
  67
  68         v3f d = d_wanted.normalize() * dl;
  69
  70         m_speed.X += d.X;
  71         m_speed.Z += d.Z;
  72         //m_speed += d;
  73
  74 #if 0 // old code
  75         if(m_speed.X < target_speed.X - max_increase)
  76                 m_speed.X += max_increase;
  77         else if(m_speed.X > target_speed.X + max_increase)
  78                 m_speed.X -= max_increase;
  79         else if(m_speed.X < target_speed.X)
  80                 m_speed.X = target_speed.X;
  81         else if(m_speed.X > target_speed.X)
  82                 m_speed.X = target_speed.X;
  83
  84         if(m_speed.Z < target_speed.Z - max_increase)
  85                 m_speed.Z += max_increase;
  86         else if(m_speed.Z > target_speed.Z + max_increase)
  87                 m_speed.Z -= max_increase;
  88         else if(m_speed.Z < target_speed.Z)
  89                 m_speed.Z = target_speed.Z;
  90         else if(m_speed.Z > target_speed.Z)
  91                 m_speed.Z = target_speed.Z;
  92 #endif
  93 }
  94
  95 void Player::serialize(std::ostream &os)
  96 {
  97         // Utilize a Settings object for storing values
  98         Settings args;
  99         args.setS32("version", 1);
 100         args.set("name", m_name);
 101         //args.set("password", m_password);
 102         args.setFloat("pitch", m_pitch);
 103         args.setFloat("yaw", m_yaw);
 104         args.setV3F("position", m_position);
 105         args.setBool("craftresult_is_preview", craftresult_is_preview);
 106         args.setS32("hp", hp);
 107
 108         args.writeLines(os);
 109
 110         os<<"PlayerArgsEnd\n";
 111
 112         // If actual inventory is backed up due to creative mode, save it
 113         // instead of the dummy creative mode inventory
 114         if(inventory_backup)
 115                 inventory_backup->serialize(os);
 116         else
 117                 inventory.serialize(os);
 118 }
 119
 120 void Player::deSerialize(std::istream &is)
 121 {
 122         Settings args;
 123
 124         for(;;)
 125         {
 126                 if(is.eof())
 127                         throw SerializationError
 128                                         ("Player::deSerialize(): PlayerArgsEnd not found");
 129                 std::string line;
 130                 std::getline(is, line);
 131                 std::string trimmedline = trim(line);
 132                 if(trimmedline == "PlayerArgsEnd")
 133                         break;
 134                 args.parseConfigLine(line);
 135         }
 136
 137         //args.getS32("version");
 138         std::string name = args.get("name");
 139         updateName(name.c_str());
 140         /*std::string password = "";
 141         if(args.exists("password"))
 142                 password = args.get("password");
 143         updatePassword(password.c_str());*/
 144         m_pitch = args.getFloat("pitch");
 145         m_yaw = args.getFloat("yaw");
 146         m_position = args.getV3F("position");
 147         try{
 148                 craftresult_is_preview = args.getBool("craftresult_is_preview");
 149         }catch(SettingNotFoundException &e){
 150                 craftresult_is_preview = true;
 151         }
 152         try{
 153                 hp = args.getS32("hp");
 154         }catch(SettingNotFoundException &e){
 155                 hp = 20;
 156         }
 157         /*try{
 158                 std::string sprivs = args.get("privs");
 159                 if(sprivs == "all")
 160                 {
 161                         privs = PRIV_ALL;
 162                 }
 163                 else
 164                 {
 165                         std::istringstream ss(sprivs);
 166                         ss>>privs;
 167                 }
 168         }catch(SettingNotFoundException &e){
 169                 privs = PRIV_DEFAULT;
 170         }*/
 171
 172         inventory.deSerialize(is);
 173 }
 174
 175 /*
 176         RemotePlayer
 177 */
 178
 179 #ifndef SERVER
 180
 181 RemotePlayer::RemotePlayer(
 182                 scene::ISceneNode* parent,
 183                 IrrlichtDevice *device,
 184                 s32 id):
 185         scene::ISceneNode(parent, (device==NULL)?NULL:device->getSceneManager(), id),
 186         m_text(NULL)
 187 {
 188         m_box = core::aabbox3d<f32>(-BS/2,0,-BS/2,BS/2,BS*2,BS/2);
 189
 190         if(parent != NULL && device != NULL)
 191         {
 192                 // ISceneNode stores a member called SceneManager
 193                 scene::ISceneManager* mgr = SceneManager;
 194                 video::IVideoDriver* driver = mgr->getVideoDriver();
 195                 gui::IGUIEnvironment* gui = device->getGUIEnvironment();
 196
 197                 // Add a text node for showing the name
 198                 wchar_t wname[1] = {0};
 199                 m_text = mgr->addTextSceneNode(gui->getBuiltInFont(),
 200                                 wname, video::SColor(255,255,255,255), this);
 201                 m_text->setPosition(v3f(0, (f32)BS*2.1, 0));
 202
 203                 // Attach a simple mesh to the player for showing an image
 204                 scene::SMesh *mesh = new scene::SMesh();
 205                 { // Front
 206                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 207                 video::SColor c(255,255,255,255);
 208                 video::S3DVertex vertices[4] =
 209                 {
 210                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 211                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 212                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 213                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 214                 };
 215                 u16 indices[] = {0,1,2,2,3,0};
 216                 buf->append(vertices, 4, indices, 6);
 217                 // Set material
 218                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 219                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 220                 buf->getMaterial().setTexture(0, driver->getTexture(getTexturePath("player.png").c_str()));
 221                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 222                 buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
 223                 //buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 224                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 225                 // Add to mesh
 226                 mesh->addMeshBuffer(buf);
 227                 buf->drop();
 228                 }
 229                 { // Back
 230                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 231                 video::SColor c(255,255,255,255);
 232                 video::S3DVertex vertices[4] =
 233                 {
 234                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 235                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 236                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 237                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 238                 };
 239                 u16 indices[] = {0,1,2,2,3,0};
 240                 buf->append(vertices, 4, indices, 6);
 241                 // Set material
 242                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 243                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 244                 buf->getMaterial().setTexture(0, driver->getTexture(getTexturePath("player_back.png").c_str()));
 245                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 246                 buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
 247                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 248                 // Add to mesh
 249                 mesh->addMeshBuffer(buf);
 250                 buf->drop();
 251                 }
 252                 m_node = mgr->addMeshSceneNode(mesh, this);
 253                 mesh->drop();
 254                 m_node->setPosition(v3f(0,0,0));
 255         }
 256 }
 257
 258 RemotePlayer::~RemotePlayer()
 259 {
 260         if(SceneManager != NULL)
 261                 ISceneNode::remove();
 262 }
 263
 264 void RemotePlayer::updateName(const char *name)
 265 {
 266         Player::updateName(name);
 267         if(m_text != NULL)
 268         {
 269                 wchar_t wname[PLAYERNAME_SIZE];
 270                 mbstowcs(wname, m_name, strlen(m_name)+1);
 271                 m_text->setText(wname);
 272         }
 273 }
 274
 275 void RemotePlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 276 {
 277         m_pos_animation_time_counter += dtime;
 278         m_pos_animation_counter += dtime;
 279         v3f movevector = m_position - m_oldpos;
 280         f32 moveratio;
 281         if(m_pos_animation_time < 0.001)
 282                 moveratio = 1.0;
 283         else
 284                 moveratio = m_pos_animation_counter / m_pos_animation_time;
 285         if(moveratio > 1.5)
 286                 moveratio = 1.5;
 287         m_showpos = m_oldpos + movevector * moveratio;
 288
 289         ISceneNode::setPosition(m_showpos);
 290 }
 291
 292 #endif
 293
 294 #ifndef SERVER
 295 /*
 296         LocalPlayer
 297 */
 298
 299 LocalPlayer::LocalPlayer():
 300         m_sneak_node(32767,32767,32767),
 301         m_sneak_node_exists(false)
 302 {
 303         // Initialize hp to 0, so that no hearts will be shown if server
 304         // doesn't support health points
 305         hp = 0;
 306 }
 307
 308 LocalPlayer::~LocalPlayer()
 309 {
 310 }
 311
 312 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d,
 313                 core::list<CollisionInfo> *collision_info)
 314 {
 315         v3f position = getPosition();
 316         v3f oldpos = position;
 317         v3s16 oldpos_i = floatToInt(oldpos, BS);
 318
 319         v3f old_speed = m_speed;
 320
 321         /*std::cout<<"oldpos_i=("<<oldpos_i.X<<","<<oldpos_i.Y<<","
 322                         <<oldpos_i.Z<<")"<<std::endl;*/
 323
 324         /*
 325                 Calculate new position
 326         */
 327         position += m_speed * dtime;
 328
 329         // Skip collision detection if a special movement mode is used
 330         bool free_move = g_settings.getBool("free_move");
 331         if(free_move)
 332         {
 333                 setPosition(position);
 334                 return;
 335         }
 336
 337         /*
 338                 Collision detection
 339         */
 340
 341         // Player position in nodes
 342         v3s16 pos_i = floatToInt(position, BS);
 343
 344         /*
 345                 Check if player is in water (the oscillating value)
 346         */
 347         try{
 348                 // If in water, the threshold of coming out is at higher y
 349                 if(in_water)
 350                 {
 351                         v3s16 pp = floatToInt(position + v3f(0,BS*0.1,0), BS);
 352                         in_water = content_liquid(map.getNode(pp).getContent());
 353                 }
 354                 // If not in water, the threshold of going in is at lower y
 355                 else
 356                 {
 357                         v3s16 pp = floatToInt(position + v3f(0,BS*0.5,0), BS);
 358                         in_water = content_liquid(map.getNode(pp).getContent());
 359                 }
 360         }
 361         catch(InvalidPositionException &e)
 362         {
 363                 in_water = false;
 364         }
 365
 366         /*
 367                 Check if player is in water (the stable value)
 368         */
 369         try{
 370                 v3s16 pp = floatToInt(position + v3f(0,0,0), BS);
 371                 in_water_stable = content_liquid(map.getNode(pp).getContent());
 372         }
 373         catch(InvalidPositionException &e)
 374         {
 375                 in_water_stable = false;
 376         }
 377
 378         /*
 379                 Check if player is climbing
 380         */
 381
 382         try {
 383                 v3s16 pp = floatToInt(position + v3f(0,0.5*BS,0), BS);
 384                 v3s16 pp2 = floatToInt(position + v3f(0,-0.2*BS,0), BS);
 385                 is_climbing = (content_features(map.getNode(pp).getContent()).climbable ||
 386                                content_features(map.getNode(pp2).getContent()).climbable);
 387         }
 388         catch(InvalidPositionException &e)
 389         {
 390                 is_climbing = false;
 391         }
 392
 393         /*
 394                 Collision uncertainty radius
 395                 Make it a bit larger than the maximum distance of movement
 396         */
 397         //f32 d = pos_max_d * 1.1;
 398         // A fairly large value in here makes moving smoother
 399         f32 d = 0.15*BS;
 400
 401         // This should always apply, otherwise there are glitches
 402         assert(d > pos_max_d);
 403
 404         float player_radius = BS*0.35;
 405         float player_height = BS*1.7;
 406
 407         // Maximum distance over border for sneaking
 408         f32 sneak_max = BS*0.4;
 409
 410         /*
 411                 If sneaking, player has larger collision radius to keep from
 412                 falling
 413         */
 414         /*if(control.sneak)
 415                 player_radius = sneak_max + d*1.1;*/
 416
 417         /*
 418                 If sneaking, keep in range from the last walked node and don't
 419                 fall off from it
 420         */
 421         if(control.sneak && m_sneak_node_exists)
 422         {
 423                 f32 maxd = 0.5*BS + sneak_max;
 424                 v3f lwn_f = intToFloat(m_sneak_node, BS);
 425                 position.X = rangelim(position.X, lwn_f.X-maxd, lwn_f.X+maxd);
 426                 position.Z = rangelim(position.Z, lwn_f.Z-maxd, lwn_f.Z+maxd);
 427
 428                 f32 min_y = lwn_f.Y + 0.5*BS;
 429                 if(position.Y < min_y)
 430                 {
 431                         position.Y = min_y;
 432
 433                         //v3f old_speed = m_speed;
 434
 435                         if(m_speed.Y < 0)
 436                                 m_speed.Y = 0;
 437
 438                         /*if(collision_info)
 439                         {
 440                                 // Report fall collision
 441                                 if(old_speed.Y < m_speed.Y - 0.1)
 442                                 {
 443                                         CollisionInfo info;
 444                                         info.t = COLLISION_FALL;
 445                                         info.speed = m_speed.Y - old_speed.Y;
 446                                         collision_info->push_back(info);
 447                                 }
 448                         }*/
 449                 }
 450         }
 451
 452         /*
 453                 Calculate player collision box (new and old)
 454         */
 455         core::aabbox3d<f32> playerbox(
 456                 position.X - player_radius,
 457                 position.Y - 0.0,
 458                 position.Z - player_radius,
 459                 position.X + player_radius,
 460                 position.Y + player_height,
 461                 position.Z + player_radius
 462         );
 463         core::aabbox3d<f32> playerbox_old(
 464                 oldpos.X - player_radius,
 465                 oldpos.Y - 0.0,
 466                 oldpos.Z - player_radius,
 467                 oldpos.X + player_radius,
 468                 oldpos.Y + player_height,
 469                 oldpos.Z + player_radius
 470         );
 471
 472         /*
 473                 If the player's feet touch the topside of any node, this is
 474                 set to true.
 475
 476                 Player is allowed to jump when this is true.
 477         */
 478         touching_ground = false;
 479
 480         /*std::cout<<"Checking collisions for ("
 481                         <<oldpos_i.X<<","<<oldpos_i.Y<<","<<oldpos_i.Z
 482                         <<") -> ("
 483                         <<pos_i.X<<","<<pos_i.Y<<","<<pos_i.Z
 484                         <<"):"<<std::endl;*/
 485
 486         /*
 487                 Go through every node around the player
 488         */
 489         for(s16 y = oldpos_i.Y - 1; y <= oldpos_i.Y + 2; y++)
 490         for(s16 z = oldpos_i.Z - 1; z <= oldpos_i.Z + 1; z++)
 491         for(s16 x = oldpos_i.X - 1; x <= oldpos_i.X + 1; x++)
 492         {
 493                 try{
 494                         // Player collides into walkable nodes
 495                         if(content_walkable(map.getNode(v3s16(x,y,z)).getContent()) == false)
 496                                 continue;
 497                 }
 498                 catch(InvalidPositionException &e)
 499                 {
 500                         // Doing nothing here will block the player from
 501                         // walking over map borders
 502                 }
 503
 504                 core::aabbox3d<f32> nodebox = getNodeBox(v3s16(x,y,z), BS);
 505
 506                 /*
 507                         See if the player is touching ground.
 508
 509                         Player touches ground if player's minimum Y is near node's
 510                         maximum Y and player's X-Z-area overlaps with the node's
 511                         X-Z-area.
 512
 513                         Use 0.15*BS so that it is easier to get on a node.
 514                 */
 515                 if(
 516                                 //fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < d
 517                                 fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < 0.15*BS
 518                                 && nodebox.MaxEdge.X-d > playerbox.MinEdge.X
 519                                 && nodebox.MinEdge.X+d < playerbox.MaxEdge.X
 520                                 && nodebox.MaxEdge.Z-d > playerbox.MinEdge.Z
 521                                 && nodebox.MinEdge.Z+d < playerbox.MaxEdge.Z
 522                 ){
 523                         touching_ground = true;
 524                 }
 525
 526                 // If player doesn't intersect with node, ignore node.
 527                 if(playerbox.intersectsWithBox(nodebox) == false)
 528                         continue;
 529
 530                 /*
 531                         Go through every axis
 532                 */
 533                 v3f dirs[3] = {
 534                         v3f(0,0,1), // back-front
 535                         v3f(0,1,0), // top-bottom
 536                         v3f(1,0,0), // right-left
 537                 };
 538                 for(u16 i=0; i<3; i++)
 539                 {
 540                         /*
 541                                 Calculate values along the axis
 542                         */
 543                         f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[i]);
 544                         f32 nodemin = nodebox.MinEdge.dotProduct(dirs[i]);
 545                         f32 playermax = playerbox.MaxEdge.dotProduct(dirs[i]);
 546                         f32 playermin = playerbox.MinEdge.dotProduct(dirs[i]);
 547                         f32 playermax_old = playerbox_old.MaxEdge.dotProduct(dirs[i]);
 548                         f32 playermin_old = playerbox_old.MinEdge.dotProduct(dirs[i]);
 549
 550                         /*
 551                                 Check collision for the axis.
 552                                 Collision happens when player is going through a surface.
 553                         */
 554                         /*f32 neg_d = d;
 555                         f32 pos_d = d;
 556                         // Make it easier to get on top of a node
 557                         if(i == 1)
 558                                 neg_d = 0.15*BS;
 559                         bool negative_axis_collides =
 560                                 (nodemax > playermin && nodemax <= playermin_old + neg_d
 561                                         && m_speed.dotProduct(dirs[i]) < 0);
 562                         bool positive_axis_collides =
 563                                 (nodemin < playermax && nodemin >= playermax_old - pos_d
 564                                         && m_speed.dotProduct(dirs[i]) > 0);*/
 565                         bool negative_axis_collides =
 566                                 (nodemax > playermin && nodemax <= playermin_old + d
 567                                         && m_speed.dotProduct(dirs[i]) < 0);
 568                         bool positive_axis_collides =
 569                                 (nodemin < playermax && nodemin >= playermax_old - d
 570                                         && m_speed.dotProduct(dirs[i]) > 0);
 571                         bool main_axis_collides =
 572                                         negative_axis_collides || positive_axis_collides;
 573
 574                         /*
 575                                 Check overlap of player and node in other axes
 576                         */
 577                         bool other_axes_overlap = true;
 578                         for(u16 j=0; j<3; j++)
 579                         {
 580                                 if(j == i)
 581                                         continue;
 582                                 f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[j]);
 583                                 f32 nodemin = nodebox.MinEdge.dotProduct(dirs[j]);
 584                                 f32 playermax = playerbox.MaxEdge.dotProduct(dirs[j]);
 585                                 f32 playermin = playerbox.MinEdge.dotProduct(dirs[j]);
 586                                 if(!(nodemax - d > playermin && nodemin + d < playermax))
 587                                 {
 588                                         other_axes_overlap = false;
 589                                         break;
 590                                 }
 591                         }
 592
 593                         /*
 594                                 If this is a collision, revert the position in the main
 595                                 direction.
 596                         */
 597                         if(other_axes_overlap && main_axis_collides)
 598                         {
 599                                 //v3f old_speed = m_speed;
 600
 601                                 m_speed -= m_speed.dotProduct(dirs[i]) * dirs[i];
 602                                 position -= position.dotProduct(dirs[i]) * dirs[i];
 603                                 position += oldpos.dotProduct(dirs[i]) * dirs[i];
 604
 605                                 /*if(collision_info)
 606                                 {
 607                                         // Report fall collision
 608                                         if(old_speed.Y < m_speed.Y - 0.1)
 609                                         {
 610                                                 CollisionInfo info;
 611                                                 info.t = COLLISION_FALL;
 612                                                 info.speed = m_speed.Y - old_speed.Y;
 613                                                 collision_info->push_back(info);
 614                                         }
 615                                 }*/
 616                         }
 617
 618                 }
 619         } // xyz
 620
 621         /*
 622                 Check the nodes under the player to see from which node the
 623                 player is sneaking from, if any.
 624         */
 625         {
 626                 v3s16 pos_i_bottom = floatToInt(position - v3f(0,BS/2,0), BS);
 627                 v2f player_p2df(position.X, position.Z);
 628                 f32 min_distance_f = 100000.0*BS;
 629                 // If already seeking from some node, compare to it.
 630                 /*if(m_sneak_node_exists)
 631                 {
 632                         v3f sneaknode_pf = intToFloat(m_sneak_node, BS);
 633                         v2f sneaknode_p2df(sneaknode_pf.X, sneaknode_pf.Z);
 634                         f32 d_horiz_f = player_p2df.getDistanceFrom(sneaknode_p2df);
 635                         f32 d_vert_f = fabs(sneaknode_pf.Y + BS*0.5 - position.Y);
 636                         // Ignore if player is not on the same level (likely dropped)
 637                         if(d_vert_f < 0.15*BS)
 638                                 min_distance_f = d_horiz_f;
 639                 }*/
 640                 v3s16 new_sneak_node = m_sneak_node;
 641                 for(s16 x=-1; x<=1; x++)
 642                 for(s16 z=-1; z<=1; z++)
 643                 {
 644                         v3s16 p = pos_i_bottom + v3s16(x,0,z);
 645                         v3f pf = intToFloat(p, BS);
 646                         v2f node_p2df(pf.X, pf.Z);
 647                         f32 distance_f = player_p2df.getDistanceFrom(node_p2df);
 648                         f32 max_axis_distance_f = MYMAX(
 649                                         fabs(player_p2df.X-node_p2df.X),
 650                                         fabs(player_p2df.Y-node_p2df.Y));
 651
 652                         if(distance_f > min_distance_f ||
 653                                         max_axis_distance_f > 0.5*BS + sneak_max + 0.1*BS)
 654                                 continue;
 655
 656                         try{
 657                                 // The node to be sneaked on has to be walkable
 658                                 if(content_walkable(map.getNode(p).getContent()) == false)
 659                                         continue;
 660                                 // And the node above it has to be nonwalkable
 661                                 if(content_walkable(map.getNode(p+v3s16(0,1,0)).getContent()) == true)
 662                                         continue;
 663                         }
 664                         catch(InvalidPositionException &e)
 665                         {
 666                                 continue;
 667                         }
 668
 669                         min_distance_f = distance_f;
 670                         new_sneak_node = p;
 671                 }
 672
 673                 bool sneak_node_found = (min_distance_f < 100000.0*BS*0.9);
 674
 675                 if(control.sneak && m_sneak_node_exists)
 676                 {
 677                         if(sneak_node_found)
 678                                 m_sneak_node = new_sneak_node;
 679                 }
 680                 else
 681                 {
 682                         m_sneak_node = new_sneak_node;
 683                         m_sneak_node_exists = sneak_node_found;
 684                 }
 685
 686                 /*
 687                         If sneaking, the player's collision box can be in air, so
 688                         this has to be set explicitly
 689                 */
 690                 if(sneak_node_found && control.sneak)
 691                         touching_ground = true;
 692         }
 693
 694         /*
 695                 Set new position
 696         */
 697         setPosition(position);
 698
 699         /*
 700                 Report collisions
 701         */
 702         if(collision_info)
 703         {
 704                 // Report fall collision
 705                 if(old_speed.Y < m_speed.Y - 0.1)
 706                 {
 707                         CollisionInfo info;
 708                         info.t = COLLISION_FALL;
 709                         info.speed = m_speed.Y - old_speed.Y;
 710                         collision_info->push_back(info);
 711                 }
 712         }
 713 }
 714
 715 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 716 {
 717         move(dtime, map, pos_max_d, NULL);
 718 }
 719
 720 void LocalPlayer::applyControl(float dtime)
 721 {
 722         // Clear stuff
 723         swimming_up = false;
 724
 725         // Random constants
 726         f32 walk_acceleration = 4.0 * BS;
 727         f32 walkspeed_max = 4.0 * BS;
 728
 729         setPitch(control.pitch);
 730         setYaw(control.yaw);
 731
 732         v3f move_direction = v3f(0,0,1);
 733         move_direction.rotateXZBy(getYaw());
 734
 735         v3f speed = v3f(0,0,0);
 736
 737         bool free_move = g_settings.getBool("free_move");
 738         bool fast_move = g_settings.getBool("fast_move");
 739         bool continuous_forward = g_settings.getBool("continuous_forward");
 740
 741         if(free_move)
 742         {
 743                 v3f speed = getSpeed();
 744                 speed.Y = 0;
 745                 setSpeed(speed);
 746         }
 747
 748         // Whether superspeed mode is used or not
 749         bool superspeed = false;
 750
 751         // If free movement and fast movement, always move fast
 752         if(free_move && fast_move)
 753                 superspeed = true;
 754
 755         // Auxiliary button 1 (E)
 756         if(control.aux1)
 757         {
 758                 if(free_move)
 759                 {
 760                         // In free movement mode, aux1 descends
 761                         v3f speed = getSpeed();
 762                         if(fast_move)
 763                                 speed.Y = -20*BS;
 764                         else
 765                                 speed.Y = -walkspeed_max;
 766                         setSpeed(speed);
 767                 }
 768                 else
 769                 {
 770                         // If not free movement but fast is allowed, aux1 is
 771                         // "Turbo button"
 772                         if(fast_move)
 773                                 superspeed = true;
 774                 }
 775         }
 776
 777         if(continuous_forward)
 778                 speed += move_direction;
 779
 780         if(control.up)
 781         {
 782                 if(continuous_forward)
 783                         superspeed = true;
 784                 else
 785                         speed += move_direction;
 786         }
 787         if(control.down)
 788         {
 789                 speed -= move_direction;
 790         }
 791         if(control.left)
 792         {
 793                 speed += move_direction.crossProduct(v3f(0,1,0));
 794         }
 795         if(control.right)
 796         {
 797                 speed += move_direction.crossProduct(v3f(0,-1,0));
 798         }
 799         if(control.jump)
 800         {
 801                 if(free_move)
 802                 {
 803                         v3f speed = getSpeed();
 804                         if(fast_move)
 805                                 speed.Y = 20*BS;
 806                         else
 807                                 speed.Y = walkspeed_max;
 808                         setSpeed(speed);
 809                 }
 810                 else if(touching_ground)
 811                 {
 812                         v3f speed = getSpeed();
 813                         /*
 814                                 NOTE: The d value in move() affects jump height by
 815                                 raising the height at which the jump speed is kept
 816                                 at its starting value
 817                         */
 818                         speed.Y = 6.5*BS;
 819                         setSpeed(speed);
 820                 }
 821                 // Use the oscillating value for getting out of water
 822                 // (so that the player doesn't fly on the surface)
 823                 else if(in_water)
 824                 {
 825                         v3f speed = getSpeed();
 826                         speed.Y = 1.5*BS;
 827                         setSpeed(speed);
 828                         swimming_up = true;
 829                 }
 830         }
 831
 832         if (is_climbing) {
 833                 if (control.up || control.left || control.right || control.down) {
 834                         v3f speed = getSpeed();
 835                         speed.Y = 2.5*BS;
 836                         setSpeed(speed);
 837                 }
 838                 else {
 839                         v3f speed = getSpeed();
 840                         speed.Y = -2*BS;
 841                         setSpeed(speed);
 842                 }
 843         }
 844
 845         // The speed of the player (Y is ignored)
 846         if(superspeed)
 847                 speed = speed.normalize() * walkspeed_max * 5.0;
 848         else if(control.sneak)
 849                 speed = speed.normalize() * walkspeed_max / 3.0;
 850         else
 851                 speed = speed.normalize() * walkspeed_max;
 852
 853         f32 inc = walk_acceleration * BS * dtime;
 854
 855         // Faster acceleration if fast and free movement
 856         if(free_move && fast_move)
 857                 inc = walk_acceleration * BS * dtime * 10;
 858
 859         // Accelerate to target speed with maximum increment
 860         accelerate(speed, inc);
 861 }
 862 #endif
 863