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 // Convert a privileges value into a human-readable string,
  27 // with each component separated by a comma.
  28 std::wstring privsToString(u64 privs)
  29 {
  30         std::wostringstream os(std::ios_base::binary);
  31         if(privs & PRIV_BUILD)
  32                 os<<L"build,";
  33         if(privs & PRIV_TELEPORT)
  34                 os<<L"teleport,";
  35         if(privs & PRIV_SETTIME)
  36                 os<<L"settime,";
  37         if(privs & PRIV_PRIVS)
  38                 os<<L"privs,";
  39         if(os.tellp())
  40         {
  41                 // Drop the trailing comma. (Why on earth can't
  42                 // you truncate a C++ stream anyway???)
  43                 std::wstring tmp = os.str();
  44                 return tmp.substr(0, tmp.length() -1);
  45         }
  46         return os.str();
  47 }
  48
  49 // Converts a comma-seperated list of privilege values into a
  50 // privileges value. The reverse of privsToString(). Returns
  51 // PRIV_INVALID if there is anything wrong with the input.
  52 u64 stringToPrivs(std::wstring str)
  53 {
  54         u64 privs=0;
  55         std::vector<std::wstring> pr;
  56         pr=str_split(str, ',');
  57         for(std::vector<std::wstring>::iterator i = pr.begin();
  58                 i != pr.end(); ++i)
  59         {
  60                 if(*i == L"build")
  61                         privs |= PRIV_BUILD;
  62                 else if(*i == L"teleport")
  63                         privs |= PRIV_TELEPORT;
  64                 else if(*i == L"settime")
  65                         privs |= PRIV_SETTIME;
  66                 else if(*i == L"privs")
  67                         privs |= PRIV_PRIVS;
  68                 else
  69                         return PRIV_INVALID;
  70         }
  71         return privs;
  72 }
  73
  74
  75 Player::Player():
  76         touching_ground(false),
  77         in_water(false),
  78         in_water_stable(false),
  79         swimming_up(false),
  80         craftresult_is_preview(true),
  81         hp(20),
  82         peer_id(PEER_ID_INEXISTENT),
  83         m_pitch(0),
  84         m_yaw(0),
  85         m_speed(0,0,0),
  86         m_position(0,0,0),
  87         privs(PRIV_DEFAULT)
  88 {
  89         updateName("<not set>");
  90         resetInventory();
  91 }
  92
  93 Player::~Player()
  94 {
  95 }
  96
  97 void Player::resetInventory()
  98 {
  99         inventory.clear();
 100         inventory.addList("main", PLAYER_INVENTORY_SIZE);
 101         inventory.addList("craft", 9);
 102         inventory.addList("craftresult", 1);
 103 }
 104
 105 // Y direction is ignored
 106 void Player::accelerate(v3f target_speed, f32 max_increase)
 107 {
 108         v3f d_wanted = target_speed - m_speed;
 109         d_wanted.Y = 0;
 110         f32 dl_wanted = d_wanted.getLength();
 111         f32 dl = dl_wanted;
 112         if(dl > max_increase)
 113                 dl = max_increase;
 114
 115         v3f d = d_wanted.normalize() * dl;
 116
 117         m_speed.X += d.X;
 118         m_speed.Z += d.Z;
 119         //m_speed += d;
 120
 121 #if 0 // old code
 122         if(m_speed.X < target_speed.X - max_increase)
 123                 m_speed.X += max_increase;
 124         else if(m_speed.X > target_speed.X + max_increase)
 125                 m_speed.X -= max_increase;
 126         else if(m_speed.X < target_speed.X)
 127                 m_speed.X = target_speed.X;
 128         else if(m_speed.X > target_speed.X)
 129                 m_speed.X = target_speed.X;
 130
 131         if(m_speed.Z < target_speed.Z - max_increase)
 132                 m_speed.Z += max_increase;
 133         else if(m_speed.Z > target_speed.Z + max_increase)
 134                 m_speed.Z -= max_increase;
 135         else if(m_speed.Z < target_speed.Z)
 136                 m_speed.Z = target_speed.Z;
 137         else if(m_speed.Z > target_speed.Z)
 138                 m_speed.Z = target_speed.Z;
 139 #endif
 140 }
 141
 142 void Player::serialize(std::ostream &os)
 143 {
 144         // Utilize a Settings object for storing values
 145         Settings args;
 146         args.setS32("version", 1);
 147         args.set("name", m_name);
 148         args.setFloat("pitch", m_pitch);
 149         args.setFloat("yaw", m_yaw);
 150         args.setV3F("position", m_position);
 151         args.setBool("craftresult_is_preview", craftresult_is_preview);
 152         args.setS32("hp", hp);
 153         args.setU64("privs", privs);
 154
 155         args.writeLines(os);
 156
 157         os<<"PlayerArgsEnd\n";
 158
 159         inventory.serialize(os);
 160 }
 161
 162 void Player::deSerialize(std::istream &is)
 163 {
 164         Settings args;
 165
 166         for(;;)
 167         {
 168                 if(is.eof())
 169                         throw SerializationError
 170                                         ("Player::deSerialize(): PlayerArgsEnd not found");
 171                 std::string line;
 172                 std::getline(is, line);
 173                 std::string trimmedline = trim(line);
 174                 if(trimmedline == "PlayerArgsEnd")
 175                         break;
 176                 args.parseConfigLine(line);
 177         }
 178
 179         //args.getS32("version");
 180         std::string name = args.get("name");
 181         updateName(name.c_str());
 182         m_pitch = args.getFloat("pitch");
 183         m_yaw = args.getFloat("yaw");
 184         m_position = args.getV3F("position");
 185         try{
 186                 craftresult_is_preview = args.getBool("craftresult_is_preview");
 187         }catch(SettingNotFoundException &e){
 188                 craftresult_is_preview = true;
 189         }
 190         try{
 191                 hp = args.getS32("hp");
 192         }catch(SettingNotFoundException &e){
 193                 hp = 20;
 194         }
 195         try{
 196                 std::string sprivs = args.get("privs");
 197                 if(sprivs == "all")
 198                 {
 199                         privs = PRIV_ALL;
 200                 }
 201                 else
 202                 {
 203                         std::istringstream ss(sprivs);
 204                         ss>>privs;
 205                 }
 206         }catch(SettingNotFoundException &e){
 207                 privs = PRIV_DEFAULT;
 208         }
 209
 210         inventory.deSerialize(is);
 211 }
 212
 213 /*
 214         RemotePlayer
 215 */
 216
 217 #ifndef SERVER
 218
 219 RemotePlayer::RemotePlayer(
 220                 scene::ISceneNode* parent,
 221                 IrrlichtDevice *device,
 222                 s32 id):
 223         scene::ISceneNode(parent, (device==NULL)?NULL:device->getSceneManager(), id),
 224         m_text(NULL)
 225 {
 226         m_box = core::aabbox3d<f32>(-BS/2,0,-BS/2,BS/2,BS*2,BS/2);
 227
 228         if(parent != NULL && device != NULL)
 229         {
 230                 // ISceneNode stores a member called SceneManager
 231                 scene::ISceneManager* mgr = SceneManager;
 232                 video::IVideoDriver* driver = mgr->getVideoDriver();
 233                 gui::IGUIEnvironment* gui = device->getGUIEnvironment();
 234
 235                 // Add a text node for showing the name
 236                 wchar_t wname[1] = {0};
 237                 m_text = mgr->addTextSceneNode(gui->getBuiltInFont(),
 238                                 wname, video::SColor(255,255,255,255), this);
 239                 m_text->setPosition(v3f(0, (f32)BS*2.1, 0));
 240
 241                 // Attach a simple mesh to the player for showing an image
 242                 scene::SMesh *mesh = new scene::SMesh();
 243                 { // Front
 244                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 245                 video::SColor c(255,255,255,255);
 246                 video::S3DVertex vertices[4] =
 247                 {
 248                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 249                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 250                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 251                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 252                 };
 253                 u16 indices[] = {0,1,2,2,3,0};
 254                 buf->append(vertices, 4, indices, 6);
 255                 // Set material
 256                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 257                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 258                 buf->getMaterial().setTexture(0, driver->getTexture(porting::getDataPath("player.png").c_str()));
 259                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 260                 buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
 261                 //buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 262                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 263                 // Add to mesh
 264                 mesh->addMeshBuffer(buf);
 265                 buf->drop();
 266                 }
 267                 { // Back
 268                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 269                 video::SColor c(255,255,255,255);
 270                 video::S3DVertex vertices[4] =
 271                 {
 272                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 273                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 274                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 275                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 276                 };
 277                 u16 indices[] = {0,1,2,2,3,0};
 278                 buf->append(vertices, 4, indices, 6);
 279                 // Set material
 280                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 281                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 282                 buf->getMaterial().setTexture(0, driver->getTexture(porting::getDataPath("player_back.png").c_str()));
 283                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 284                 buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
 285                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 286                 // Add to mesh
 287                 mesh->addMeshBuffer(buf);
 288                 buf->drop();
 289                 }
 290                 m_node = mgr->addMeshSceneNode(mesh, this);
 291                 mesh->drop();
 292                 m_node->setPosition(v3f(0,0,0));
 293         }
 294 }
 295
 296 RemotePlayer::~RemotePlayer()
 297 {
 298         if(SceneManager != NULL)
 299                 ISceneNode::remove();
 300 }
 301
 302 void RemotePlayer::updateName(const char *name)
 303 {
 304         Player::updateName(name);
 305         if(m_text != NULL)
 306         {
 307                 wchar_t wname[PLAYERNAME_SIZE];
 308                 mbstowcs(wname, m_name, strlen(m_name)+1);
 309                 m_text->setText(wname);
 310         }
 311 }
 312
 313 void RemotePlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 314 {
 315         m_pos_animation_time_counter += dtime;
 316         m_pos_animation_counter += dtime;
 317         v3f movevector = m_position - m_oldpos;
 318         f32 moveratio;
 319         if(m_pos_animation_time < 0.001)
 320                 moveratio = 1.0;
 321         else
 322                 moveratio = m_pos_animation_counter / m_pos_animation_time;
 323         if(moveratio > 1.5)
 324                 moveratio = 1.5;
 325         m_showpos = m_oldpos + movevector * moveratio;
 326
 327         ISceneNode::setPosition(m_showpos);
 328 }
 329
 330 #endif
 331
 332 #ifndef SERVER
 333 /*
 334         LocalPlayer
 335 */
 336
 337 LocalPlayer::LocalPlayer():
 338         m_sneak_node(32767,32767,32767),
 339         m_sneak_node_exists(false)
 340 {
 341         // Initialize hp to 0, so that no hearts will be shown if server
 342         // doesn't support health points
 343         hp = 0;
 344 }
 345
 346 LocalPlayer::~LocalPlayer()
 347 {
 348 }
 349
 350 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d,
 351                 core::list<CollisionInfo> *collision_info)
 352 {
 353         v3f position = getPosition();
 354         v3f oldpos = position;
 355         v3s16 oldpos_i = floatToInt(oldpos, BS);
 356
 357         /*std::cout<<"oldpos_i=("<<oldpos_i.X<<","<<oldpos_i.Y<<","
 358                         <<oldpos_i.Z<<")"<<std::endl;*/
 359
 360         /*
 361                 Calculate new position
 362         */
 363         position += m_speed * dtime;
 364
 365         // Skip collision detection if a special movement mode is used
 366         bool free_move = g_settings.getBool("free_move");
 367         if(free_move)
 368         {
 369                 setPosition(position);
 370                 return;
 371         }
 372
 373         /*
 374                 Collision detection
 375         */
 376
 377         // Player position in nodes
 378         v3s16 pos_i = floatToInt(position, BS);
 379
 380         /*
 381                 Check if player is in water (the oscillating value)
 382         */
 383         try{
 384                 // If in water, the threshold of coming out is at higher y
 385                 if(in_water)
 386                 {
 387                         v3s16 pp = floatToInt(position + v3f(0,BS*0.1,0), BS);
 388                         in_water = content_liquid(map.getNode(pp).d);
 389                 }
 390                 // If not in water, the threshold of going in is at lower y
 391                 else
 392                 {
 393                         v3s16 pp = floatToInt(position + v3f(0,BS*0.5,0), BS);
 394                         in_water = content_liquid(map.getNode(pp).d);
 395                 }
 396         }
 397         catch(InvalidPositionException &e)
 398         {
 399                 in_water = false;
 400         }
 401
 402         /*
 403                 Check if player is in water (the stable value)
 404         */
 405         try{
 406                 v3s16 pp = floatToInt(position + v3f(0,0,0), BS);
 407                 in_water_stable = content_liquid(map.getNode(pp).d);
 408         }
 409         catch(InvalidPositionException &e)
 410         {
 411                 in_water_stable = false;
 412         }
 413
 414         /*
 415                 Collision uncertainty radius
 416                 Make it a bit larger than the maximum distance of movement
 417         */
 418         //f32 d = pos_max_d * 1.1;
 419         // A fairly large value in here makes moving smoother
 420         f32 d = 0.15*BS;
 421
 422         // This should always apply, otherwise there are glitches
 423         assert(d > pos_max_d);
 424
 425         float player_radius = BS*0.35;
 426         float player_height = BS*1.7;
 427
 428         // Maximum distance over border for sneaking
 429         f32 sneak_max = BS*0.4;
 430
 431         /*
 432                 If sneaking, player has larger collision radius to keep from
 433                 falling
 434         */
 435         /*if(control.sneak)
 436                 player_radius = sneak_max + d*1.1;*/
 437
 438         /*
 439                 If sneaking, keep in range from the last walked node and don't
 440                 fall off from it
 441         */
 442         if(control.sneak && m_sneak_node_exists)
 443         {
 444                 f32 maxd = 0.5*BS + sneak_max;
 445                 v3f lwn_f = intToFloat(m_sneak_node, BS);
 446                 position.X = rangelim(position.X, lwn_f.X-maxd, lwn_f.X+maxd);
 447                 position.Z = rangelim(position.Z, lwn_f.Z-maxd, lwn_f.Z+maxd);
 448
 449                 f32 min_y = lwn_f.Y + 0.5*BS;
 450                 if(position.Y < min_y)
 451                 {
 452                         position.Y = min_y;
 453                         if(m_speed.Y < 0)
 454                                 m_speed.Y = 0;
 455                 }
 456         }
 457
 458         /*
 459                 Calculate player collision box (new and old)
 460         */
 461         core::aabbox3d<f32> playerbox(
 462                 position.X - player_radius,
 463                 position.Y - 0.0,
 464                 position.Z - player_radius,
 465                 position.X + player_radius,
 466                 position.Y + player_height,
 467                 position.Z + player_radius
 468         );
 469         core::aabbox3d<f32> playerbox_old(
 470                 oldpos.X - player_radius,
 471                 oldpos.Y - 0.0,
 472                 oldpos.Z - player_radius,
 473                 oldpos.X + player_radius,
 474                 oldpos.Y + player_height,
 475                 oldpos.Z + player_radius
 476         );
 477
 478         /*
 479                 If the player's feet touch the topside of any node, this is
 480                 set to true.
 481
 482                 Player is allowed to jump when this is true.
 483         */
 484         touching_ground = false;
 485
 486         /*std::cout<<"Checking collisions for ("
 487                         <<oldpos_i.X<<","<<oldpos_i.Y<<","<<oldpos_i.Z
 488                         <<") -> ("
 489                         <<pos_i.X<<","<<pos_i.Y<<","<<pos_i.Z
 490                         <<"):"<<std::endl;*/
 491
 492         /*
 493                 Go through every node around the player
 494         */
 495         for(s16 y = oldpos_i.Y - 1; y <= oldpos_i.Y + 2; y++)
 496         for(s16 z = oldpos_i.Z - 1; z <= oldpos_i.Z + 1; z++)
 497         for(s16 x = oldpos_i.X - 1; x <= oldpos_i.X + 1; x++)
 498         {
 499                 try{
 500                         // Player collides into walkable nodes
 501                         if(content_walkable(map.getNode(v3s16(x,y,z)).d) == false)
 502                                 continue;
 503                 }
 504                 catch(InvalidPositionException &e)
 505                 {
 506                         // Doing nothing here will block the player from
 507                         // walking over map borders
 508                 }
 509
 510                 core::aabbox3d<f32> nodebox = getNodeBox(v3s16(x,y,z), BS);
 511
 512                 /*
 513                         See if the player is touching ground.
 514
 515                         Player touches ground if player's minimum Y is near node's
 516                         maximum Y and player's X-Z-area overlaps with the node's
 517                         X-Z-area.
 518
 519                         Use 0.15*BS so that it is easier to get on a node.
 520                 */
 521                 if(
 522                                 //fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < d
 523                                 fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < 0.15*BS
 524                                 && nodebox.MaxEdge.X-d > playerbox.MinEdge.X
 525                                 && nodebox.MinEdge.X+d < playerbox.MaxEdge.X
 526                                 && nodebox.MaxEdge.Z-d > playerbox.MinEdge.Z
 527                                 && nodebox.MinEdge.Z+d < playerbox.MaxEdge.Z
 528                 ){
 529                         touching_ground = true;
 530                 }
 531
 532                 // If player doesn't intersect with node, ignore node.
 533                 if(playerbox.intersectsWithBox(nodebox) == false)
 534                         continue;
 535
 536                 /*
 537                         Go through every axis
 538                 */
 539                 v3f dirs[3] = {
 540                         v3f(0,0,1), // back-front
 541                         v3f(0,1,0), // top-bottom
 542                         v3f(1,0,0), // right-left
 543                 };
 544                 for(u16 i=0; i<3; i++)
 545                 {
 546                         /*
 547                                 Calculate values along the axis
 548                         */
 549                         f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[i]);
 550                         f32 nodemin = nodebox.MinEdge.dotProduct(dirs[i]);
 551                         f32 playermax = playerbox.MaxEdge.dotProduct(dirs[i]);
 552                         f32 playermin = playerbox.MinEdge.dotProduct(dirs[i]);
 553                         f32 playermax_old = playerbox_old.MaxEdge.dotProduct(dirs[i]);
 554                         f32 playermin_old = playerbox_old.MinEdge.dotProduct(dirs[i]);
 555
 556                         /*
 557                                 Check collision for the axis.
 558                                 Collision happens when player is going through a surface.
 559                         */
 560                         /*f32 neg_d = d;
 561                         f32 pos_d = d;
 562                         // Make it easier to get on top of a node
 563                         if(i == 1)
 564                                 neg_d = 0.15*BS;
 565                         bool negative_axis_collides =
 566                                 (nodemax > playermin && nodemax <= playermin_old + neg_d
 567                                         && m_speed.dotProduct(dirs[i]) < 0);
 568                         bool positive_axis_collides =
 569                                 (nodemin < playermax && nodemin >= playermax_old - pos_d
 570                                         && m_speed.dotProduct(dirs[i]) > 0);*/
 571                         bool negative_axis_collides =
 572                                 (nodemax > playermin && nodemax <= playermin_old + d
 573                                         && m_speed.dotProduct(dirs[i]) < 0);
 574                         bool positive_axis_collides =
 575                                 (nodemin < playermax && nodemin >= playermax_old - d
 576                                         && m_speed.dotProduct(dirs[i]) > 0);
 577                         bool main_axis_collides =
 578                                         negative_axis_collides || positive_axis_collides;
 579
 580                         /*
 581                                 Check overlap of player and node in other axes
 582                         */
 583                         bool other_axes_overlap = true;
 584                         for(u16 j=0; j<3; j++)
 585                         {
 586                                 if(j == i)
 587                                         continue;
 588                                 f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[j]);
 589                                 f32 nodemin = nodebox.MinEdge.dotProduct(dirs[j]);
 590                                 f32 playermax = playerbox.MaxEdge.dotProduct(dirs[j]);
 591                                 f32 playermin = playerbox.MinEdge.dotProduct(dirs[j]);
 592                                 if(!(nodemax - d > playermin && nodemin + d < playermax))
 593                                 {
 594                                         other_axes_overlap = false;
 595                                         break;
 596                                 }
 597                         }
 598
 599                         /*
 600                                 If this is a collision, revert the position in the main
 601                                 direction.
 602                         */
 603                         if(other_axes_overlap && main_axis_collides)
 604                         {
 605                                 v3f old_speed = m_speed;
 606
 607                                 m_speed -= m_speed.dotProduct(dirs[i]) * dirs[i];
 608                                 position -= position.dotProduct(dirs[i]) * dirs[i];
 609                                 position += oldpos.dotProduct(dirs[i]) * dirs[i];
 610
 611                                 if(collision_info)
 612                                 {
 613                                         // Report fall collision
 614                                         if(old_speed.Y < m_speed.Y - 0.1)
 615                                         {
 616                                                 CollisionInfo info;
 617                                                 info.t = COLLISION_FALL;
 618                                                 info.speed = m_speed.Y - old_speed.Y;
 619                                                 collision_info->push_back(info);
 620                                         }
 621                                 }
 622                         }
 623
 624                 }
 625         } // xyz
 626
 627         /*
 628                 Check the nodes under the player to see from which node the
 629                 player is sneaking from, if any.
 630         */
 631         {
 632                 v3s16 pos_i_bottom = floatToInt(position - v3f(0,BS/2,0), BS);
 633                 v2f player_p2df(position.X, position.Z);
 634                 f32 min_distance_f = 100000.0*BS;
 635                 // If already seeking from some node, compare to it.
 636                 /*if(m_sneak_node_exists)
 637                 {
 638                         v3f sneaknode_pf = intToFloat(m_sneak_node, BS);
 639                         v2f sneaknode_p2df(sneaknode_pf.X, sneaknode_pf.Z);
 640                         f32 d_horiz_f = player_p2df.getDistanceFrom(sneaknode_p2df);
 641                         f32 d_vert_f = fabs(sneaknode_pf.Y + BS*0.5 - position.Y);
 642                         // Ignore if player is not on the same level (likely dropped)
 643                         if(d_vert_f < 0.15*BS)
 644                                 min_distance_f = d_horiz_f;
 645                 }*/
 646                 v3s16 new_sneak_node = m_sneak_node;
 647                 for(s16 x=-1; x<=1; x++)
 648                 for(s16 z=-1; z<=1; z++)
 649                 {
 650                         v3s16 p = pos_i_bottom + v3s16(x,0,z);
 651                         v3f pf = intToFloat(p, BS);
 652                         v2f node_p2df(pf.X, pf.Z);
 653                         f32 distance_f = player_p2df.getDistanceFrom(node_p2df);
 654                         f32 max_axis_distance_f = MYMAX(
 655                                         fabs(player_p2df.X-node_p2df.X),
 656                                         fabs(player_p2df.Y-node_p2df.Y));
 657
 658                         if(distance_f > min_distance_f ||
 659                                         max_axis_distance_f > 0.5*BS + sneak_max + 0.1*BS)
 660                                 continue;
 661
 662                         try{
 663                                 // The node to be sneaked on has to be walkable
 664                                 if(content_walkable(map.getNode(p).d) == false)
 665                                         continue;
 666                                 // And the node above it has to be nonwalkable
 667                                 if(content_walkable(map.getNode(p+v3s16(0,1,0)).d) == true)
 668                                         continue;
 669                         }
 670                         catch(InvalidPositionException &e)
 671                         {
 672                                 continue;
 673                         }
 674
 675                         min_distance_f = distance_f;
 676                         new_sneak_node = p;
 677                 }
 678
 679                 bool sneak_node_found = (min_distance_f < 100000.0*BS*0.9);
 680
 681                 if(control.sneak && m_sneak_node_exists)
 682                 {
 683                         if(sneak_node_found)
 684                                 m_sneak_node = new_sneak_node;
 685                 }
 686                 else
 687                 {
 688                         m_sneak_node = new_sneak_node;
 689                         m_sneak_node_exists = sneak_node_found;
 690                 }
 691
 692                 /*
 693                         If sneaking, the player's collision box can be in air, so
 694                         this has to be set explicitly
 695                 */
 696                 if(sneak_node_found && control.sneak)
 697                         touching_ground = true;
 698         }
 699
 700         /*
 701                 Set new position
 702         */
 703         setPosition(position);
 704 }
 705
 706 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 707 {
 708         move(dtime, map, pos_max_d, NULL);
 709 }
 710
 711 void LocalPlayer::applyControl(float dtime)
 712 {
 713         // Clear stuff
 714         swimming_up = false;
 715
 716         // Random constants
 717         f32 walk_acceleration = 4.0 * BS;
 718         f32 walkspeed_max = 4.0 * BS;
 719
 720         setPitch(control.pitch);
 721         setYaw(control.yaw);
 722
 723         v3f move_direction = v3f(0,0,1);
 724         move_direction.rotateXZBy(getYaw());
 725
 726         v3f speed = v3f(0,0,0);
 727
 728         bool free_move = g_settings.getBool("free_move");
 729         bool fast_move = g_settings.getBool("fast_move");
 730         bool continuous_forward = g_settings.getBool("continuous_forward");
 731
 732         if(free_move)
 733         {
 734                 v3f speed = getSpeed();
 735                 speed.Y = 0;
 736                 setSpeed(speed);
 737         }
 738
 739         // Whether superspeed mode is used or not
 740         bool superspeed = false;
 741
 742         // If free movement and fast movement, always move fast
 743         if(free_move && fast_move)
 744                 superspeed = true;
 745
 746         // Auxiliary button 1 (E)
 747         if(control.aux1)
 748         {
 749                 if(free_move)
 750                 {
 751                         // In free movement mode, aux1 descends
 752                         v3f speed = getSpeed();
 753                         if(fast_move)
 754                                 speed.Y = -20*BS;
 755                         else
 756                                 speed.Y = -walkspeed_max;
 757                         setSpeed(speed);
 758                 }
 759                 else
 760                 {
 761                         // If not free movement but fast is allowed, aux1 is
 762                         // "Turbo button"
 763                         if(fast_move)
 764                                 superspeed = true;
 765                 }
 766         }
 767
 768         if(continuous_forward)
 769                 speed += move_direction;
 770
 771         if(control.up)
 772         {
 773                 if(continuous_forward)
 774                         superspeed = true;
 775                 else
 776                         speed += move_direction;
 777         }
 778         if(control.down)
 779         {
 780                 speed -= move_direction;
 781         }
 782         if(control.left)
 783         {
 784                 speed += move_direction.crossProduct(v3f(0,1,0));
 785         }
 786         if(control.right)
 787         {
 788                 speed += move_direction.crossProduct(v3f(0,-1,0));
 789         }
 790         if(control.jump)
 791         {
 792                 if(free_move)
 793                 {
 794                         v3f speed = getSpeed();
 795                         if(fast_move)
 796                                 speed.Y = 20*BS;
 797                         else
 798                                 speed.Y = walkspeed_max;
 799                         setSpeed(speed);
 800                 }
 801                 else if(touching_ground)
 802                 {
 803                         v3f speed = getSpeed();
 804                         /*
 805                                 NOTE: The d value in move() affects jump height by
 806                                 raising the height at which the jump speed is kept
 807                                 at its starting value
 808                         */
 809                         speed.Y = 6.5*BS;
 810                         setSpeed(speed);
 811                 }
 812                 // Use the oscillating value for getting out of water
 813                 // (so that the player doesn't fly on the surface)
 814                 else if(in_water)
 815                 {
 816                         v3f speed = getSpeed();
 817                         speed.Y = 1.5*BS;
 818                         setSpeed(speed);
 819                         swimming_up = true;
 820                 }
 821         }
 822
 823         // The speed of the player (Y is ignored)
 824         if(superspeed)
 825                 speed = speed.normalize() * walkspeed_max * 5.0;
 826         else if(control.sneak)
 827                 speed = speed.normalize() * walkspeed_max / 3.0;
 828         else
 829                 speed = speed.normalize() * walkspeed_max;
 830
 831         f32 inc = walk_acceleration * BS * dtime;
 832
 833         // Faster acceleration if fast and free movement
 834         if(free_move && fast_move)
 835                 inc = walk_acceleration * BS * dtime * 10;
 836
 837         // Accelerate to target speed with maximum increment
 838         accelerate(speed, inc);
 839 }
 840 #endif
 841