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         privs(PRIV_DEFAULT),
  83         peer_id(PEER_ID_INEXISTENT),
  84         m_pitch(0),
  85         m_yaw(0),
  86         m_speed(0,0,0),
  87         m_position(0,0,0)
  88 {
  89         updateName("<not set>");
  90         updatePassword("");
  91         resetInventory();
  92 }
  93
  94 Player::~Player()
  95 {
  96 }
  97
  98 void Player::resetInventory()
  99 {
 100         inventory.clear();
 101         inventory.addList("main", PLAYER_INVENTORY_SIZE);
 102         inventory.addList("craft", 9);
 103         inventory.addList("craftresult", 1);
 104 }
 105
 106 // Y direction is ignored
 107 void Player::accelerate(v3f target_speed, f32 max_increase)
 108 {
 109         v3f d_wanted = target_speed - m_speed;
 110         d_wanted.Y = 0;
 111         f32 dl_wanted = d_wanted.getLength();
 112         f32 dl = dl_wanted;
 113         if(dl > max_increase)
 114                 dl = max_increase;
 115
 116         v3f d = d_wanted.normalize() * dl;
 117
 118         m_speed.X += d.X;
 119         m_speed.Z += d.Z;
 120         //m_speed += d;
 121
 122 #if 0 // old code
 123         if(m_speed.X < target_speed.X - max_increase)
 124                 m_speed.X += max_increase;
 125         else if(m_speed.X > target_speed.X + max_increase)
 126                 m_speed.X -= max_increase;
 127         else if(m_speed.X < target_speed.X)
 128                 m_speed.X = target_speed.X;
 129         else if(m_speed.X > target_speed.X)
 130                 m_speed.X = target_speed.X;
 131
 132         if(m_speed.Z < target_speed.Z - max_increase)
 133                 m_speed.Z += max_increase;
 134         else if(m_speed.Z > target_speed.Z + max_increase)
 135                 m_speed.Z -= max_increase;
 136         else if(m_speed.Z < target_speed.Z)
 137                 m_speed.Z = target_speed.Z;
 138         else if(m_speed.Z > target_speed.Z)
 139                 m_speed.Z = target_speed.Z;
 140 #endif
 141 }
 142
 143 void Player::serialize(std::ostream &os)
 144 {
 145         // Utilize a Settings object for storing values
 146         Settings args;
 147         args.setS32("version", 1);
 148         args.set("name", m_name);
 149         args.set("password", m_password);
 150         args.setFloat("pitch", m_pitch);
 151         args.setFloat("yaw", m_yaw);
 152         args.setV3F("position", m_position);
 153         args.setBool("craftresult_is_preview", craftresult_is_preview);
 154         args.setS32("hp", hp);
 155         args.setU64("privs", privs);
 156
 157         args.writeLines(os);
 158
 159         os<<"PlayerArgsEnd\n";
 160
 161         inventory.serialize(os);
 162 }
 163
 164 void Player::deSerialize(std::istream &is)
 165 {
 166         Settings args;
 167
 168         for(;;)
 169         {
 170                 if(is.eof())
 171                         throw SerializationError
 172                                         ("Player::deSerialize(): PlayerArgsEnd not found");
 173                 std::string line;
 174                 std::getline(is, line);
 175                 std::string trimmedline = trim(line);
 176                 if(trimmedline == "PlayerArgsEnd")
 177                         break;
 178                 args.parseConfigLine(line);
 179         }
 180
 181         //args.getS32("version");
 182         std::string name = args.get("name");
 183         updateName(name.c_str());
 184         std::string password = "";
 185         if(args.exists("password"))
 186                 password = args.get("password");
 187         updatePassword(password.c_str());
 188         m_pitch = args.getFloat("pitch");
 189         m_yaw = args.getFloat("yaw");
 190         m_position = args.getV3F("position");
 191         try{
 192                 craftresult_is_preview = args.getBool("craftresult_is_preview");
 193         }catch(SettingNotFoundException &e){
 194                 craftresult_is_preview = true;
 195         }
 196         try{
 197                 hp = args.getS32("hp");
 198         }catch(SettingNotFoundException &e){
 199                 hp = 20;
 200         }
 201         try{
 202                 std::string sprivs = args.get("privs");
 203                 if(sprivs == "all")
 204                 {
 205                         privs = PRIV_ALL;
 206                 }
 207                 else
 208                 {
 209                         std::istringstream ss(sprivs);
 210                         ss>>privs;
 211                 }
 212         }catch(SettingNotFoundException &e){
 213                 privs = PRIV_DEFAULT;
 214         }
 215
 216         inventory.deSerialize(is);
 217 }
 218
 219 /*
 220         RemotePlayer
 221 */
 222
 223 #ifndef SERVER
 224
 225 RemotePlayer::RemotePlayer(
 226                 scene::ISceneNode* parent,
 227                 IrrlichtDevice *device,
 228                 s32 id):
 229         scene::ISceneNode(parent, (device==NULL)?NULL:device->getSceneManager(), id),
 230         m_text(NULL)
 231 {
 232         m_box = core::aabbox3d<f32>(-BS/2,0,-BS/2,BS/2,BS*2,BS/2);
 233
 234         if(parent != NULL && device != NULL)
 235         {
 236                 // ISceneNode stores a member called SceneManager
 237                 scene::ISceneManager* mgr = SceneManager;
 238                 video::IVideoDriver* driver = mgr->getVideoDriver();
 239                 gui::IGUIEnvironment* gui = device->getGUIEnvironment();
 240
 241                 // Add a text node for showing the name
 242                 wchar_t wname[1] = {0};
 243                 m_text = mgr->addTextSceneNode(gui->getBuiltInFont(),
 244                                 wname, video::SColor(255,255,255,255), this);
 245                 m_text->setPosition(v3f(0, (f32)BS*2.1, 0));
 246
 247                 // Attach a simple mesh to the player for showing an image
 248                 scene::SMesh *mesh = new scene::SMesh();
 249                 { // Front
 250                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 251                 video::SColor c(255,255,255,255);
 252                 video::S3DVertex vertices[4] =
 253                 {
 254                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 255                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 256                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 257                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 258                 };
 259                 u16 indices[] = {0,1,2,2,3,0};
 260                 buf->append(vertices, 4, indices, 6);
 261                 // Set material
 262                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 263                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 264                 buf->getMaterial().setTexture(0, driver->getTexture(getTexturePath("player.png").c_str()));
 265                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 266                 buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
 267                 //buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 268                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 269                 // Add to mesh
 270                 mesh->addMeshBuffer(buf);
 271                 buf->drop();
 272                 }
 273                 { // Back
 274                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 275                 video::SColor c(255,255,255,255);
 276                 video::S3DVertex vertices[4] =
 277                 {
 278                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 279                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 280                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 281                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 282                 };
 283                 u16 indices[] = {0,1,2,2,3,0};
 284                 buf->append(vertices, 4, indices, 6);
 285                 // Set material
 286                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 287                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 288                 buf->getMaterial().setTexture(0, driver->getTexture(getTexturePath("player_back.png").c_str()));
 289                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 290                 buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
 291                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 292                 // Add to mesh
 293                 mesh->addMeshBuffer(buf);
 294                 buf->drop();
 295                 }
 296                 m_node = mgr->addMeshSceneNode(mesh, this);
 297                 mesh->drop();
 298                 m_node->setPosition(v3f(0,0,0));
 299         }
 300 }
 301
 302 RemotePlayer::~RemotePlayer()
 303 {
 304         if(SceneManager != NULL)
 305                 ISceneNode::remove();
 306 }
 307
 308 void RemotePlayer::updateName(const char *name)
 309 {
 310         Player::updateName(name);
 311         if(m_text != NULL)
 312         {
 313                 wchar_t wname[PLAYERNAME_SIZE];
 314                 mbstowcs(wname, m_name, strlen(m_name)+1);
 315                 m_text->setText(wname);
 316         }
 317 }
 318
 319 void RemotePlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 320 {
 321         m_pos_animation_time_counter += dtime;
 322         m_pos_animation_counter += dtime;
 323         v3f movevector = m_position - m_oldpos;
 324         f32 moveratio;
 325         if(m_pos_animation_time < 0.001)
 326                 moveratio = 1.0;
 327         else
 328                 moveratio = m_pos_animation_counter / m_pos_animation_time;
 329         if(moveratio > 1.5)
 330                 moveratio = 1.5;
 331         m_showpos = m_oldpos + movevector * moveratio;
 332
 333         ISceneNode::setPosition(m_showpos);
 334 }
 335
 336 #endif
 337
 338 #ifndef SERVER
 339 /*
 340         LocalPlayer
 341 */
 342
 343 LocalPlayer::LocalPlayer():
 344         m_sneak_node(32767,32767,32767),
 345         m_sneak_node_exists(false)
 346 {
 347         // Initialize hp to 0, so that no hearts will be shown if server
 348         // doesn't support health points
 349         hp = 0;
 350 }
 351
 352 LocalPlayer::~LocalPlayer()
 353 {
 354 }
 355
 356 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d,
 357                 core::list<CollisionInfo> *collision_info)
 358 {
 359         v3f position = getPosition();
 360         v3f oldpos = position;
 361         v3s16 oldpos_i = floatToInt(oldpos, BS);
 362
 363         /*std::cout<<"oldpos_i=("<<oldpos_i.X<<","<<oldpos_i.Y<<","
 364                         <<oldpos_i.Z<<")"<<std::endl;*/
 365
 366         /*
 367                 Calculate new position
 368         */
 369         position += m_speed * dtime;
 370
 371         // Skip collision detection if a special movement mode is used
 372         bool free_move = g_settings.getBool("free_move");
 373         if(free_move)
 374         {
 375                 setPosition(position);
 376                 return;
 377         }
 378
 379         /*
 380                 Collision detection
 381         */
 382
 383         // Player position in nodes
 384         v3s16 pos_i = floatToInt(position, BS);
 385
 386         /*
 387                 Check if player is in water (the oscillating value)
 388         */
 389         try{
 390                 // If in water, the threshold of coming out is at higher y
 391                 if(in_water)
 392                 {
 393                         v3s16 pp = floatToInt(position + v3f(0,BS*0.1,0), BS);
 394                         in_water = content_liquid(map.getNode(pp).d);
 395                 }
 396                 // If not in water, the threshold of going in is at lower y
 397                 else
 398                 {
 399                         v3s16 pp = floatToInt(position + v3f(0,BS*0.5,0), BS);
 400                         in_water = content_liquid(map.getNode(pp).d);
 401                 }
 402         }
 403         catch(InvalidPositionException &e)
 404         {
 405                 in_water = false;
 406         }
 407
 408         /*
 409                 Check if player is in water (the stable value)
 410         */
 411         try{
 412                 v3s16 pp = floatToInt(position + v3f(0,0,0), BS);
 413                 in_water_stable = content_liquid(map.getNode(pp).d);
 414         }
 415         catch(InvalidPositionException &e)
 416         {
 417                 in_water_stable = false;
 418         }
 419
 420         /*
 421                 Collision uncertainty radius
 422                 Make it a bit larger than the maximum distance of movement
 423         */
 424         //f32 d = pos_max_d * 1.1;
 425         // A fairly large value in here makes moving smoother
 426         f32 d = 0.15*BS;
 427
 428         // This should always apply, otherwise there are glitches
 429         assert(d > pos_max_d);
 430
 431         float player_radius = BS*0.35;
 432         float player_height = BS*1.7;
 433
 434         // Maximum distance over border for sneaking
 435         f32 sneak_max = BS*0.4;
 436
 437         /*
 438                 If sneaking, player has larger collision radius to keep from
 439                 falling
 440         */
 441         /*if(control.sneak)
 442                 player_radius = sneak_max + d*1.1;*/
 443
 444         /*
 445                 If sneaking, keep in range from the last walked node and don't
 446                 fall off from it
 447         */
 448         if(control.sneak && m_sneak_node_exists)
 449         {
 450                 f32 maxd = 0.5*BS + sneak_max;
 451                 v3f lwn_f = intToFloat(m_sneak_node, BS);
 452                 position.X = rangelim(position.X, lwn_f.X-maxd, lwn_f.X+maxd);
 453                 position.Z = rangelim(position.Z, lwn_f.Z-maxd, lwn_f.Z+maxd);
 454
 455                 f32 min_y = lwn_f.Y + 0.5*BS;
 456                 if(position.Y < min_y)
 457                 {
 458                         position.Y = min_y;
 459                         if(m_speed.Y < 0)
 460                                 m_speed.Y = 0;
 461                 }
 462         }
 463
 464         /*
 465                 Calculate player collision box (new and old)
 466         */
 467         core::aabbox3d<f32> playerbox(
 468                 position.X - player_radius,
 469                 position.Y - 0.0,
 470                 position.Z - player_radius,
 471                 position.X + player_radius,
 472                 position.Y + player_height,
 473                 position.Z + player_radius
 474         );
 475         core::aabbox3d<f32> playerbox_old(
 476                 oldpos.X - player_radius,
 477                 oldpos.Y - 0.0,
 478                 oldpos.Z - player_radius,
 479                 oldpos.X + player_radius,
 480                 oldpos.Y + player_height,
 481                 oldpos.Z + player_radius
 482         );
 483
 484         /*
 485                 If the player's feet touch the topside of any node, this is
 486                 set to true.
 487
 488                 Player is allowed to jump when this is true.
 489         */
 490         touching_ground = false;
 491
 492         /*std::cout<<"Checking collisions for ("
 493                         <<oldpos_i.X<<","<<oldpos_i.Y<<","<<oldpos_i.Z
 494                         <<") -> ("
 495                         <<pos_i.X<<","<<pos_i.Y<<","<<pos_i.Z
 496                         <<"):"<<std::endl;*/
 497
 498         /*
 499                 Go through every node around the player
 500         */
 501         for(s16 y = oldpos_i.Y - 1; y <= oldpos_i.Y + 2; y++)
 502         for(s16 z = oldpos_i.Z - 1; z <= oldpos_i.Z + 1; z++)
 503         for(s16 x = oldpos_i.X - 1; x <= oldpos_i.X + 1; x++)
 504         {
 505                 try{
 506                         // Player collides into walkable nodes
 507                         if(content_walkable(map.getNode(v3s16(x,y,z)).d) == false)
 508                                 continue;
 509                 }
 510                 catch(InvalidPositionException &e)
 511                 {
 512                         // Doing nothing here will block the player from
 513                         // walking over map borders
 514                 }
 515
 516                 core::aabbox3d<f32> nodebox = getNodeBox(v3s16(x,y,z), BS);
 517
 518                 /*
 519                         See if the player is touching ground.
 520
 521                         Player touches ground if player's minimum Y is near node's
 522                         maximum Y and player's X-Z-area overlaps with the node's
 523                         X-Z-area.
 524
 525                         Use 0.15*BS so that it is easier to get on a node.
 526                 */
 527                 if(
 528                                 //fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < d
 529                                 fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < 0.15*BS
 530                                 && nodebox.MaxEdge.X-d > playerbox.MinEdge.X
 531                                 && nodebox.MinEdge.X+d < playerbox.MaxEdge.X
 532                                 && nodebox.MaxEdge.Z-d > playerbox.MinEdge.Z
 533                                 && nodebox.MinEdge.Z+d < playerbox.MaxEdge.Z
 534                 ){
 535                         touching_ground = true;
 536                 }
 537
 538                 // If player doesn't intersect with node, ignore node.
 539                 if(playerbox.intersectsWithBox(nodebox) == false)
 540                         continue;
 541
 542                 /*
 543                         Go through every axis
 544                 */
 545                 v3f dirs[3] = {
 546                         v3f(0,0,1), // back-front
 547                         v3f(0,1,0), // top-bottom
 548                         v3f(1,0,0), // right-left
 549                 };
 550                 for(u16 i=0; i<3; i++)
 551                 {
 552                         /*
 553                                 Calculate values along the axis
 554                         */
 555                         f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[i]);
 556                         f32 nodemin = nodebox.MinEdge.dotProduct(dirs[i]);
 557                         f32 playermax = playerbox.MaxEdge.dotProduct(dirs[i]);
 558                         f32 playermin = playerbox.MinEdge.dotProduct(dirs[i]);
 559                         f32 playermax_old = playerbox_old.MaxEdge.dotProduct(dirs[i]);
 560                         f32 playermin_old = playerbox_old.MinEdge.dotProduct(dirs[i]);
 561
 562                         /*
 563                                 Check collision for the axis.
 564                                 Collision happens when player is going through a surface.
 565                         */
 566                         /*f32 neg_d = d;
 567                         f32 pos_d = d;
 568                         // Make it easier to get on top of a node
 569                         if(i == 1)
 570                                 neg_d = 0.15*BS;
 571                         bool negative_axis_collides =
 572                                 (nodemax > playermin && nodemax <= playermin_old + neg_d
 573                                         && m_speed.dotProduct(dirs[i]) < 0);
 574                         bool positive_axis_collides =
 575                                 (nodemin < playermax && nodemin >= playermax_old - pos_d
 576                                         && m_speed.dotProduct(dirs[i]) > 0);*/
 577                         bool negative_axis_collides =
 578                                 (nodemax > playermin && nodemax <= playermin_old + d
 579                                         && m_speed.dotProduct(dirs[i]) < 0);
 580                         bool positive_axis_collides =
 581                                 (nodemin < playermax && nodemin >= playermax_old - d
 582                                         && m_speed.dotProduct(dirs[i]) > 0);
 583                         bool main_axis_collides =
 584                                         negative_axis_collides || positive_axis_collides;
 585
 586                         /*
 587                                 Check overlap of player and node in other axes
 588                         */
 589                         bool other_axes_overlap = true;
 590                         for(u16 j=0; j<3; j++)
 591                         {
 592                                 if(j == i)
 593                                         continue;
 594                                 f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[j]);
 595                                 f32 nodemin = nodebox.MinEdge.dotProduct(dirs[j]);
 596                                 f32 playermax = playerbox.MaxEdge.dotProduct(dirs[j]);
 597                                 f32 playermin = playerbox.MinEdge.dotProduct(dirs[j]);
 598                                 if(!(nodemax - d > playermin && nodemin + d < playermax))
 599                                 {
 600                                         other_axes_overlap = false;
 601                                         break;
 602                                 }
 603                         }
 604
 605                         /*
 606                                 If this is a collision, revert the position in the main
 607                                 direction.
 608                         */
 609                         if(other_axes_overlap && main_axis_collides)
 610                         {
 611                                 v3f old_speed = m_speed;
 612
 613                                 m_speed -= m_speed.dotProduct(dirs[i]) * dirs[i];
 614                                 position -= position.dotProduct(dirs[i]) * dirs[i];
 615                                 position += oldpos.dotProduct(dirs[i]) * dirs[i];
 616
 617                                 if(collision_info)
 618                                 {
 619                                         // Report fall collision
 620                                         if(old_speed.Y < m_speed.Y - 0.1)
 621                                         {
 622                                                 CollisionInfo info;
 623                                                 info.t = COLLISION_FALL;
 624                                                 info.speed = m_speed.Y - old_speed.Y;
 625                                                 collision_info->push_back(info);
 626                                         }
 627                                 }
 628                         }
 629
 630                 }
 631         } // xyz
 632
 633         /*
 634                 Check the nodes under the player to see from which node the
 635                 player is sneaking from, if any.
 636         */
 637         {
 638                 v3s16 pos_i_bottom = floatToInt(position - v3f(0,BS/2,0), BS);
 639                 v2f player_p2df(position.X, position.Z);
 640                 f32 min_distance_f = 100000.0*BS;
 641                 // If already seeking from some node, compare to it.
 642                 /*if(m_sneak_node_exists)
 643                 {
 644                         v3f sneaknode_pf = intToFloat(m_sneak_node, BS);
 645                         v2f sneaknode_p2df(sneaknode_pf.X, sneaknode_pf.Z);
 646                         f32 d_horiz_f = player_p2df.getDistanceFrom(sneaknode_p2df);
 647                         f32 d_vert_f = fabs(sneaknode_pf.Y + BS*0.5 - position.Y);
 648                         // Ignore if player is not on the same level (likely dropped)
 649                         if(d_vert_f < 0.15*BS)
 650                                 min_distance_f = d_horiz_f;
 651                 }*/
 652                 v3s16 new_sneak_node = m_sneak_node;
 653                 for(s16 x=-1; x<=1; x++)
 654                 for(s16 z=-1; z<=1; z++)
 655                 {
 656                         v3s16 p = pos_i_bottom + v3s16(x,0,z);
 657                         v3f pf = intToFloat(p, BS);
 658                         v2f node_p2df(pf.X, pf.Z);
 659                         f32 distance_f = player_p2df.getDistanceFrom(node_p2df);
 660                         f32 max_axis_distance_f = MYMAX(
 661                                         fabs(player_p2df.X-node_p2df.X),
 662                                         fabs(player_p2df.Y-node_p2df.Y));
 663
 664                         if(distance_f > min_distance_f ||
 665                                         max_axis_distance_f > 0.5*BS + sneak_max + 0.1*BS)
 666                                 continue;
 667
 668                         try{
 669                                 // The node to be sneaked on has to be walkable
 670                                 if(content_walkable(map.getNode(p).d) == false)
 671                                         continue;
 672                                 // And the node above it has to be nonwalkable
 673                                 if(content_walkable(map.getNode(p+v3s16(0,1,0)).d) == true)
 674                                         continue;
 675                         }
 676                         catch(InvalidPositionException &e)
 677                         {
 678                                 continue;
 679                         }
 680
 681                         min_distance_f = distance_f;
 682                         new_sneak_node = p;
 683                 }
 684
 685                 bool sneak_node_found = (min_distance_f < 100000.0*BS*0.9);
 686
 687                 if(control.sneak && m_sneak_node_exists)
 688                 {
 689                         if(sneak_node_found)
 690                                 m_sneak_node = new_sneak_node;
 691                 }
 692                 else
 693                 {
 694                         m_sneak_node = new_sneak_node;
 695                         m_sneak_node_exists = sneak_node_found;
 696                 }
 697
 698                 /*
 699                         If sneaking, the player's collision box can be in air, so
 700                         this has to be set explicitly
 701                 */
 702                 if(sneak_node_found && control.sneak)
 703                         touching_ground = true;
 704         }
 705
 706         /*
 707                 Set new position
 708         */
 709         setPosition(position);
 710 }
 711
 712 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 713 {
 714         move(dtime, map, pos_max_d, NULL);
 715 }
 716
 717 void LocalPlayer::applyControl(float dtime)
 718 {
 719         // Clear stuff
 720         swimming_up = false;
 721
 722         // Random constants
 723         f32 walk_acceleration = 4.0 * BS;
 724         f32 walkspeed_max = 4.0 * BS;
 725
 726         setPitch(control.pitch);
 727         setYaw(control.yaw);
 728
 729         v3f move_direction = v3f(0,0,1);
 730         move_direction.rotateXZBy(getYaw());
 731
 732         v3f speed = v3f(0,0,0);
 733
 734         bool free_move = g_settings.getBool("free_move");
 735         bool fast_move = g_settings.getBool("fast_move");
 736         bool continuous_forward = g_settings.getBool("continuous_forward");
 737
 738         if(free_move)
 739         {
 740                 v3f speed = getSpeed();
 741                 speed.Y = 0;
 742                 setSpeed(speed);
 743         }
 744
 745         // Whether superspeed mode is used or not
 746         bool superspeed = false;
 747
 748         // If free movement and fast movement, always move fast
 749         if(free_move && fast_move)
 750                 superspeed = true;
 751
 752         // Auxiliary button 1 (E)
 753         if(control.aux1)
 754         {
 755                 if(free_move)
 756                 {
 757                         // In free movement mode, aux1 descends
 758                         v3f speed = getSpeed();
 759                         if(fast_move)
 760                                 speed.Y = -20*BS;
 761                         else
 762                                 speed.Y = -walkspeed_max;
 763                         setSpeed(speed);
 764                 }
 765                 else
 766                 {
 767                         // If not free movement but fast is allowed, aux1 is
 768                         // "Turbo button"
 769                         if(fast_move)
 770                                 superspeed = true;
 771                 }
 772         }
 773
 774         if(continuous_forward)
 775                 speed += move_direction;
 776
 777         if(control.up)
 778         {
 779                 if(continuous_forward)
 780                         superspeed = true;
 781                 else
 782                         speed += move_direction;
 783         }
 784         if(control.down)
 785         {
 786                 speed -= move_direction;
 787         }
 788         if(control.left)
 789         {
 790                 speed += move_direction.crossProduct(v3f(0,1,0));
 791         }
 792         if(control.right)
 793         {
 794                 speed += move_direction.crossProduct(v3f(0,-1,0));
 795         }
 796         if(control.jump)
 797         {
 798                 if(free_move)
 799                 {
 800                         v3f speed = getSpeed();
 801                         if(fast_move)
 802                                 speed.Y = 20*BS;
 803                         else
 804                                 speed.Y = walkspeed_max;
 805                         setSpeed(speed);
 806                 }
 807                 else if(touching_ground)
 808                 {
 809                         v3f speed = getSpeed();
 810                         /*
 811                                 NOTE: The d value in move() affects jump height by
 812                                 raising the height at which the jump speed is kept
 813                                 at its starting value
 814                         */
 815                         speed.Y = 6.5*BS;
 816                         setSpeed(speed);
 817                 }
 818                 // Use the oscillating value for getting out of water
 819                 // (so that the player doesn't fly on the surface)
 820                 else if(in_water)
 821                 {
 822                         v3f speed = getSpeed();
 823                         speed.Y = 1.5*BS;
 824                         setSpeed(speed);
 825                         swimming_up = true;
 826                 }
 827         }
 828
 829         // The speed of the player (Y is ignored)
 830         if(superspeed)
 831                 speed = speed.normalize() * walkspeed_max * 5.0;
 832         else if(control.sneak)
 833                 speed = speed.normalize() * walkspeed_max / 3.0;
 834         else
 835                 speed = speed.normalize() * walkspeed_max;
 836
 837         f32 inc = walk_acceleration * BS * dtime;
 838
 839         // Faster acceleration if fast and free movement
 840         if(free_move && fast_move)
 841                 inc = walk_acceleration * BS * dtime * 10;
 842
 843         // Accelerate to target speed with maximum increment
 844         accelerate(speed, inc);
 845 }
 846 #endif
 847