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