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 #ifndef SERVER
  26 #include <ITextSceneNode.h>
  27 #endif
  28 #include "settings.h"
  29
  30 Player::Player():
  31         touching_ground(false),
  32         in_water(false),
  33         in_water_stable(false),
  34         is_climbing(false),
  35         swimming_up(false),
  36         inventory_backup(NULL),
  37         craftresult_is_preview(true),
  38         hp(20),
  39         peer_id(PEER_ID_INEXISTENT),
  40         m_selected_item(0),
  41         m_pitch(0),
  42         m_yaw(0),
  43         m_speed(0,0,0),
  44         m_position(0,0,0)
  45 {
  46         updateName("<not set>");
  47         resetInventory();
  48 }
  49
  50 Player::~Player()
  51 {
  52         delete inventory_backup;
  53 }
  54
  55 void Player::wieldItem(u16 item)
  56 {
  57         m_selected_item = item;
  58 }
  59
  60 void Player::resetInventory()
  61 {
  62         inventory.clear();
  63         inventory.addList("main", PLAYER_INVENTORY_SIZE);
  64         inventory.addList("craft", 9);
  65         inventory.addList("craftresult", 1);
  66 }
  67
  68 // Y direction is ignored
  69 void Player::accelerate(v3f target_speed, f32 max_increase)
  70 {
  71         v3f d_wanted = target_speed - m_speed;
  72         d_wanted.Y = 0;
  73         f32 dl_wanted = d_wanted.getLength();
  74         f32 dl = dl_wanted;
  75         if(dl > max_increase)
  76                 dl = max_increase;
  77
  78         v3f d = d_wanted.normalize() * dl;
  79
  80         m_speed.X += d.X;
  81         m_speed.Z += d.Z;
  82         //m_speed += d;
  83
  84 #if 0 // old code
  85         if(m_speed.X < target_speed.X - max_increase)
  86                 m_speed.X += max_increase;
  87         else if(m_speed.X > target_speed.X + max_increase)
  88                 m_speed.X -= max_increase;
  89         else if(m_speed.X < target_speed.X)
  90                 m_speed.X = target_speed.X;
  91         else if(m_speed.X > target_speed.X)
  92                 m_speed.X = target_speed.X;
  93
  94         if(m_speed.Z < target_speed.Z - max_increase)
  95                 m_speed.Z += max_increase;
  96         else if(m_speed.Z > target_speed.Z + max_increase)
  97                 m_speed.Z -= max_increase;
  98         else if(m_speed.Z < target_speed.Z)
  99                 m_speed.Z = target_speed.Z;
 100         else if(m_speed.Z > target_speed.Z)
 101                 m_speed.Z = target_speed.Z;
 102 #endif
 103 }
 104
 105 void Player::serialize(std::ostream &os)
 106 {
 107         // Utilize a Settings object for storing values
 108         Settings args;
 109         args.setS32("version", 1);
 110         args.set("name", m_name);
 111         //args.set("password", m_password);
 112         args.setFloat("pitch", m_pitch);
 113         args.setFloat("yaw", m_yaw);
 114         args.setV3F("position", m_position);
 115         args.setBool("craftresult_is_preview", craftresult_is_preview);
 116         args.setS32("hp", hp);
 117
 118         args.writeLines(os);
 119
 120         os<<"PlayerArgsEnd\n";
 121
 122         // If actual inventory is backed up due to creative mode, save it
 123         // instead of the dummy creative mode inventory
 124         if(inventory_backup)
 125                 inventory_backup->serialize(os);
 126         else
 127                 inventory.serialize(os);
 128 }
 129
 130 void Player::deSerialize(std::istream &is)
 131 {
 132         Settings args;
 133
 134         for(;;)
 135         {
 136                 if(is.eof())
 137                         throw SerializationError
 138                                         ("Player::deSerialize(): PlayerArgsEnd not found");
 139                 std::string line;
 140                 std::getline(is, line);
 141                 std::string trimmedline = trim(line);
 142                 if(trimmedline == "PlayerArgsEnd")
 143                         break;
 144                 args.parseConfigLine(line);
 145         }
 146
 147         //args.getS32("version"); // Version field value not used
 148         std::string name = args.get("name");
 149         updateName(name.c_str());
 150         setPitch(args.getFloat("pitch"));
 151         setYaw(args.getFloat("yaw"));
 152         setPosition(args.getV3F("position"));
 153         try{
 154                 craftresult_is_preview = args.getBool("craftresult_is_preview");
 155         }catch(SettingNotFoundException &e){
 156                 craftresult_is_preview = true;
 157         }
 158         try{
 159                 hp = args.getS32("hp");
 160         }catch(SettingNotFoundException &e){
 161                 hp = 20;
 162         }
 163
 164         inventory.deSerialize(is);
 165 }
 166
 167 /*
 168         RemotePlayer
 169 */
 170
 171 #ifndef SERVER
 172
 173 RemotePlayer::RemotePlayer(
 174                 scene::ISceneNode* parent,
 175                 IrrlichtDevice *device,
 176                 s32 id):
 177         scene::ISceneNode(parent, (device==NULL)?NULL:device->getSceneManager(), id),
 178         m_text(NULL)
 179 {
 180         m_box = core::aabbox3d<f32>(-BS/2,0,-BS/2,BS/2,BS*2,BS/2);
 181
 182         if(parent != NULL && device != NULL)
 183         {
 184                 // ISceneNode stores a member called SceneManager
 185                 scene::ISceneManager* mgr = SceneManager;
 186                 video::IVideoDriver* driver = mgr->getVideoDriver();
 187                 gui::IGUIEnvironment* gui = device->getGUIEnvironment();
 188
 189                 // Add a text node for showing the name
 190                 wchar_t wname[1] = {0};
 191                 m_text = mgr->addTextSceneNode(gui->getBuiltInFont(),
 192                                 wname, video::SColor(255,255,255,255), this);
 193                 m_text->setPosition(v3f(0, (f32)BS*2.1, 0));
 194
 195                 // Attach a simple mesh to the player for showing an image
 196                 scene::SMesh *mesh = new scene::SMesh();
 197                 { // Front
 198                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 199                 video::SColor c(255,255,255,255);
 200                 video::S3DVertex vertices[4] =
 201                 {
 202                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 203                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 204                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 205                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 206                 };
 207                 u16 indices[] = {0,1,2,2,3,0};
 208                 buf->append(vertices, 4, indices, 6);
 209                 // Set material
 210                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 211                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 212                 buf->getMaterial().setTexture(0, driver->getTexture(getTexturePath("player.png").c_str()));
 213                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 214                 buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
 215                 //buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
 216                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 217                 // Add to mesh
 218                 mesh->addMeshBuffer(buf);
 219                 buf->drop();
 220                 }
 221                 { // Back
 222                 scene::IMeshBuffer *buf = new scene::SMeshBuffer();
 223                 video::SColor c(255,255,255,255);
 224                 video::S3DVertex vertices[4] =
 225                 {
 226                         video::S3DVertex(BS/2,0,0, 0,0,0, c, 1,1),
 227                         video::S3DVertex(-BS/2,0,0, 0,0,0, c, 0,1),
 228                         video::S3DVertex(-BS/2,BS*2,0, 0,0,0, c, 0,0),
 229                         video::S3DVertex(BS/2,BS*2,0, 0,0,0, c, 1,0),
 230                 };
 231                 u16 indices[] = {0,1,2,2,3,0};
 232                 buf->append(vertices, 4, indices, 6);
 233                 // Set material
 234                 buf->getMaterial().setFlag(video::EMF_LIGHTING, false);
 235                 //buf->getMaterial().setFlag(video::EMF_BACK_FACE_CULLING, false);
 236                 buf->getMaterial().setTexture(0, driver->getTexture(getTexturePath("player_back.png").c_str()));
 237                 buf->getMaterial().setFlag(video::EMF_BILINEAR_FILTER, false);
 238                 buf->getMaterial().setFlag(video::EMF_FOG_ENABLE, true);
 239                 buf->getMaterial().MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
 240                 // Add to mesh
 241                 mesh->addMeshBuffer(buf);
 242                 buf->drop();
 243                 }
 244                 m_node = mgr->addMeshSceneNode(mesh, this);
 245                 mesh->drop();
 246                 m_node->setPosition(v3f(0,0,0));
 247         }
 248 }
 249
 250 RemotePlayer::~RemotePlayer()
 251 {
 252         if(SceneManager != NULL)
 253                 ISceneNode::remove();
 254 }
 255
 256 void RemotePlayer::updateName(const char *name)
 257 {
 258         Player::updateName(name);
 259         if(m_text != NULL)
 260         {
 261                 wchar_t wname[PLAYERNAME_SIZE];
 262                 mbstowcs(wname, m_name, strlen(m_name)+1);
 263                 m_text->setText(wname);
 264         }
 265 }
 266
 267 void RemotePlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 268 {
 269         m_pos_animation_time_counter += dtime;
 270         m_pos_animation_counter += dtime;
 271         v3f movevector = m_position - m_oldpos;
 272         f32 moveratio;
 273         if(m_pos_animation_time < 0.001)
 274                 moveratio = 1.0;
 275         else
 276                 moveratio = m_pos_animation_counter / m_pos_animation_time;
 277         if(moveratio > 1.5)
 278                 moveratio = 1.5;
 279         m_showpos = m_oldpos + movevector * moveratio;
 280
 281         ISceneNode::setPosition(m_showpos);
 282 }
 283
 284 #endif
 285
 286 #ifndef SERVER
 287 /*
 288         LocalPlayer
 289 */
 290
 291 LocalPlayer::LocalPlayer():
 292         m_sneak_node(32767,32767,32767),
 293         m_sneak_node_exists(false)
 294 {
 295         // Initialize hp to 0, so that no hearts will be shown if server
 296         // doesn't support health points
 297         hp = 0;
 298 }
 299
 300 LocalPlayer::~LocalPlayer()
 301 {
 302 }
 303
 304 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d,
 305                 core::list<CollisionInfo> *collision_info)
 306 {
 307         v3f position = getPosition();
 308         v3f oldpos = position;
 309         v3s16 oldpos_i = floatToInt(oldpos, BS);
 310
 311         v3f old_speed = m_speed;
 312
 313         /*std::cout<<"oldpos_i=("<<oldpos_i.X<<","<<oldpos_i.Y<<","
 314                         <<oldpos_i.Z<<")"<<std::endl;*/
 315
 316         /*
 317                 Calculate new position
 318         */
 319         position += m_speed * dtime;
 320
 321         // Skip collision detection if a special movement mode is used
 322         bool free_move = g_settings->getBool("free_move");
 323         if(free_move)
 324         {
 325                 setPosition(position);
 326                 return;
 327         }
 328
 329         /*
 330                 Collision detection
 331         */
 332
 333         // Player position in nodes
 334         v3s16 pos_i = floatToInt(position, BS);
 335
 336         /*
 337                 Check if player is in water (the oscillating value)
 338         */
 339         try{
 340                 // If in water, the threshold of coming out is at higher y
 341                 if(in_water)
 342                 {
 343                         v3s16 pp = floatToInt(position + v3f(0,BS*0.1,0), BS);
 344                         in_water = content_liquid(map.getNode(pp).getContent());
 345                 }
 346                 // If not in water, the threshold of going in is at lower y
 347                 else
 348                 {
 349                         v3s16 pp = floatToInt(position + v3f(0,BS*0.5,0), BS);
 350                         in_water = content_liquid(map.getNode(pp).getContent());
 351                 }
 352         }
 353         catch(InvalidPositionException &e)
 354         {
 355                 in_water = false;
 356         }
 357
 358         /*
 359                 Check if player is in water (the stable value)
 360         */
 361         try{
 362                 v3s16 pp = floatToInt(position + v3f(0,0,0), BS);
 363                 in_water_stable = content_liquid(map.getNode(pp).getContent());
 364         }
 365         catch(InvalidPositionException &e)
 366         {
 367                 in_water_stable = false;
 368         }
 369
 370         /*
 371                 Check if player is climbing
 372         */
 373
 374         try {
 375                 v3s16 pp = floatToInt(position + v3f(0,0.5*BS,0), BS);
 376                 v3s16 pp2 = floatToInt(position + v3f(0,-0.2*BS,0), BS);
 377                 is_climbing = ((content_features(map.getNode(pp).getContent()).climbable ||
 378                                 content_features(map.getNode(pp2).getContent()).climbable) && !free_move);
 379         }
 380         catch(InvalidPositionException &e)
 381         {
 382                 is_climbing = false;
 383         }
 384
 385         /*
 386                 Collision uncertainty radius
 387                 Make it a bit larger than the maximum distance of movement
 388         */
 389         //f32 d = pos_max_d * 1.1;
 390         // A fairly large value in here makes moving smoother
 391         f32 d = 0.15*BS;
 392
 393         // This should always apply, otherwise there are glitches
 394         assert(d > pos_max_d);
 395
 396         float player_radius = BS*0.35;
 397         float player_height = BS*1.7;
 398
 399         // Maximum distance over border for sneaking
 400         f32 sneak_max = BS*0.4;
 401
 402         /*
 403                 If sneaking, player has larger collision radius to keep from
 404                 falling
 405         */
 406         /*if(control.sneak)
 407                 player_radius = sneak_max + d*1.1;*/
 408
 409         /*
 410                 If sneaking, keep in range from the last walked node and don't
 411                 fall off from it
 412         */
 413         if(control.sneak && m_sneak_node_exists)
 414         {
 415                 f32 maxd = 0.5*BS + sneak_max;
 416                 v3f lwn_f = intToFloat(m_sneak_node, BS);
 417                 position.X = rangelim(position.X, lwn_f.X-maxd, lwn_f.X+maxd);
 418                 position.Z = rangelim(position.Z, lwn_f.Z-maxd, lwn_f.Z+maxd);
 419
 420                 f32 min_y = lwn_f.Y + 0.5*BS;
 421                 if(position.Y < min_y)
 422                 {
 423                         position.Y = min_y;
 424
 425                         //v3f old_speed = m_speed;
 426
 427                         if(m_speed.Y < 0)
 428                                 m_speed.Y = 0;
 429
 430                         /*if(collision_info)
 431                         {
 432                                 // Report fall collision
 433                                 if(old_speed.Y < m_speed.Y - 0.1)
 434                                 {
 435                                         CollisionInfo info;
 436                                         info.t = COLLISION_FALL;
 437                                         info.speed = m_speed.Y - old_speed.Y;
 438                                         collision_info->push_back(info);
 439                                 }
 440                         }*/
 441                 }
 442         }
 443
 444         /*
 445                 Calculate player collision box (new and old)
 446         */
 447         core::aabbox3d<f32> playerbox(
 448                 position.X - player_radius,
 449                 position.Y - 0.0,
 450                 position.Z - player_radius,
 451                 position.X + player_radius,
 452                 position.Y + player_height,
 453                 position.Z + player_radius
 454         );
 455         core::aabbox3d<f32> playerbox_old(
 456                 oldpos.X - player_radius,
 457                 oldpos.Y - 0.0,
 458                 oldpos.Z - player_radius,
 459                 oldpos.X + player_radius,
 460                 oldpos.Y + player_height,
 461                 oldpos.Z + player_radius
 462         );
 463
 464         /*
 465                 If the player's feet touch the topside of any node, this is
 466                 set to true.
 467
 468                 Player is allowed to jump when this is true.
 469         */
 470         touching_ground = false;
 471
 472         /*std::cout<<"Checking collisions for ("
 473                         <<oldpos_i.X<<","<<oldpos_i.Y<<","<<oldpos_i.Z
 474                         <<") -> ("
 475                         <<pos_i.X<<","<<pos_i.Y<<","<<pos_i.Z
 476                         <<"):"<<std::endl;*/
 477
 478         bool standing_on_unloaded = false;
 479
 480         /*
 481                 Go through every node around the player
 482         */
 483         for(s16 y = oldpos_i.Y - 1; y <= oldpos_i.Y + 2; y++)
 484         for(s16 z = oldpos_i.Z - 1; z <= oldpos_i.Z + 1; z++)
 485         for(s16 x = oldpos_i.X - 1; x <= oldpos_i.X + 1; x++)
 486         {
 487                 bool is_unloaded = false;
 488                 try{
 489                         // Player collides into walkable nodes
 490                         if(content_walkable(map.getNode(v3s16(x,y,z)).getContent()) == false)
 491                                 continue;
 492                 }
 493                 catch(InvalidPositionException &e)
 494                 {
 495                         is_unloaded = true;
 496                         // Doing nothing here will block the player from
 497                         // walking over map borders
 498                 }
 499
 500                 core::aabbox3d<f32> nodebox = getNodeBox(v3s16(x,y,z), BS);
 501
 502                 /*
 503                         See if the player is touching ground.
 504
 505                         Player touches ground if player's minimum Y is near node's
 506                         maximum Y and player's X-Z-area overlaps with the node's
 507                         X-Z-area.
 508
 509                         Use 0.15*BS so that it is easier to get on a node.
 510                 */
 511                 if(
 512                                 //fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < d
 513                                 fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < 0.15*BS
 514                                 && nodebox.MaxEdge.X-d > playerbox.MinEdge.X
 515                                 && nodebox.MinEdge.X+d < playerbox.MaxEdge.X
 516                                 && nodebox.MaxEdge.Z-d > playerbox.MinEdge.Z
 517                                 && nodebox.MinEdge.Z+d < playerbox.MaxEdge.Z
 518                 ){
 519                         touching_ground = true;
 520                         if(is_unloaded)
 521                                 standing_on_unloaded = true;
 522                 }
 523
 524                 // If player doesn't intersect with node, ignore node.
 525                 if(playerbox.intersectsWithBox(nodebox) == false)
 526                         continue;
 527
 528                 /*
 529                         Go through every axis
 530                 */
 531                 v3f dirs[3] = {
 532                         v3f(0,0,1), // back-front
 533                         v3f(0,1,0), // top-bottom
 534                         v3f(1,0,0), // right-left
 535                 };
 536                 for(u16 i=0; i<3; i++)
 537                 {
 538                         /*
 539                                 Calculate values along the axis
 540                         */
 541                         f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[i]);
 542                         f32 nodemin = nodebox.MinEdge.dotProduct(dirs[i]);
 543                         f32 playermax = playerbox.MaxEdge.dotProduct(dirs[i]);
 544                         f32 playermin = playerbox.MinEdge.dotProduct(dirs[i]);
 545                         f32 playermax_old = playerbox_old.MaxEdge.dotProduct(dirs[i]);
 546                         f32 playermin_old = playerbox_old.MinEdge.dotProduct(dirs[i]);
 547
 548                         /*
 549                                 Check collision for the axis.
 550                                 Collision happens when player is going through a surface.
 551                         */
 552                         /*f32 neg_d = d;
 553                         f32 pos_d = d;
 554                         // Make it easier to get on top of a node
 555                         if(i == 1)
 556                                 neg_d = 0.15*BS;
 557                         bool negative_axis_collides =
 558                                 (nodemax > playermin && nodemax <= playermin_old + neg_d
 559                                         && m_speed.dotProduct(dirs[i]) < 0);
 560                         bool positive_axis_collides =
 561                                 (nodemin < playermax && nodemin >= playermax_old - pos_d
 562                                         && m_speed.dotProduct(dirs[i]) > 0);*/
 563                         bool negative_axis_collides =
 564                                 (nodemax > playermin && nodemax <= playermin_old + d
 565                                         && m_speed.dotProduct(dirs[i]) < 0);
 566                         bool positive_axis_collides =
 567                                 (nodemin < playermax && nodemin >= playermax_old - d
 568                                         && m_speed.dotProduct(dirs[i]) > 0);
 569                         bool main_axis_collides =
 570                                         negative_axis_collides || positive_axis_collides;
 571
 572                         /*
 573                                 Check overlap of player and node in other axes
 574                         */
 575                         bool other_axes_overlap = true;
 576                         for(u16 j=0; j<3; j++)
 577                         {
 578                                 if(j == i)
 579                                         continue;
 580                                 f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[j]);
 581                                 f32 nodemin = nodebox.MinEdge.dotProduct(dirs[j]);
 582                                 f32 playermax = playerbox.MaxEdge.dotProduct(dirs[j]);
 583                                 f32 playermin = playerbox.MinEdge.dotProduct(dirs[j]);
 584                                 if(!(nodemax - d > playermin && nodemin + d < playermax))
 585                                 {
 586                                         other_axes_overlap = false;
 587                                         break;
 588                                 }
 589                         }
 590
 591                         /*
 592                                 If this is a collision, revert the position in the main
 593                                 direction.
 594                         */
 595                         if(other_axes_overlap && main_axis_collides)
 596                         {
 597                                 //v3f old_speed = m_speed;
 598
 599                                 m_speed -= m_speed.dotProduct(dirs[i]) * dirs[i];
 600                                 position -= position.dotProduct(dirs[i]) * dirs[i];
 601                                 position += oldpos.dotProduct(dirs[i]) * dirs[i];
 602
 603                                 /*if(collision_info)
 604                                 {
 605                                         // Report fall collision
 606                                         if(old_speed.Y < m_speed.Y - 0.1)
 607                                         {
 608                                                 CollisionInfo info;
 609                                                 info.t = COLLISION_FALL;
 610                                                 info.speed = m_speed.Y - old_speed.Y;
 611                                                 collision_info->push_back(info);
 612                                         }
 613                                 }*/
 614                         }
 615
 616                 }
 617         } // xyz
 618
 619         /*
 620                 Check the nodes under the player to see from which node the
 621                 player is sneaking from, if any.
 622         */
 623         {
 624                 v3s16 pos_i_bottom = floatToInt(position - v3f(0,BS/2,0), BS);
 625                 v2f player_p2df(position.X, position.Z);
 626                 f32 min_distance_f = 100000.0*BS;
 627                 // If already seeking from some node, compare to it.
 628                 /*if(m_sneak_node_exists)
 629                 {
 630                         v3f sneaknode_pf = intToFloat(m_sneak_node, BS);
 631                         v2f sneaknode_p2df(sneaknode_pf.X, sneaknode_pf.Z);
 632                         f32 d_horiz_f = player_p2df.getDistanceFrom(sneaknode_p2df);
 633                         f32 d_vert_f = fabs(sneaknode_pf.Y + BS*0.5 - position.Y);
 634                         // Ignore if player is not on the same level (likely dropped)
 635                         if(d_vert_f < 0.15*BS)
 636                                 min_distance_f = d_horiz_f;
 637                 }*/
 638                 v3s16 new_sneak_node = m_sneak_node;
 639                 for(s16 x=-1; x<=1; x++)
 640                 for(s16 z=-1; z<=1; z++)
 641                 {
 642                         v3s16 p = pos_i_bottom + v3s16(x,0,z);
 643                         v3f pf = intToFloat(p, BS);
 644                         v2f node_p2df(pf.X, pf.Z);
 645                         f32 distance_f = player_p2df.getDistanceFrom(node_p2df);
 646                         f32 max_axis_distance_f = MYMAX(
 647                                         fabs(player_p2df.X-node_p2df.X),
 648                                         fabs(player_p2df.Y-node_p2df.Y));
 649
 650                         if(distance_f > min_distance_f ||
 651                                         max_axis_distance_f > 0.5*BS + sneak_max + 0.1*BS)
 652                                 continue;
 653
 654                         try{
 655                                 // The node to be sneaked on has to be walkable
 656                                 if(content_walkable(map.getNode(p).getContent()) == false)
 657                                         continue;
 658                                 // And the node above it has to be nonwalkable
 659                                 if(content_walkable(map.getNode(p+v3s16(0,1,0)).getContent()) == true)
 660                                         continue;
 661                         }
 662                         catch(InvalidPositionException &e)
 663                         {
 664                                 continue;
 665                         }
 666
 667                         min_distance_f = distance_f;
 668                         new_sneak_node = p;
 669                 }
 670
 671                 bool sneak_node_found = (min_distance_f < 100000.0*BS*0.9);
 672
 673                 if(control.sneak && m_sneak_node_exists)
 674                 {
 675                         if(sneak_node_found)
 676                                 m_sneak_node = new_sneak_node;
 677                 }
 678                 else
 679                 {
 680                         m_sneak_node = new_sneak_node;
 681                         m_sneak_node_exists = sneak_node_found;
 682                 }
 683
 684                 /*
 685                         If sneaking, the player's collision box can be in air, so
 686                         this has to be set explicitly
 687                 */
 688                 if(sneak_node_found && control.sneak)
 689                         touching_ground = true;
 690         }
 691
 692         /*
 693                 Set new position
 694         */
 695         setPosition(position);
 696
 697         /*
 698                 Report collisions
 699         */
 700         if(collision_info)
 701         {
 702                 // Report fall collision
 703                 if(old_speed.Y < m_speed.Y - 0.1 && !standing_on_unloaded)
 704                 {
 705                         CollisionInfo info;
 706                         info.t = COLLISION_FALL;
 707                         info.speed = m_speed.Y - old_speed.Y;
 708                         collision_info->push_back(info);
 709                 }
 710         }
 711 }
 712
 713 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 714 {
 715         move(dtime, map, pos_max_d, NULL);
 716 }
 717
 718 void LocalPlayer::applyControl(float dtime)
 719 {
 720         // Clear stuff
 721         swimming_up = false;
 722
 723         // Random constants
 724         f32 walk_acceleration = 4.0 * BS;
 725         f32 walkspeed_max = 4.0 * BS;
 726
 727         setPitch(control.pitch);
 728         setYaw(control.yaw);
 729
 730         v3f move_direction = v3f(0,0,1);
 731         move_direction.rotateXZBy(getYaw());
 732
 733         v3f speed = v3f(0,0,0);
 734
 735         bool free_move = g_settings->getBool("free_move");
 736         bool fast_move = g_settings->getBool("fast_move");
 737         bool continuous_forward = g_settings->getBool("continuous_forward");
 738
 739         if(free_move || is_climbing)
 740         {
 741                 v3f speed = getSpeed();
 742                 speed.Y = 0;
 743                 setSpeed(speed);
 744         }
 745
 746         // Whether superspeed mode is used or not
 747         bool superspeed = false;
 748
 749         // If free movement and fast movement, always move fast
 750         if(free_move && fast_move)
 751                 superspeed = true;
 752
 753         // Auxiliary button 1 (E)
 754         if(control.aux1)
 755         {
 756                 if(free_move)
 757                 {
 758                         // In free movement mode, aux1 descends
 759                         v3f speed = getSpeed();
 760                         if(fast_move)
 761                                 speed.Y = -20*BS;
 762                         else
 763                                 speed.Y = -walkspeed_max;
 764                         setSpeed(speed);
 765                 }
 766                 else if(is_climbing)
 767                 {
 768                         v3f speed = getSpeed();
 769                         speed.Y = -3*BS;
 770                         setSpeed(speed);
 771                 }
 772                 else
 773                 {
 774                         // If not free movement but fast is allowed, aux1 is
 775                         // "Turbo button"
 776                         if(fast_move)
 777                                 superspeed = true;
 778                 }
 779         }
 780
 781         if(continuous_forward)
 782                 speed += move_direction;
 783
 784         if(control.up)
 785         {
 786                 if(continuous_forward)
 787                         superspeed = true;
 788                 else
 789                         speed += move_direction;
 790         }
 791         if(control.down)
 792         {
 793                 speed -= move_direction;
 794         }
 795         if(control.left)
 796         {
 797                 speed += move_direction.crossProduct(v3f(0,1,0));
 798         }
 799         if(control.right)
 800         {
 801                 speed += move_direction.crossProduct(v3f(0,-1,0));
 802         }
 803         if(control.jump)
 804         {
 805                 if(free_move)
 806                 {
 807                         v3f speed = getSpeed();
 808                         if(fast_move)
 809                                 speed.Y = 20*BS;
 810                         else
 811                                 speed.Y = walkspeed_max;
 812                         setSpeed(speed);
 813                 }
 814                 else if(touching_ground)
 815                 {
 816                         v3f speed = getSpeed();
 817                         /*
 818                                 NOTE: The d value in move() affects jump height by
 819                                 raising the height at which the jump speed is kept
 820                                 at its starting value
 821                         */
 822                         speed.Y = 6.5*BS;
 823                         setSpeed(speed);
 824                 }
 825                 // Use the oscillating value for getting out of water
 826                 // (so that the player doesn't fly on the surface)
 827                 else if(in_water)
 828                 {
 829                         v3f speed = getSpeed();
 830                         speed.Y = 1.5*BS;
 831                         setSpeed(speed);
 832                         swimming_up = true;
 833                 }
 834                 else if(is_climbing)
 835                 {
 836                         v3f speed = getSpeed();
 837                         speed.Y = 3*BS;
 838                         setSpeed(speed);
 839                 }
 840         }
 841
 842         // The speed of the player (Y is ignored)
 843         if(superspeed)
 844                 speed = speed.normalize() * walkspeed_max * 5.0;
 845         else if(control.sneak)
 846                 speed = speed.normalize() * walkspeed_max / 3.0;
 847         else
 848                 speed = speed.normalize() * walkspeed_max;
 849
 850         f32 inc = walk_acceleration * BS * dtime;
 851
 852         // Faster acceleration if fast and free movement
 853         if(free_move && fast_move)
 854                 inc = walk_acceleration * BS * dtime * 10;
 855
 856         // Accelerate to target speed with maximum increment
 857         accelerate(speed, inc);
 858 }
 859 #endif
 860