src/localplayer.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010-2012 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 Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser 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 "localplayer.h"
  21
  22 #include "main.h" // For g_settings
  23 #include "event.h"
  24 #include "collision.h"
  25 #include "gamedef.h"
  26 #include "nodedef.h"
  27 #include "settings.h"
  28 #include "map.h"
  29 #include "util/numeric.h"
  30
  31 /*
  32         LocalPlayer
  33 */
  34
  35 LocalPlayer::LocalPlayer(IGameDef *gamedef):
  36         Player(gamedef),
  37         m_sneak_node(32767,32767,32767),
  38         m_sneak_node_exists(false)
  39 {
  40         // Initialize hp to 0, so that no hearts will be shown if server
  41         // doesn't support health points
  42         hp = 0;
  43 }
  44
  45 LocalPlayer::~LocalPlayer()
  46 {
  47 }
  48
  49 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d,
  50                 core::list<CollisionInfo> *collision_info)
  51 {
  52         INodeDefManager *nodemgr = m_gamedef->ndef();
  53
  54         v3f position = getPosition();
  55         v3f oldpos = position;
  56         v3s16 oldpos_i = floatToInt(oldpos, BS);
  57
  58         v3f old_speed = m_speed;
  59
  60         /*std::cout<<"oldpos_i=("<<oldpos_i.X<<","<<oldpos_i.Y<<","
  61                         <<oldpos_i.Z<<")"<<std::endl;*/
  62
  63         /*
  64                 Calculate new position
  65         */
  66         position += m_speed * dtime;
  67
  68         // Skip collision detection if a special movement mode is used
  69         bool fly_allowed = m_gamedef->checkLocalPrivilege("fly");
  70         bool free_move = fly_allowed && g_settings->getBool("free_move");
  71         if(free_move)
  72         {
  73                 setPosition(position);
  74                 return;
  75         }
  76
  77         /*
  78                 Collision detection
  79         */
  80
  81         // Player position in nodes
  82         v3s16 pos_i = floatToInt(position, BS);
  83
  84         /*
  85                 Check if player is in water (the oscillating value)
  86         */
  87         try{
  88                 // If in water, the threshold of coming out is at higher y
  89                 if(in_water)
  90                 {
  91                         v3s16 pp = floatToInt(position + v3f(0,BS*0.1,0), BS);
  92                         in_water = nodemgr->get(map.getNode(pp).getContent()).isLiquid();
  93                 }
  94                 // If not in water, the threshold of going in is at lower y
  95                 else
  96                 {
  97                         v3s16 pp = floatToInt(position + v3f(0,BS*0.5,0), BS);
  98                         in_water = nodemgr->get(map.getNode(pp).getContent()).isLiquid();
  99                 }
 100         }
 101         catch(InvalidPositionException &e)
 102         {
 103                 in_water = false;
 104         }
 105
 106         /*
 107                 Check if player is in water (the stable value)
 108         */
 109         try{
 110                 v3s16 pp = floatToInt(position + v3f(0,0,0), BS);
 111                 in_water_stable = nodemgr->get(map.getNode(pp).getContent()).isLiquid();
 112         }
 113         catch(InvalidPositionException &e)
 114         {
 115                 in_water_stable = false;
 116         }
 117
 118         /*
 119                 Check if player is climbing
 120         */
 121
 122         try {
 123                 v3s16 pp = floatToInt(position + v3f(0,0.5*BS,0), BS);
 124                 v3s16 pp2 = floatToInt(position + v3f(0,-0.2*BS,0), BS);
 125                 is_climbing = ((nodemgr->get(map.getNode(pp).getContent()).climbable ||
 126                 nodemgr->get(map.getNode(pp2).getContent()).climbable) && !free_move);
 127         }
 128         catch(InvalidPositionException &e)
 129         {
 130                 is_climbing = false;
 131         }
 132
 133         /*
 134                 Collision uncertainty radius
 135                 Make it a bit larger than the maximum distance of movement
 136         */
 137         //f32 d = pos_max_d * 1.1;
 138         // A fairly large value in here makes moving smoother
 139         f32 d = 0.15*BS;
 140
 141         // This should always apply, otherwise there are glitches
 142         assert(d > pos_max_d);
 143
 144         float player_radius = BS*0.30;
 145         float player_height = BS*1.55;
 146
 147         // Maximum distance over border for sneaking
 148         f32 sneak_max = BS*0.4;
 149
 150         /*
 151                 If sneaking, player has larger collision radius to keep from
 152                 falling
 153         */
 154         /*if(control.sneak)
 155                 player_radius = sneak_max + d*1.1;*/
 156
 157         /*
 158                 If sneaking, keep in range from the last walked node and don't
 159                 fall off from it
 160         */
 161         if(control.sneak && m_sneak_node_exists)
 162         {
 163                 f32 maxd = 0.5*BS + sneak_max;
 164                 v3f lwn_f = intToFloat(m_sneak_node, BS);
 165                 position.X = rangelim(position.X, lwn_f.X-maxd, lwn_f.X+maxd);
 166                 position.Z = rangelim(position.Z, lwn_f.Z-maxd, lwn_f.Z+maxd);
 167
 168                 f32 min_y = lwn_f.Y + 0.5*BS;
 169                 if(position.Y < min_y)
 170                 {
 171                         position.Y = min_y;
 172
 173                         //v3f old_speed = m_speed;
 174
 175                         if(m_speed.Y < 0)
 176                                 m_speed.Y = 0;
 177
 178                         /*if(collision_info)
 179                         {
 180                                 // Report fall collision
 181                                 if(old_speed.Y < m_speed.Y - 0.1)
 182                                 {
 183                                         CollisionInfo info;
 184                                         info.t = COLLISION_FALL;
 185                                         info.speed = m_speed.Y - old_speed.Y;
 186                                         collision_info->push_back(info);
 187                                 }
 188                         }*/
 189                 }
 190         }
 191
 192         /*
 193                 Calculate player collision box (new and old)
 194         */
 195         core::aabbox3d<f32> playerbox(
 196                 position.X - player_radius,
 197                 position.Y - 0.0,
 198                 position.Z - player_radius,
 199                 position.X + player_radius,
 200                 position.Y + player_height,
 201                 position.Z + player_radius
 202         );
 203         core::aabbox3d<f32> playerbox_old(
 204                 oldpos.X - player_radius,
 205                 oldpos.Y - 0.0,
 206                 oldpos.Z - player_radius,
 207                 oldpos.X + player_radius,
 208                 oldpos.Y + player_height,
 209                 oldpos.Z + player_radius
 210         );
 211
 212         /*
 213                 If the player's feet touch the topside of any node, this is
 214                 set to true.
 215
 216                 Player is allowed to jump when this is true.
 217         */
 218         bool touching_ground_was = touching_ground;
 219         touching_ground = false;
 220
 221         /*std::cout<<"Checking collisions for ("
 222                         <<oldpos_i.X<<","<<oldpos_i.Y<<","<<oldpos_i.Z
 223                         <<") -> ("
 224                         <<pos_i.X<<","<<pos_i.Y<<","<<pos_i.Z
 225                         <<"):"<<std::endl;*/
 226
 227         bool standing_on_unloaded = false;
 228
 229         /*
 230                 Go through every node around the player
 231         */
 232         for(s16 y = oldpos_i.Y - 1; y <= oldpos_i.Y + 2; y++)
 233         for(s16 z = oldpos_i.Z - 1; z <= oldpos_i.Z + 1; z++)
 234         for(s16 x = oldpos_i.X - 1; x <= oldpos_i.X + 1; x++)
 235         {
 236                 bool is_unloaded = false;
 237                 try{
 238                         // Player collides into walkable nodes
 239                         if(nodemgr->get(map.getNode(v3s16(x,y,z))).walkable == false)
 240                                 continue;
 241                 }
 242                 catch(InvalidPositionException &e)
 243                 {
 244                         is_unloaded = true;
 245                         // Doing nothing here will block the player from
 246                         // walking over map borders
 247                 }
 248
 249                 core::aabbox3d<f32> nodebox = getNodeBox(v3s16(x,y,z), BS);
 250
 251                 /*
 252                         See if the player is touching ground.
 253
 254                         Player touches ground if player's minimum Y is near node's
 255                         maximum Y and player's X-Z-area overlaps with the node's
 256                         X-Z-area.
 257
 258                         Use 0.15*BS so that it is easier to get on a node.
 259                 */
 260                 if(
 261                                 //fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < d
 262                                 fabs(nodebox.MaxEdge.Y-playerbox.MinEdge.Y) < 0.15*BS
 263                                 && nodebox.MaxEdge.X-d > playerbox.MinEdge.X
 264                                 && nodebox.MinEdge.X+d < playerbox.MaxEdge.X
 265                                 && nodebox.MaxEdge.Z-d > playerbox.MinEdge.Z
 266                                 && nodebox.MinEdge.Z+d < playerbox.MaxEdge.Z
 267                 ){
 268                         touching_ground = true;
 269                         if(is_unloaded)
 270                                 standing_on_unloaded = true;
 271                 }
 272
 273                 // If player doesn't intersect with node, ignore node.
 274                 if(playerbox.intersectsWithBox(nodebox) == false)
 275                         continue;
 276
 277                 /*
 278                         Go through every axis
 279                 */
 280                 v3f dirs[3] = {
 281                         v3f(0,0,1), // back-front
 282                         v3f(0,1,0), // top-bottom
 283                         v3f(1,0,0), // right-left
 284                 };
 285                 for(u16 i=0; i<3; i++)
 286                 {
 287                         /*
 288                                 Calculate values along the axis
 289                         */
 290                         f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[i]);
 291                         f32 nodemin = nodebox.MinEdge.dotProduct(dirs[i]);
 292                         f32 playermax = playerbox.MaxEdge.dotProduct(dirs[i]);
 293                         f32 playermin = playerbox.MinEdge.dotProduct(dirs[i]);
 294                         f32 playermax_old = playerbox_old.MaxEdge.dotProduct(dirs[i]);
 295                         f32 playermin_old = playerbox_old.MinEdge.dotProduct(dirs[i]);
 296
 297                         /*
 298                                 Check collision for the axis.
 299                                 Collision happens when player is going through a surface.
 300                         */
 301                         /*f32 neg_d = d;
 302                         f32 pos_d = d;
 303                         // Make it easier to get on top of a node
 304                         if(i == 1)
 305                                 neg_d = 0.15*BS;
 306                         bool negative_axis_collides =
 307                                 (nodemax > playermin && nodemax <= playermin_old + neg_d
 308                                         && m_speed.dotProduct(dirs[i]) < 0);
 309                         bool positive_axis_collides =
 310                                 (nodemin < playermax && nodemin >= playermax_old - pos_d
 311                                         && m_speed.dotProduct(dirs[i]) > 0);*/
 312                         bool negative_axis_collides =
 313                                 (nodemax > playermin && nodemax <= playermin_old + d
 314                                         && m_speed.dotProduct(dirs[i]) < 0);
 315                         bool positive_axis_collides =
 316                                 (nodemin < playermax && nodemin >= playermax_old - d
 317                                         && m_speed.dotProduct(dirs[i]) > 0);
 318                         bool main_axis_collides =
 319                                         negative_axis_collides || positive_axis_collides;
 320
 321                         /*
 322                                 Check overlap of player and node in other axes
 323                         */
 324                         bool other_axes_overlap = true;
 325                         for(u16 j=0; j<3; j++)
 326                         {
 327                                 if(j == i)
 328                                         continue;
 329                                 f32 nodemax = nodebox.MaxEdge.dotProduct(dirs[j]);
 330                                 f32 nodemin = nodebox.MinEdge.dotProduct(dirs[j]);
 331                                 f32 playermax = playerbox.MaxEdge.dotProduct(dirs[j]);
 332                                 f32 playermin = playerbox.MinEdge.dotProduct(dirs[j]);
 333                                 if(!(nodemax - d > playermin && nodemin + d < playermax))
 334                                 {
 335                                         other_axes_overlap = false;
 336                                         break;
 337                                 }
 338                         }
 339
 340                         /*
 341                                 If this is a collision, revert the position in the main
 342                                 direction.
 343                         */
 344                         if(other_axes_overlap && main_axis_collides)
 345                         {
 346                                 //v3f old_speed = m_speed;
 347
 348                                 m_speed -= m_speed.dotProduct(dirs[i]) * dirs[i];
 349                                 position -= position.dotProduct(dirs[i]) * dirs[i];
 350                                 position += oldpos.dotProduct(dirs[i]) * dirs[i];
 351
 352                                 /*if(collision_info)
 353                                 {
 354                                         // Report fall collision
 355                                         if(old_speed.Y < m_speed.Y - 0.1)
 356                                         {
 357                                                 CollisionInfo info;
 358                                                 info.t = COLLISION_FALL;
 359                                                 info.speed = m_speed.Y - old_speed.Y;
 360                                                 collision_info->push_back(info);
 361                                         }
 362                                 }*/
 363                         }
 364
 365                 }
 366         } // xyz
 367
 368         /*
 369                 Check the nodes under the player to see from which node the
 370                 player is sneaking from, if any.
 371         */
 372         {
 373                 v3s16 pos_i_bottom = floatToInt(position - v3f(0,BS/2,0), BS);
 374                 v2f player_p2df(position.X, position.Z);
 375                 f32 min_distance_f = 100000.0*BS;
 376                 // If already seeking from some node, compare to it.
 377                 /*if(m_sneak_node_exists)
 378                 {
 379                         v3f sneaknode_pf = intToFloat(m_sneak_node, BS);
 380                         v2f sneaknode_p2df(sneaknode_pf.X, sneaknode_pf.Z);
 381                         f32 d_horiz_f = player_p2df.getDistanceFrom(sneaknode_p2df);
 382                         f32 d_vert_f = fabs(sneaknode_pf.Y + BS*0.5 - position.Y);
 383                         // Ignore if player is not on the same level (likely dropped)
 384                         if(d_vert_f < 0.15*BS)
 385                                 min_distance_f = d_horiz_f;
 386                 }*/
 387                 v3s16 new_sneak_node = m_sneak_node;
 388                 for(s16 x=-1; x<=1; x++)
 389                 for(s16 z=-1; z<=1; z++)
 390                 {
 391                         v3s16 p = pos_i_bottom + v3s16(x,0,z);
 392                         v3f pf = intToFloat(p, BS);
 393                         v2f node_p2df(pf.X, pf.Z);
 394                         f32 distance_f = player_p2df.getDistanceFrom(node_p2df);
 395                         f32 max_axis_distance_f = MYMAX(
 396                                         fabs(player_p2df.X-node_p2df.X),
 397                                         fabs(player_p2df.Y-node_p2df.Y));
 398
 399                         if(distance_f > min_distance_f ||
 400                                         max_axis_distance_f > 0.5*BS + sneak_max + 0.1*BS)
 401                                 continue;
 402
 403                         try{
 404                                 // The node to be sneaked on has to be walkable
 405                                 if(nodemgr->get(map.getNode(p)).walkable == false)
 406                                         continue;
 407                                 // And the node above it has to be nonwalkable
 408                                 if(nodemgr->get(map.getNode(p+v3s16(0,1,0))).walkable == true)
 409                                         continue;
 410                         }
 411                         catch(InvalidPositionException &e)
 412                         {
 413                                 continue;
 414                         }
 415
 416                         min_distance_f = distance_f;
 417                         new_sneak_node = p;
 418                 }
 419
 420                 bool sneak_node_found = (min_distance_f < 100000.0*BS*0.9);
 421
 422                 if(control.sneak && m_sneak_node_exists)
 423                 {
 424                         if(sneak_node_found)
 425                                 m_sneak_node = new_sneak_node;
 426                 }
 427                 else
 428                 {
 429                         m_sneak_node = new_sneak_node;
 430                         m_sneak_node_exists = sneak_node_found;
 431                 }
 432
 433                 /*
 434                         If sneaking, the player's collision box can be in air, so
 435                         this has to be set explicitly
 436                 */
 437                 if(sneak_node_found && control.sneak)
 438                         touching_ground = true;
 439         }
 440
 441         /*
 442                 Set new position
 443         */
 444         setPosition(position);
 445
 446         /*
 447                 Report collisions
 448         */
 449         if(collision_info)
 450         {
 451                 // Report fall collision
 452                 if(old_speed.Y < m_speed.Y - 0.1 && !standing_on_unloaded)
 453                 {
 454                         CollisionInfo info;
 455                         info.t = COLLISION_FALL;
 456                         info.speed = m_speed.Y - old_speed.Y;
 457                         collision_info->push_back(info);
 458                 }
 459         }
 460
 461         if(!touching_ground_was && touching_ground){
 462                 MtEvent *e = new SimpleTriggerEvent("PlayerRegainGround");
 463                 m_gamedef->event()->put(e);
 464         }
 465
 466         {
 467                 camera_barely_in_ceiling = false;
 468                 v3s16 camera_np = floatToInt(getEyePosition(), BS);
 469                 MapNode n = map.getNodeNoEx(camera_np);
 470                 if(n.getContent() != CONTENT_IGNORE){
 471                         if(nodemgr->get(n).walkable){
 472                                 camera_barely_in_ceiling = true;
 473                         }
 474                 }
 475         }
 476 }
 477
 478 void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d)
 479 {
 480         move(dtime, map, pos_max_d, NULL);
 481 }
 482
 483 void LocalPlayer::applyControl(float dtime)
 484 {
 485         // Clear stuff
 486         swimming_up = false;
 487
 488         // Random constants
 489         f32 walk_acceleration = 4.0 * BS;
 490         f32 walkspeed_max = 4.0 * BS;
 491
 492         setPitch(control.pitch);
 493         setYaw(control.yaw);
 494
 495         v3f move_direction = v3f(0,0,1);
 496         move_direction.rotateXZBy(getYaw());
 497
 498         v3f speed = v3f(0,0,0);
 499
 500         bool fly_allowed = m_gamedef->checkLocalPrivilege("fly");
 501         bool fast_allowed = m_gamedef->checkLocalPrivilege("fast");
 502
 503         bool free_move = fly_allowed && g_settings->getBool("free_move");
 504         bool fast_move = fast_allowed && g_settings->getBool("fast_move");
 505         bool continuous_forward = g_settings->getBool("continuous_forward");
 506
 507         if(free_move || is_climbing)
 508         {
 509                 v3f speed = getSpeed();
 510                 speed.Y = 0;
 511                 setSpeed(speed);
 512         }
 513
 514         // Whether superspeed mode is used or not
 515         bool superspeed = false;
 516
 517         // If free movement and fast movement, always move fast
 518         if(free_move && fast_move)
 519                 superspeed = true;
 520
 521         // Auxiliary button 1 (E)
 522         if(control.aux1)
 523         {
 524                 if(free_move)
 525                 {
 526                         // In free movement mode, aux1 descends
 527                         v3f speed = getSpeed();
 528                         if(fast_move)
 529                                 speed.Y = -20*BS;
 530                         else
 531                                 speed.Y = -walkspeed_max;
 532                         setSpeed(speed);
 533                 }
 534                 else if(is_climbing)
 535                 {
 536                         v3f speed = getSpeed();
 537                         speed.Y = -3*BS;
 538                         setSpeed(speed);
 539                 }
 540                 else
 541                 {
 542                         // If not free movement but fast is allowed, aux1 is
 543                         // "Turbo button"
 544                         if(fast_move)
 545                                 superspeed = true;
 546                 }
 547         }
 548
 549         if(continuous_forward)
 550                 speed += move_direction;
 551
 552         if(control.up)
 553         {
 554                 if(continuous_forward)
 555                         superspeed = true;
 556                 else
 557                         speed += move_direction;
 558         }
 559         if(control.down)
 560         {
 561                 speed -= move_direction;
 562         }
 563         if(control.left)
 564         {
 565                 speed += move_direction.crossProduct(v3f(0,1,0));
 566         }
 567         if(control.right)
 568         {
 569                 speed += move_direction.crossProduct(v3f(0,-1,0));
 570         }
 571         if(control.jump)
 572         {
 573                 if(free_move)
 574                 {
 575                         v3f speed = getSpeed();
 576                         if(fast_move)
 577                                 speed.Y = 20*BS;
 578                         else
 579                                 speed.Y = walkspeed_max;
 580                         setSpeed(speed);
 581                 }
 582                 else if(touching_ground)
 583                 {
 584                         /*
 585                                 NOTE: The d value in move() affects jump height by
 586                                 raising the height at which the jump speed is kept
 587                                 at its starting value
 588                         */
 589                         v3f speed = getSpeed();
 590                         if(speed.Y >= -0.5*BS)
 591                         {
 592                                 speed.Y = 6.5*BS;
 593                                 setSpeed(speed);
 594
 595                                 MtEvent *e = new SimpleTriggerEvent("PlayerJump");
 596                                 m_gamedef->event()->put(e);
 597                         }
 598                 }
 599                 // Use the oscillating value for getting out of water
 600                 // (so that the player doesn't fly on the surface)
 601                 else if(in_water)
 602                 {
 603                         v3f speed = getSpeed();
 604                         speed.Y = 1.5*BS;
 605                         setSpeed(speed);
 606                         swimming_up = true;
 607                 }
 608                 else if(is_climbing)
 609                 {
 610                         v3f speed = getSpeed();
 611                         speed.Y = 3*BS;
 612                         setSpeed(speed);
 613                 }
 614         }
 615
 616         // The speed of the player (Y is ignored)
 617         if(superspeed)
 618                 speed = speed.normalize() * walkspeed_max * 5.0;
 619         else if(control.sneak)
 620                 speed = speed.normalize() * walkspeed_max / 3.0;
 621         else
 622                 speed = speed.normalize() * walkspeed_max;
 623
 624         f32 inc = walk_acceleration * BS * dtime;
 625
 626         // Faster acceleration if fast and free movement
 627         if(free_move && fast_move)
 628                 inc = walk_acceleration * BS * dtime * 10;
 629
 630         // Accelerate to target speed with maximum increment
 631         accelerate(speed, inc);
 632 }
 633
 634 v3s16 LocalPlayer::getStandingNodePos()
 635 {
 636         if(m_sneak_node_exists)
 637                 return m_sneak_node;
 638         return floatToInt(getPosition(), BS);
 639 }
 640