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