src/client/clientenvironment.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2017 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 "util/serialize.h"
  21 #include "util/pointedthing.h"
  22 #include "client.h"
  23 #include "clientenvironment.h"
  24 #include "clientsimpleobject.h"
  25 #include "clientmap.h"
  26 #include "scripting_client.h"
  27 #include "mapblock_mesh.h"
  28 #include "event.h"
  29 #include "collision.h"
  30 #include "nodedef.h"
  31 #include "profiler.h"
  32 #include "raycast.h"
  33 #include "voxelalgorithms.h"
  34 #include "settings.h"
  35 #include "content_cao.h"
  36 #include <algorithm>
  37 #include "client/renderingengine.h"
  38
  39 /*
  40         ClientEnvironment
  41 */
  42
  43 ClientEnvironment::ClientEnvironment(ClientMap *map,
  44         ITextureSource *texturesource, Client *client):
  45         Environment(client),
  46         m_map(map),
  47         m_texturesource(texturesource),
  48         m_client(client)
  49 {
  50         char zero = 0;
  51         memset(attachement_parent_ids, zero, sizeof(attachement_parent_ids));
  52 }
  53
  54 ClientEnvironment::~ClientEnvironment()
  55 {
  56         // delete active objects
  57         for (auto &active_object : m_active_objects) {
  58                 delete active_object.second;
  59         }
  60
  61         for (auto &simple_object : m_simple_objects) {
  62                 delete simple_object;
  63         }
  64
  65         // Drop/delete map
  66         m_map->drop();
  67
  68         delete m_local_player;
  69 }
  70
  71 Map & ClientEnvironment::getMap()
  72 {
  73         return *m_map;
  74 }
  75
  76 ClientMap & ClientEnvironment::getClientMap()
  77 {
  78         return *m_map;
  79 }
  80
  81 void ClientEnvironment::setLocalPlayer(LocalPlayer *player)
  82 {
  83         /*
  84                 It is a failure if already is a local player
  85         */
  86         FATAL_ERROR_IF(m_local_player != NULL,
  87                 "Local player already allocated");
  88
  89         m_local_player = player;
  90 }
  91
  92 void ClientEnvironment::step(float dtime)
  93 {
  94         /* Step time of day */
  95         stepTimeOfDay(dtime);
  96
  97         // Get some settings
  98         bool fly_allowed = m_client->checkLocalPrivilege("fly");
  99         bool free_move = fly_allowed && g_settings->getBool("free_move");
 100
 101         // Get local player
 102         LocalPlayer *lplayer = getLocalPlayer();
 103         assert(lplayer);
 104         // collision info queue
 105         std::vector<CollisionInfo> player_collisions;
 106
 107         /*
 108                 Get the speed the player is going
 109         */
 110         bool is_climbing = lplayer->is_climbing;
 111
 112         f32 player_speed = lplayer->getSpeed().getLength();
 113
 114         /*
 115                 Maximum position increment
 116         */
 117         //f32 position_max_increment = 0.05*BS;
 118         f32 position_max_increment = 0.1*BS;
 119
 120         // Maximum time increment (for collision detection etc)
 121         // time = distance / speed
 122         f32 dtime_max_increment = 1;
 123         if(player_speed > 0.001)
 124                 dtime_max_increment = position_max_increment / player_speed;
 125
 126         // Maximum time increment is 10ms or lower
 127         if(dtime_max_increment > 0.01)
 128                 dtime_max_increment = 0.01;
 129
 130         // Don't allow overly huge dtime
 131         if(dtime > 0.5)
 132                 dtime = 0.5;
 133
 134         f32 dtime_downcount = dtime;
 135
 136         /*
 137                 Stuff that has a maximum time increment
 138         */
 139
 140         u32 loopcount = 0;
 141         do
 142         {
 143                 loopcount++;
 144
 145                 f32 dtime_part;
 146                 if(dtime_downcount > dtime_max_increment)
 147                 {
 148                         dtime_part = dtime_max_increment;
 149                         dtime_downcount -= dtime_part;
 150                 }
 151                 else
 152                 {
 153                         dtime_part = dtime_downcount;
 154                         /*
 155                                 Setting this to 0 (no -=dtime_part) disables an infinite loop
 156                                 when dtime_part is so small that dtime_downcount -= dtime_part
 157                                 does nothing
 158                         */
 159                         dtime_downcount = 0;
 160                 }
 161
 162                 /*
 163                         Handle local player
 164                 */
 165
 166                 {
 167                         // Apply physics
 168                         if (!free_move && !is_climbing) {
 169                                 // Gravity
 170                                 v3f speed = lplayer->getSpeed();
 171                                 if (!lplayer->in_liquid)
 172                                         speed.Y -= lplayer->movement_gravity *
 173                                                 lplayer->physics_override_gravity * dtime_part * 2.0f;
 174
 175                                 // Liquid floating / sinking
 176                                 if (lplayer->in_liquid && !lplayer->swimming_vertical)
 177                                         speed.Y -= lplayer->movement_liquid_sink * dtime_part * 2.0f;
 178
 179                                 // Liquid resistance
 180                                 if (lplayer->in_liquid_stable || lplayer->in_liquid) {
 181                                         // How much the node's viscosity blocks movement, ranges
 182                                         // between 0 and 1. Should match the scale at which viscosity
 183                                         // increase affects other liquid attributes.
 184                                         static const f32 viscosity_factor = 0.3f;
 185
 186                                         v3f d_wanted = -speed / lplayer->movement_liquid_fluidity;
 187                                         f32 dl = d_wanted.getLength();
 188                                         if (dl > lplayer->movement_liquid_fluidity_smooth)
 189                                                 dl = lplayer->movement_liquid_fluidity_smooth;
 190
 191                                         dl *= (lplayer->liquid_viscosity * viscosity_factor) +
 192                                                 (1 - viscosity_factor);
 193                                         v3f d = d_wanted.normalize() * (dl * dtime_part * 100.0f);
 194                                         speed += d;
 195                                 }
 196
 197                                 lplayer->setSpeed(speed);
 198                         }
 199
 200                         /*
 201                                 Move the lplayer.
 202                                 This also does collision detection.
 203                         */
 204                         lplayer->move(dtime_part, this, position_max_increment,
 205                                 &player_collisions);
 206                 }
 207         } while (dtime_downcount > 0.001);
 208
 209         bool player_immortal = lplayer->getCAO() && lplayer->getCAO()->isImmortal();
 210
 211         for (const CollisionInfo &info : player_collisions) {
 212                 v3f speed_diff = info.new_speed - info.old_speed;;
 213                 // Handle only fall damage
 214                 // (because otherwise walking against something in fast_move kills you)
 215                 if (speed_diff.Y < 0 || info.old_speed.Y >= 0)
 216                         continue;
 217                 // Get rid of other components
 218                 speed_diff.X = 0;
 219                 speed_diff.Z = 0;
 220                 f32 pre_factor = 1; // 1 hp per node/s
 221                 f32 tolerance = BS*14; // 5 without damage
 222                 f32 post_factor = 1; // 1 hp per node/s
 223                 if (info.type == COLLISION_NODE) {
 224                         const ContentFeatures &f = m_client->ndef()->
 225                                 get(m_map->getNodeNoEx(info.node_p));
 226                         // Determine fall damage multiplier
 227                         int addp = itemgroup_get(f.groups, "fall_damage_add_percent");
 228                         pre_factor = 1.0f + (float)addp / 100.0f;
 229                 }
 230                 float speed = pre_factor * speed_diff.getLength();
 231                 if (speed > tolerance && !player_immortal) {
 232                         f32 damage_f = (speed - tolerance) / BS * post_factor;
 233                         u8 damage = (u8)MYMIN(damage_f + 0.5, 255);
 234                         if (damage != 0) {
 235                                 damageLocalPlayer(damage, true);
 236                                 m_client->getEventManager()->put(
 237                                         new SimpleTriggerEvent(MtEvent::PLAYER_FALLING_DAMAGE));
 238                         }
 239                 }
 240         }
 241
 242         if (m_client->modsLoaded())
 243                 m_script->environment_step(dtime);
 244
 245         // Update lighting on local player (used for wield item)
 246         u32 day_night_ratio = getDayNightRatio();
 247         {
 248                 // Get node at head
 249
 250                 // On InvalidPositionException, use this as default
 251                 // (day: LIGHT_SUN, night: 0)
 252                 MapNode node_at_lplayer(CONTENT_AIR, 0x0f, 0);
 253
 254                 v3s16 p = lplayer->getLightPosition();
 255                 node_at_lplayer = m_map->getNodeNoEx(p);
 256
 257                 u16 light = getInteriorLight(node_at_lplayer, 0, m_client->ndef());
 258                 final_color_blend(&lplayer->light_color, light, day_night_ratio);
 259         }
 260
 261         /*
 262                 Step active objects and update lighting of them
 263         */
 264
 265         g_profiler->avg("CEnv: num of objects", m_active_objects.size());
 266         bool update_lighting = m_active_object_light_update_interval.step(dtime, 0.21);
 267         for (auto &ao_it : m_active_objects) {
 268                 ClientActiveObject* obj = ao_it.second;
 269                 // Step object
 270                 obj->step(dtime, this);
 271
 272                 if (update_lighting) {
 273                         // Update lighting
 274                         u8 light = 0;
 275                         bool pos_ok;
 276
 277                         // Get node at head
 278                         v3s16 p = obj->getLightPosition();
 279                         MapNode n = m_map->getNodeNoEx(p, &pos_ok);
 280                         if (pos_ok)
 281                                 light = n.getLightBlend(day_night_ratio, m_client->ndef());
 282                         else
 283                                 light = blend_light(day_night_ratio, LIGHT_SUN, 0);
 284
 285                         obj->updateLight(light);
 286                 }
 287         }
 288
 289         /*
 290                 Step and handle simple objects
 291         */
 292         g_profiler->avg("CEnv: num of simple objects", m_simple_objects.size());
 293         for (auto i = m_simple_objects.begin(); i != m_simple_objects.end();) {
 294                 auto cur = i;
 295                 ClientSimpleObject *simple = *cur;
 296
 297                 simple->step(dtime);
 298                 if(simple->m_to_be_removed) {
 299                         delete simple;
 300                         i = m_simple_objects.erase(cur);
 301                 }
 302                 else {
 303                         ++i;
 304                 }
 305         }
 306 }
 307
 308 void ClientEnvironment::addSimpleObject(ClientSimpleObject *simple)
 309 {
 310         m_simple_objects.push_back(simple);
 311 }
 312
 313 GenericCAO* ClientEnvironment::getGenericCAO(u16 id)
 314 {
 315         ClientActiveObject *obj = getActiveObject(id);
 316         if (obj && obj->getType() == ACTIVEOBJECT_TYPE_GENERIC)
 317                 return (GenericCAO*) obj;
 318
 319         return NULL;
 320 }
 321
 322 ClientActiveObject* ClientEnvironment::getActiveObject(u16 id)
 323 {
 324         auto n = m_active_objects.find(id);
 325         if (n == m_active_objects.end())
 326                 return NULL;
 327         return n->second;
 328 }
 329
 330 bool isFreeClientActiveObjectId(const u16 id,
 331         ClientActiveObjectMap &objects)
 332 {
 333         return id != 0 && objects.find(id) == objects.end();
 334
 335 }
 336
 337 u16 getFreeClientActiveObjectId(ClientActiveObjectMap &objects)
 338 {
 339         //try to reuse id's as late as possible
 340         static u16 last_used_id = 0;
 341         u16 startid = last_used_id;
 342         for(;;) {
 343                 last_used_id ++;
 344                 if (isFreeClientActiveObjectId(last_used_id, objects))
 345                         return last_used_id;
 346
 347                 if (last_used_id == startid)
 348                         return 0;
 349         }
 350 }
 351
 352 u16 ClientEnvironment::addActiveObject(ClientActiveObject *object)
 353 {
 354         assert(object); // Pre-condition
 355         if(object->getId() == 0)
 356         {
 357                 u16 new_id = getFreeClientActiveObjectId(m_active_objects);
 358                 if(new_id == 0)
 359                 {
 360                         infostream<<"ClientEnvironment::addActiveObject(): "
 361                                 <<"no free ids available"<<std::endl;
 362                         delete object;
 363                         return 0;
 364                 }
 365                 object->setId(new_id);
 366         }
 367         if (!isFreeClientActiveObjectId(object->getId(), m_active_objects)) {
 368                 infostream<<"ClientEnvironment::addActiveObject(): "
 369                         <<"id is not free ("<<object->getId()<<")"<<std::endl;
 370                 delete object;
 371                 return 0;
 372         }
 373         infostream<<"ClientEnvironment::addActiveObject(): "
 374                 <<"added (id="<<object->getId()<<")"<<std::endl;
 375         m_active_objects[object->getId()] = object;
 376         object->addToScene(m_texturesource);
 377         { // Update lighting immediately
 378                 u8 light = 0;
 379                 bool pos_ok;
 380
 381                 // Get node at head
 382                 v3s16 p = object->getLightPosition();
 383                 MapNode n = m_map->getNodeNoEx(p, &pos_ok);
 384                 if (pos_ok)
 385                         light = n.getLightBlend(getDayNightRatio(), m_client->ndef());
 386                 else
 387                         light = blend_light(getDayNightRatio(), LIGHT_SUN, 0);
 388
 389                 object->updateLight(light);
 390         }
 391         return object->getId();
 392 }
 393
 394 void ClientEnvironment::addActiveObject(u16 id, u8 type,
 395         const std::string &init_data)
 396 {
 397         ClientActiveObject* obj =
 398                 ClientActiveObject::create((ActiveObjectType) type, m_client, this);
 399         if(obj == NULL)
 400         {
 401                 infostream<<"ClientEnvironment::addActiveObject(): "
 402                         <<"id="<<id<<" type="<<type<<": Couldn't create object"
 403                         <<std::endl;
 404                 return;
 405         }
 406
 407         obj->setId(id);
 408
 409         try
 410         {
 411                 obj->initialize(init_data);
 412         }
 413         catch(SerializationError &e)
 414         {
 415                 errorstream<<"ClientEnvironment::addActiveObject():"
 416                         <<" id="<<id<<" type="<<type
 417                         <<": SerializationError in initialize(): "
 418                         <<e.what()
 419                         <<": init_data="<<serializeJsonString(init_data)
 420                         <<std::endl;
 421         }
 422
 423         addActiveObject(obj);
 424 }
 425
 426 void ClientEnvironment::removeActiveObject(u16 id)
 427 {
 428         verbosestream<<"ClientEnvironment::removeActiveObject(): "
 429                 <<"id="<<id<<std::endl;
 430         ClientActiveObject* obj = getActiveObject(id);
 431         if (obj == NULL) {
 432                 infostream<<"ClientEnvironment::removeActiveObject(): "
 433                         <<"id="<<id<<" not found"<<std::endl;
 434                 return;
 435         }
 436         obj->removeFromScene(true);
 437         delete obj;
 438         m_active_objects.erase(id);
 439 }
 440
 441 void ClientEnvironment::processActiveObjectMessage(u16 id, const std::string &data)
 442 {
 443         ClientActiveObject *obj = getActiveObject(id);
 444         if (obj == NULL) {
 445                 infostream << "ClientEnvironment::processActiveObjectMessage():"
 446                         << " got message for id=" << id << ", which doesn't exist."
 447                         << std::endl;
 448                 return;
 449         }
 450
 451         try {
 452                 obj->processMessage(data);
 453         } catch (SerializationError &e) {
 454                 errorstream<<"ClientEnvironment::processActiveObjectMessage():"
 455                         << " id=" << id << " type=" << obj->getType()
 456                         << " SerializationError in processMessage(): " << e.what()
 457                         << std::endl;
 458         }
 459 }
 460
 461 /*
 462         Callbacks for activeobjects
 463 */
 464
 465 void ClientEnvironment::damageLocalPlayer(u8 damage, bool handle_hp)
 466 {
 467         LocalPlayer *lplayer = getLocalPlayer();
 468         assert(lplayer);
 469
 470         if (handle_hp) {
 471                 if (lplayer->hp > damage)
 472                         lplayer->hp -= damage;
 473                 else
 474                         lplayer->hp = 0;
 475         }
 476
 477         ClientEnvEvent event;
 478         event.type = CEE_PLAYER_DAMAGE;
 479         event.player_damage.amount = damage;
 480         event.player_damage.send_to_server = handle_hp;
 481         m_client_event_queue.push(event);
 482 }
 483
 484 /*
 485         Client likes to call these
 486 */
 487
 488 void ClientEnvironment::getActiveObjects(v3f origin, f32 max_d,
 489         std::vector<DistanceSortedActiveObject> &dest)
 490 {
 491         for (auto &ao_it : m_active_objects) {
 492                 ClientActiveObject* obj = ao_it.second;
 493
 494                 f32 d = (obj->getPosition() - origin).getLength();
 495
 496                 if (d > max_d)
 497                         continue;
 498
 499                 dest.emplace_back(obj, d);
 500         }
 501 }
 502
 503 ClientEnvEvent ClientEnvironment::getClientEnvEvent()
 504 {
 505         FATAL_ERROR_IF(m_client_event_queue.empty(),
 506                         "ClientEnvironment::getClientEnvEvent(): queue is empty");
 507
 508         ClientEnvEvent event = m_client_event_queue.front();
 509         m_client_event_queue.pop();
 510         return event;
 511 }
 512
 513 void ClientEnvironment::getSelectedActiveObjects(
 514         const core::line3d<f32> &shootline_on_map,
 515         std::vector<PointedThing> &objects)
 516 {
 517         std::vector<DistanceSortedActiveObject> allObjects;
 518         getActiveObjects(shootline_on_map.start,
 519                 shootline_on_map.getLength() + 10.0f, allObjects);
 520         const v3f line_vector = shootline_on_map.getVector();
 521
 522         for (const auto &allObject : allObjects) {
 523                 ClientActiveObject *obj = allObject.obj;
 524                 aabb3f selection_box;
 525                 if (!obj->getSelectionBox(&selection_box))
 526                         continue;
 527
 528                 const v3f &pos = obj->getPosition();
 529                 aabb3f offsetted_box(selection_box.MinEdge + pos,
 530                         selection_box.MaxEdge + pos);
 531
 532                 v3f current_intersection;
 533                 v3s16 current_normal;
 534                 if (boxLineCollision(offsetted_box, shootline_on_map.start, line_vector,
 535                                 &current_intersection, &current_normal)) {
 536                         objects.emplace_back((s16) obj->getId(), current_intersection, current_normal,
 537                                 (current_intersection - shootline_on_map.start).getLengthSQ());
 538                 }
 539         }
 540 }