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 "mtevent.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 "shader.h"
  36 #include "content_cao.h"
  37 #include <algorithm>
  38 #include "client/renderingengine.h"
  39
  40 /*
  41         CAOShaderConstantSetter
  42 */
  43
  44 //! Shader constant setter for passing material emissive color to the CAO object_shader
  45 class CAOShaderConstantSetter : public IShaderConstantSetter
  46 {
  47 public:
  48         CAOShaderConstantSetter():
  49                         m_emissive_color_setting("emissiveColor")
  50         {}
  51
  52         ~CAOShaderConstantSetter() override = default;
  53
  54         void onSetConstants(video::IMaterialRendererServices *services) override
  55         {
  56                 // Ambient color
  57                 video::SColorf emissive_color(m_emissive_color);
  58
  59                 float as_array[4] = {
  60                         emissive_color.r,
  61                         emissive_color.g,
  62                         emissive_color.b,
  63                         emissive_color.a,
  64                 };
  65                 m_emissive_color_setting.set(as_array, services);
  66         }
  67
  68         void onSetMaterial(const video::SMaterial& material) override
  69         {
  70                 m_emissive_color = material.EmissiveColor;
  71         }
  72
  73 private:
  74         video::SColor m_emissive_color;
  75         CachedPixelShaderSetting<float, 4> m_emissive_color_setting;
  76 };
  77
  78 class CAOShaderConstantSetterFactory : public IShaderConstantSetterFactory
  79 {
  80 public:
  81         CAOShaderConstantSetterFactory()
  82         {}
  83
  84         virtual IShaderConstantSetter* create()
  85         {
  86                 return new CAOShaderConstantSetter();
  87         }
  88 };
  89
  90 /*
  91         ClientEnvironment
  92 */
  93
  94 ClientEnvironment::ClientEnvironment(ClientMap *map,
  95         ITextureSource *texturesource, Client *client):
  96         Environment(client),
  97         m_map(map),
  98         m_texturesource(texturesource),
  99         m_client(client)
 100 {
 101         auto *shdrsrc = m_client->getShaderSource();
 102         shdrsrc->addShaderConstantSetterFactory(new CAOShaderConstantSetterFactory());
 103 }
 104
 105 ClientEnvironment::~ClientEnvironment()
 106 {
 107         m_ao_manager.clear();
 108
 109         for (auto &simple_object : m_simple_objects) {
 110                 delete simple_object;
 111         }
 112
 113         // Drop/delete map
 114         m_map->drop();
 115
 116         delete m_local_player;
 117 }
 118
 119 Map & ClientEnvironment::getMap()
 120 {
 121         return *m_map;
 122 }
 123
 124 ClientMap & ClientEnvironment::getClientMap()
 125 {
 126         return *m_map;
 127 }
 128
 129 void ClientEnvironment::setLocalPlayer(LocalPlayer *player)
 130 {
 131         /*
 132                 It is a failure if already is a local player
 133         */
 134         FATAL_ERROR_IF(m_local_player != NULL,
 135                 "Local player already allocated");
 136
 137         m_local_player = player;
 138 }
 139
 140 void ClientEnvironment::step(float dtime)
 141 {
 142         /* Step time of day */
 143         stepTimeOfDay(dtime);
 144
 145         // Get some settings
 146         bool fly_allowed = m_client->checkLocalPrivilege("fly");
 147         bool free_move = fly_allowed && g_settings->getBool("free_move");
 148
 149         // Get local player
 150         LocalPlayer *lplayer = getLocalPlayer();
 151         assert(lplayer);
 152         // collision info queue
 153         std::vector<CollisionInfo> player_collisions;
 154
 155         /*
 156                 Get the speed the player is going
 157         */
 158         bool is_climbing = lplayer->is_climbing;
 159
 160         f32 player_speed = lplayer->getSpeed().getLength();
 161
 162         /*
 163                 Maximum position increment
 164         */
 165         //f32 position_max_increment = 0.05*BS;
 166         f32 position_max_increment = 0.1*BS;
 167
 168         // Maximum time increment (for collision detection etc)
 169         // time = distance / speed
 170         f32 dtime_max_increment = 1;
 171         if(player_speed > 0.001)
 172                 dtime_max_increment = position_max_increment / player_speed;
 173
 174         // Maximum time increment is 10ms or lower
 175         if(dtime_max_increment > 0.01)
 176                 dtime_max_increment = 0.01;
 177
 178         // Don't allow overly huge dtime
 179         if(dtime > 0.5)
 180                 dtime = 0.5;
 181
 182         /*
 183                 Stuff that has a maximum time increment
 184         */
 185
 186         u32 steps = ceil(dtime / dtime_max_increment);
 187         f32 dtime_part = dtime / steps;
 188         for (; steps > 0; --steps) {
 189                 /*
 190                         Local player handling
 191                 */
 192
 193                 // Control local player
 194                 lplayer->applyControl(dtime_part, this);
 195
 196                 // Apply physics
 197                 if (!free_move && !is_climbing) {
 198                         // Gravity
 199                         v3f speed = lplayer->getSpeed();
 200                         if (!lplayer->in_liquid)
 201                                 speed.Y -= lplayer->movement_gravity *
 202                                         lplayer->physics_override_gravity * dtime_part * 2.0f;
 203
 204                         // Liquid floating / sinking
 205                         if (lplayer->in_liquid && !lplayer->swimming_vertical &&
 206                                         !lplayer->swimming_pitch)
 207                                 speed.Y -= lplayer->movement_liquid_sink * dtime_part * 2.0f;
 208
 209                         // Liquid resistance
 210                         if (lplayer->in_liquid_stable || lplayer->in_liquid) {
 211                                 // How much the node's viscosity blocks movement, ranges
 212                                 // between 0 and 1. Should match the scale at which viscosity
 213                                 // increase affects other liquid attributes.
 214                                 static const f32 viscosity_factor = 0.3f;
 215
 216                                 v3f d_wanted = -speed / lplayer->movement_liquid_fluidity;
 217                                 f32 dl = d_wanted.getLength();
 218                                 if (dl > lplayer->movement_liquid_fluidity_smooth)
 219                                         dl = lplayer->movement_liquid_fluidity_smooth;
 220
 221                                 dl *= (lplayer->liquid_viscosity * viscosity_factor) +
 222                                         (1 - viscosity_factor);
 223                                 v3f d = d_wanted.normalize() * (dl * dtime_part * 100.0f);
 224                                 speed += d;
 225                         }
 226
 227                         lplayer->setSpeed(speed);
 228                 }
 229
 230                 /*
 231                         Move the lplayer.
 232                         This also does collision detection.
 233                 */
 234                 lplayer->move(dtime_part, this, position_max_increment,
 235                         &player_collisions);
 236         }
 237
 238         bool player_immortal = false;
 239         f32 player_fall_factor = 1.0f;
 240         GenericCAO *playercao = lplayer->getCAO();
 241         if (playercao) {
 242                 player_immortal = playercao->isImmortal();
 243                 int addp_p = itemgroup_get(playercao->getGroups(),
 244                         "fall_damage_add_percent");
 245                 // convert armor group into an usable fall damage factor
 246                 player_fall_factor = 1.0f + (float)addp_p / 100.0f;
 247         }
 248
 249         for (const CollisionInfo &info : player_collisions) {
 250                 v3f speed_diff = info.new_speed - info.old_speed;;
 251                 // Handle only fall damage
 252                 // (because otherwise walking against something in fast_move kills you)
 253                 if (speed_diff.Y < 0 || info.old_speed.Y >= 0)
 254                         continue;
 255                 // Get rid of other components
 256                 speed_diff.X = 0;
 257                 speed_diff.Z = 0;
 258                 f32 pre_factor = 1; // 1 hp per node/s
 259                 f32 tolerance = BS*14; // 5 without damage
 260                 if (info.type == COLLISION_NODE) {
 261                         const ContentFeatures &f = m_client->ndef()->
 262                                 get(m_map->getNode(info.node_p));
 263                         // Determine fall damage modifier
 264                         int addp_n = itemgroup_get(f.groups, "fall_damage_add_percent");
 265                         // convert node group to an usable fall damage factor
 266                         f32 node_fall_factor = 1.0f + (float)addp_n / 100.0f;
 267                         // combine both player fall damage modifiers
 268                         pre_factor = node_fall_factor * player_fall_factor;
 269                 }
 270                 float speed = pre_factor * speed_diff.getLength();
 271
 272                 if (speed > tolerance && !player_immortal && pre_factor > 0.0f) {
 273                         f32 damage_f = (speed - tolerance) / BS;
 274                         u16 damage = (u16)MYMIN(damage_f + 0.5, U16_MAX);
 275                         if (damage != 0) {
 276                                 damageLocalPlayer(damage, true);
 277                                 m_client->getEventManager()->put(
 278                                         new SimpleTriggerEvent(MtEvent::PLAYER_FALLING_DAMAGE));
 279                         }
 280                 }
 281         }
 282
 283         if (m_client->modsLoaded())
 284                 m_script->environment_step(dtime);
 285
 286         // Update lighting on local player (used for wield item)
 287         u32 day_night_ratio = getDayNightRatio();
 288         {
 289                 // Get node at head
 290
 291                 // On InvalidPositionException, use this as default
 292                 // (day: LIGHT_SUN, night: 0)
 293                 MapNode node_at_lplayer(CONTENT_AIR, 0x0f, 0);
 294
 295                 v3s16 p = lplayer->getLightPosition();
 296                 node_at_lplayer = m_map->getNode(p);
 297
 298                 u16 light = getInteriorLight(node_at_lplayer, 0, m_client->ndef());
 299                 final_color_blend(&lplayer->light_color, light, day_night_ratio);
 300         }
 301
 302         /*
 303                 Step active objects and update lighting of them
 304         */
 305
 306         bool update_lighting = m_active_object_light_update_interval.step(dtime, 0.21);
 307         auto cb_state = [this, dtime, update_lighting, day_night_ratio] (ClientActiveObject *cao) {
 308                 // Step object
 309                 cao->step(dtime, this);
 310
 311                 if (update_lighting)
 312                         cao->updateLight(day_night_ratio);
 313         };
 314
 315         m_ao_manager.step(dtime, cb_state);
 316
 317         /*
 318                 Step and handle simple objects
 319         */
 320         g_profiler->avg("ClientEnv: CSO count [#]", m_simple_objects.size());
 321         for (auto i = m_simple_objects.begin(); i != m_simple_objects.end();) {
 322                 ClientSimpleObject *simple = *i;
 323
 324                 simple->step(dtime);
 325                 if(simple->m_to_be_removed) {
 326                         delete simple;
 327                         i = m_simple_objects.erase(i);
 328                 }
 329                 else {
 330                         ++i;
 331                 }
 332         }
 333 }
 334
 335 void ClientEnvironment::addSimpleObject(ClientSimpleObject *simple)
 336 {
 337         m_simple_objects.push_back(simple);
 338 }
 339
 340 GenericCAO* ClientEnvironment::getGenericCAO(u16 id)
 341 {
 342         ClientActiveObject *obj = getActiveObject(id);
 343         if (obj && obj->getType() == ACTIVEOBJECT_TYPE_GENERIC)
 344                 return (GenericCAO*) obj;
 345
 346         return NULL;
 347 }
 348
 349 u16 ClientEnvironment::addActiveObject(ClientActiveObject *object)
 350 {
 351         // Register object. If failed return zero id
 352         if (!m_ao_manager.registerObject(object))
 353                 return 0;
 354
 355         object->addToScene(m_texturesource, m_client->getSceneManager());
 356
 357         // Update lighting immediately
 358         object->updateLight(getDayNightRatio());
 359         return object->getId();
 360 }
 361
 362 void ClientEnvironment::addActiveObject(u16 id, u8 type,
 363         const std::string &init_data)
 364 {
 365         ClientActiveObject* obj =
 366                 ClientActiveObject::create((ActiveObjectType) type, m_client, this);
 367         if(obj == NULL)
 368         {
 369                 infostream<<"ClientEnvironment::addActiveObject(): "
 370                         <<"id="<<id<<" type="<<type<<": Couldn't create object"
 371                         <<std::endl;
 372                 return;
 373         }
 374
 375         obj->setId(id);
 376
 377         try
 378         {
 379                 obj->initialize(init_data);
 380         }
 381         catch(SerializationError &e)
 382         {
 383                 errorstream<<"ClientEnvironment::addActiveObject():"
 384                         <<" id="<<id<<" type="<<type
 385                         <<": SerializationError in initialize(): "
 386                         <<e.what()
 387                         <<": init_data="<<serializeJsonString(init_data)
 388                         <<std::endl;
 389         }
 390
 391         u16 new_id = addActiveObject(obj);
 392         // Object initialized:
 393         if ((obj = getActiveObject(new_id))) {
 394                 // Final step is to update all children which are already known
 395                 // Data provided by AO_CMD_SPAWN_INFANT
 396                 const auto &children = obj->getAttachmentChildIds();
 397                 for (auto c_id : children) {
 398                         if (auto *o = getActiveObject(c_id))
 399                                 o->updateAttachments();
 400                 }
 401         }
 402 }
 403
 404
 405 void ClientEnvironment::removeActiveObject(u16 id)
 406 {
 407         // Get current attachment childs to detach them visually
 408         std::unordered_set<int> attachment_childs;
 409         if (auto *obj = getActiveObject(id))
 410                 attachment_childs = obj->getAttachmentChildIds();
 411
 412         m_ao_manager.removeObject(id);
 413
 414         // Perform a proper detach in Irrlicht
 415         for (auto c_id : attachment_childs) {
 416                 if (ClientActiveObject *child = getActiveObject(c_id))
 417                         child->updateAttachments();
 418         }
 419 }
 420
 421 void ClientEnvironment::processActiveObjectMessage(u16 id, const std::string &data)
 422 {
 423         ClientActiveObject *obj = getActiveObject(id);
 424         if (obj == NULL) {
 425                 infostream << "ClientEnvironment::processActiveObjectMessage():"
 426                         << " got message for id=" << id << ", which doesn't exist."
 427                         << std::endl;
 428                 return;
 429         }
 430
 431         try {
 432                 obj->processMessage(data);
 433         } catch (SerializationError &e) {
 434                 errorstream<<"ClientEnvironment::processActiveObjectMessage():"
 435                         << " id=" << id << " type=" << obj->getType()
 436                         << " SerializationError in processMessage(): " << e.what()
 437                         << std::endl;
 438         }
 439 }
 440
 441 /*
 442         Callbacks for activeobjects
 443 */
 444
 445 void ClientEnvironment::damageLocalPlayer(u16 damage, bool handle_hp)
 446 {
 447         LocalPlayer *lplayer = getLocalPlayer();
 448         assert(lplayer);
 449
 450         if (handle_hp) {
 451                 if (lplayer->hp > damage)
 452                         lplayer->hp -= damage;
 453                 else
 454                         lplayer->hp = 0;
 455         }
 456
 457         ClientEnvEvent event;
 458         event.type = CEE_PLAYER_DAMAGE;
 459         event.player_damage.amount = damage;
 460         event.player_damage.send_to_server = handle_hp;
 461         m_client_event_queue.push(event);
 462 }
 463
 464 /*
 465         Client likes to call these
 466 */
 467
 468 ClientEnvEvent ClientEnvironment::getClientEnvEvent()
 469 {
 470         FATAL_ERROR_IF(m_client_event_queue.empty(),
 471                         "ClientEnvironment::getClientEnvEvent(): queue is empty");
 472
 473         ClientEnvEvent event = m_client_event_queue.front();
 474         m_client_event_queue.pop();
 475         return event;
 476 }
 477
 478 void ClientEnvironment::getSelectedActiveObjects(
 479         const core::line3d<f32> &shootline_on_map,
 480         std::vector<PointedThing> &objects)
 481 {
 482         std::vector<DistanceSortedActiveObject> allObjects;
 483         getActiveObjects(shootline_on_map.start,
 484                 shootline_on_map.getLength() + 10.0f, allObjects);
 485         const v3f line_vector = shootline_on_map.getVector();
 486
 487         for (const auto &allObject : allObjects) {
 488                 ClientActiveObject *obj = allObject.obj;
 489                 aabb3f selection_box;
 490                 if (!obj->getSelectionBox(&selection_box))
 491                         continue;
 492
 493                 const v3f &pos = obj->getPosition();
 494                 aabb3f offsetted_box(selection_box.MinEdge + pos,
 495                         selection_box.MaxEdge + pos);
 496
 497                 v3f current_intersection;
 498                 v3s16 current_normal;
 499                 if (boxLineCollision(offsetted_box, shootline_on_map.start, line_vector,
 500                                 &current_intersection, &current_normal)) {
 501                         objects.emplace_back((s16) obj->getId(), current_intersection, current_normal,
 502                                 (current_intersection - shootline_on_map.start).getLengthSQ());
 503                 }
 504         }
 505 }