src/content_sao.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "content_sao.h"
  21 #include "collision.h"
  22 #include "environment.h"
  23 #include "settings.h"
  24 #include "main.h" // For g_profiler
  25 #include "profiler.h"
  26 #include "serialization.h" // For compressZlib
  27 #include "tool.h" // For ToolCapabilities
  28 #include "gamedef.h"
  29
  30 core::map<u16, ServerActiveObject::Factory> ServerActiveObject::m_types;
  31
  32 /*
  33         DummyLoadSAO
  34 */
  35
  36 class DummyLoadSAO : public ServerActiveObject
  37 {
  38 public:
  39         DummyLoadSAO(ServerEnvironment *env, v3f pos, u8 type):
  40                 ServerActiveObject(env, pos)
  41         {
  42                 ServerActiveObject::registerType(type, create);
  43         }
  44         // Pretend to be the test object (to fool the client)
  45         u8 getType() const
  46         { return ACTIVEOBJECT_TYPE_TEST; }
  47         // And never save to disk
  48         bool isStaticAllowed() const
  49         { return false; }
  50
  51         static ServerActiveObject* create(ServerEnvironment *env, v3f pos,
  52                         const std::string &data)
  53         {
  54                 return new DummyLoadSAO(env, pos, 0);
  55         }
  56
  57         void step(float dtime, bool send_recommended)
  58         {
  59                 m_removed = true;
  60                 infostream<<"DummyLoadSAO step"<<std::endl;
  61         }
  62
  63 private:
  64 };
  65
  66 // Prototype (registers item for deserialization)
  67 DummyLoadSAO proto1_DummyLoadSAO(NULL, v3f(0,0,0), ACTIVEOBJECT_TYPE_RAT);
  68 DummyLoadSAO proto2_DummyLoadSAO(NULL, v3f(0,0,0), ACTIVEOBJECT_TYPE_OERKKI1);
  69 DummyLoadSAO proto3_DummyLoadSAO(NULL, v3f(0,0,0), ACTIVEOBJECT_TYPE_FIREFLY);
  70 DummyLoadSAO proto4_DummyLoadSAO(NULL, v3f(0,0,0), ACTIVEOBJECT_TYPE_MOBV2);
  71
  72 /*
  73         TestSAO
  74 */
  75
  76 class TestSAO : public ServerActiveObject
  77 {
  78 public:
  79         TestSAO(ServerEnvironment *env, v3f pos):
  80                 ServerActiveObject(env, pos),
  81                 m_timer1(0),
  82                 m_age(0)
  83         {
  84                 ServerActiveObject::registerType(getType(), create);
  85         }
  86         u8 getType() const
  87         { return ACTIVEOBJECT_TYPE_TEST; }
  88
  89         static ServerActiveObject* create(ServerEnvironment *env, v3f pos,
  90                         const std::string &data)
  91         {
  92                 return new TestSAO(env, pos);
  93         }
  94
  95         void step(float dtime, bool send_recommended)
  96         {
  97                 m_age += dtime;
  98                 if(m_age > 10)
  99                 {
 100                         m_removed = true;
 101                         return;
 102                 }
 103
 104                 m_base_position.Y += dtime * BS * 2;
 105                 if(m_base_position.Y > 8*BS)
 106                         m_base_position.Y = 2*BS;
 107
 108                 if(send_recommended == false)
 109                         return;
 110
 111                 m_timer1 -= dtime;
 112                 if(m_timer1 < 0.0)
 113                 {
 114                         m_timer1 += 0.125;
 115
 116                         std::string data;
 117
 118                         data += itos(0); // 0 = position
 119                         data += " ";
 120                         data += itos(m_base_position.X);
 121                         data += " ";
 122                         data += itos(m_base_position.Y);
 123                         data += " ";
 124                         data += itos(m_base_position.Z);
 125
 126                         ActiveObjectMessage aom(getId(), false, data);
 127                         m_messages_out.push_back(aom);
 128                 }
 129         }
 130
 131 private:
 132         float m_timer1;
 133         float m_age;
 134 };
 135
 136 // Prototype (registers item for deserialization)
 137 TestSAO proto_TestSAO(NULL, v3f(0,0,0));
 138
 139 /*
 140         ItemSAO
 141 */
 142
 143 class ItemSAO : public ServerActiveObject
 144 {
 145 public:
 146         u8 getType() const
 147         { return ACTIVEOBJECT_TYPE_ITEM; }
 148
 149         float getMinimumSavedMovement()
 150         { return 0.1*BS; }
 151
 152         static ServerActiveObject* create(ServerEnvironment *env, v3f pos,
 153                         const std::string &data)
 154         {
 155                 std::istringstream is(data, std::ios::binary);
 156                 char buf[1];
 157                 // read version
 158                 is.read(buf, 1);
 159                 u8 version = buf[0];
 160                 // check if version is supported
 161                 if(version != 0)
 162                         return NULL;
 163                 std::string itemstring = deSerializeString(is);
 164                 infostream<<"create(): Creating item \""
 165                                 <<itemstring<<"\""<<std::endl;
 166                 return new ItemSAO(env, pos, itemstring);
 167         }
 168
 169         ItemSAO(ServerEnvironment *env, v3f pos,
 170                         const std::string itemstring):
 171                 ServerActiveObject(env, pos),
 172                 m_itemstring(itemstring),
 173                 m_itemstring_changed(false),
 174                 m_speed_f(0,0,0),
 175                 m_last_sent_position(0,0,0)
 176         {
 177                 ServerActiveObject::registerType(getType(), create);
 178         }
 179
 180         void step(float dtime, bool send_recommended)
 181         {
 182                 ScopeProfiler sp2(g_profiler, "step avg", SPT_AVG);
 183
 184                 assert(m_env);
 185
 186                 const float interval = 0.2;
 187                 if(m_move_interval.step(dtime, interval)==false)
 188                         return;
 189                 dtime = interval;
 190
 191                 core::aabbox3d<f32> box(-BS/3.,0.0,-BS/3., BS/3.,BS*2./3.,BS/3.);
 192                 collisionMoveResult moveresult;
 193                 // Apply gravity
 194                 m_speed_f += v3f(0, -dtime*9.81*BS, 0);
 195                 // Maximum movement without glitches
 196                 f32 pos_max_d = BS*0.25;
 197                 // Limit speed
 198                 if(m_speed_f.getLength()*dtime > pos_max_d)
 199                         m_speed_f *= pos_max_d / (m_speed_f.getLength()*dtime);
 200                 v3f pos_f = getBasePosition();
 201                 v3f pos_f_old = pos_f;
 202                 IGameDef *gamedef = m_env->getGameDef();
 203                 moveresult = collisionMoveSimple(&m_env->getMap(), gamedef,
 204                                 pos_max_d, box, dtime, pos_f, m_speed_f);
 205
 206                 if(send_recommended == false)
 207                         return;
 208
 209                 if(pos_f.getDistanceFrom(m_last_sent_position) > 0.05*BS)
 210                 {
 211                         setBasePosition(pos_f);
 212                         m_last_sent_position = pos_f;
 213
 214                         std::ostringstream os(std::ios::binary);
 215                         // command (0 = update position)
 216                         writeU8(os, 0);
 217                         // pos
 218                         writeV3F1000(os, m_base_position);
 219                         // create message and add to list
 220                         ActiveObjectMessage aom(getId(), false, os.str());
 221                         m_messages_out.push_back(aom);
 222                 }
 223                 if(m_itemstring_changed)
 224                 {
 225                         m_itemstring_changed = false;
 226
 227                         std::ostringstream os(std::ios::binary);
 228                         // command (1 = update itemstring)
 229                         writeU8(os, 1);
 230                         // itemstring
 231                         os<<serializeString(m_itemstring);
 232                         // create message and add to list
 233                         ActiveObjectMessage aom(getId(), false, os.str());
 234                         m_messages_out.push_back(aom);
 235                 }
 236         }
 237
 238         std::string getClientInitializationData()
 239         {
 240                 std::ostringstream os(std::ios::binary);
 241                 // version
 242                 writeU8(os, 0);
 243                 // pos
 244                 writeV3F1000(os, m_base_position);
 245                 // itemstring
 246                 os<<serializeString(m_itemstring);
 247                 return os.str();
 248         }
 249
 250         std::string getStaticData()
 251         {
 252                 infostream<<__FUNCTION_NAME<<std::endl;
 253                 std::ostringstream os(std::ios::binary);
 254                 // version
 255                 writeU8(os, 0);
 256                 // itemstring
 257                 os<<serializeString(m_itemstring);
 258                 return os.str();
 259         }
 260
 261         ItemStack createItemStack()
 262         {
 263                 try{
 264                         IItemDefManager *idef = m_env->getGameDef()->idef();
 265                         ItemStack item;
 266                         item.deSerialize(m_itemstring, idef);
 267                         infostream<<__FUNCTION_NAME<<": m_itemstring=\""<<m_itemstring
 268                                         <<"\" -> item=\""<<item.getItemString()<<"\""
 269                                         <<std::endl;
 270                         return item;
 271                 }
 272                 catch(SerializationError &e)
 273                 {
 274                         infostream<<__FUNCTION_NAME<<": serialization error: "
 275                                         <<"m_itemstring=\""<<m_itemstring<<"\""<<std::endl;
 276                         return ItemStack();
 277                 }
 278         }
 279
 280         int punch(v3f dir,
 281                         const ToolCapabilities *toolcap,
 282                         ServerActiveObject *puncher,
 283                         float time_from_last_punch)
 284         {
 285                 // Directly delete item in creative mode
 286                 if(g_settings->getBool("creative_mode") == true)
 287                 {
 288                         m_removed = true;
 289                         return 0;
 290                 }
 291
 292                 // Take item into inventory
 293                 ItemStack item = createItemStack();
 294                 Inventory *inv = puncher->getInventory();
 295                 if(inv != NULL)
 296                 {
 297                         std::string wieldlist = puncher->getWieldList();
 298                         ItemStack leftover = inv->addItem(wieldlist, item);
 299                         puncher->setInventoryModified();
 300                         if(leftover.empty())
 301                         {
 302                                 m_removed = true;
 303                         }
 304                         else
 305                         {
 306                                 m_itemstring = leftover.getItemString();
 307                                 m_itemstring_changed = true;
 308                         }
 309                 }
 310
 311                 return 0;
 312         }
 313
 314
 315 private:
 316         std::string m_itemstring;
 317         bool m_itemstring_changed;
 318         v3f m_speed_f;
 319         v3f m_last_sent_position;
 320         IntervalLimiter m_move_interval;
 321 };
 322
 323 // Prototype (registers item for deserialization)
 324 ItemSAO proto_ItemSAO(NULL, v3f(0,0,0), "");
 325
 326 ServerActiveObject* createItemSAO(ServerEnvironment *env, v3f pos,
 327                 const std::string itemstring)
 328 {
 329         return new ItemSAO(env, pos, itemstring);
 330 }
 331
 332 /*
 333         LuaEntitySAO
 334 */
 335
 336 #include "scriptapi.h"
 337 #include "luaentity_common.h"
 338
 339 // Prototype (registers item for deserialization)
 340 LuaEntitySAO proto_LuaEntitySAO(NULL, v3f(0,0,0), "_prototype", "");
 341
 342 LuaEntitySAO::LuaEntitySAO(ServerEnvironment *env, v3f pos,
 343                 const std::string &name, const std::string &state):
 344         ServerActiveObject(env, pos),
 345         m_init_name(name),
 346         m_init_state(state),
 347         m_registered(false),
 348         m_prop(new LuaEntityProperties),
 349         m_hp(-1),
 350         m_velocity(0,0,0),
 351         m_acceleration(0,0,0),
 352         m_yaw(0),
 353         m_last_sent_yaw(0),
 354         m_last_sent_position(0,0,0),
 355         m_last_sent_velocity(0,0,0),
 356         m_last_sent_position_timer(0),
 357         m_last_sent_move_precision(0),
 358         m_armor_groups_sent(false)
 359 {
 360         // Only register type if no environment supplied
 361         if(env == NULL){
 362                 ServerActiveObject::registerType(getType(), create);
 363                 return;
 364         }
 365
 366         // Initialize something to armor groups
 367         m_armor_groups["fleshy"] = 3;
 368         m_armor_groups["snappy"] = 2;
 369 }
 370
 371 LuaEntitySAO::~LuaEntitySAO()
 372 {
 373         if(m_registered){
 374                 lua_State *L = m_env->getLua();
 375                 scriptapi_luaentity_rm(L, m_id);
 376         }
 377         delete m_prop;
 378 }
 379
 380 void LuaEntitySAO::addedToEnvironment()
 381 {
 382         ServerActiveObject::addedToEnvironment();
 383
 384         // Create entity from name and state
 385         lua_State *L = m_env->getLua();
 386         m_registered = scriptapi_luaentity_add(L, m_id, m_init_name.c_str(),
 387                         m_init_state.c_str());
 388
 389         if(m_registered){
 390                 // Get properties
 391                 scriptapi_luaentity_get_properties(L, m_id, m_prop);
 392         }
 393 }
 394
 395 ServerActiveObject* LuaEntitySAO::create(ServerEnvironment *env, v3f pos,
 396                 const std::string &data)
 397 {
 398         std::istringstream is(data, std::ios::binary);
 399         // read version
 400         u8 version = readU8(is);
 401         std::string name;
 402         std::string state;
 403         s16 hp = 1;
 404         v3f velocity;
 405         float yaw = 0;
 406         // check if version is supported
 407         if(version == 0){
 408                 name = deSerializeString(is);
 409                 state = deSerializeLongString(is);
 410         }
 411         else if(version == 1){
 412                 name = deSerializeString(is);
 413                 state = deSerializeLongString(is);
 414                 hp = readS16(is);
 415                 velocity = readV3F1000(is);
 416                 yaw = readF1000(is);
 417         }
 418         else{
 419                 return NULL;
 420         }
 421         // create object
 422         infostream<<"LuaEntitySAO::create(name=\""<<name<<"\" state=\""
 423                         <<state<<"\")"<<std::endl;
 424         LuaEntitySAO *sao = new LuaEntitySAO(env, pos, name, state);
 425         sao->m_hp = hp;
 426         sao->m_velocity = velocity;
 427         sao->m_yaw = yaw;
 428         return sao;
 429 }
 430
 431 void LuaEntitySAO::step(float dtime, bool send_recommended)
 432 {
 433         m_last_sent_position_timer += dtime;
 434
 435         if(m_prop->physical){
 436                 core::aabbox3d<f32> box = m_prop->collisionbox;
 437                 box.MinEdge *= BS;
 438                 box.MaxEdge *= BS;
 439                 collisionMoveResult moveresult;
 440                 f32 pos_max_d = BS*0.25; // Distance per iteration
 441                 v3f p_pos = getBasePosition();
 442                 v3f p_velocity = m_velocity;
 443                 IGameDef *gamedef = m_env->getGameDef();
 444                 moveresult = collisionMovePrecise(&m_env->getMap(), gamedef,
 445                                 pos_max_d, box, dtime, p_pos, p_velocity);
 446                 // Apply results
 447                 setBasePosition(p_pos);
 448                 m_velocity = p_velocity;
 449
 450                 m_velocity += dtime * m_acceleration;
 451         } else {
 452                 m_base_position += dtime * m_velocity + 0.5 * dtime
 453                                 * dtime * m_acceleration;
 454                 m_velocity += dtime * m_acceleration;
 455         }
 456
 457         if(m_registered){
 458                 lua_State *L = m_env->getLua();
 459                 scriptapi_luaentity_step(L, m_id, dtime);
 460         }
 461
 462         if(send_recommended == false)
 463                 return;
 464
 465         // TODO: force send when acceleration changes enough?
 466         float minchange = 0.2*BS;
 467         if(m_last_sent_position_timer > 1.0){
 468                 minchange = 0.01*BS;
 469         } else if(m_last_sent_position_timer > 0.2){
 470                 minchange = 0.05*BS;
 471         }
 472         float move_d = m_base_position.getDistanceFrom(m_last_sent_position);
 473         move_d += m_last_sent_move_precision;
 474         float vel_d = m_velocity.getDistanceFrom(m_last_sent_velocity);
 475         if(move_d > minchange || vel_d > minchange ||
 476                         fabs(m_yaw - m_last_sent_yaw) > 1.0){
 477                 sendPosition(true, false);
 478         }
 479
 480         if(m_armor_groups_sent == false){
 481                 m_armor_groups_sent = true;
 482                 std::ostringstream os(std::ios::binary);
 483                 writeU8(os, LUAENTITY_CMD_UPDATE_ARMOR_GROUPS);
 484                 writeU16(os, m_armor_groups.size());
 485                 for(ItemGroupList::const_iterator i = m_armor_groups.begin();
 486                                 i != m_armor_groups.end(); i++){
 487                         os<<serializeString(i->first);
 488                         writeS16(os, i->second);
 489                 }
 490                 // create message and add to list
 491                 ActiveObjectMessage aom(getId(), true, os.str());
 492                 m_messages_out.push_back(aom);
 493         }
 494 }
 495
 496 std::string LuaEntitySAO::getClientInitializationData()
 497 {
 498         std::ostringstream os(std::ios::binary);
 499         // version
 500         writeU8(os, 1);
 501         // pos
 502         writeV3F1000(os, m_base_position);
 503         // yaw
 504         writeF1000(os, m_yaw);
 505         // hp
 506         writeS16(os, m_hp);
 507         // properties
 508         std::ostringstream prop_os(std::ios::binary);
 509         m_prop->serialize(prop_os);
 510         os<<serializeLongString(prop_os.str());
 511         // return result
 512         return os.str();
 513 }
 514
 515 std::string LuaEntitySAO::getStaticData()
 516 {
 517         infostream<<__FUNCTION_NAME<<std::endl;
 518         std::ostringstream os(std::ios::binary);
 519         // version
 520         writeU8(os, 1);
 521         // name
 522         os<<serializeString(m_init_name);
 523         // state
 524         if(m_registered){
 525                 lua_State *L = m_env->getLua();
 526                 std::string state = scriptapi_luaentity_get_staticdata(L, m_id);
 527                 os<<serializeLongString(state);
 528         } else {
 529                 os<<serializeLongString(m_init_state);
 530         }
 531         // hp
 532         writeS16(os, m_hp);
 533         // velocity
 534         writeV3F1000(os, m_velocity);
 535         // yaw
 536         writeF1000(os, m_yaw);
 537         return os.str();
 538 }
 539
 540 int LuaEntitySAO::punch(v3f dir,
 541                 const ToolCapabilities *toolcap,
 542                 ServerActiveObject *puncher,
 543                 float time_from_last_punch)
 544 {
 545         if(!m_registered){
 546                 // Delete unknown LuaEntities when punched
 547                 m_removed = true;
 548                 return 0;
 549         }
 550
 551         ItemStack *punchitem = NULL;
 552         ItemStack punchitem_static;
 553         if(puncher){
 554                 punchitem_static = puncher->getWieldedItem();
 555                 punchitem = &punchitem_static;
 556         }
 557
 558         PunchDamageResult result = getPunchDamage(
 559                         m_armor_groups,
 560                         toolcap,
 561                         punchitem,
 562                         time_from_last_punch);
 563
 564         if(result.did_punch)
 565         {
 566                 setHP(getHP() - result.damage);
 567
 568                 actionstream<<getDescription()<<" punched by "
 569                                 <<puncher->getDescription()<<", damage "<<result.damage
 570                                 <<" hp, health now "<<getHP()<<" hp"<<std::endl;
 571
 572                 {
 573                         std::ostringstream os(std::ios::binary);
 574                         // command
 575                         writeU8(os, LUAENTITY_CMD_PUNCHED);
 576                         // damage
 577                         writeS16(os, result.damage);
 578                         // result_hp
 579                         writeS16(os, getHP());
 580                         // create message and add to list
 581                         ActiveObjectMessage aom(getId(), true, os.str());
 582                         m_messages_out.push_back(aom);
 583                 }
 584         }
 585
 586         lua_State *L = m_env->getLua();
 587         scriptapi_luaentity_punch(L, m_id, puncher,
 588                         time_from_last_punch, toolcap, dir);
 589
 590         return result.wear;
 591 }
 592
 593 void LuaEntitySAO::rightClick(ServerActiveObject *clicker)
 594 {
 595         if(!m_registered)
 596                 return;
 597         lua_State *L = m_env->getLua();
 598         scriptapi_luaentity_rightclick(L, m_id, clicker);
 599 }
 600
 601 void LuaEntitySAO::setHP(s16 hp)
 602 {
 603         if(hp < 0) hp = 0;
 604         m_hp = hp;
 605 }
 606
 607 s16 LuaEntitySAO::getHP()
 608 {
 609         return m_hp;
 610 }
 611
 612 void LuaEntitySAO::setPos(v3f pos)
 613 {
 614         m_base_position = pos;
 615         sendPosition(false, true);
 616 }
 617
 618 void LuaEntitySAO::moveTo(v3f pos, bool continuous)
 619 {
 620         m_base_position = pos;
 621         if(!continuous)
 622                 sendPosition(true, true);
 623 }
 624
 625 float LuaEntitySAO::getMinimumSavedMovement()
 626 {
 627         return 0.1 * BS;
 628 }
 629
 630 std::string LuaEntitySAO::getDescription()
 631 {
 632         std::ostringstream os(std::ios::binary);
 633         os<<"LuaEntitySAO at (";
 634         os<<(m_base_position.X/BS)<<",";
 635         os<<(m_base_position.Y/BS)<<",";
 636         os<<(m_base_position.Z/BS);
 637         os<<")";
 638         return std::string("LuaEntitySAO");
 639 }
 640
 641 void LuaEntitySAO::setVelocity(v3f velocity)
 642 {
 643         m_velocity = velocity;
 644 }
 645
 646 v3f LuaEntitySAO::getVelocity()
 647 {
 648         return m_velocity;
 649 }
 650
 651 void LuaEntitySAO::setAcceleration(v3f acceleration)
 652 {
 653         m_acceleration = acceleration;
 654 }
 655
 656 v3f LuaEntitySAO::getAcceleration()
 657 {
 658         return m_acceleration;
 659 }
 660
 661 void LuaEntitySAO::setYaw(float yaw)
 662 {
 663         m_yaw = yaw;
 664 }
 665
 666 float LuaEntitySAO::getYaw()
 667 {
 668         return m_yaw;
 669 }
 670
 671 void LuaEntitySAO::setTextureMod(const std::string &mod)
 672 {
 673         std::ostringstream os(std::ios::binary);
 674         // command
 675         writeU8(os, LUAENTITY_CMD_SET_TEXTURE_MOD);
 676         // parameters
 677         os<<serializeString(mod);
 678         // create message and add to list
 679         ActiveObjectMessage aom(getId(), false, os.str());
 680         m_messages_out.push_back(aom);
 681 }
 682
 683 void LuaEntitySAO::setSprite(v2s16 p, int num_frames, float framelength,
 684                 bool select_horiz_by_yawpitch)
 685 {
 686         std::ostringstream os(std::ios::binary);
 687         // command
 688         writeU8(os, LUAENTITY_CMD_SET_SPRITE);
 689         // parameters
 690         writeV2S16(os, p);
 691         writeU16(os, num_frames);
 692         writeF1000(os, framelength);
 693         writeU8(os, select_horiz_by_yawpitch);
 694         // create message and add to list
 695         ActiveObjectMessage aom(getId(), false, os.str());
 696         m_messages_out.push_back(aom);
 697 }
 698
 699 std::string LuaEntitySAO::getName()
 700 {
 701         return m_init_name;
 702 }
 703
 704 void LuaEntitySAO::setArmorGroups(const ItemGroupList &armor_groups)
 705 {
 706         m_armor_groups = armor_groups;
 707         m_armor_groups_sent = false;
 708 }
 709
 710 void LuaEntitySAO::sendPosition(bool do_interpolate, bool is_movement_end)
 711 {
 712         m_last_sent_move_precision = m_base_position.getDistanceFrom(
 713                         m_last_sent_position);
 714         m_last_sent_position_timer = 0;
 715         m_last_sent_yaw = m_yaw;
 716         m_last_sent_position = m_base_position;
 717         m_last_sent_velocity = m_velocity;
 718         //m_last_sent_acceleration = m_acceleration;
 719
 720         float update_interval = m_env->getSendRecommendedInterval();
 721
 722         std::ostringstream os(std::ios::binary);
 723         // command
 724         writeU8(os, LUAENTITY_CMD_UPDATE_POSITION);
 725
 726         // do_interpolate
 727         writeU8(os, do_interpolate);
 728         // pos
 729         writeV3F1000(os, m_base_position);
 730         // velocity
 731         writeV3F1000(os, m_velocity);
 732         // acceleration
 733         writeV3F1000(os, m_acceleration);
 734         // yaw
 735         writeF1000(os, m_yaw);
 736         // is_end_position (for interpolation)
 737         writeU8(os, is_movement_end);
 738         // update_interval (for interpolation)
 739         writeF1000(os, update_interval);
 740
 741         // create message and add to list
 742         ActiveObjectMessage aom(getId(), false, os.str());
 743         m_messages_out.push_back(aom);
 744 }
 745