src/script/lua_api/l_object.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 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 "lua_api/l_object.h"
  21 #include "lua_api/l_internal.h"
  22 #include "lua_api/l_inventory.h"
  23 #include "lua_api/l_item.h"
  24 #include "common/c_converter.h"
  25 #include "common/c_content.h"
  26 #include "log.h"
  27 #include "tool.h"
  28 #include "serverobject.h"
  29 #include "content_sao.h"
  30 #include "server.h"
  31 #include "hud.h"
  32 #include "scripting_game.h"
  33
  34 #define GET_ENV_PTR ServerEnvironment* env =                                   \
  35                                 dynamic_cast<ServerEnvironment*>(getEnv(L));                   \
  36                                 if (env == NULL) return 0
  37
  38 struct EnumString es_HudElementType[] =
  39 {
  40         {HUD_ELEM_IMAGE,     "image"},
  41         {HUD_ELEM_TEXT,      "text"},
  42         {HUD_ELEM_STATBAR,   "statbar"},
  43         {HUD_ELEM_INVENTORY, "inventory"},
  44         {HUD_ELEM_WAYPOINT,  "waypoint"},
  45 {0, NULL},
  46 };
  47
  48 struct EnumString es_HudElementStat[] =
  49 {
  50         {HUD_STAT_POS,    "position"},
  51         {HUD_STAT_POS,    "pos"}, /* Deprecated, only for compatibility's sake */
  52         {HUD_STAT_NAME,   "name"},
  53         {HUD_STAT_SCALE,  "scale"},
  54         {HUD_STAT_TEXT,   "text"},
  55         {HUD_STAT_NUMBER, "number"},
  56         {HUD_STAT_ITEM,   "item"},
  57         {HUD_STAT_DIR,    "direction"},
  58         {HUD_STAT_ALIGN,  "alignment"},
  59         {HUD_STAT_OFFSET, "offset"},
  60         {HUD_STAT_WORLD_POS, "world_pos"},
  61         {0, NULL},
  62 };
  63
  64 struct EnumString es_HudBuiltinElement[] =
  65 {
  66         {HUD_FLAG_HOTBAR_VISIBLE,    "hotbar"},
  67         {HUD_FLAG_HEALTHBAR_VISIBLE, "healthbar"},
  68         {HUD_FLAG_CROSSHAIR_VISIBLE, "crosshair"},
  69         {HUD_FLAG_WIELDITEM_VISIBLE, "wielditem"},
  70         {HUD_FLAG_BREATHBAR_VISIBLE, "breathbar"},
  71         {0, NULL},
  72 };
  73
  74 /*
  75         ObjectRef
  76 */
  77
  78
  79 ObjectRef* ObjectRef::checkobject(lua_State *L, int narg)
  80 {
  81         luaL_checktype(L, narg, LUA_TUSERDATA);
  82         void *ud = luaL_checkudata(L, narg, className);
  83         if(!ud) luaL_typerror(L, narg, className);
  84         return *(ObjectRef**)ud;  // unbox pointer
  85 }
  86
  87 ServerActiveObject* ObjectRef::getobject(ObjectRef *ref)
  88 {
  89         ServerActiveObject *co = ref->m_object;
  90         return co;
  91 }
  92
  93 LuaEntitySAO* ObjectRef::getluaobject(ObjectRef *ref)
  94 {
  95         ServerActiveObject *obj = getobject(ref);
  96         if(obj == NULL)
  97                 return NULL;
  98         if(obj->getType() != ACTIVEOBJECT_TYPE_LUAENTITY)
  99                 return NULL;
 100         return (LuaEntitySAO*)obj;
 101 }
 102
 103 PlayerSAO* ObjectRef::getplayersao(ObjectRef *ref)
 104 {
 105         ServerActiveObject *obj = getobject(ref);
 106         if(obj == NULL)
 107                 return NULL;
 108         if(obj->getType() != ACTIVEOBJECT_TYPE_PLAYER)
 109                 return NULL;
 110         return (PlayerSAO*)obj;
 111 }
 112
 113 Player* ObjectRef::getplayer(ObjectRef *ref)
 114 {
 115         PlayerSAO *playersao = getplayersao(ref);
 116         if(playersao == NULL)
 117                 return NULL;
 118         return playersao->getPlayer();
 119 }
 120
 121 // Exported functions
 122
 123 // garbage collector
 124 int ObjectRef::gc_object(lua_State *L) {
 125         ObjectRef *o = *(ObjectRef **)(lua_touserdata(L, 1));
 126         //infostream<<"ObjectRef::gc_object: o="<<o<<std::endl;
 127         delete o;
 128         return 0;
 129 }
 130
 131 // remove(self)
 132 int ObjectRef::l_remove(lua_State *L)
 133 {
 134         NO_MAP_LOCK_REQUIRED;
 135         ObjectRef *ref = checkobject(L, 1);
 136         ServerActiveObject *co = getobject(ref);
 137         if(co == NULL) return 0;
 138         if(co->getType() == ACTIVEOBJECT_TYPE_PLAYER) return 0;
 139         verbosestream<<"ObjectRef::l_remove(): id="<<co->getId()<<std::endl;
 140         co->m_removed = true;
 141         return 0;
 142 }
 143
 144 // getpos(self)
 145 // returns: {x=num, y=num, z=num}
 146 int ObjectRef::l_getpos(lua_State *L)
 147 {
 148         NO_MAP_LOCK_REQUIRED;
 149         ObjectRef *ref = checkobject(L, 1);
 150         ServerActiveObject *co = getobject(ref);
 151         if(co == NULL) return 0;
 152         v3f pos = co->getBasePosition() / BS;
 153         lua_newtable(L);
 154         lua_pushnumber(L, pos.X);
 155         lua_setfield(L, -2, "x");
 156         lua_pushnumber(L, pos.Y);
 157         lua_setfield(L, -2, "y");
 158         lua_pushnumber(L, pos.Z);
 159         lua_setfield(L, -2, "z");
 160         return 1;
 161 }
 162
 163 // setpos(self, pos)
 164 int ObjectRef::l_setpos(lua_State *L)
 165 {
 166         NO_MAP_LOCK_REQUIRED;
 167         ObjectRef *ref = checkobject(L, 1);
 168         //LuaEntitySAO *co = getluaobject(ref);
 169         ServerActiveObject *co = getobject(ref);
 170         if(co == NULL) return 0;
 171         // pos
 172         v3f pos = checkFloatPos(L, 2);
 173         // Do it
 174         co->setPos(pos);
 175         return 0;
 176 }
 177
 178 // moveto(self, pos, continuous=false)
 179 int ObjectRef::l_moveto(lua_State *L)
 180 {
 181         NO_MAP_LOCK_REQUIRED;
 182         ObjectRef *ref = checkobject(L, 1);
 183         //LuaEntitySAO *co = getluaobject(ref);
 184         ServerActiveObject *co = getobject(ref);
 185         if(co == NULL) return 0;
 186         // pos
 187         v3f pos = checkFloatPos(L, 2);
 188         // continuous
 189         bool continuous = lua_toboolean(L, 3);
 190         // Do it
 191         co->moveTo(pos, continuous);
 192         return 0;
 193 }
 194
 195 // punch(self, puncher, time_from_last_punch, tool_capabilities, dir)
 196 int ObjectRef::l_punch(lua_State *L)
 197 {
 198         NO_MAP_LOCK_REQUIRED;
 199         ObjectRef *ref = checkobject(L, 1);
 200         ObjectRef *puncher_ref = checkobject(L, 2);
 201         ServerActiveObject *co = getobject(ref);
 202         ServerActiveObject *puncher = getobject(puncher_ref);
 203         if(co == NULL) return 0;
 204         if(puncher == NULL) return 0;
 205         v3f dir;
 206         if(lua_type(L, 5) != LUA_TTABLE)
 207                 dir = co->getBasePosition() - puncher->getBasePosition();
 208         else
 209                 dir = read_v3f(L, 5);
 210         float time_from_last_punch = 1000000;
 211         if(lua_isnumber(L, 3))
 212                 time_from_last_punch = lua_tonumber(L, 3);
 213         ToolCapabilities toolcap = read_tool_capabilities(L, 4);
 214         dir.normalize();
 215
 216         s16 src_original_hp = co->getHP();
 217         s16 dst_origin_hp = puncher->getHP();
 218
 219         // Do it
 220         co->punch(dir, &toolcap, puncher, time_from_last_punch);
 221
 222         // If the punched is a player, and its HP changed
 223         if (src_original_hp != co->getHP() &&
 224                         co->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
 225                 getServer(L)->SendPlayerHPOrDie(((PlayerSAO*)co)->getPeerID(),
 226                                 co->getHP() == 0);
 227         }
 228
 229         // If the puncher is a player, and its HP changed
 230         if (dst_origin_hp != puncher->getHP() &&
 231                         puncher->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
 232                 getServer(L)->SendPlayerHPOrDie(((PlayerSAO*)puncher)->getPeerID(),
 233                                 puncher->getHP() == 0);
 234         }
 235         return 0;
 236 }
 237
 238 // right_click(self, clicker); clicker = an another ObjectRef
 239 int ObjectRef::l_right_click(lua_State *L)
 240 {
 241         NO_MAP_LOCK_REQUIRED;
 242         ObjectRef *ref = checkobject(L, 1);
 243         ObjectRef *ref2 = checkobject(L, 2);
 244         ServerActiveObject *co = getobject(ref);
 245         ServerActiveObject *co2 = getobject(ref2);
 246         if(co == NULL) return 0;
 247         if(co2 == NULL) return 0;
 248         // Do it
 249         co->rightClick(co2);
 250         return 0;
 251 }
 252
 253 // set_hp(self, hp)
 254 // hp = number of hitpoints (2 * number of hearts)
 255 // returns: nil
 256 int ObjectRef::l_set_hp(lua_State *L)
 257 {
 258         NO_MAP_LOCK_REQUIRED;
 259         ObjectRef *ref = checkobject(L, 1);
 260         luaL_checknumber(L, 2);
 261         ServerActiveObject *co = getobject(ref);
 262         if(co == NULL) return 0;
 263         int hp = lua_tonumber(L, 2);
 264         /*infostream<<"ObjectRef::l_set_hp(): id="<<co->getId()
 265                         <<" hp="<<hp<<std::endl;*/
 266         // Do it
 267         co->setHP(hp);
 268         if (co->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
 269                 getServer(L)->SendPlayerHPOrDie(((PlayerSAO*)co)->getPeerID(), co->getHP() == 0);
 270         }
 271         // Return
 272         return 0;
 273 }
 274
 275 // get_hp(self)
 276 // returns: number of hitpoints (2 * number of hearts)
 277 // 0 if not applicable to this type of object
 278 int ObjectRef::l_get_hp(lua_State *L)
 279 {
 280         NO_MAP_LOCK_REQUIRED;
 281         ObjectRef *ref = checkobject(L, 1);
 282         ServerActiveObject *co = getobject(ref);
 283         if(co == NULL){
 284                 // Default hp is 1
 285                 lua_pushnumber(L, 1);
 286                 return 1;
 287         }
 288         int hp = co->getHP();
 289         /*infostream<<"ObjectRef::l_get_hp(): id="<<co->getId()
 290                         <<" hp="<<hp<<std::endl;*/
 291         // Return
 292         lua_pushnumber(L, hp);
 293         return 1;
 294 }
 295
 296 // get_inventory(self)
 297 int ObjectRef::l_get_inventory(lua_State *L)
 298 {
 299         NO_MAP_LOCK_REQUIRED;
 300         ObjectRef *ref = checkobject(L, 1);
 301         ServerActiveObject *co = getobject(ref);
 302         if(co == NULL) return 0;
 303         // Do it
 304         InventoryLocation loc = co->getInventoryLocation();
 305         if(getServer(L)->getInventory(loc) != NULL)
 306                 InvRef::create(L, loc);
 307         else
 308                 lua_pushnil(L); // An object may have no inventory (nil)
 309         return 1;
 310 }
 311
 312 // get_wield_list(self)
 313 int ObjectRef::l_get_wield_list(lua_State *L)
 314 {
 315         NO_MAP_LOCK_REQUIRED;
 316         ObjectRef *ref = checkobject(L, 1);
 317         ServerActiveObject *co = getobject(ref);
 318         if(co == NULL) return 0;
 319         // Do it
 320         lua_pushstring(L, co->getWieldList().c_str());
 321         return 1;
 322 }
 323
 324 // get_wield_index(self)
 325 int ObjectRef::l_get_wield_index(lua_State *L)
 326 {
 327         NO_MAP_LOCK_REQUIRED;
 328         ObjectRef *ref = checkobject(L, 1);
 329         ServerActiveObject *co = getobject(ref);
 330         if(co == NULL) return 0;
 331         // Do it
 332         lua_pushinteger(L, co->getWieldIndex() + 1);
 333         return 1;
 334 }
 335
 336 // get_wielded_item(self)
 337 int ObjectRef::l_get_wielded_item(lua_State *L)
 338 {
 339         NO_MAP_LOCK_REQUIRED;
 340         ObjectRef *ref = checkobject(L, 1);
 341         ServerActiveObject *co = getobject(ref);
 342         if(co == NULL){
 343                 // Empty ItemStack
 344                 LuaItemStack::create(L, ItemStack());
 345                 return 1;
 346         }
 347         // Do it
 348         LuaItemStack::create(L, co->getWieldedItem());
 349         return 1;
 350 }
 351
 352 // set_wielded_item(self, itemstack or itemstring or table or nil)
 353 int ObjectRef::l_set_wielded_item(lua_State *L)
 354 {
 355         NO_MAP_LOCK_REQUIRED;
 356         ObjectRef *ref = checkobject(L, 1);
 357         ServerActiveObject *co = getobject(ref);
 358         if(co == NULL) return 0;
 359         // Do it
 360         ItemStack item = read_item(L, 2, getServer(L));
 361         bool success = co->setWieldedItem(item);
 362         if (success && co->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
 363                 getServer(L)->SendInventory(((PlayerSAO*)co));
 364         }
 365         lua_pushboolean(L, success);
 366         return 1;
 367 }
 368
 369 // set_armor_groups(self, groups)
 370 int ObjectRef::l_set_armor_groups(lua_State *L)
 371 {
 372         NO_MAP_LOCK_REQUIRED;
 373         ObjectRef *ref = checkobject(L, 1);
 374         ServerActiveObject *co = getobject(ref);
 375         if(co == NULL) return 0;
 376         // Do it
 377         ItemGroupList groups;
 378         read_groups(L, 2, groups);
 379         co->setArmorGroups(groups);
 380         return 0;
 381 }
 382
 383 // get_armor_groups(self)
 384 int ObjectRef::l_get_armor_groups(lua_State *L)
 385 {
 386         NO_MAP_LOCK_REQUIRED;
 387         ObjectRef *ref = checkobject(L, 1);
 388         ServerActiveObject *co = getobject(ref);
 389         if (co == NULL)
 390                 return 0;
 391         // Do it
 392         ItemGroupList groups = co->getArmorGroups();
 393         push_groups(L, groups);
 394         return 1;
 395 }
 396
 397 // set_physics_override(self, physics_override_speed, physics_override_jump,
 398 //                      physics_override_gravity, sneak, sneak_glitch)
 399 int ObjectRef::l_set_physics_override(lua_State *L)
 400 {
 401         ObjectRef *ref = checkobject(L, 1);
 402         PlayerSAO *co = (PlayerSAO *) getobject(ref);
 403         if(co == NULL) return 0;
 404         // Do it
 405         if (lua_istable(L, 2)) {
 406                 co->m_physics_override_speed = getfloatfield_default(L, 2, "speed", co->m_physics_override_speed);
 407                 co->m_physics_override_jump = getfloatfield_default(L, 2, "jump", co->m_physics_override_jump);
 408                 co->m_physics_override_gravity = getfloatfield_default(L, 2, "gravity", co->m_physics_override_gravity);
 409                 co->m_physics_override_sneak = getboolfield_default(L, 2, "sneak", co->m_physics_override_sneak);
 410                 co->m_physics_override_sneak_glitch = getboolfield_default(L, 2, "sneak_glitch", co->m_physics_override_sneak_glitch);
 411                 co->m_physics_override_sent = false;
 412         } else {
 413                 // old, non-table format
 414                 if(!lua_isnil(L, 2)){
 415                         co->m_physics_override_speed = lua_tonumber(L, 2);
 416                         co->m_physics_override_sent = false;
 417                 }
 418                 if(!lua_isnil(L, 3)){
 419                         co->m_physics_override_jump = lua_tonumber(L, 3);
 420                         co->m_physics_override_sent = false;
 421                 }
 422                 if(!lua_isnil(L, 4)){
 423                         co->m_physics_override_gravity = lua_tonumber(L, 4);
 424                         co->m_physics_override_sent = false;
 425                 }
 426         }
 427         return 0;
 428 }
 429
 430 // get_physics_override(self)
 431 int ObjectRef::l_get_physics_override(lua_State *L)
 432 {
 433         ObjectRef *ref = checkobject(L, 1);
 434         PlayerSAO *co = (PlayerSAO *)getobject(ref);
 435         if (co == NULL)
 436                 return 0;
 437         // Do it
 438         lua_newtable(L);
 439         lua_pushnumber(L, co->m_physics_override_speed);
 440         lua_setfield(L, -2, "speed");
 441         lua_pushnumber(L, co->m_physics_override_jump);
 442         lua_setfield(L, -2, "jump");
 443         lua_pushnumber(L, co->m_physics_override_gravity);
 444         lua_setfield(L, -2, "gravity");
 445         lua_pushboolean(L, co->m_physics_override_sneak);
 446         lua_setfield(L, -2, "sneak");
 447         lua_pushboolean(L, co->m_physics_override_sneak_glitch);
 448         lua_setfield(L, -2, "sneak_glitch");
 449         return 1;
 450 }
 451
 452 // set_animation(self, frame_range, frame_speed, frame_blend)
 453 int ObjectRef::l_set_animation(lua_State *L)
 454 {
 455         NO_MAP_LOCK_REQUIRED;
 456         ObjectRef *ref = checkobject(L, 1);
 457         ServerActiveObject *co = getobject(ref);
 458         if(co == NULL) return 0;
 459         // Do it
 460         v2f frames = v2f(1, 1);
 461         if(!lua_isnil(L, 2))
 462                 frames = read_v2f(L, 2);
 463         float frame_speed = 15;
 464         if(!lua_isnil(L, 3))
 465                 frame_speed = lua_tonumber(L, 3);
 466         float frame_blend = 0;
 467         if(!lua_isnil(L, 4))
 468                 frame_blend = lua_tonumber(L, 4);
 469         co->setAnimation(frames, frame_speed, frame_blend);
 470         return 0;
 471 }
 472
 473 // get_animation(self)
 474 int ObjectRef::l_get_animation(lua_State *L)
 475 {
 476         NO_MAP_LOCK_REQUIRED;
 477         ObjectRef *ref = checkobject(L, 1);
 478         ServerActiveObject *co = getobject(ref);
 479         if (co == NULL)
 480                 return 0;
 481         // Do it
 482         v2f frames = v2f(1,1);
 483         float frame_speed = 15;
 484         float frame_blend = 0;
 485         co->getAnimation(&frames, &frame_speed, &frame_blend);
 486
 487         push_v2f(L, frames);
 488         lua_pushnumber(L, frame_speed);
 489         lua_pushnumber(L, frame_blend);
 490         return 3;
 491 }
 492
 493 // set_local_animation(self, {stand/idle}, {walk}, {dig}, {walk+dig}, frame_speed)
 494 int ObjectRef::l_set_local_animation(lua_State *L)
 495 {
 496         //NO_MAP_LOCK_REQUIRED;
 497         ObjectRef *ref = checkobject(L, 1);
 498         Player *player = getplayer(ref);
 499         if (player == NULL)
 500                 return 0;
 501         // Do it
 502         v2s32 frames[4];
 503         for (int i=0;i<4;i++) {
 504                 if(!lua_isnil(L, 2+1))
 505                         frames[i] = read_v2s32(L, 2+i);
 506         }
 507         float frame_speed = 30;
 508         if(!lua_isnil(L, 6))
 509                 frame_speed = lua_tonumber(L, 6);
 510
 511         if (!getServer(L)->setLocalPlayerAnimations(player, frames, frame_speed))
 512                 return 0;
 513
 514         lua_pushboolean(L, true);
 515         return 0;
 516 }
 517
 518 // get_local_animation(self)
 519 int ObjectRef::l_get_local_animation(lua_State *L)
 520 {
 521         //NO_MAP_LOCK_REQUIRED
 522         ObjectRef *ref = checkobject(L, 1);
 523         Player *player = getplayer(ref);
 524         if (player == NULL)
 525                 return 0;
 526
 527         v2s32 frames[4];
 528         float frame_speed;
 529         player->getLocalAnimations(frames, &frame_speed);
 530
 531         for (int i = 0; i < 4; i++) {
 532                 push_v2s32(L, frames[i]);
 533         }
 534
 535         lua_pushnumber(L, frame_speed);
 536         return 5;
 537 }
 538
 539 // set_eye_offset(self, v3f first pv, v3f third pv)
 540 int ObjectRef::l_set_eye_offset(lua_State *L)
 541 {
 542         //NO_MAP_LOCK_REQUIRED;
 543         ObjectRef *ref = checkobject(L, 1);
 544         Player *player = getplayer(ref);
 545         if (player == NULL)
 546                 return 0;
 547         // Do it
 548         v3f offset_first = v3f(0, 0, 0);
 549         v3f offset_third = v3f(0, 0, 0);
 550
 551         if(!lua_isnil(L, 2))
 552                 offset_first = read_v3f(L, 2);
 553         if(!lua_isnil(L, 3))
 554                 offset_third = read_v3f(L, 3);
 555
 556         // Prevent abuse of offset values (keep player always visible)
 557         offset_third.X = rangelim(offset_third.X,-10,10);
 558         offset_third.Z = rangelim(offset_third.Z,-5,5);
 559         /* TODO: if possible: improve the camera colision detetion to allow Y <= -1.5) */
 560         offset_third.Y = rangelim(offset_third.Y,-10,15); //1.5*BS
 561
 562         if (!getServer(L)->setPlayerEyeOffset(player, offset_first, offset_third))
 563                 return 0;
 564
 565         lua_pushboolean(L, true);
 566         return 0;
 567 }
 568
 569 // get_eye_offset(self)
 570 int ObjectRef::l_get_eye_offset(lua_State *L)
 571 {
 572         //NO_MAP_LOCK_REQUIRED;
 573         ObjectRef *ref = checkobject(L, 1);
 574         Player *player = getplayer(ref);
 575         if (player == NULL)
 576                 return 0;
 577         // Do it
 578         push_v3f(L, player->eye_offset_first);
 579         push_v3f(L, player->eye_offset_third);
 580         return 2;
 581 }
 582
 583 // set_bone_position(self, std::string bone, v3f position, v3f rotation)
 584 int ObjectRef::l_set_bone_position(lua_State *L)
 585 {
 586         NO_MAP_LOCK_REQUIRED;
 587         ObjectRef *ref = checkobject(L, 1);
 588         ServerActiveObject *co = getobject(ref);
 589         if(co == NULL) return 0;
 590         // Do it
 591         std::string bone = "";
 592         if(!lua_isnil(L, 2))
 593                 bone = lua_tostring(L, 2);
 594         v3f position = v3f(0, 0, 0);
 595         if(!lua_isnil(L, 3))
 596                 position = read_v3f(L, 3);
 597         v3f rotation = v3f(0, 0, 0);
 598         if(!lua_isnil(L, 4))
 599                 rotation = read_v3f(L, 4);
 600         co->setBonePosition(bone, position, rotation);
 601         return 0;
 602 }
 603
 604 // get_bone_position(self, bone)
 605 int ObjectRef::l_get_bone_position(lua_State *L)
 606 {
 607         NO_MAP_LOCK_REQUIRED;
 608         ObjectRef *ref = checkobject(L, 1);
 609         ServerActiveObject *co = getobject(ref);
 610         if (co == NULL)
 611                 return 0;
 612         // Do it
 613         std::string bone = "";
 614         if(!lua_isnil(L, 2))
 615                 bone = lua_tostring(L, 2);
 616
 617         v3f position = v3f(0, 0, 0);
 618         v3f rotation = v3f(0, 0, 0);
 619         co->getBonePosition(bone, &position, &rotation);
 620
 621         push_v3f(L, position);
 622         push_v3f(L, rotation);
 623         return 2;
 624 }
 625
 626 // set_attach(self, parent, bone, position, rotation)
 627 int ObjectRef::l_set_attach(lua_State *L)
 628 {
 629         NO_MAP_LOCK_REQUIRED;
 630         ObjectRef *ref = checkobject(L, 1);
 631         ObjectRef *parent_ref = checkobject(L, 2);
 632         ServerActiveObject *co = getobject(ref);
 633         ServerActiveObject *parent = getobject(parent_ref);
 634         if(co == NULL) return 0;
 635         if(parent == NULL) return 0;
 636         // Do it
 637         std::string bone = "";
 638         if(!lua_isnil(L, 3))
 639                 bone = lua_tostring(L, 3);
 640         v3f position = v3f(0, 0, 0);
 641         if(!lua_isnil(L, 4))
 642                 position = read_v3f(L, 4);
 643         v3f rotation = v3f(0, 0, 0);
 644         if(!lua_isnil(L, 5))
 645                 rotation = read_v3f(L, 5);
 646         co->setAttachment(parent->getId(), bone, position, rotation);
 647         return 0;
 648 }
 649
 650 // get_attach(self)
 651 int ObjectRef::l_get_attach(lua_State *L)
 652 {
 653         NO_MAP_LOCK_REQUIRED;
 654         GET_ENV_PTR;
 655
 656         ObjectRef *ref = checkobject(L, 1);
 657         ServerActiveObject *co = getobject(ref);
 658         if (co == NULL)
 659                 return 0;
 660
 661         // Do it
 662         int parent_id = 0;
 663         std::string bone = "";
 664         v3f position = v3f(0, 0, 0);
 665         v3f rotation = v3f(0, 0, 0);
 666         co->getAttachment(&parent_id, &bone, &position, &rotation);
 667         if (!parent_id)
 668                 return 0;
 669         ServerActiveObject *parent = env->getActiveObject(parent_id);
 670
 671         getScriptApiBase(L)->objectrefGetOrCreate(L, parent);
 672         lua_pushlstring(L, bone.c_str(), bone.size());
 673         push_v3f(L, position);
 674         push_v3f(L, rotation);
 675         return 4;
 676 }
 677
 678 // set_detach(self)
 679 int ObjectRef::l_set_detach(lua_State *L)
 680 {
 681         NO_MAP_LOCK_REQUIRED;
 682         ObjectRef *ref = checkobject(L, 1);
 683         ServerActiveObject *co = getobject(ref);
 684         if(co == NULL) return 0;
 685         // Do it
 686         co->setAttachment(0, "", v3f(0,0,0), v3f(0,0,0));
 687         return 0;
 688 }
 689
 690 // set_properties(self, properties)
 691 int ObjectRef::l_set_properties(lua_State *L)
 692 {
 693         NO_MAP_LOCK_REQUIRED;
 694         ObjectRef *ref = checkobject(L, 1);
 695         ServerActiveObject *co = getobject(ref);
 696         if(co == NULL) return 0;
 697         ObjectProperties *prop = co->accessObjectProperties();
 698         if(!prop)
 699                 return 0;
 700         read_object_properties(L, 2, prop);
 701         co->notifyObjectPropertiesModified();
 702         return 0;
 703 }
 704
 705 // get_properties(self)
 706 int ObjectRef::l_get_properties(lua_State *L)
 707 {
 708         NO_MAP_LOCK_REQUIRED;
 709         ObjectRef *ref = checkobject(L, 1);
 710         ServerActiveObject *co = getobject(ref);
 711         if (co == NULL)
 712                 return 0;
 713         ObjectProperties *prop = co->accessObjectProperties();
 714         if (!prop)
 715                 return 0;
 716         push_object_properties(L, prop);
 717         return 1;
 718 }
 719
 720 // is_player(self)
 721 int ObjectRef::l_is_player(lua_State *L)
 722 {
 723         NO_MAP_LOCK_REQUIRED;
 724         ObjectRef *ref = checkobject(L, 1);
 725         Player *player = getplayer(ref);
 726         lua_pushboolean(L, (player != NULL));
 727         return 1;
 728 }
 729
 730 /* LuaEntitySAO-only */
 731
 732 // setvelocity(self, {x=num, y=num, z=num})
 733 int ObjectRef::l_setvelocity(lua_State *L)
 734 {
 735         NO_MAP_LOCK_REQUIRED;
 736         ObjectRef *ref = checkobject(L, 1);
 737         LuaEntitySAO *co = getluaobject(ref);
 738         if(co == NULL) return 0;
 739         v3f pos = checkFloatPos(L, 2);
 740         // Do it
 741         co->setVelocity(pos);
 742         return 0;
 743 }
 744
 745 // getvelocity(self)
 746 int ObjectRef::l_getvelocity(lua_State *L)
 747 {
 748         NO_MAP_LOCK_REQUIRED;
 749         ObjectRef *ref = checkobject(L, 1);
 750         LuaEntitySAO *co = getluaobject(ref);
 751         if(co == NULL) return 0;
 752         // Do it
 753         v3f v = co->getVelocity();
 754         pushFloatPos(L, v);
 755         return 1;
 756 }
 757
 758 // setacceleration(self, {x=num, y=num, z=num})
 759 int ObjectRef::l_setacceleration(lua_State *L)
 760 {
 761         NO_MAP_LOCK_REQUIRED;
 762         ObjectRef *ref = checkobject(L, 1);
 763         LuaEntitySAO *co = getluaobject(ref);
 764         if(co == NULL) return 0;
 765         // pos
 766         v3f pos = checkFloatPos(L, 2);
 767         // Do it
 768         co->setAcceleration(pos);
 769         return 0;
 770 }
 771
 772 // getacceleration(self)
 773 int ObjectRef::l_getacceleration(lua_State *L)
 774 {
 775         NO_MAP_LOCK_REQUIRED;
 776         ObjectRef *ref = checkobject(L, 1);
 777         LuaEntitySAO *co = getluaobject(ref);
 778         if(co == NULL) return 0;
 779         // Do it
 780         v3f v = co->getAcceleration();
 781         pushFloatPos(L, v);
 782         return 1;
 783 }
 784
 785 // setyaw(self, radians)
 786 int ObjectRef::l_setyaw(lua_State *L)
 787 {
 788         NO_MAP_LOCK_REQUIRED;
 789         ObjectRef *ref = checkobject(L, 1);
 790         LuaEntitySAO *co = getluaobject(ref);
 791         if(co == NULL) return 0;
 792         float yaw = luaL_checknumber(L, 2) * core::RADTODEG;
 793         // Do it
 794         co->setYaw(yaw);
 795         return 0;
 796 }
 797
 798 // getyaw(self)
 799 int ObjectRef::l_getyaw(lua_State *L)
 800 {
 801         NO_MAP_LOCK_REQUIRED;
 802         ObjectRef *ref = checkobject(L, 1);
 803         LuaEntitySAO *co = getluaobject(ref);
 804         if(co == NULL) return 0;
 805         // Do it
 806         float yaw = co->getYaw() * core::DEGTORAD;
 807         lua_pushnumber(L, yaw);
 808         return 1;
 809 }
 810
 811 // settexturemod(self, mod)
 812 int ObjectRef::l_settexturemod(lua_State *L)
 813 {
 814         NO_MAP_LOCK_REQUIRED;
 815         ObjectRef *ref = checkobject(L, 1);
 816         LuaEntitySAO *co = getluaobject(ref);
 817         if(co == NULL) return 0;
 818         // Do it
 819         std::string mod = luaL_checkstring(L, 2);
 820         co->setTextureMod(mod);
 821         return 0;
 822 }
 823
 824 // setsprite(self, p={x=0,y=0}, num_frames=1, framelength=0.2,
 825 //           select_horiz_by_yawpitch=false)
 826 int ObjectRef::l_setsprite(lua_State *L)
 827 {
 828         NO_MAP_LOCK_REQUIRED;
 829         ObjectRef *ref = checkobject(L, 1);
 830         LuaEntitySAO *co = getluaobject(ref);
 831         if(co == NULL) return 0;
 832         // Do it
 833         v2s16 p(0,0);
 834         if(!lua_isnil(L, 2))
 835                 p = read_v2s16(L, 2);
 836         int num_frames = 1;
 837         if(!lua_isnil(L, 3))
 838                 num_frames = lua_tonumber(L, 3);
 839         float framelength = 0.2;
 840         if(!lua_isnil(L, 4))
 841                 framelength = lua_tonumber(L, 4);
 842         bool select_horiz_by_yawpitch = false;
 843         if(!lua_isnil(L, 5))
 844                 select_horiz_by_yawpitch = lua_toboolean(L, 5);
 845         co->setSprite(p, num_frames, framelength, select_horiz_by_yawpitch);
 846         return 0;
 847 }
 848
 849 // DEPRECATED
 850 // get_entity_name(self)
 851 int ObjectRef::l_get_entity_name(lua_State *L)
 852 {
 853         NO_MAP_LOCK_REQUIRED;
 854         ObjectRef *ref = checkobject(L, 1);
 855         LuaEntitySAO *co = getluaobject(ref);
 856         log_deprecated(L,"Deprecated call to \"get_entity_name");
 857         if(co == NULL) return 0;
 858         // Do it
 859         std::string name = co->getName();
 860         lua_pushstring(L, name.c_str());
 861         return 1;
 862 }
 863
 864 // get_luaentity(self)
 865 int ObjectRef::l_get_luaentity(lua_State *L)
 866 {
 867         NO_MAP_LOCK_REQUIRED;
 868         ObjectRef *ref = checkobject(L, 1);
 869         LuaEntitySAO *co = getluaobject(ref);
 870         if(co == NULL) return 0;
 871         // Do it
 872         luaentity_get(L, co->getId());
 873         return 1;
 874 }
 875
 876 /* Player-only */
 877
 878 // is_player_connected(self)
 879 int ObjectRef::l_is_player_connected(lua_State *L)
 880 {
 881         NO_MAP_LOCK_REQUIRED;
 882         ObjectRef *ref = checkobject(L, 1);
 883         Player *player = getplayer(ref);
 884         lua_pushboolean(L, (player != NULL && player->peer_id != 0));
 885         return 1;
 886 }
 887
 888 // get_player_name(self)
 889 int ObjectRef::l_get_player_name(lua_State *L)
 890 {
 891         NO_MAP_LOCK_REQUIRED;
 892         ObjectRef *ref = checkobject(L, 1);
 893         Player *player = getplayer(ref);
 894         if(player == NULL){
 895                 lua_pushlstring(L, "", 0);
 896                 return 1;
 897         }
 898         // Do it
 899         lua_pushstring(L, player->getName());
 900         return 1;
 901 }
 902
 903 // get_look_dir(self)
 904 int ObjectRef::l_get_look_dir(lua_State *L)
 905 {
 906         NO_MAP_LOCK_REQUIRED;
 907         ObjectRef *ref = checkobject(L, 1);
 908         Player *player = getplayer(ref);
 909         if(player == NULL) return 0;
 910         // Do it
 911         float pitch = player->getRadPitch();
 912         float yaw = player->getRadYaw();
 913         v3f v(cos(pitch)*cos(yaw), sin(pitch), cos(pitch)*sin(yaw));
 914         push_v3f(L, v);
 915         return 1;
 916 }
 917
 918 // get_look_pitch(self)
 919 int ObjectRef::l_get_look_pitch(lua_State *L)
 920 {
 921         NO_MAP_LOCK_REQUIRED;
 922         ObjectRef *ref = checkobject(L, 1);
 923         Player *player = getplayer(ref);
 924         if(player == NULL) return 0;
 925         // Do it
 926         lua_pushnumber(L, player->getRadPitch());
 927         return 1;
 928 }
 929
 930 // get_look_yaw(self)
 931 int ObjectRef::l_get_look_yaw(lua_State *L)
 932 {
 933         NO_MAP_LOCK_REQUIRED;
 934         ObjectRef *ref = checkobject(L, 1);
 935         Player *player = getplayer(ref);
 936         if(player == NULL) return 0;
 937         // Do it
 938         lua_pushnumber(L, player->getRadYaw());
 939         return 1;
 940 }
 941
 942 // set_look_pitch(self, radians)
 943 int ObjectRef::l_set_look_pitch(lua_State *L)
 944 {
 945         NO_MAP_LOCK_REQUIRED;
 946         ObjectRef *ref = checkobject(L, 1);
 947         PlayerSAO* co = getplayersao(ref);
 948         if(co == NULL) return 0;
 949         float pitch = luaL_checknumber(L, 2) * core::RADTODEG;
 950         // Do it
 951         co->setPitch(pitch);
 952         return 1;
 953 }
 954
 955 // set_look_yaw(self, radians)
 956 int ObjectRef::l_set_look_yaw(lua_State *L)
 957 {
 958         NO_MAP_LOCK_REQUIRED;
 959         ObjectRef *ref = checkobject(L, 1);
 960         PlayerSAO* co = getplayersao(ref);
 961         if(co == NULL) return 0;
 962         float yaw = luaL_checknumber(L, 2) * core::RADTODEG;
 963         // Do it
 964         co->setYaw(yaw);
 965         return 1;
 966 }
 967
 968 // set_breath(self, breath)
 969 int ObjectRef::l_set_breath(lua_State *L)
 970 {
 971         NO_MAP_LOCK_REQUIRED;
 972         ObjectRef *ref = checkobject(L, 1);
 973         PlayerSAO* co = getplayersao(ref);
 974         if(co == NULL) return 0;
 975         u16 breath = luaL_checknumber(L, 2);
 976         // Do it
 977         co->setBreath(breath);
 978
 979         // If the object is a player sent the breath to client
 980         if (co->getType() == ACTIVEOBJECT_TYPE_PLAYER)
 981                         getServer(L)->SendPlayerBreath(((PlayerSAO*)co)->getPeerID());
 982
 983         return 0;
 984 }
 985
 986 // get_breath(self)
 987 int ObjectRef::l_get_breath(lua_State *L)
 988 {
 989         NO_MAP_LOCK_REQUIRED;
 990         ObjectRef *ref = checkobject(L, 1);
 991         PlayerSAO* co = getplayersao(ref);
 992         if(co == NULL) return 0;
 993         // Do it
 994         u16 breath = co->getBreath();
 995         lua_pushinteger (L, breath);
 996         return 1;
 997 }
 998
 999 // set_inventory_formspec(self, formspec)
1000 int ObjectRef::l_set_inventory_formspec(lua_State *L)
1001 {
1002         NO_MAP_LOCK_REQUIRED;
1003         ObjectRef *ref = checkobject(L, 1);
1004         Player *player = getplayer(ref);
1005         if(player == NULL) return 0;
1006         std::string formspec = luaL_checkstring(L, 2);
1007
1008         player->inventory_formspec = formspec;
1009         getServer(L)->reportInventoryFormspecModified(player->getName());
1010         lua_pushboolean(L, true);
1011         return 1;
1012 }
1013
1014 // get_inventory_formspec(self) -> formspec
1015 int ObjectRef::l_get_inventory_formspec(lua_State *L)
1016 {
1017         NO_MAP_LOCK_REQUIRED;
1018         ObjectRef *ref = checkobject(L, 1);
1019         Player *player = getplayer(ref);
1020         if(player == NULL) return 0;
1021
1022         std::string formspec = player->inventory_formspec;
1023         lua_pushlstring(L, formspec.c_str(), formspec.size());
1024         return 1;
1025 }
1026
1027 // get_player_control(self)
1028 int ObjectRef::l_get_player_control(lua_State *L)
1029 {
1030         NO_MAP_LOCK_REQUIRED;
1031         ObjectRef *ref = checkobject(L, 1);
1032         Player *player = getplayer(ref);
1033         if(player == NULL){
1034                 lua_pushlstring(L, "", 0);
1035                 return 1;
1036         }
1037         // Do it
1038         PlayerControl control = player->getPlayerControl();
1039         lua_newtable(L);
1040         lua_pushboolean(L, control.up);
1041         lua_setfield(L, -2, "up");
1042         lua_pushboolean(L, control.down);
1043         lua_setfield(L, -2, "down");
1044         lua_pushboolean(L, control.left);
1045         lua_setfield(L, -2, "left");
1046         lua_pushboolean(L, control.right);
1047         lua_setfield(L, -2, "right");
1048         lua_pushboolean(L, control.jump);
1049         lua_setfield(L, -2, "jump");
1050         lua_pushboolean(L, control.aux1);
1051         lua_setfield(L, -2, "aux1");
1052         lua_pushboolean(L, control.sneak);
1053         lua_setfield(L, -2, "sneak");
1054         lua_pushboolean(L, control.LMB);
1055         lua_setfield(L, -2, "LMB");
1056         lua_pushboolean(L, control.RMB);
1057         lua_setfield(L, -2, "RMB");
1058         return 1;
1059 }
1060
1061 // get_player_control_bits(self)
1062 int ObjectRef::l_get_player_control_bits(lua_State *L)
1063 {
1064         NO_MAP_LOCK_REQUIRED;
1065         ObjectRef *ref = checkobject(L, 1);
1066         Player *player = getplayer(ref);
1067         if(player == NULL){
1068                 lua_pushlstring(L, "", 0);
1069                 return 1;
1070         }
1071         // Do it
1072         lua_pushnumber(L, player->keyPressed);
1073         return 1;
1074 }
1075
1076 // hud_add(self, form)
1077 int ObjectRef::l_hud_add(lua_State *L)
1078 {
1079         ObjectRef *ref = checkobject(L, 1);
1080         Player *player = getplayer(ref);
1081         if (player == NULL)
1082                 return 0;
1083
1084         HudElement *elem = new HudElement;
1085
1086         elem->type = (HudElementType)getenumfield(L, 2, "hud_elem_type",
1087                                                                 es_HudElementType, HUD_ELEM_TEXT);
1088
1089         lua_getfield(L, 2, "position");
1090         elem->pos = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
1091         lua_pop(L, 1);
1092
1093         lua_getfield(L, 2, "scale");
1094         elem->scale = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
1095         lua_pop(L, 1);
1096
1097         lua_getfield(L, 2, "size");
1098         elem->size = lua_istable(L, -1) ? read_v2s32(L, -1) : v2s32();
1099         lua_pop(L, 1);
1100
1101         elem->name   = getstringfield_default(L, 2, "name", "");
1102         elem->text   = getstringfield_default(L, 2, "text", "");
1103         elem->number = getintfield_default(L, 2, "number", 0);
1104         elem->item   = getintfield_default(L, 2, "item", 0);
1105         elem->dir    = getintfield_default(L, 2, "direction", 0);
1106
1107         // Deprecated, only for compatibility's sake
1108         if (elem->dir == 0)
1109                 elem->dir = getintfield_default(L, 2, "dir", 0);
1110
1111         lua_getfield(L, 2, "alignment");
1112         elem->align = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
1113         lua_pop(L, 1);
1114
1115         lua_getfield(L, 2, "offset");
1116         elem->offset = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
1117         lua_pop(L, 1);
1118
1119         lua_getfield(L, 2, "world_pos");
1120         elem->world_pos = lua_istable(L, -1) ? read_v3f(L, -1) : v3f();
1121         lua_pop(L, 1);
1122
1123         /* check for known deprecated element usage */
1124         if ((elem->type  == HUD_ELEM_STATBAR) && (elem->size == v2s32())) {
1125                 log_deprecated(L,"Deprecated usage of statbar without size!");
1126         }
1127
1128         u32 id = getServer(L)->hudAdd(player, elem);
1129         if (id == (u32)-1) {
1130                 delete elem;
1131                 return 0;
1132         }
1133
1134         lua_pushnumber(L, id);
1135         return 1;
1136 }
1137
1138 // hud_remove(self, id)
1139 int ObjectRef::l_hud_remove(lua_State *L)
1140 {
1141         ObjectRef *ref = checkobject(L, 1);
1142         Player *player = getplayer(ref);
1143         if (player == NULL)
1144                 return 0;
1145
1146         u32 id = -1;
1147         if (!lua_isnil(L, 2))
1148                 id = lua_tonumber(L, 2);
1149
1150         if (!getServer(L)->hudRemove(player, id))
1151                 return 0;
1152
1153         lua_pushboolean(L, true);
1154         return 1;
1155 }
1156
1157 // hud_change(self, id, stat, data)
1158 int ObjectRef::l_hud_change(lua_State *L)
1159 {
1160         ObjectRef *ref = checkobject(L, 1);
1161         Player *player = getplayer(ref);
1162         if (player == NULL)
1163                 return 0;
1164
1165         u32 id = lua_isnumber(L, 2) ? lua_tonumber(L, 2) : -1;
1166
1167         HudElement *e = player->getHud(id);
1168         if (!e)
1169                 return 0;
1170
1171         HudElementStat stat = HUD_STAT_NUMBER;
1172         if (lua_isstring(L, 3)) {
1173                 int statint;
1174                 std::string statstr = lua_tostring(L, 3);
1175                 stat = string_to_enum(es_HudElementStat, statint, statstr) ?
1176                                 (HudElementStat)statint : HUD_STAT_NUMBER;
1177         }
1178
1179         void *value = NULL;
1180         switch (stat) {
1181                 case HUD_STAT_POS:
1182                         e->pos = read_v2f(L, 4);
1183                         value = &e->pos;
1184                         break;
1185                 case HUD_STAT_NAME:
1186                         e->name = luaL_checkstring(L, 4);
1187                         value = &e->name;
1188                         break;
1189                 case HUD_STAT_SCALE:
1190                         e->scale = read_v2f(L, 4);
1191                         value = &e->scale;
1192                         break;
1193                 case HUD_STAT_TEXT:
1194                         e->text = luaL_checkstring(L, 4);
1195                         value = &e->text;
1196                         break;
1197                 case HUD_STAT_NUMBER:
1198                         e->number = luaL_checknumber(L, 4);
1199                         value = &e->number;
1200                         break;
1201                 case HUD_STAT_ITEM:
1202                         e->item = luaL_checknumber(L, 4);
1203                         value = &e->item;
1204                         break;
1205                 case HUD_STAT_DIR:
1206                         e->dir = luaL_checknumber(L, 4);
1207                         value = &e->dir;
1208                         break;
1209                 case HUD_STAT_ALIGN:
1210                         e->align = read_v2f(L, 4);
1211                         value = &e->align;
1212                         break;
1213                 case HUD_STAT_OFFSET:
1214                         e->offset = read_v2f(L, 4);
1215                         value = &e->offset;
1216                         break;
1217                 case HUD_STAT_WORLD_POS:
1218                         e->world_pos = read_v3f(L, 4);
1219                         value = &e->world_pos;
1220                         break;
1221                 case HUD_STAT_SIZE:
1222                         e->size = read_v2s32(L, 4);
1223                         value = &e->size;
1224                         break;
1225         }
1226
1227         getServer(L)->hudChange(player, id, stat, value);
1228
1229         lua_pushboolean(L, true);
1230         return 1;
1231 }
1232
1233 // hud_get(self, id)
1234 int ObjectRef::l_hud_get(lua_State *L)
1235 {
1236         ObjectRef *ref = checkobject(L, 1);
1237         Player *player = getplayer(ref);
1238         if (player == NULL)
1239                 return 0;
1240
1241         u32 id = lua_tonumber(L, -1);
1242
1243         HudElement *e = player->getHud(id);
1244         if (!e)
1245                 return 0;
1246
1247         lua_newtable(L);
1248
1249         lua_pushstring(L, es_HudElementType[(u8)e->type].str);
1250         lua_setfield(L, -2, "type");
1251
1252         push_v2f(L, e->pos);
1253         lua_setfield(L, -2, "position");
1254
1255         lua_pushstring(L, e->name.c_str());
1256         lua_setfield(L, -2, "name");
1257
1258         push_v2f(L, e->scale);
1259         lua_setfield(L, -2, "scale");
1260
1261         lua_pushstring(L, e->text.c_str());
1262         lua_setfield(L, -2, "text");
1263
1264         lua_pushnumber(L, e->number);
1265         lua_setfield(L, -2, "number");
1266
1267         lua_pushnumber(L, e->item);
1268         lua_setfield(L, -2, "item");
1269
1270         lua_pushnumber(L, e->dir);
1271         lua_setfield(L, -2, "direction");
1272
1273         // Deprecated, only for compatibility's sake
1274         lua_pushnumber(L, e->dir);
1275         lua_setfield(L, -2, "dir");
1276
1277         push_v3f(L, e->world_pos);
1278         lua_setfield(L, -2, "world_pos");
1279
1280         return 1;
1281 }
1282
1283 // hud_set_flags(self, flags)
1284 int ObjectRef::l_hud_set_flags(lua_State *L)
1285 {
1286         ObjectRef *ref = checkobject(L, 1);
1287         Player *player = getplayer(ref);
1288         if (player == NULL)
1289                 return 0;
1290
1291         u32 flags = 0;
1292         u32 mask  = 0;
1293         bool flag;
1294
1295         const EnumString *esp = es_HudBuiltinElement;
1296         for (int i = 0; esp[i].str; i++) {
1297                 if (getboolfield(L, 2, esp[i].str, flag)) {
1298                         flags |= esp[i].num * flag;
1299                         mask  |= esp[i].num;
1300                 }
1301         }
1302         if (!getServer(L)->hudSetFlags(player, flags, mask))
1303                 return 0;
1304
1305         lua_pushboolean(L, true);
1306         return 1;
1307 }
1308
1309 int ObjectRef::l_hud_get_flags(lua_State *L)
1310 {
1311         ObjectRef *ref = checkobject(L, 1);
1312         Player *player = getplayer(ref);
1313         if (player == NULL)
1314                 return 0;
1315
1316         lua_newtable(L);
1317         lua_pushboolean(L, player->hud_flags & HUD_FLAG_HOTBAR_VISIBLE);
1318         lua_setfield(L, -2, "hotbar");
1319         lua_pushboolean(L, player->hud_flags & HUD_FLAG_HEALTHBAR_VISIBLE);
1320         lua_setfield(L, -2, "healthbar");
1321         lua_pushboolean(L, player->hud_flags & HUD_FLAG_CROSSHAIR_VISIBLE);
1322         lua_setfield(L, -2, "crosshair");
1323         lua_pushboolean(L, player->hud_flags & HUD_FLAG_WIELDITEM_VISIBLE);
1324         lua_setfield(L, -2, "wielditem");
1325         lua_pushboolean(L, player->hud_flags & HUD_FLAG_BREATHBAR_VISIBLE);
1326         lua_setfield(L, -2, "breathbar");
1327
1328         return 1;
1329 }
1330
1331 // hud_set_hotbar_itemcount(self, hotbar_itemcount)
1332 int ObjectRef::l_hud_set_hotbar_itemcount(lua_State *L)
1333 {
1334         ObjectRef *ref = checkobject(L, 1);
1335         Player *player = getplayer(ref);
1336         if (player == NULL)
1337                 return 0;
1338
1339         s32 hotbar_itemcount = lua_tonumber(L, 2);
1340
1341         if (!getServer(L)->hudSetHotbarItemcount(player, hotbar_itemcount))
1342                 return 0;
1343
1344         lua_pushboolean(L, true);
1345         return 1;
1346 }
1347
1348 // hud_get_hotbar_itemcount(self)
1349 int ObjectRef::l_hud_get_hotbar_itemcount(lua_State *L)
1350 {
1351         ObjectRef *ref = checkobject(L, 1);
1352         Player *player = getplayer(ref);
1353         if (player == NULL)
1354                 return 0;
1355
1356         s32 hotbar_itemcount = getServer(L)->hudGetHotbarItemcount(player);
1357
1358         lua_pushnumber(L, hotbar_itemcount);
1359         return 1;
1360 }
1361
1362 // hud_set_hotbar_image(self, name)
1363 int ObjectRef::l_hud_set_hotbar_image(lua_State *L)
1364 {
1365         ObjectRef *ref = checkobject(L, 1);
1366         Player *player = getplayer(ref);
1367         if (player == NULL)
1368                 return 0;
1369
1370         std::string name = lua_tostring(L, 2);
1371
1372         getServer(L)->hudSetHotbarImage(player, name);
1373         return 1;
1374 }
1375
1376 // hud_get_hotbar_image(self)
1377 int ObjectRef::l_hud_get_hotbar_image(lua_State *L)
1378 {
1379         ObjectRef *ref = checkobject(L, 1);
1380         Player *player = getplayer(ref);
1381         if (player == NULL)
1382                 return 0;
1383
1384         std::string name = getServer(L)->hudGetHotbarImage(player);
1385         lua_pushlstring(L, name.c_str(), name.size());
1386         return 1;
1387 }
1388
1389 // hud_set_hotbar_selected_image(self, name)
1390 int ObjectRef::l_hud_set_hotbar_selected_image(lua_State *L)
1391 {
1392         ObjectRef *ref = checkobject(L, 1);
1393         Player *player = getplayer(ref);
1394         if (player == NULL)
1395                 return 0;
1396
1397         std::string name = lua_tostring(L, 2);
1398
1399         getServer(L)->hudSetHotbarSelectedImage(player, name);
1400         return 1;
1401 }
1402
1403 // hud_get_hotbar_selected_image(self)
1404 int ObjectRef::l_hud_get_hotbar_selected_image(lua_State *L)
1405 {
1406         ObjectRef *ref = checkobject(L, 1);
1407         Player *player = getplayer(ref);
1408         if (player == NULL)
1409                 return 0;
1410
1411         std::string name = getServer(L)->hudGetHotbarSelectedImage(player);
1412         lua_pushlstring(L, name.c_str(), name.size());
1413         return 1;
1414 }
1415
1416 // set_sky(self, bgcolor, type, list)
1417 int ObjectRef::l_set_sky(lua_State *L)
1418 {
1419         ObjectRef *ref = checkobject(L, 1);
1420         Player *player = getplayer(ref);
1421         if (player == NULL)
1422                 return 0;
1423
1424         video::SColor bgcolor(255,255,255,255);
1425         read_color(L, 2, &bgcolor);
1426
1427         std::string type = luaL_checkstring(L, 3);
1428
1429         std::vector<std::string> params;
1430         if (lua_istable(L, 4)) {
1431                 int table = lua_gettop(L);
1432                 lua_pushnil(L);
1433                 while (lua_next(L, table) != 0) {
1434                         // key at index -2 and value at index -1
1435                         if (lua_isstring(L, -1))
1436                                 params.push_back(lua_tostring(L, -1));
1437                         else
1438                                 params.push_back("");
1439                         // removes value, keeps key for next iteration
1440                         lua_pop(L, 1);
1441                 }
1442         }
1443
1444         if (type == "skybox" && params.size() != 6)
1445                 throw LuaError("skybox expects 6 textures");
1446
1447         if (!getServer(L)->setSky(player, bgcolor, type, params))
1448                 return 0;
1449
1450         lua_pushboolean(L, true);
1451         return 1;
1452 }
1453
1454 // get_sky(self)
1455 int ObjectRef::l_get_sky(lua_State *L)
1456 {
1457         ObjectRef *ref = checkobject(L, 1);
1458         Player *player = getplayer(ref);
1459         if (player == NULL)
1460                 return 0;
1461         video::SColor bgcolor(255, 255, 255, 255);
1462         std::string type;
1463         std::vector<std::string> params;
1464
1465         player->getSky(&bgcolor, &type, &params);
1466         type = type == "" ? "regular" : type;
1467
1468         push_ARGB8(L, bgcolor);
1469         lua_pushlstring(L, type.c_str(), type.size());
1470         lua_newtable(L);
1471         s16 i = 1;
1472         for (std::vector<std::string>::iterator it = params.begin();
1473                         it != params.end(); ++it) {
1474                 lua_pushlstring(L, it->c_str(), it->size());
1475                 lua_rawseti(L, -2, i);
1476                 i++;
1477         }
1478         return 3;
1479 }
1480
1481 // override_day_night_ratio(self, brightness=0...1)
1482 int ObjectRef::l_override_day_night_ratio(lua_State *L)
1483 {
1484         ObjectRef *ref = checkobject(L, 1);
1485         Player *player = getplayer(ref);
1486         if (player == NULL)
1487                 return 0;
1488
1489         bool do_override = false;
1490         float ratio = 0.0f;
1491         if (!lua_isnil(L, 2)){
1492                 do_override = true;
1493                 ratio = luaL_checknumber(L, 2);
1494         }
1495
1496         if (!getServer(L)->overrideDayNightRatio(player, do_override, ratio))
1497                 return 0;
1498
1499         lua_pushboolean(L, true);
1500         return 1;
1501 }
1502
1503 // get_day_night_ratio(self)
1504 int ObjectRef::l_get_day_night_ratio(lua_State *L)
1505 {
1506         ObjectRef *ref = checkobject(L, 1);
1507         Player *player = getplayer(ref);
1508         if (player == NULL)
1509                 return 0;
1510
1511         bool do_override;
1512         float ratio;
1513         player->getDayNightRatio(&do_override, &ratio);
1514
1515         if (do_override)
1516                 lua_pushnumber(L, ratio);
1517         else
1518                 lua_pushnil(L);
1519
1520         return 1;
1521 }
1522
1523 // set_nametag_attributes(self, attributes)
1524 int ObjectRef::l_set_nametag_attributes(lua_State *L)
1525 {
1526         NO_MAP_LOCK_REQUIRED;
1527         ObjectRef *ref = checkobject(L, 1);
1528         PlayerSAO *playersao = getplayersao(ref);
1529         if (playersao == NULL)
1530                 return 0;
1531
1532         lua_getfield(L, 2, "color");
1533         if (!lua_isnil(L, -1)) {
1534                 video::SColor color = playersao->getNametagColor();
1535                 if (!read_color(L, -1, &color))
1536                         return 0;
1537                 playersao->setNametagColor(color);
1538         }
1539
1540         lua_pushboolean(L, true);
1541         return 1;
1542 }
1543
1544 // get_nametag_attributes(self)
1545 int ObjectRef::l_get_nametag_attributes(lua_State *L)
1546 {
1547         NO_MAP_LOCK_REQUIRED;
1548         ObjectRef *ref = checkobject(L, 1);
1549         PlayerSAO *playersao = getplayersao(ref);
1550         if (playersao == NULL)
1551                 return 0;
1552
1553         video::SColor color = playersao->getNametagColor();
1554
1555         lua_newtable(L);
1556         push_ARGB8(L, color);
1557         lua_setfield(L, -2, "color");
1558
1559         return 1;
1560 }
1561
1562 ObjectRef::ObjectRef(ServerActiveObject *object):
1563         m_object(object)
1564 {
1565         //infostream<<"ObjectRef created for id="<<m_object->getId()<<std::endl;
1566 }
1567
1568 ObjectRef::~ObjectRef()
1569 {
1570         /*if(m_object)
1571                 infostream<<"ObjectRef destructing for id="
1572                                 <<m_object->getId()<<std::endl;
1573         else
1574                 infostream<<"ObjectRef destructing for id=unknown"<<std::endl;*/
1575 }
1576
1577 // Creates an ObjectRef and leaves it on top of stack
1578 // Not callable from Lua; all references are created on the C side.
1579 void ObjectRef::create(lua_State *L, ServerActiveObject *object)
1580 {
1581         ObjectRef *o = new ObjectRef(object);
1582         //infostream<<"ObjectRef::create: o="<<o<<std::endl;
1583         *(void **)(lua_newuserdata(L, sizeof(void *))) = o;
1584         luaL_getmetatable(L, className);
1585         lua_setmetatable(L, -2);
1586 }
1587
1588 void ObjectRef::set_null(lua_State *L)
1589 {
1590         ObjectRef *o = checkobject(L, -1);
1591         o->m_object = NULL;
1592 }
1593
1594 void ObjectRef::Register(lua_State *L)
1595 {
1596         lua_newtable(L);
1597         int methodtable = lua_gettop(L);
1598         luaL_newmetatable(L, className);
1599         int metatable = lua_gettop(L);
1600
1601         lua_pushliteral(L, "__metatable");
1602         lua_pushvalue(L, methodtable);
1603         lua_settable(L, metatable);  // hide metatable from Lua getmetatable()
1604
1605         lua_pushliteral(L, "__index");
1606         lua_pushvalue(L, methodtable);
1607         lua_settable(L, metatable);
1608
1609         lua_pushliteral(L, "__gc");
1610         lua_pushcfunction(L, gc_object);
1611         lua_settable(L, metatable);
1612
1613         lua_pop(L, 1);  // drop metatable
1614
1615         luaL_openlib(L, 0, methods, 0);  // fill methodtable
1616         lua_pop(L, 1);  // drop methodtable
1617
1618         // Cannot be created from Lua
1619         //lua_register(L, className, create_object);
1620 }
1621
1622 const char ObjectRef::className[] = "ObjectRef";
1623 const luaL_reg ObjectRef::methods[] = {
1624         // ServerActiveObject
1625         luamethod(ObjectRef, remove),
1626         luamethod(ObjectRef, getpos),
1627         luamethod(ObjectRef, setpos),
1628         luamethod(ObjectRef, moveto),
1629         luamethod(ObjectRef, punch),
1630         luamethod(ObjectRef, right_click),
1631         luamethod(ObjectRef, set_hp),
1632         luamethod(ObjectRef, get_hp),
1633         luamethod(ObjectRef, get_inventory),
1634         luamethod(ObjectRef, get_wield_list),
1635         luamethod(ObjectRef, get_wield_index),
1636         luamethod(ObjectRef, get_wielded_item),
1637         luamethod(ObjectRef, set_wielded_item),
1638         luamethod(ObjectRef, set_armor_groups),
1639         luamethod(ObjectRef, get_armor_groups),
1640         luamethod(ObjectRef, set_animation),
1641         luamethod(ObjectRef, get_animation),
1642         luamethod(ObjectRef, set_bone_position),
1643         luamethod(ObjectRef, get_bone_position),
1644         luamethod(ObjectRef, set_attach),
1645         luamethod(ObjectRef, get_attach),
1646         luamethod(ObjectRef, set_detach),
1647         luamethod(ObjectRef, set_properties),
1648         luamethod(ObjectRef, get_properties),
1649         // LuaEntitySAO-only
1650         luamethod(ObjectRef, setvelocity),
1651         luamethod(ObjectRef, getvelocity),
1652         luamethod(ObjectRef, setacceleration),
1653         luamethod(ObjectRef, getacceleration),
1654         luamethod(ObjectRef, setyaw),
1655         luamethod(ObjectRef, getyaw),
1656         luamethod(ObjectRef, settexturemod),
1657         luamethod(ObjectRef, setsprite),
1658         luamethod(ObjectRef, get_entity_name),
1659         luamethod(ObjectRef, get_luaentity),
1660         // Player-only
1661         luamethod(ObjectRef, is_player),
1662         luamethod(ObjectRef, is_player_connected),
1663         luamethod(ObjectRef, get_player_name),
1664         luamethod(ObjectRef, get_look_dir),
1665         luamethod(ObjectRef, get_look_pitch),
1666         luamethod(ObjectRef, get_look_yaw),
1667         luamethod(ObjectRef, set_look_yaw),
1668         luamethod(ObjectRef, set_look_pitch),
1669         luamethod(ObjectRef, get_breath),
1670         luamethod(ObjectRef, set_breath),
1671         luamethod(ObjectRef, set_inventory_formspec),
1672         luamethod(ObjectRef, get_inventory_formspec),
1673         luamethod(ObjectRef, get_player_control),
1674         luamethod(ObjectRef, get_player_control_bits),
1675         luamethod(ObjectRef, set_physics_override),
1676         luamethod(ObjectRef, get_physics_override),
1677         luamethod(ObjectRef, hud_add),
1678         luamethod(ObjectRef, hud_remove),
1679         luamethod(ObjectRef, hud_change),
1680         luamethod(ObjectRef, hud_get),
1681         luamethod(ObjectRef, hud_set_flags),
1682         luamethod(ObjectRef, hud_get_flags),
1683         luamethod(ObjectRef, hud_set_hotbar_itemcount),
1684         luamethod(ObjectRef, hud_get_hotbar_itemcount),
1685         luamethod(ObjectRef, hud_set_hotbar_image),
1686         luamethod(ObjectRef, hud_get_hotbar_image),
1687         luamethod(ObjectRef, hud_set_hotbar_selected_image),
1688         luamethod(ObjectRef, hud_get_hotbar_selected_image),
1689         luamethod(ObjectRef, set_sky),
1690         luamethod(ObjectRef, get_sky),
1691         luamethod(ObjectRef, override_day_night_ratio),
1692         luamethod(ObjectRef, get_day_night_ratio),
1693         luamethod(ObjectRef, set_local_animation),
1694         luamethod(ObjectRef, get_local_animation),
1695         luamethod(ObjectRef, set_eye_offset),
1696         luamethod(ObjectRef, get_eye_offset),
1697         luamethod(ObjectRef, set_nametag_attributes),
1698         luamethod(ObjectRef, get_nametag_attributes),
1699         {0,0}
1700 };