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 struct EnumString es_HudElementType[] =
  35 {
  36         {HUD_ELEM_IMAGE,     "image"},
  37         {HUD_ELEM_TEXT,      "text"},
  38         {HUD_ELEM_STATBAR,   "statbar"},
  39         {HUD_ELEM_INVENTORY, "inventory"},
  40         {HUD_ELEM_WAYPOINT,  "waypoint"},
  41 {0, NULL},
  42 };
  43
  44 struct EnumString es_HudElementStat[] =
  45 {
  46         {HUD_STAT_POS,    "position"},
  47         {HUD_STAT_POS,    "pos"}, /* Deprecated, only for compatibility's sake */
  48         {HUD_STAT_NAME,   "name"},
  49         {HUD_STAT_SCALE,  "scale"},
  50         {HUD_STAT_TEXT,   "text"},
  51         {HUD_STAT_NUMBER, "number"},
  52         {HUD_STAT_ITEM,   "item"},
  53         {HUD_STAT_DIR,    "direction"},
  54         {HUD_STAT_ALIGN,  "alignment"},
  55         {HUD_STAT_OFFSET, "offset"},
  56         {HUD_STAT_WORLD_POS, "world_pos"},
  57         {0, NULL},
  58 };
  59
  60 struct EnumString es_HudBuiltinElement[] =
  61 {
  62         {HUD_FLAG_HOTBAR_VISIBLE,    "hotbar"},
  63         {HUD_FLAG_HEALTHBAR_VISIBLE, "healthbar"},
  64         {HUD_FLAG_CROSSHAIR_VISIBLE, "crosshair"},
  65         {HUD_FLAG_WIELDITEM_VISIBLE, "wielditem"},
  66         {HUD_FLAG_BREATHBAR_VISIBLE, "breathbar"},
  67         {HUD_FLAG_MINIMAP_VISIBLE,   "minimap"},
  68         {0, NULL},
  69 };
  70
  71 /*
  72         ObjectRef
  73 */
  74
  75
  76 ObjectRef* ObjectRef::checkobject(lua_State *L, int narg)
  77 {
  78         luaL_checktype(L, narg, LUA_TUSERDATA);
  79         void *ud = luaL_checkudata(L, narg, className);
  80         if (!ud) luaL_typerror(L, narg, className);
  81         return *(ObjectRef**)ud;  // unbox pointer
  82 }
  83
  84 ServerActiveObject* ObjectRef::getobject(ObjectRef *ref)
  85 {
  86         ServerActiveObject *co = ref->m_object;
  87         return co;
  88 }
  89
  90 LuaEntitySAO* ObjectRef::getluaobject(ObjectRef *ref)
  91 {
  92         ServerActiveObject *obj = getobject(ref);
  93         if (obj == NULL)
  94                 return NULL;
  95         if (obj->getType() != ACTIVEOBJECT_TYPE_LUAENTITY)
  96                 return NULL;
  97         return (LuaEntitySAO*)obj;
  98 }
  99
 100 PlayerSAO* ObjectRef::getplayersao(ObjectRef *ref)
 101 {
 102         ServerActiveObject *obj = getobject(ref);
 103         if (obj == NULL)
 104                 return NULL;
 105         if (obj->getType() != ACTIVEOBJECT_TYPE_PLAYER)
 106                 return NULL;
 107         return (PlayerSAO*)obj;
 108 }
 109
 110 RemotePlayer *ObjectRef::getplayer(ObjectRef *ref)
 111 {
 112         PlayerSAO *playersao = getplayersao(ref);
 113         if (playersao == NULL)
 114                 return NULL;
 115         return playersao->getPlayer();
 116 }
 117
 118 // Exported functions
 119
 120 // garbage collector
 121 int ObjectRef::gc_object(lua_State *L) {
 122         ObjectRef *o = *(ObjectRef **)(lua_touserdata(L, 1));
 123         //infostream<<"ObjectRef::gc_object: o="<<o<<std::endl;
 124         delete o;
 125         return 0;
 126 }
 127
 128 // remove(self)
 129 int ObjectRef::l_remove(lua_State *L)
 130 {
 131         GET_ENV_PTR;
 132
 133         ObjectRef *ref = checkobject(L, 1);
 134         ServerActiveObject *co = getobject(ref);
 135         if (co == NULL)
 136                 return 0;
 137         if (co->getType() == ACTIVEOBJECT_TYPE_PLAYER)
 138                 return 0;
 139
 140         const UNORDERED_SET<int> &child_ids = co->getAttachmentChildIds();
 141         UNORDERED_SET<int>::const_iterator it;
 142         for (it = child_ids.begin(); it != child_ids.end(); ++it) {
 143                 // Child can be NULL if it was deleted earlier
 144                 if (ServerActiveObject *child = env->getActiveObject(*it))
 145                         child->setAttachment(0, "", v3f(0, 0, 0), v3f(0, 0, 0));
 146         }
 147
 148         verbosestream<<"ObjectRef::l_remove(): id="<<co->getId()<<std::endl;
 149         co->m_removed = true;
 150         return 0;
 151 }
 152
 153 // getpos(self)
 154 // returns: {x=num, y=num, z=num}
 155 int ObjectRef::l_getpos(lua_State *L)
 156 {
 157         NO_MAP_LOCK_REQUIRED;
 158         ObjectRef *ref = checkobject(L, 1);
 159         ServerActiveObject *co = getobject(ref);
 160         if (co == NULL) return 0;
 161         v3f pos = co->getBasePosition() / BS;
 162         lua_newtable(L);
 163         lua_pushnumber(L, pos.X);
 164         lua_setfield(L, -2, "x");
 165         lua_pushnumber(L, pos.Y);
 166         lua_setfield(L, -2, "y");
 167         lua_pushnumber(L, pos.Z);
 168         lua_setfield(L, -2, "z");
 169         return 1;
 170 }
 171
 172 // setpos(self, pos)
 173 int ObjectRef::l_setpos(lua_State *L)
 174 {
 175         NO_MAP_LOCK_REQUIRED;
 176         ObjectRef *ref = checkobject(L, 1);
 177         //LuaEntitySAO *co = getluaobject(ref);
 178         ServerActiveObject *co = getobject(ref);
 179         if (co == NULL) return 0;
 180         // pos
 181         v3f pos = checkFloatPos(L, 2);
 182         // Do it
 183         co->setPos(pos);
 184         return 0;
 185 }
 186
 187 // moveto(self, pos, continuous=false)
 188 int ObjectRef::l_moveto(lua_State *L)
 189 {
 190         NO_MAP_LOCK_REQUIRED;
 191         ObjectRef *ref = checkobject(L, 1);
 192         //LuaEntitySAO *co = getluaobject(ref);
 193         ServerActiveObject *co = getobject(ref);
 194         if (co == NULL) return 0;
 195         // pos
 196         v3f pos = checkFloatPos(L, 2);
 197         // continuous
 198         bool continuous = lua_toboolean(L, 3);
 199         // Do it
 200         co->moveTo(pos, continuous);
 201         return 0;
 202 }
 203
 204 // punch(self, puncher, time_from_last_punch, tool_capabilities, dir)
 205 int ObjectRef::l_punch(lua_State *L)
 206 {
 207         NO_MAP_LOCK_REQUIRED;
 208         ObjectRef *ref = checkobject(L, 1);
 209         ObjectRef *puncher_ref = checkobject(L, 2);
 210         ServerActiveObject *co = getobject(ref);
 211         ServerActiveObject *puncher = getobject(puncher_ref);
 212         if (co == NULL) return 0;
 213         if (puncher == NULL) return 0;
 214         v3f dir;
 215         if (lua_type(L, 5) != LUA_TTABLE)
 216                 dir = co->getBasePosition() - puncher->getBasePosition();
 217         else
 218                 dir = read_v3f(L, 5);
 219         float time_from_last_punch = 1000000;
 220         if (lua_isnumber(L, 3))
 221                 time_from_last_punch = lua_tonumber(L, 3);
 222         ToolCapabilities toolcap = read_tool_capabilities(L, 4);
 223         dir.normalize();
 224
 225         s16 src_original_hp = co->getHP();
 226         s16 dst_origin_hp = puncher->getHP();
 227
 228         // Do it
 229         co->punch(dir, &toolcap, puncher, time_from_last_punch);
 230
 231         // If the punched is a player, and its HP changed
 232         if (src_original_hp != co->getHP() &&
 233                         co->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
 234                 getServer(L)->SendPlayerHPOrDie((PlayerSAO *)co);
 235         }
 236
 237         // If the puncher is a player, and its HP changed
 238         if (dst_origin_hp != puncher->getHP() &&
 239                         puncher->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
 240                 getServer(L)->SendPlayerHPOrDie((PlayerSAO *)puncher);
 241         }
 242         return 0;
 243 }
 244
 245 // right_click(self, clicker); clicker = an another ObjectRef
 246 int ObjectRef::l_right_click(lua_State *L)
 247 {
 248         NO_MAP_LOCK_REQUIRED;
 249         ObjectRef *ref = checkobject(L, 1);
 250         ObjectRef *ref2 = checkobject(L, 2);
 251         ServerActiveObject *co = getobject(ref);
 252         ServerActiveObject *co2 = getobject(ref2);
 253         if (co == NULL) return 0;
 254         if (co2 == NULL) return 0;
 255         // Do it
 256         co->rightClick(co2);
 257         return 0;
 258 }
 259
 260 // set_hp(self, hp)
 261 // hp = number of hitpoints (2 * number of hearts)
 262 // returns: nil
 263 int ObjectRef::l_set_hp(lua_State *L)
 264 {
 265         NO_MAP_LOCK_REQUIRED;
 266         ObjectRef *ref = checkobject(L, 1);
 267         luaL_checknumber(L, 2);
 268         ServerActiveObject *co = getobject(ref);
 269         if (co == NULL) return 0;
 270         int hp = lua_tonumber(L, 2);
 271         /*infostream<<"ObjectRef::l_set_hp(): id="<<co->getId()
 272                         <<" hp="<<hp<<std::endl;*/
 273         // Do it
 274         co->setHP(hp);
 275         if (co->getType() == ACTIVEOBJECT_TYPE_PLAYER)
 276                 getServer(L)->SendPlayerHPOrDie((PlayerSAO *)co);
 277
 278         // Return
 279         return 0;
 280 }
 281
 282 // get_hp(self)
 283 // returns: number of hitpoints (2 * number of hearts)
 284 // 0 if not applicable to this type of object
 285 int ObjectRef::l_get_hp(lua_State *L)
 286 {
 287         NO_MAP_LOCK_REQUIRED;
 288         ObjectRef *ref = checkobject(L, 1);
 289         ServerActiveObject *co = getobject(ref);
 290         if (co == NULL) {
 291                 // Default hp is 1
 292                 lua_pushnumber(L, 1);
 293                 return 1;
 294         }
 295         int hp = co->getHP();
 296         /*infostream<<"ObjectRef::l_get_hp(): id="<<co->getId()
 297                         <<" hp="<<hp<<std::endl;*/
 298         // Return
 299         lua_pushnumber(L, hp);
 300         return 1;
 301 }
 302
 303 // get_inventory(self)
 304 int ObjectRef::l_get_inventory(lua_State *L)
 305 {
 306         NO_MAP_LOCK_REQUIRED;
 307         ObjectRef *ref = checkobject(L, 1);
 308         ServerActiveObject *co = getobject(ref);
 309         if (co == NULL) return 0;
 310         // Do it
 311         InventoryLocation loc = co->getInventoryLocation();
 312         if (getServer(L)->getInventory(loc) != NULL)
 313                 InvRef::create(L, loc);
 314         else
 315                 lua_pushnil(L); // An object may have no inventory (nil)
 316         return 1;
 317 }
 318
 319 // get_wield_list(self)
 320 int ObjectRef::l_get_wield_list(lua_State *L)
 321 {
 322         NO_MAP_LOCK_REQUIRED;
 323         ObjectRef *ref = checkobject(L, 1);
 324         ServerActiveObject *co = getobject(ref);
 325         if (co == NULL) return 0;
 326         // Do it
 327         lua_pushstring(L, co->getWieldList().c_str());
 328         return 1;
 329 }
 330
 331 // get_wield_index(self)
 332 int ObjectRef::l_get_wield_index(lua_State *L)
 333 {
 334         NO_MAP_LOCK_REQUIRED;
 335         ObjectRef *ref = checkobject(L, 1);
 336         ServerActiveObject *co = getobject(ref);
 337         if (co == NULL) return 0;
 338         // Do it
 339         lua_pushinteger(L, co->getWieldIndex() + 1);
 340         return 1;
 341 }
 342
 343 // get_wielded_item(self)
 344 int ObjectRef::l_get_wielded_item(lua_State *L)
 345 {
 346         NO_MAP_LOCK_REQUIRED;
 347         ObjectRef *ref = checkobject(L, 1);
 348         ServerActiveObject *co = getobject(ref);
 349         if (co == NULL) {
 350                 // Empty ItemStack
 351                 LuaItemStack::create(L, ItemStack());
 352                 return 1;
 353         }
 354         // Do it
 355         LuaItemStack::create(L, co->getWieldedItem());
 356         return 1;
 357 }
 358
 359 // set_wielded_item(self, itemstack or itemstring or table or nil)
 360 int ObjectRef::l_set_wielded_item(lua_State *L)
 361 {
 362         NO_MAP_LOCK_REQUIRED;
 363         ObjectRef *ref = checkobject(L, 1);
 364         ServerActiveObject *co = getobject(ref);
 365         if (co == NULL) return 0;
 366         // Do it
 367         ItemStack item = read_item(L, 2, getServer(L));
 368         bool success = co->setWieldedItem(item);
 369         if (success && co->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
 370                 getServer(L)->SendInventory(((PlayerSAO*)co));
 371         }
 372         lua_pushboolean(L, success);
 373         return 1;
 374 }
 375
 376 // set_armor_groups(self, groups)
 377 int ObjectRef::l_set_armor_groups(lua_State *L)
 378 {
 379         NO_MAP_LOCK_REQUIRED;
 380         ObjectRef *ref = checkobject(L, 1);
 381         ServerActiveObject *co = getobject(ref);
 382         if (co == NULL) return 0;
 383         // Do it
 384         ItemGroupList groups;
 385         read_groups(L, 2, groups);
 386         co->setArmorGroups(groups);
 387         return 0;
 388 }
 389
 390 // get_armor_groups(self)
 391 int ObjectRef::l_get_armor_groups(lua_State *L)
 392 {
 393         NO_MAP_LOCK_REQUIRED;
 394         ObjectRef *ref = checkobject(L, 1);
 395         ServerActiveObject *co = getobject(ref);
 396         if (co == NULL)
 397                 return 0;
 398         // Do it
 399         push_groups(L, co->getArmorGroups());
 400         return 1;
 401 }
 402
 403 // set_physics_override(self, physics_override_speed, physics_override_jump,
 404 //                      physics_override_gravity, sneak, sneak_glitch)
 405 int ObjectRef::l_set_physics_override(lua_State *L)
 406 {
 407         NO_MAP_LOCK_REQUIRED;
 408         ObjectRef *ref = checkobject(L, 1);
 409         PlayerSAO *co = (PlayerSAO *) getobject(ref);
 410         if (co == NULL) return 0;
 411         // Do it
 412         if (lua_istable(L, 2)) {
 413                 co->m_physics_override_speed = getfloatfield_default(L, 2, "speed", co->m_physics_override_speed);
 414                 co->m_physics_override_jump = getfloatfield_default(L, 2, "jump", co->m_physics_override_jump);
 415                 co->m_physics_override_gravity = getfloatfield_default(L, 2, "gravity", co->m_physics_override_gravity);
 416                 co->m_physics_override_sneak = getboolfield_default(L, 2, "sneak", co->m_physics_override_sneak);
 417                 co->m_physics_override_sneak_glitch = getboolfield_default(L, 2, "sneak_glitch", co->m_physics_override_sneak_glitch);
 418                 co->m_physics_override_sent = false;
 419         } else {
 420                 // old, non-table format
 421                 if (!lua_isnil(L, 2)) {
 422                         co->m_physics_override_speed = lua_tonumber(L, 2);
 423                         co->m_physics_override_sent = false;
 424                 }
 425                 if (!lua_isnil(L, 3)) {
 426                         co->m_physics_override_jump = lua_tonumber(L, 3);
 427                         co->m_physics_override_sent = false;
 428                 }
 429                 if (!lua_isnil(L, 4)) {
 430                         co->m_physics_override_gravity = lua_tonumber(L, 4);
 431                         co->m_physics_override_sent = false;
 432                 }
 433         }
 434         return 0;
 435 }
 436
 437 // get_physics_override(self)
 438 int ObjectRef::l_get_physics_override(lua_State *L)
 439 {
 440         NO_MAP_LOCK_REQUIRED;
 441         ObjectRef *ref = checkobject(L, 1);
 442         PlayerSAO *co = (PlayerSAO *)getobject(ref);
 443         if (co == NULL)
 444                 return 0;
 445         // Do it
 446         lua_newtable(L);
 447         lua_pushnumber(L, co->m_physics_override_speed);
 448         lua_setfield(L, -2, "speed");
 449         lua_pushnumber(L, co->m_physics_override_jump);
 450         lua_setfield(L, -2, "jump");
 451         lua_pushnumber(L, co->m_physics_override_gravity);
 452         lua_setfield(L, -2, "gravity");
 453         lua_pushboolean(L, co->m_physics_override_sneak);
 454         lua_setfield(L, -2, "sneak");
 455         lua_pushboolean(L, co->m_physics_override_sneak_glitch);
 456         lua_setfield(L, -2, "sneak_glitch");
 457         return 1;
 458 }
 459
 460 // set_animation(self, frame_range, frame_speed, frame_blend, frame_loop)
 461 int ObjectRef::l_set_animation(lua_State *L)
 462 {
 463         NO_MAP_LOCK_REQUIRED;
 464         ObjectRef *ref = checkobject(L, 1);
 465         ServerActiveObject *co = getobject(ref);
 466         if (co == NULL) return 0;
 467         // Do it
 468         v2f frames = v2f(1, 1);
 469         if (!lua_isnil(L, 2))
 470                 frames = read_v2f(L, 2);
 471         float frame_speed = 15;
 472         if (!lua_isnil(L, 3))
 473                 frame_speed = lua_tonumber(L, 3);
 474         float frame_blend = 0;
 475         if (!lua_isnil(L, 4))
 476                 frame_blend = lua_tonumber(L, 4);
 477         bool frame_loop = true;
 478         if (lua_isboolean(L, 5))
 479                 frame_loop = lua_toboolean(L, 5);
 480         co->setAnimation(frames, frame_speed, frame_blend, frame_loop);
 481         return 0;
 482 }
 483
 484 // get_animation(self)
 485 int ObjectRef::l_get_animation(lua_State *L)
 486 {
 487         NO_MAP_LOCK_REQUIRED;
 488         ObjectRef *ref = checkobject(L, 1);
 489         ServerActiveObject *co = getobject(ref);
 490         if (co == NULL)
 491                 return 0;
 492         // Do it
 493         v2f frames = v2f(1,1);
 494         float frame_speed = 15;
 495         float frame_blend = 0;
 496         bool frame_loop = true;
 497         co->getAnimation(&frames, &frame_speed, &frame_blend, &frame_loop);
 498
 499         push_v2f(L, frames);
 500         lua_pushnumber(L, frame_speed);
 501         lua_pushnumber(L, frame_blend);
 502         lua_pushboolean(L, frame_loop);
 503         return 4;
 504 }
 505
 506 // set_local_animation(self, {stand/idle}, {walk}, {dig}, {walk+dig}, frame_speed)
 507 int ObjectRef::l_set_local_animation(lua_State *L)
 508 {
 509         NO_MAP_LOCK_REQUIRED;
 510         ObjectRef *ref = checkobject(L, 1);
 511         RemotePlayer *player = getplayer(ref);
 512         if (player == NULL)
 513                 return 0;
 514         // Do it
 515         v2s32 frames[4];
 516         for (int i=0;i<4;i++) {
 517                 if (!lua_isnil(L, 2+1))
 518                         frames[i] = read_v2s32(L, 2+i);
 519         }
 520         float frame_speed = 30;
 521         if (!lua_isnil(L, 6))
 522                 frame_speed = lua_tonumber(L, 6);
 523
 524         if (!getServer(L)->setLocalPlayerAnimations(player, frames, frame_speed))
 525                 return 0;
 526
 527         lua_pushboolean(L, true);
 528         return 0;
 529 }
 530
 531 // get_local_animation(self)
 532 int ObjectRef::l_get_local_animation(lua_State *L)
 533 {
 534         NO_MAP_LOCK_REQUIRED
 535         ObjectRef *ref = checkobject(L, 1);
 536         RemotePlayer *player = getplayer(ref);
 537         if (player == NULL)
 538                 return 0;
 539
 540         v2s32 frames[4];
 541         float frame_speed;
 542         player->getLocalAnimations(frames, &frame_speed);
 543
 544         for (int i = 0; i < 4; i++) {
 545                 push_v2s32(L, frames[i]);
 546         }
 547
 548         lua_pushnumber(L, frame_speed);
 549         return 5;
 550 }
 551
 552 // set_eye_offset(self, v3f first pv, v3f third pv)
 553 int ObjectRef::l_set_eye_offset(lua_State *L)
 554 {
 555         NO_MAP_LOCK_REQUIRED;
 556         ObjectRef *ref = checkobject(L, 1);
 557         RemotePlayer *player = getplayer(ref);
 558         if (player == NULL)
 559                 return 0;
 560         // Do it
 561         v3f offset_first = v3f(0, 0, 0);
 562         v3f offset_third = v3f(0, 0, 0);
 563
 564         if (!lua_isnil(L, 2))
 565                 offset_first = read_v3f(L, 2);
 566         if (!lua_isnil(L, 3))
 567                 offset_third = read_v3f(L, 3);
 568
 569         // Prevent abuse of offset values (keep player always visible)
 570         offset_third.X = rangelim(offset_third.X,-10,10);
 571         offset_third.Z = rangelim(offset_third.Z,-5,5);
 572         /* TODO: if possible: improve the camera colision detetion to allow Y <= -1.5) */
 573         offset_third.Y = rangelim(offset_third.Y,-10,15); //1.5*BS
 574
 575         if (!getServer(L)->setPlayerEyeOffset(player, offset_first, offset_third))
 576                 return 0;
 577
 578         lua_pushboolean(L, true);
 579         return 0;
 580 }
 581
 582 // get_eye_offset(self)
 583 int ObjectRef::l_get_eye_offset(lua_State *L)
 584 {
 585         NO_MAP_LOCK_REQUIRED;
 586         ObjectRef *ref = checkobject(L, 1);
 587         RemotePlayer *player = getplayer(ref);
 588         if (player == NULL)
 589                 return 0;
 590         // Do it
 591         push_v3f(L, player->eye_offset_first);
 592         push_v3f(L, player->eye_offset_third);
 593         return 2;
 594 }
 595
 596 // set_bone_position(self, std::string bone, v3f position, v3f rotation)
 597 int ObjectRef::l_set_bone_position(lua_State *L)
 598 {
 599         NO_MAP_LOCK_REQUIRED;
 600         ObjectRef *ref = checkobject(L, 1);
 601         ServerActiveObject *co = getobject(ref);
 602         if (co == NULL) return 0;
 603         // Do it
 604         std::string bone = "";
 605         if (!lua_isnil(L, 2))
 606                 bone = lua_tostring(L, 2);
 607         v3f position = v3f(0, 0, 0);
 608         if (!lua_isnil(L, 3))
 609                 position = check_v3f(L, 3);
 610         v3f rotation = v3f(0, 0, 0);
 611         if (!lua_isnil(L, 4))
 612                 rotation = check_v3f(L, 4);
 613         co->setBonePosition(bone, position, rotation);
 614         return 0;
 615 }
 616
 617 // get_bone_position(self, bone)
 618 int ObjectRef::l_get_bone_position(lua_State *L)
 619 {
 620         NO_MAP_LOCK_REQUIRED;
 621         ObjectRef *ref = checkobject(L, 1);
 622         ServerActiveObject *co = getobject(ref);
 623         if (co == NULL)
 624                 return 0;
 625         // Do it
 626         std::string bone = "";
 627         if (!lua_isnil(L, 2))
 628                 bone = lua_tostring(L, 2);
 629
 630         v3f position = v3f(0, 0, 0);
 631         v3f rotation = v3f(0, 0, 0);
 632         co->getBonePosition(bone, &position, &rotation);
 633
 634         push_v3f(L, position);
 635         push_v3f(L, rotation);
 636         return 2;
 637 }
 638
 639 // set_attach(self, parent, bone, position, rotation)
 640 int ObjectRef::l_set_attach(lua_State *L)
 641 {
 642         GET_ENV_PTR;
 643
 644         ObjectRef *ref = checkobject(L, 1);
 645         ObjectRef *parent_ref = checkobject(L, 2);
 646         ServerActiveObject *co = getobject(ref);
 647         ServerActiveObject *parent = getobject(parent_ref);
 648         if (co == NULL)
 649                 return 0;
 650         if (parent == NULL)
 651                 return 0;
 652         // Do it
 653         int parent_id = 0;
 654         std::string bone = "";
 655         v3f position = v3f(0, 0, 0);
 656         v3f rotation = v3f(0, 0, 0);
 657         co->getAttachment(&parent_id, &bone, &position, &rotation);
 658         if (parent_id) {
 659                 ServerActiveObject *old_parent = env->getActiveObject(parent_id);
 660                 old_parent->removeAttachmentChild(co->getId());
 661         }
 662
 663         bone = "";
 664         if (!lua_isnil(L, 3))
 665                 bone = lua_tostring(L, 3);
 666         position = v3f(0, 0, 0);
 667         if (!lua_isnil(L, 4))
 668                 position = read_v3f(L, 4);
 669         rotation = v3f(0, 0, 0);
 670         if (!lua_isnil(L, 5))
 671                 rotation = read_v3f(L, 5);
 672         co->setAttachment(parent->getId(), bone, position, rotation);
 673         parent->addAttachmentChild(co->getId());
 674         return 0;
 675 }
 676
 677 // get_attach(self)
 678 int ObjectRef::l_get_attach(lua_State *L)
 679 {
 680         GET_ENV_PTR;
 681
 682         ObjectRef *ref = checkobject(L, 1);
 683         ServerActiveObject *co = getobject(ref);
 684         if (co == NULL)
 685                 return 0;
 686
 687         // Do it
 688         int parent_id = 0;
 689         std::string bone = "";
 690         v3f position = v3f(0, 0, 0);
 691         v3f rotation = v3f(0, 0, 0);
 692         co->getAttachment(&parent_id, &bone, &position, &rotation);
 693         if (!parent_id)
 694                 return 0;
 695         ServerActiveObject *parent = env->getActiveObject(parent_id);
 696
 697         getScriptApiBase(L)->objectrefGetOrCreate(L, parent);
 698         lua_pushlstring(L, bone.c_str(), bone.size());
 699         push_v3f(L, position);
 700         push_v3f(L, rotation);
 701         return 4;
 702 }
 703
 704 // set_detach(self)
 705 int ObjectRef::l_set_detach(lua_State *L)
 706 {
 707         GET_ENV_PTR;
 708
 709         ObjectRef *ref = checkobject(L, 1);
 710         ServerActiveObject *co = getobject(ref);
 711         if (co == NULL)
 712                 return 0;
 713
 714         int parent_id = 0;
 715         std::string bone = "";
 716         v3f position;
 717         v3f rotation;
 718         co->getAttachment(&parent_id, &bone, &position, &rotation);
 719         ServerActiveObject *parent = NULL;
 720         if (parent_id)
 721                 parent = env->getActiveObject(parent_id);
 722
 723         // Do it
 724         co->setAttachment(0, "", v3f(0,0,0), v3f(0,0,0));
 725         if (parent != NULL)
 726                 parent->removeAttachmentChild(co->getId());
 727         return 0;
 728 }
 729
 730 // set_properties(self, properties)
 731 int ObjectRef::l_set_properties(lua_State *L)
 732 {
 733         NO_MAP_LOCK_REQUIRED;
 734         ObjectRef *ref = checkobject(L, 1);
 735         ServerActiveObject *co = getobject(ref);
 736         if (co == NULL) return 0;
 737         ObjectProperties *prop = co->accessObjectProperties();
 738         if (!prop)
 739                 return 0;
 740         read_object_properties(L, 2, prop);
 741         co->notifyObjectPropertiesModified();
 742         return 0;
 743 }
 744
 745 // get_properties(self)
 746 int ObjectRef::l_get_properties(lua_State *L)
 747 {
 748         NO_MAP_LOCK_REQUIRED;
 749         ObjectRef *ref = checkobject(L, 1);
 750         ServerActiveObject *co = getobject(ref);
 751         if (co == NULL)
 752                 return 0;
 753         ObjectProperties *prop = co->accessObjectProperties();
 754         if (!prop)
 755                 return 0;
 756         push_object_properties(L, prop);
 757         return 1;
 758 }
 759
 760 // is_player(self)
 761 int ObjectRef::l_is_player(lua_State *L)
 762 {
 763         NO_MAP_LOCK_REQUIRED;
 764         ObjectRef *ref = checkobject(L, 1);
 765         RemotePlayer *player = getplayer(ref);
 766         lua_pushboolean(L, (player != NULL));
 767         return 1;
 768 }
 769
 770 // set_nametag_attributes(self, attributes)
 771 int ObjectRef::l_set_nametag_attributes(lua_State *L)
 772 {
 773         NO_MAP_LOCK_REQUIRED;
 774         ObjectRef *ref = checkobject(L, 1);
 775         ServerActiveObject *co = getobject(ref);
 776
 777         if (co == NULL)
 778                 return 0;
 779         ObjectProperties *prop = co->accessObjectProperties();
 780         if (!prop)
 781                 return 0;
 782
 783         lua_getfield(L, 2, "color");
 784         if (!lua_isnil(L, -1)) {
 785                 video::SColor color = prop->nametag_color;
 786                 read_color(L, -1, &color);
 787                 prop->nametag_color = color;
 788         }
 789         lua_pop(L, 1);
 790
 791         std::string nametag = getstringfield_default(L, 2, "text", "");
 792         if (nametag != "")
 793                 prop->nametag = nametag;
 794
 795         co->notifyObjectPropertiesModified();
 796         lua_pushboolean(L, true);
 797         return 1;
 798 }
 799
 800 // get_nametag_attributes(self)
 801 int ObjectRef::l_get_nametag_attributes(lua_State *L)
 802 {
 803         NO_MAP_LOCK_REQUIRED;
 804         ObjectRef *ref = checkobject(L, 1);
 805         ServerActiveObject *co = getobject(ref);
 806
 807         if (co == NULL)
 808                 return 0;
 809         ObjectProperties *prop = co->accessObjectProperties();
 810         if (!prop)
 811                 return 0;
 812
 813         video::SColor color = prop->nametag_color;
 814
 815         lua_newtable(L);
 816         push_ARGB8(L, color);
 817         lua_setfield(L, -2, "color");
 818         lua_pushstring(L, prop->nametag.c_str());
 819         lua_setfield(L, -2, "text");
 820         return 1;
 821 }
 822
 823 /* LuaEntitySAO-only */
 824
 825 // setvelocity(self, {x=num, y=num, z=num})
 826 int ObjectRef::l_setvelocity(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         v3f pos = checkFloatPos(L, 2);
 833         // Do it
 834         co->setVelocity(pos);
 835         return 0;
 836 }
 837
 838 // getvelocity(self)
 839 int ObjectRef::l_getvelocity(lua_State *L)
 840 {
 841         NO_MAP_LOCK_REQUIRED;
 842         ObjectRef *ref = checkobject(L, 1);
 843         LuaEntitySAO *co = getluaobject(ref);
 844         if (co == NULL) return 0;
 845         // Do it
 846         v3f v = co->getVelocity();
 847         pushFloatPos(L, v);
 848         return 1;
 849 }
 850
 851 // setacceleration(self, {x=num, y=num, z=num})
 852 int ObjectRef::l_setacceleration(lua_State *L)
 853 {
 854         NO_MAP_LOCK_REQUIRED;
 855         ObjectRef *ref = checkobject(L, 1);
 856         LuaEntitySAO *co = getluaobject(ref);
 857         if (co == NULL) return 0;
 858         // pos
 859         v3f pos = checkFloatPos(L, 2);
 860         // Do it
 861         co->setAcceleration(pos);
 862         return 0;
 863 }
 864
 865 // getacceleration(self)
 866 int ObjectRef::l_getacceleration(lua_State *L)
 867 {
 868         NO_MAP_LOCK_REQUIRED;
 869         ObjectRef *ref = checkobject(L, 1);
 870         LuaEntitySAO *co = getluaobject(ref);
 871         if (co == NULL) return 0;
 872         // Do it
 873         v3f v = co->getAcceleration();
 874         pushFloatPos(L, v);
 875         return 1;
 876 }
 877
 878 // setyaw(self, radians)
 879 int ObjectRef::l_setyaw(lua_State *L)
 880 {
 881         NO_MAP_LOCK_REQUIRED;
 882         ObjectRef *ref = checkobject(L, 1);
 883         LuaEntitySAO *co = getluaobject(ref);
 884         if (co == NULL) return 0;
 885         float yaw = luaL_checknumber(L, 2) * core::RADTODEG;
 886         // Do it
 887         co->setYaw(yaw);
 888         return 0;
 889 }
 890
 891 // getyaw(self)
 892 int ObjectRef::l_getyaw(lua_State *L)
 893 {
 894         NO_MAP_LOCK_REQUIRED;
 895         ObjectRef *ref = checkobject(L, 1);
 896         LuaEntitySAO *co = getluaobject(ref);
 897         if (co == NULL) return 0;
 898         // Do it
 899         float yaw = co->getYaw() * core::DEGTORAD;
 900         lua_pushnumber(L, yaw);
 901         return 1;
 902 }
 903
 904 // settexturemod(self, mod)
 905 int ObjectRef::l_settexturemod(lua_State *L)
 906 {
 907         NO_MAP_LOCK_REQUIRED;
 908         ObjectRef *ref = checkobject(L, 1);
 909         LuaEntitySAO *co = getluaobject(ref);
 910         if (co == NULL) return 0;
 911         // Do it
 912         std::string mod = luaL_checkstring(L, 2);
 913         co->setTextureMod(mod);
 914         return 0;
 915 }
 916
 917 // setsprite(self, p={x=0,y=0}, num_frames=1, framelength=0.2,
 918 //           select_horiz_by_yawpitch=false)
 919 int ObjectRef::l_setsprite(lua_State *L)
 920 {
 921         NO_MAP_LOCK_REQUIRED;
 922         ObjectRef *ref = checkobject(L, 1);
 923         LuaEntitySAO *co = getluaobject(ref);
 924         if (co == NULL) return 0;
 925         // Do it
 926         v2s16 p(0,0);
 927         if (!lua_isnil(L, 2))
 928                 p = read_v2s16(L, 2);
 929         int num_frames = 1;
 930         if (!lua_isnil(L, 3))
 931                 num_frames = lua_tonumber(L, 3);
 932         float framelength = 0.2;
 933         if (!lua_isnil(L, 4))
 934                 framelength = lua_tonumber(L, 4);
 935         bool select_horiz_by_yawpitch = false;
 936         if (!lua_isnil(L, 5))
 937                 select_horiz_by_yawpitch = lua_toboolean(L, 5);
 938         co->setSprite(p, num_frames, framelength, select_horiz_by_yawpitch);
 939         return 0;
 940 }
 941
 942 // DEPRECATED
 943 // get_entity_name(self)
 944 int ObjectRef::l_get_entity_name(lua_State *L)
 945 {
 946         NO_MAP_LOCK_REQUIRED;
 947         ObjectRef *ref = checkobject(L, 1);
 948         LuaEntitySAO *co = getluaobject(ref);
 949         log_deprecated(L,"Deprecated call to \"get_entity_name");
 950         if (co == NULL) return 0;
 951         // Do it
 952         std::string name = co->getName();
 953         lua_pushstring(L, name.c_str());
 954         return 1;
 955 }
 956
 957 // get_luaentity(self)
 958 int ObjectRef::l_get_luaentity(lua_State *L)
 959 {
 960         NO_MAP_LOCK_REQUIRED;
 961         ObjectRef *ref = checkobject(L, 1);
 962         LuaEntitySAO *co = getluaobject(ref);
 963         if (co == NULL) return 0;
 964         // Do it
 965         luaentity_get(L, co->getId());
 966         return 1;
 967 }
 968
 969 /* Player-only */
 970
 971 // is_player_connected(self)
 972 int ObjectRef::l_is_player_connected(lua_State *L)
 973 {
 974         NO_MAP_LOCK_REQUIRED;
 975         ObjectRef *ref = checkobject(L, 1);
 976         RemotePlayer *player = getplayer(ref);
 977         lua_pushboolean(L, (player != NULL && player->peer_id != 0));
 978         return 1;
 979 }
 980
 981 // get_player_name(self)
 982 int ObjectRef::l_get_player_name(lua_State *L)
 983 {
 984         NO_MAP_LOCK_REQUIRED;
 985         ObjectRef *ref = checkobject(L, 1);
 986         RemotePlayer *player = getplayer(ref);
 987         if (player == NULL) {
 988                 lua_pushlstring(L, "", 0);
 989                 return 1;
 990         }
 991         // Do it
 992         lua_pushstring(L, player->getName());
 993         return 1;
 994 }
 995
 996 // get_player_velocity(self)
 997 int ObjectRef::l_get_player_velocity(lua_State *L)
 998 {
 999         NO_MAP_LOCK_REQUIRED;
1000         ObjectRef *ref = checkobject(L, 1);
1001         RemotePlayer *player = getplayer(ref);
1002         if (player == NULL) {
1003                 lua_pushnil(L);
1004                 return 1;
1005         }
1006         // Do it
1007         push_v3f(L, player->getSpeed() / BS);
1008         return 1;
1009 }
1010
1011 // get_look_dir(self)
1012 int ObjectRef::l_get_look_dir(lua_State *L)
1013 {
1014         NO_MAP_LOCK_REQUIRED;
1015         ObjectRef *ref = checkobject(L, 1);
1016         PlayerSAO* co = getplayersao(ref);
1017         if (co == NULL) return 0;
1018         // Do it
1019         float pitch = co->getRadPitchDep();
1020         float yaw = co->getRadYawDep();
1021         v3f v(cos(pitch)*cos(yaw), sin(pitch), cos(pitch)*sin(yaw));
1022         push_v3f(L, v);
1023         return 1;
1024 }
1025
1026 // DEPRECATED
1027 // get_look_pitch(self)
1028 int ObjectRef::l_get_look_pitch(lua_State *L)
1029 {
1030         NO_MAP_LOCK_REQUIRED;
1031
1032         log_deprecated(L,
1033                 "Deprecated call to get_look_pitch, use get_look_vertical instead");
1034
1035         ObjectRef *ref = checkobject(L, 1);
1036         PlayerSAO* co = getplayersao(ref);
1037         if (co == NULL) return 0;
1038         // Do it
1039         lua_pushnumber(L, co->getRadPitchDep());
1040         return 1;
1041 }
1042
1043 // DEPRECATED
1044 // get_look_yaw(self)
1045 int ObjectRef::l_get_look_yaw(lua_State *L)
1046 {
1047         NO_MAP_LOCK_REQUIRED;
1048
1049         log_deprecated(L,
1050                 "Deprecated call to get_look_yaw, use get_look_horizontal instead");
1051
1052         ObjectRef *ref = checkobject(L, 1);
1053         PlayerSAO* co = getplayersao(ref);
1054         if (co == NULL) return 0;
1055         // Do it
1056         lua_pushnumber(L, co->getRadYawDep());
1057         return 1;
1058 }
1059
1060 // get_look_pitch2(self)
1061 int ObjectRef::l_get_look_vertical(lua_State *L)
1062 {
1063         NO_MAP_LOCK_REQUIRED;
1064         ObjectRef *ref = checkobject(L, 1);
1065         PlayerSAO* co = getplayersao(ref);
1066         if (co == NULL) return 0;
1067         // Do it
1068         lua_pushnumber(L, co->getRadPitch());
1069         return 1;
1070 }
1071
1072 // get_look_yaw2(self)
1073 int ObjectRef::l_get_look_horizontal(lua_State *L)
1074 {
1075         NO_MAP_LOCK_REQUIRED;
1076         ObjectRef *ref = checkobject(L, 1);
1077         PlayerSAO* co = getplayersao(ref);
1078         if (co == NULL) return 0;
1079         // Do it
1080         lua_pushnumber(L, co->getRadYaw());
1081         return 1;
1082 }
1083
1084 // set_look_vertical(self, radians)
1085 int ObjectRef::l_set_look_vertical(lua_State *L)
1086 {
1087         NO_MAP_LOCK_REQUIRED;
1088         ObjectRef *ref = checkobject(L, 1);
1089         PlayerSAO* co = getplayersao(ref);
1090         if (co == NULL) return 0;
1091         float pitch = luaL_checknumber(L, 2) * core::RADTODEG;
1092         // Do it
1093         co->setPitchAndSend(pitch);
1094         return 1;
1095 }
1096
1097 // set_look_horizontal(self, radians)
1098 int ObjectRef::l_set_look_horizontal(lua_State *L)
1099 {
1100         NO_MAP_LOCK_REQUIRED;
1101         ObjectRef *ref = checkobject(L, 1);
1102         PlayerSAO* co = getplayersao(ref);
1103         if (co == NULL) return 0;
1104         float yaw = luaL_checknumber(L, 2) * core::RADTODEG;
1105         // Do it
1106         co->setYawAndSend(yaw);
1107         return 1;
1108 }
1109
1110 // DEPRECATED
1111 // set_look_pitch(self, radians)
1112 int ObjectRef::l_set_look_pitch(lua_State *L)
1113 {
1114         NO_MAP_LOCK_REQUIRED;
1115
1116         log_deprecated(L,
1117                 "Deprecated call to set_look_pitch, use set_look_vertical instead.");
1118
1119         ObjectRef *ref = checkobject(L, 1);
1120         PlayerSAO* co = getplayersao(ref);
1121         if (co == NULL) return 0;
1122         float pitch = luaL_checknumber(L, 2) * core::RADTODEG;
1123         // Do it
1124         co->setPitchAndSend(pitch);
1125         return 1;
1126 }
1127
1128 // DEPRECATED
1129 // set_look_yaw(self, radians)
1130 int ObjectRef::l_set_look_yaw(lua_State *L)
1131 {
1132         NO_MAP_LOCK_REQUIRED;
1133
1134         log_deprecated(L,
1135                 "Deprecated call to set_look_yaw, use set_look_horizontal instead.");
1136
1137         ObjectRef *ref = checkobject(L, 1);
1138         PlayerSAO* co = getplayersao(ref);
1139         if (co == NULL) return 0;
1140         float yaw = luaL_checknumber(L, 2) * core::RADTODEG;
1141         // Do it
1142         co->setYawAndSend(yaw);
1143         return 1;
1144 }
1145
1146 // set_breath(self, breath)
1147 int ObjectRef::l_set_breath(lua_State *L)
1148 {
1149         NO_MAP_LOCK_REQUIRED;
1150         ObjectRef *ref = checkobject(L, 1);
1151         PlayerSAO* co = getplayersao(ref);
1152         if (co == NULL) return 0;
1153         u16 breath = luaL_checknumber(L, 2);
1154         co->setBreath(breath);
1155
1156         return 0;
1157 }
1158
1159 // get_breath(self)
1160 int ObjectRef::l_get_breath(lua_State *L)
1161 {
1162         NO_MAP_LOCK_REQUIRED;
1163         ObjectRef *ref = checkobject(L, 1);
1164         PlayerSAO* co = getplayersao(ref);
1165         if (co == NULL) return 0;
1166         // Do it
1167         u16 breath = co->getBreath();
1168         lua_pushinteger (L, breath);
1169         return 1;
1170 }
1171
1172 // set_inventory_formspec(self, formspec)
1173 int ObjectRef::l_set_inventory_formspec(lua_State *L)
1174 {
1175         NO_MAP_LOCK_REQUIRED;
1176         ObjectRef *ref = checkobject(L, 1);
1177         RemotePlayer *player = getplayer(ref);
1178         if (player == NULL) return 0;
1179         std::string formspec = luaL_checkstring(L, 2);
1180
1181         player->inventory_formspec = formspec;
1182         getServer(L)->reportInventoryFormspecModified(player->getName());
1183         lua_pushboolean(L, true);
1184         return 1;
1185 }
1186
1187 // get_inventory_formspec(self) -> formspec
1188 int ObjectRef::l_get_inventory_formspec(lua_State *L)
1189 {
1190         NO_MAP_LOCK_REQUIRED;
1191         ObjectRef *ref = checkobject(L, 1);
1192         RemotePlayer *player = getplayer(ref);
1193         if (player == NULL) return 0;
1194
1195         std::string formspec = player->inventory_formspec;
1196         lua_pushlstring(L, formspec.c_str(), formspec.size());
1197         return 1;
1198 }
1199
1200 // get_player_control(self)
1201 int ObjectRef::l_get_player_control(lua_State *L)
1202 {
1203         NO_MAP_LOCK_REQUIRED;
1204         ObjectRef *ref = checkobject(L, 1);
1205         RemotePlayer *player = getplayer(ref);
1206         if (player == NULL) {
1207                 lua_pushlstring(L, "", 0);
1208                 return 1;
1209         }
1210
1211         const PlayerControl &control = player->getPlayerControl();
1212         lua_newtable(L);
1213         lua_pushboolean(L, control.up);
1214         lua_setfield(L, -2, "up");
1215         lua_pushboolean(L, control.down);
1216         lua_setfield(L, -2, "down");
1217         lua_pushboolean(L, control.left);
1218         lua_setfield(L, -2, "left");
1219         lua_pushboolean(L, control.right);
1220         lua_setfield(L, -2, "right");
1221         lua_pushboolean(L, control.jump);
1222         lua_setfield(L, -2, "jump");
1223         lua_pushboolean(L, control.aux1);
1224         lua_setfield(L, -2, "aux1");
1225         lua_pushboolean(L, control.sneak);
1226         lua_setfield(L, -2, "sneak");
1227         lua_pushboolean(L, control.LMB);
1228         lua_setfield(L, -2, "LMB");
1229         lua_pushboolean(L, control.RMB);
1230         lua_setfield(L, -2, "RMB");
1231         return 1;
1232 }
1233
1234 // get_player_control_bits(self)
1235 int ObjectRef::l_get_player_control_bits(lua_State *L)
1236 {
1237         NO_MAP_LOCK_REQUIRED;
1238         ObjectRef *ref = checkobject(L, 1);
1239         RemotePlayer *player = getplayer(ref);
1240         if (player == NULL) {
1241                 lua_pushlstring(L, "", 0);
1242                 return 1;
1243         }
1244         // Do it
1245         lua_pushnumber(L, player->keyPressed);
1246         return 1;
1247 }
1248
1249 // hud_add(self, form)
1250 int ObjectRef::l_hud_add(lua_State *L)
1251 {
1252         NO_MAP_LOCK_REQUIRED;
1253         ObjectRef *ref = checkobject(L, 1);
1254         RemotePlayer *player = getplayer(ref);
1255         if (player == NULL)
1256                 return 0;
1257
1258         HudElement *elem = new HudElement;
1259
1260         elem->type = (HudElementType)getenumfield(L, 2, "hud_elem_type",
1261                                                                 es_HudElementType, HUD_ELEM_TEXT);
1262
1263         lua_getfield(L, 2, "position");
1264         elem->pos = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
1265         lua_pop(L, 1);
1266
1267         lua_getfield(L, 2, "scale");
1268         elem->scale = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
1269         lua_pop(L, 1);
1270
1271         lua_getfield(L, 2, "size");
1272         elem->size = lua_istable(L, -1) ? read_v2s32(L, -1) : v2s32();
1273         lua_pop(L, 1);
1274
1275         elem->name   = getstringfield_default(L, 2, "name", "");
1276         elem->text   = getstringfield_default(L, 2, "text", "");
1277         elem->number = getintfield_default(L, 2, "number", 0);
1278         elem->item   = getintfield_default(L, 2, "item", 0);
1279         elem->dir    = getintfield_default(L, 2, "direction", 0);
1280
1281         // Deprecated, only for compatibility's sake
1282         if (elem->dir == 0)
1283                 elem->dir = getintfield_default(L, 2, "dir", 0);
1284
1285         lua_getfield(L, 2, "alignment");
1286         elem->align = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
1287         lua_pop(L, 1);
1288
1289         lua_getfield(L, 2, "offset");
1290         elem->offset = lua_istable(L, -1) ? read_v2f(L, -1) : v2f();
1291         lua_pop(L, 1);
1292
1293         lua_getfield(L, 2, "world_pos");
1294         elem->world_pos = lua_istable(L, -1) ? read_v3f(L, -1) : v3f();
1295         lua_pop(L, 1);
1296
1297         /* check for known deprecated element usage */
1298         if ((elem->type  == HUD_ELEM_STATBAR) && (elem->size == v2s32())) {
1299                 log_deprecated(L,"Deprecated usage of statbar without size!");
1300         }
1301
1302         u32 id = getServer(L)->hudAdd(player, elem);
1303         if (id == U32_MAX) {
1304                 delete elem;
1305                 return 0;
1306         }
1307
1308         lua_pushnumber(L, id);
1309         return 1;
1310 }
1311
1312 // hud_remove(self, id)
1313 int ObjectRef::l_hud_remove(lua_State *L)
1314 {
1315         NO_MAP_LOCK_REQUIRED;
1316         ObjectRef *ref = checkobject(L, 1);
1317         RemotePlayer *player = getplayer(ref);
1318         if (player == NULL)
1319                 return 0;
1320
1321         u32 id = -1;
1322         if (!lua_isnil(L, 2))
1323                 id = lua_tonumber(L, 2);
1324
1325         if (!getServer(L)->hudRemove(player, id))
1326                 return 0;
1327
1328         lua_pushboolean(L, true);
1329         return 1;
1330 }
1331
1332 // hud_change(self, id, stat, data)
1333 int ObjectRef::l_hud_change(lua_State *L)
1334 {
1335         NO_MAP_LOCK_REQUIRED;
1336         ObjectRef *ref = checkobject(L, 1);
1337         RemotePlayer *player = getplayer(ref);
1338         if (player == NULL)
1339                 return 0;
1340
1341         u32 id = lua_isnumber(L, 2) ? lua_tonumber(L, 2) : -1;
1342
1343         HudElement *e = player->getHud(id);
1344         if (!e)
1345                 return 0;
1346
1347         HudElementStat stat = HUD_STAT_NUMBER;
1348         if (lua_isstring(L, 3)) {
1349                 int statint;
1350                 std::string statstr = lua_tostring(L, 3);
1351                 stat = string_to_enum(es_HudElementStat, statint, statstr) ?
1352                                 (HudElementStat)statint : HUD_STAT_NUMBER;
1353         }
1354
1355         void *value = NULL;
1356         switch (stat) {
1357                 case HUD_STAT_POS:
1358                         e->pos = read_v2f(L, 4);
1359                         value = &e->pos;
1360                         break;
1361                 case HUD_STAT_NAME:
1362                         e->name = luaL_checkstring(L, 4);
1363                         value = &e->name;
1364                         break;
1365                 case HUD_STAT_SCALE:
1366                         e->scale = read_v2f(L, 4);
1367                         value = &e->scale;
1368                         break;
1369                 case HUD_STAT_TEXT:
1370                         e->text = luaL_checkstring(L, 4);
1371                         value = &e->text;
1372                         break;
1373                 case HUD_STAT_NUMBER:
1374                         e->number = luaL_checknumber(L, 4);
1375                         value = &e->number;
1376                         break;
1377                 case HUD_STAT_ITEM:
1378                         e->item = luaL_checknumber(L, 4);
1379                         value = &e->item;
1380                         break;
1381                 case HUD_STAT_DIR:
1382                         e->dir = luaL_checknumber(L, 4);
1383                         value = &e->dir;
1384                         break;
1385                 case HUD_STAT_ALIGN:
1386                         e->align = read_v2f(L, 4);
1387                         value = &e->align;
1388                         break;
1389                 case HUD_STAT_OFFSET:
1390                         e->offset = read_v2f(L, 4);
1391                         value = &e->offset;
1392                         break;
1393                 case HUD_STAT_WORLD_POS:
1394                         e->world_pos = read_v3f(L, 4);
1395                         value = &e->world_pos;
1396                         break;
1397                 case HUD_STAT_SIZE:
1398                         e->size = read_v2s32(L, 4);
1399                         value = &e->size;
1400                         break;
1401         }
1402
1403         getServer(L)->hudChange(player, id, stat, value);
1404
1405         lua_pushboolean(L, true);
1406         return 1;
1407 }
1408
1409 // hud_get(self, id)
1410 int ObjectRef::l_hud_get(lua_State *L)
1411 {
1412         NO_MAP_LOCK_REQUIRED;
1413         ObjectRef *ref = checkobject(L, 1);
1414         RemotePlayer *player = getplayer(ref);
1415         if (player == NULL)
1416                 return 0;
1417
1418         u32 id = lua_tonumber(L, -1);
1419
1420         HudElement *e = player->getHud(id);
1421         if (!e)
1422                 return 0;
1423
1424         lua_newtable(L);
1425
1426         lua_pushstring(L, es_HudElementType[(u8)e->type].str);
1427         lua_setfield(L, -2, "type");
1428
1429         push_v2f(L, e->pos);
1430         lua_setfield(L, -2, "position");
1431
1432         lua_pushstring(L, e->name.c_str());
1433         lua_setfield(L, -2, "name");
1434
1435         push_v2f(L, e->scale);
1436         lua_setfield(L, -2, "scale");
1437
1438         lua_pushstring(L, e->text.c_str());
1439         lua_setfield(L, -2, "text");
1440
1441         lua_pushnumber(L, e->number);
1442         lua_setfield(L, -2, "number");
1443
1444         lua_pushnumber(L, e->item);
1445         lua_setfield(L, -2, "item");
1446
1447         lua_pushnumber(L, e->dir);
1448         lua_setfield(L, -2, "direction");
1449
1450         // Deprecated, only for compatibility's sake
1451         lua_pushnumber(L, e->dir);
1452         lua_setfield(L, -2, "dir");
1453
1454         push_v3f(L, e->world_pos);
1455         lua_setfield(L, -2, "world_pos");
1456
1457         return 1;
1458 }
1459
1460 // hud_set_flags(self, flags)
1461 int ObjectRef::l_hud_set_flags(lua_State *L)
1462 {
1463         NO_MAP_LOCK_REQUIRED;
1464         ObjectRef *ref = checkobject(L, 1);
1465         RemotePlayer *player = getplayer(ref);
1466         if (player == NULL)
1467                 return 0;
1468
1469         u32 flags = 0;
1470         u32 mask  = 0;
1471         bool flag;
1472
1473         const EnumString *esp = es_HudBuiltinElement;
1474         for (int i = 0; esp[i].str; i++) {
1475                 if (getboolfield(L, 2, esp[i].str, flag)) {
1476                         flags |= esp[i].num * flag;
1477                         mask  |= esp[i].num;
1478                 }
1479         }
1480         if (!getServer(L)->hudSetFlags(player, flags, mask))
1481                 return 0;
1482
1483         lua_pushboolean(L, true);
1484         return 1;
1485 }
1486
1487 int ObjectRef::l_hud_get_flags(lua_State *L)
1488 {
1489         NO_MAP_LOCK_REQUIRED;
1490         ObjectRef *ref = checkobject(L, 1);
1491         RemotePlayer *player = getplayer(ref);
1492         if (player == NULL)
1493                 return 0;
1494
1495         lua_newtable(L);
1496         lua_pushboolean(L, player->hud_flags & HUD_FLAG_HOTBAR_VISIBLE);
1497         lua_setfield(L, -2, "hotbar");
1498         lua_pushboolean(L, player->hud_flags & HUD_FLAG_HEALTHBAR_VISIBLE);
1499         lua_setfield(L, -2, "healthbar");
1500         lua_pushboolean(L, player->hud_flags & HUD_FLAG_CROSSHAIR_VISIBLE);
1501         lua_setfield(L, -2, "crosshair");
1502         lua_pushboolean(L, player->hud_flags & HUD_FLAG_WIELDITEM_VISIBLE);
1503         lua_setfield(L, -2, "wielditem");
1504         lua_pushboolean(L, player->hud_flags & HUD_FLAG_BREATHBAR_VISIBLE);
1505         lua_setfield(L, -2, "breathbar");
1506         lua_pushboolean(L, player->hud_flags & HUD_FLAG_MINIMAP_VISIBLE);
1507         lua_setfield(L, -2, "minimap");
1508
1509         return 1;
1510 }
1511
1512 // hud_set_hotbar_itemcount(self, hotbar_itemcount)
1513 int ObjectRef::l_hud_set_hotbar_itemcount(lua_State *L)
1514 {
1515         NO_MAP_LOCK_REQUIRED;
1516         ObjectRef *ref = checkobject(L, 1);
1517         RemotePlayer *player = getplayer(ref);
1518         if (player == NULL)
1519                 return 0;
1520
1521         s32 hotbar_itemcount = lua_tonumber(L, 2);
1522
1523         if (!getServer(L)->hudSetHotbarItemcount(player, hotbar_itemcount))
1524                 return 0;
1525
1526         lua_pushboolean(L, true);
1527         return 1;
1528 }
1529
1530 // hud_get_hotbar_itemcount(self)
1531 int ObjectRef::l_hud_get_hotbar_itemcount(lua_State *L)
1532 {
1533         NO_MAP_LOCK_REQUIRED;
1534         ObjectRef *ref = checkobject(L, 1);
1535         RemotePlayer *player = getplayer(ref);
1536         if (player == NULL)
1537                 return 0;
1538
1539         s32 hotbar_itemcount = getServer(L)->hudGetHotbarItemcount(player);
1540
1541         lua_pushnumber(L, hotbar_itemcount);
1542         return 1;
1543 }
1544
1545 // hud_set_hotbar_image(self, name)
1546 int ObjectRef::l_hud_set_hotbar_image(lua_State *L)
1547 {
1548         NO_MAP_LOCK_REQUIRED;
1549         ObjectRef *ref = checkobject(L, 1);
1550         RemotePlayer *player = getplayer(ref);
1551         if (player == NULL)
1552                 return 0;
1553
1554         std::string name = lua_tostring(L, 2);
1555
1556         getServer(L)->hudSetHotbarImage(player, name);
1557         return 1;
1558 }
1559
1560 // hud_get_hotbar_image(self)
1561 int ObjectRef::l_hud_get_hotbar_image(lua_State *L)
1562 {
1563         NO_MAP_LOCK_REQUIRED;
1564         ObjectRef *ref = checkobject(L, 1);
1565         RemotePlayer *player = getplayer(ref);
1566         if (player == NULL)
1567                 return 0;
1568
1569         std::string name = getServer(L)->hudGetHotbarImage(player);
1570         lua_pushlstring(L, name.c_str(), name.size());
1571         return 1;
1572 }
1573
1574 // hud_set_hotbar_selected_image(self, name)
1575 int ObjectRef::l_hud_set_hotbar_selected_image(lua_State *L)
1576 {
1577         NO_MAP_LOCK_REQUIRED;
1578         ObjectRef *ref = checkobject(L, 1);
1579         RemotePlayer *player = getplayer(ref);
1580         if (player == NULL)
1581                 return 0;
1582
1583         std::string name = lua_tostring(L, 2);
1584
1585         getServer(L)->hudSetHotbarSelectedImage(player, name);
1586         return 1;
1587 }
1588
1589 // hud_get_hotbar_selected_image(self)
1590 int ObjectRef::l_hud_get_hotbar_selected_image(lua_State *L)
1591 {
1592         NO_MAP_LOCK_REQUIRED;
1593         ObjectRef *ref = checkobject(L, 1);
1594         RemotePlayer *player = getplayer(ref);
1595         if (player == NULL)
1596                 return 0;
1597
1598         const std::string &name = getServer(L)->hudGetHotbarSelectedImage(player);
1599         lua_pushlstring(L, name.c_str(), name.size());
1600         return 1;
1601 }
1602
1603 // set_sky(self, bgcolor, type, list)
1604 int ObjectRef::l_set_sky(lua_State *L)
1605 {
1606         NO_MAP_LOCK_REQUIRED;
1607         ObjectRef *ref = checkobject(L, 1);
1608         RemotePlayer *player = getplayer(ref);
1609         if (player == NULL)
1610                 return 0;
1611
1612         video::SColor bgcolor(255,255,255,255);
1613         read_color(L, 2, &bgcolor);
1614
1615         std::string type = luaL_checkstring(L, 3);
1616
1617         std::vector<std::string> params;
1618         if (lua_istable(L, 4)) {
1619                 int table = lua_gettop(L);
1620                 lua_pushnil(L);
1621                 while (lua_next(L, table) != 0) {
1622                         // key at index -2 and value at index -1
1623                         if (lua_isstring(L, -1))
1624                                 params.push_back(lua_tostring(L, -1));
1625                         else
1626                                 params.push_back("");
1627                         // removes value, keeps key for next iteration
1628                         lua_pop(L, 1);
1629                 }
1630         }
1631
1632         if (type == "skybox" && params.size() != 6)
1633                 throw LuaError("skybox expects 6 textures");
1634
1635         if (!getServer(L)->setSky(player, bgcolor, type, params))
1636                 return 0;
1637
1638         lua_pushboolean(L, true);
1639         return 1;
1640 }
1641
1642 // get_sky(self)
1643 int ObjectRef::l_get_sky(lua_State *L)
1644 {
1645         NO_MAP_LOCK_REQUIRED;
1646         ObjectRef *ref = checkobject(L, 1);
1647         RemotePlayer *player = getplayer(ref);
1648         if (player == NULL)
1649                 return 0;
1650         video::SColor bgcolor(255, 255, 255, 255);
1651         std::string type;
1652         std::vector<std::string> params;
1653
1654         player->getSky(&bgcolor, &type, &params);
1655         type = type == "" ? "regular" : type;
1656
1657         push_ARGB8(L, bgcolor);
1658         lua_pushlstring(L, type.c_str(), type.size());
1659         lua_newtable(L);
1660         s16 i = 1;
1661         for (std::vector<std::string>::iterator it = params.begin();
1662                         it != params.end(); ++it) {
1663                 lua_pushlstring(L, it->c_str(), it->size());
1664                 lua_rawseti(L, -2, i);
1665                 i++;
1666         }
1667         return 3;
1668 }
1669
1670 // override_day_night_ratio(self, brightness=0...1)
1671 int ObjectRef::l_override_day_night_ratio(lua_State *L)
1672 {
1673         NO_MAP_LOCK_REQUIRED;
1674         ObjectRef *ref = checkobject(L, 1);
1675         RemotePlayer *player = getplayer(ref);
1676         if (player == NULL)
1677                 return 0;
1678
1679         bool do_override = false;
1680         float ratio = 0.0f;
1681         if (!lua_isnil(L, 2)) {
1682                 do_override = true;
1683                 ratio = luaL_checknumber(L, 2);
1684         }
1685
1686         if (!getServer(L)->overrideDayNightRatio(player, do_override, ratio))
1687                 return 0;
1688
1689         lua_pushboolean(L, true);
1690         return 1;
1691 }
1692
1693 // get_day_night_ratio(self)
1694 int ObjectRef::l_get_day_night_ratio(lua_State *L)
1695 {
1696         NO_MAP_LOCK_REQUIRED;
1697         ObjectRef *ref = checkobject(L, 1);
1698         RemotePlayer *player = getplayer(ref);
1699         if (player == NULL)
1700                 return 0;
1701
1702         bool do_override;
1703         float ratio;
1704         player->getDayNightRatio(&do_override, &ratio);
1705
1706         if (do_override)
1707                 lua_pushnumber(L, ratio);
1708         else
1709                 lua_pushnil(L);
1710
1711         return 1;
1712 }
1713
1714 ObjectRef::ObjectRef(ServerActiveObject *object):
1715         m_object(object)
1716 {
1717         //infostream<<"ObjectRef created for id="<<m_object->getId()<<std::endl;
1718 }
1719
1720 ObjectRef::~ObjectRef()
1721 {
1722         /*if (m_object)
1723                 infostream<<"ObjectRef destructing for id="
1724                                 <<m_object->getId()<<std::endl;
1725         else
1726                 infostream<<"ObjectRef destructing for id=unknown"<<std::endl;*/
1727 }
1728
1729 // Creates an ObjectRef and leaves it on top of stack
1730 // Not callable from Lua; all references are created on the C side.
1731 void ObjectRef::create(lua_State *L, ServerActiveObject *object)
1732 {
1733         ObjectRef *o = new ObjectRef(object);
1734         //infostream<<"ObjectRef::create: o="<<o<<std::endl;
1735         *(void **)(lua_newuserdata(L, sizeof(void *))) = o;
1736         luaL_getmetatable(L, className);
1737         lua_setmetatable(L, -2);
1738 }
1739
1740 void ObjectRef::set_null(lua_State *L)
1741 {
1742         ObjectRef *o = checkobject(L, -1);
1743         o->m_object = NULL;
1744 }
1745
1746 void ObjectRef::Register(lua_State *L)
1747 {
1748         lua_newtable(L);
1749         int methodtable = lua_gettop(L);
1750         luaL_newmetatable(L, className);
1751         int metatable = lua_gettop(L);
1752
1753         lua_pushliteral(L, "__metatable");
1754         lua_pushvalue(L, methodtable);
1755         lua_settable(L, metatable);  // hide metatable from Lua getmetatable()
1756
1757         lua_pushliteral(L, "__index");
1758         lua_pushvalue(L, methodtable);
1759         lua_settable(L, metatable);
1760
1761         lua_pushliteral(L, "__gc");
1762         lua_pushcfunction(L, gc_object);
1763         lua_settable(L, metatable);
1764
1765         lua_pop(L, 1);  // drop metatable
1766
1767         luaL_openlib(L, 0, methods, 0);  // fill methodtable
1768         lua_pop(L, 1);  // drop methodtable
1769
1770         // Cannot be created from Lua
1771         //lua_register(L, className, create_object);
1772 }
1773
1774 const char ObjectRef::className[] = "ObjectRef";
1775 const luaL_reg ObjectRef::methods[] = {
1776         // ServerActiveObject
1777         luamethod(ObjectRef, remove),
1778         luamethod(ObjectRef, getpos),
1779         luamethod(ObjectRef, setpos),
1780         luamethod(ObjectRef, moveto),
1781         luamethod(ObjectRef, punch),
1782         luamethod(ObjectRef, right_click),
1783         luamethod(ObjectRef, set_hp),
1784         luamethod(ObjectRef, get_hp),
1785         luamethod(ObjectRef, get_inventory),
1786         luamethod(ObjectRef, get_wield_list),
1787         luamethod(ObjectRef, get_wield_index),
1788         luamethod(ObjectRef, get_wielded_item),
1789         luamethod(ObjectRef, set_wielded_item),
1790         luamethod(ObjectRef, set_armor_groups),
1791         luamethod(ObjectRef, get_armor_groups),
1792         luamethod(ObjectRef, set_animation),
1793         luamethod(ObjectRef, get_animation),
1794         luamethod(ObjectRef, set_bone_position),
1795         luamethod(ObjectRef, get_bone_position),
1796         luamethod(ObjectRef, set_attach),
1797         luamethod(ObjectRef, get_attach),
1798         luamethod(ObjectRef, set_detach),
1799         luamethod(ObjectRef, set_properties),
1800         luamethod(ObjectRef, get_properties),
1801         luamethod(ObjectRef, set_nametag_attributes),
1802         luamethod(ObjectRef, get_nametag_attributes),
1803         // LuaEntitySAO-only
1804         luamethod(ObjectRef, setvelocity),
1805         luamethod(ObjectRef, getvelocity),
1806         luamethod(ObjectRef, setacceleration),
1807         luamethod(ObjectRef, getacceleration),
1808         luamethod(ObjectRef, setyaw),
1809         luamethod(ObjectRef, getyaw),
1810         luamethod(ObjectRef, settexturemod),
1811         luamethod(ObjectRef, setsprite),
1812         luamethod(ObjectRef, get_entity_name),
1813         luamethod(ObjectRef, get_luaentity),
1814         // Player-only
1815         luamethod(ObjectRef, is_player),
1816         luamethod(ObjectRef, is_player_connected),
1817         luamethod(ObjectRef, get_player_name),
1818         luamethod(ObjectRef, get_player_velocity),
1819         luamethod(ObjectRef, get_look_dir),
1820         luamethod(ObjectRef, get_look_pitch),
1821         luamethod(ObjectRef, get_look_yaw),
1822         luamethod(ObjectRef, get_look_vertical),
1823         luamethod(ObjectRef, get_look_horizontal),
1824         luamethod(ObjectRef, set_look_horizontal),
1825         luamethod(ObjectRef, set_look_vertical),
1826         luamethod(ObjectRef, set_look_yaw),
1827         luamethod(ObjectRef, set_look_pitch),
1828         luamethod(ObjectRef, get_breath),
1829         luamethod(ObjectRef, set_breath),
1830         luamethod(ObjectRef, set_inventory_formspec),
1831         luamethod(ObjectRef, get_inventory_formspec),
1832         luamethod(ObjectRef, get_player_control),
1833         luamethod(ObjectRef, get_player_control_bits),
1834         luamethod(ObjectRef, set_physics_override),
1835         luamethod(ObjectRef, get_physics_override),
1836         luamethod(ObjectRef, hud_add),
1837         luamethod(ObjectRef, hud_remove),
1838         luamethod(ObjectRef, hud_change),
1839         luamethod(ObjectRef, hud_get),
1840         luamethod(ObjectRef, hud_set_flags),
1841         luamethod(ObjectRef, hud_get_flags),
1842         luamethod(ObjectRef, hud_set_hotbar_itemcount),
1843         luamethod(ObjectRef, hud_get_hotbar_itemcount),
1844         luamethod(ObjectRef, hud_set_hotbar_image),
1845         luamethod(ObjectRef, hud_get_hotbar_image),
1846         luamethod(ObjectRef, hud_set_hotbar_selected_image),
1847         luamethod(ObjectRef, hud_get_hotbar_selected_image),
1848         luamethod(ObjectRef, set_sky),
1849         luamethod(ObjectRef, get_sky),
1850         luamethod(ObjectRef, override_day_night_ratio),
1851         luamethod(ObjectRef, get_day_night_ratio),
1852         luamethod(ObjectRef, set_local_animation),
1853         luamethod(ObjectRef, get_local_animation),
1854         luamethod(ObjectRef, set_eye_offset),
1855         luamethod(ObjectRef, get_eye_offset),
1856         {0,0}
1857 };