3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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.
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.
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.
20 #include "scriptapi.h"
21 #include "scriptapi_env.h"
25 #include "daynightratio.h"
26 #include "content_sao.h"
29 #include "pathfinder.h"
30 #include "util/pointedthing.h"
31 #include "scriptapi_types.h"
32 #include "scriptapi_noise.h"
33 #include "scriptapi_nodemeta.h"
34 #include "scriptapi_nodetimer.h"
35 #include "scriptapi_object.h"
36 #include "scriptapi_common.h"
37 #include "scriptapi_item.h"
38 #include "scriptapi_node.h"
42 extern void scriptapi_run_callbacks(lua_State *L, int nargs,
43 RunCallbacksMode mode);
46 class LuaABM : public ActiveBlockModifier
52 std::set<std::string> m_trigger_contents;
53 std::set<std::string> m_required_neighbors;
54 float m_trigger_interval;
57 LuaABM(lua_State *L, int id,
58 const std::set<std::string> &trigger_contents,
59 const std::set<std::string> &required_neighbors,
60 float trigger_interval, u32 trigger_chance):
63 m_trigger_contents(trigger_contents),
64 m_required_neighbors(required_neighbors),
65 m_trigger_interval(trigger_interval),
66 m_trigger_chance(trigger_chance)
69 virtual std::set<std::string> getTriggerContents()
71 return m_trigger_contents;
73 virtual std::set<std::string> getRequiredNeighbors()
75 return m_required_neighbors;
77 virtual float getTriggerInterval()
79 return m_trigger_interval;
81 virtual u32 getTriggerChance()
83 return m_trigger_chance;
85 virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n,
86 u32 active_object_count, u32 active_object_count_wider)
91 assert(lua_checkstack(L, 20));
92 StackUnroller stack_unroller(L);
94 // Get minetest.registered_abms
95 lua_getglobal(L, "minetest");
96 lua_getfield(L, -1, "registered_abms");
97 luaL_checktype(L, -1, LUA_TTABLE);
98 int registered_abms = lua_gettop(L);
100 // Get minetest.registered_abms[m_id]
101 lua_pushnumber(L, m_id);
102 lua_gettable(L, registered_abms);
107 luaL_checktype(L, -1, LUA_TTABLE);
108 lua_getfield(L, -1, "action");
109 luaL_checktype(L, -1, LUA_TFUNCTION);
111 pushnode(L, n, env->getGameDef()->ndef());
112 lua_pushnumber(L, active_object_count);
113 lua_pushnumber(L, active_object_count_wider);
114 if(lua_pcall(L, 4, 0, 0))
115 script_error(L, "error: %s", lua_tostring(L, -1));
123 int EnvRef::gc_object(lua_State *L) {
124 EnvRef *o = *(EnvRef **)(lua_touserdata(L, 1));
129 EnvRef* EnvRef::checkobject(lua_State *L, int narg)
131 luaL_checktype(L, narg, LUA_TUSERDATA);
132 void *ud = luaL_checkudata(L, narg, className);
133 if(!ud) luaL_typerror(L, narg, className);
134 return *(EnvRef**)ud; // unbox pointer
137 // Exported functions
139 // EnvRef:set_node(pos, node)
140 // pos = {x=num, y=num, z=num}
141 int EnvRef::l_set_node(lua_State *L)
143 EnvRef *o = checkobject(L, 1);
144 ServerEnvironment *env = o->m_env;
145 if(env == NULL) return 0;
146 INodeDefManager *ndef = env->getGameDef()->ndef();
148 v3s16 pos = read_v3s16(L, 2);
149 MapNode n = readnode(L, 3, ndef);
151 bool succeeded = env->setNode(pos, n);
152 lua_pushboolean(L, succeeded);
156 int EnvRef::l_add_node(lua_State *L)
158 return l_set_node(L);
161 // EnvRef:remove_node(pos)
162 // pos = {x=num, y=num, z=num}
163 int EnvRef::l_remove_node(lua_State *L)
165 EnvRef *o = checkobject(L, 1);
166 ServerEnvironment *env = o->m_env;
167 if(env == NULL) return 0;
170 v3s16 pos = read_v3s16(L, 2);
172 bool succeeded = env->removeNode(pos);
173 lua_pushboolean(L, succeeded);
177 // EnvRef:get_node(pos)
178 // pos = {x=num, y=num, z=num}
179 int EnvRef::l_get_node(lua_State *L)
181 EnvRef *o = checkobject(L, 1);
182 ServerEnvironment *env = o->m_env;
183 if(env == NULL) return 0;
185 v3s16 pos = read_v3s16(L, 2);
187 MapNode n = env->getMap().getNodeNoEx(pos);
189 pushnode(L, n, env->getGameDef()->ndef());
193 // EnvRef:get_node_or_nil(pos)
194 // pos = {x=num, y=num, z=num}
195 int EnvRef::l_get_node_or_nil(lua_State *L)
197 EnvRef *o = checkobject(L, 1);
198 ServerEnvironment *env = o->m_env;
199 if(env == NULL) return 0;
201 v3s16 pos = read_v3s16(L, 2);
204 MapNode n = env->getMap().getNode(pos);
206 pushnode(L, n, env->getGameDef()->ndef());
208 } catch(InvalidPositionException &e)
215 // EnvRef:get_node_light(pos, timeofday)
216 // pos = {x=num, y=num, z=num}
217 // timeofday: nil = current time, 0 = night, 0.5 = day
218 int EnvRef::l_get_node_light(lua_State *L)
220 EnvRef *o = checkobject(L, 1);
221 ServerEnvironment *env = o->m_env;
222 if(env == NULL) return 0;
224 v3s16 pos = read_v3s16(L, 2);
225 u32 time_of_day = env->getTimeOfDay();
226 if(lua_isnumber(L, 3))
227 time_of_day = 24000.0 * lua_tonumber(L, 3);
228 time_of_day %= 24000;
229 u32 dnr = time_to_daynight_ratio(time_of_day, true);
231 MapNode n = env->getMap().getNode(pos);
232 INodeDefManager *ndef = env->getGameDef()->ndef();
233 lua_pushinteger(L, n.getLightBlend(dnr, ndef));
235 } catch(InvalidPositionException &e)
242 // EnvRef:place_node(pos, node)
243 // pos = {x=num, y=num, z=num}
244 int EnvRef::l_place_node(lua_State *L)
246 EnvRef *o = checkobject(L, 1);
247 ServerEnvironment *env = o->m_env;
248 if(env == NULL) return 0;
249 v3s16 pos = read_v3s16(L, 2);
250 MapNode n = readnode(L, 3, env->getGameDef()->ndef());
252 // Don't attempt to load non-loaded area as of now
253 MapNode n_old = env->getMap().getNodeNoEx(pos);
254 if(n_old.getContent() == CONTENT_IGNORE){
255 lua_pushboolean(L, false);
258 // Create item to place
259 INodeDefManager *ndef = get_server(L)->ndef();
260 IItemDefManager *idef = get_server(L)->idef();
261 ItemStack item(ndef->get(n).name, 1, 0, "", idef);
262 // Make pointed position
263 PointedThing pointed;
264 pointed.type = POINTEDTHING_NODE;
265 pointed.node_abovesurface = pos;
266 pointed.node_undersurface = pos + v3s16(0,-1,0);
267 // Place it with a NULL placer (appears in Lua as a non-functional
269 bool success = scriptapi_item_on_place(L, item, NULL, pointed);
270 lua_pushboolean(L, success);
274 // EnvRef:dig_node(pos)
275 // pos = {x=num, y=num, z=num}
276 int EnvRef::l_dig_node(lua_State *L)
278 EnvRef *o = checkobject(L, 1);
279 ServerEnvironment *env = o->m_env;
280 if(env == NULL) return 0;
281 v3s16 pos = read_v3s16(L, 2);
283 // Don't attempt to load non-loaded area as of now
284 MapNode n = env->getMap().getNodeNoEx(pos);
285 if(n.getContent() == CONTENT_IGNORE){
286 lua_pushboolean(L, false);
289 // Dig it out with a NULL digger (appears in Lua as a
290 // non-functional ObjectRef)
291 bool success = scriptapi_node_on_dig(L, pos, n, NULL);
292 lua_pushboolean(L, success);
296 // EnvRef:punch_node(pos)
297 // pos = {x=num, y=num, z=num}
298 int EnvRef::l_punch_node(lua_State *L)
300 EnvRef *o = checkobject(L, 1);
301 ServerEnvironment *env = o->m_env;
302 if(env == NULL) return 0;
303 v3s16 pos = read_v3s16(L, 2);
305 // Don't attempt to load non-loaded area as of now
306 MapNode n = env->getMap().getNodeNoEx(pos);
307 if(n.getContent() == CONTENT_IGNORE){
308 lua_pushboolean(L, false);
311 // Punch it with a NULL puncher (appears in Lua as a non-functional
313 bool success = scriptapi_node_on_punch(L, pos, n, NULL);
314 lua_pushboolean(L, success);
318 // EnvRef:get_meta(pos)
319 int EnvRef::l_get_meta(lua_State *L)
321 //infostream<<"EnvRef::l_get_meta()"<<std::endl;
322 EnvRef *o = checkobject(L, 1);
323 ServerEnvironment *env = o->m_env;
324 if(env == NULL) return 0;
326 v3s16 p = read_v3s16(L, 2);
327 NodeMetaRef::create(L, p, env);
331 // EnvRef:get_node_timer(pos)
332 int EnvRef::l_get_node_timer(lua_State *L)
334 EnvRef *o = checkobject(L, 1);
335 ServerEnvironment *env = o->m_env;
336 if(env == NULL) return 0;
338 v3s16 p = read_v3s16(L, 2);
339 NodeTimerRef::create(L, p, env);
343 // EnvRef:add_entity(pos, entityname) -> ObjectRef or nil
344 // pos = {x=num, y=num, z=num}
345 int EnvRef::l_add_entity(lua_State *L)
347 //infostream<<"EnvRef::l_add_entity()"<<std::endl;
348 EnvRef *o = checkobject(L, 1);
349 ServerEnvironment *env = o->m_env;
350 if(env == NULL) return 0;
352 v3f pos = checkFloatPos(L, 2);
354 const char *name = luaL_checkstring(L, 3);
356 ServerActiveObject *obj = new LuaEntitySAO(env, pos, name, "");
357 int objectid = env->addActiveObject(obj);
358 // If failed to add, return nothing (reads as nil)
362 objectref_get_or_create(L, obj);
366 // EnvRef:add_item(pos, itemstack or itemstring or table) -> ObjectRef or nil
367 // pos = {x=num, y=num, z=num}
368 int EnvRef::l_add_item(lua_State *L)
370 //infostream<<"EnvRef::l_add_item()"<<std::endl;
371 EnvRef *o = checkobject(L, 1);
372 ServerEnvironment *env = o->m_env;
373 if(env == NULL) return 0;
375 //v3f pos = checkFloatPos(L, 2);
377 ItemStack item = read_item(L, 3);
378 if(item.empty() || !item.isKnown(get_server(L)->idef()))
380 // Use minetest.spawn_item to spawn a __builtin:item
381 lua_getglobal(L, "minetest");
382 lua_getfield(L, -1, "spawn_item");
386 lua_pushstring(L, item.getItemString().c_str());
387 if(lua_pcall(L, 2, 1, 0))
388 script_error(L, "error: %s", lua_tostring(L, -1));
390 /*lua_pushvalue(L, 1);
391 lua_pushstring(L, "__builtin:item");
392 lua_pushstring(L, item.getItemString().c_str());
393 return l_add_entity(L);*/
395 ServerActiveObject *obj = createItemSAO(env, pos, item.getItemString());
396 int objectid = env->addActiveObject(obj);
397 // If failed to add, return nothing (reads as nil)
401 objectref_get_or_create(L, obj);
405 // EnvRef:add_rat(pos)
406 // pos = {x=num, y=num, z=num}
407 int EnvRef::l_add_rat(lua_State *L)
409 infostream<<"EnvRef::l_add_rat(): C++ mobs have been removed."
410 <<" Doing nothing."<<std::endl;
414 // EnvRef:add_firefly(pos)
415 // pos = {x=num, y=num, z=num}
416 int EnvRef::l_add_firefly(lua_State *L)
418 infostream<<"EnvRef::l_add_firefly(): C++ mobs have been removed."
419 <<" Doing nothing."<<std::endl;
423 // EnvRef:get_player_by_name(name)
424 int EnvRef::l_get_player_by_name(lua_State *L)
426 EnvRef *o = checkobject(L, 1);
427 ServerEnvironment *env = o->m_env;
428 if(env == NULL) return 0;
430 const char *name = luaL_checkstring(L, 2);
431 Player *player = env->getPlayer(name);
436 PlayerSAO *sao = player->getPlayerSAO();
441 // Put player on stack
442 objectref_get_or_create(L, sao);
446 // EnvRef:get_objects_inside_radius(pos, radius)
447 int EnvRef::l_get_objects_inside_radius(lua_State *L)
449 // Get the table insert function
450 lua_getglobal(L, "table");
451 lua_getfield(L, -1, "insert");
452 int table_insert = lua_gettop(L);
454 EnvRef *o = checkobject(L, 1);
455 ServerEnvironment *env = o->m_env;
456 if(env == NULL) return 0;
458 v3f pos = checkFloatPos(L, 2);
459 float radius = luaL_checknumber(L, 3) * BS;
460 std::set<u16> ids = env->getObjectsInsideRadius(pos, radius);
462 int table = lua_gettop(L);
463 for(std::set<u16>::const_iterator
464 i = ids.begin(); i != ids.end(); i++){
465 ServerActiveObject *obj = env->getActiveObject(*i);
466 // Insert object reference into table
467 lua_pushvalue(L, table_insert);
468 lua_pushvalue(L, table);
469 objectref_get_or_create(L, obj);
470 if(lua_pcall(L, 2, 0, 0))
471 script_error(L, "error: %s", lua_tostring(L, -1));
476 // EnvRef:set_timeofday(val)
478 int EnvRef::l_set_timeofday(lua_State *L)
480 EnvRef *o = checkobject(L, 1);
481 ServerEnvironment *env = o->m_env;
482 if(env == NULL) return 0;
484 float timeofday_f = luaL_checknumber(L, 2);
485 assert(timeofday_f >= 0.0 && timeofday_f <= 1.0);
486 int timeofday_mh = (int)(timeofday_f * 24000.0);
487 // This should be set directly in the environment but currently
488 // such changes aren't immediately sent to the clients, so call
489 // the server instead.
490 //env->setTimeOfDay(timeofday_mh);
491 get_server(L)->setTimeOfDay(timeofday_mh);
495 // EnvRef:get_timeofday() -> 0...1
496 int EnvRef::l_get_timeofday(lua_State *L)
498 EnvRef *o = checkobject(L, 1);
499 ServerEnvironment *env = o->m_env;
500 if(env == NULL) return 0;
502 int timeofday_mh = env->getTimeOfDay();
503 float timeofday_f = (float)timeofday_mh / 24000.0;
504 lua_pushnumber(L, timeofday_f);
509 // EnvRef:find_node_near(pos, radius, nodenames) -> pos or nil
510 // nodenames: eg. {"ignore", "group:tree"} or "default:dirt"
511 int EnvRef::l_find_node_near(lua_State *L)
513 EnvRef *o = checkobject(L, 1);
514 ServerEnvironment *env = o->m_env;
515 if(env == NULL) return 0;
516 INodeDefManager *ndef = get_server(L)->ndef();
517 v3s16 pos = read_v3s16(L, 2);
518 int radius = luaL_checkinteger(L, 3);
519 std::set<content_t> filter;
520 if(lua_istable(L, 4)){
523 while(lua_next(L, table) != 0){
524 // key at index -2 and value at index -1
525 luaL_checktype(L, -1, LUA_TSTRING);
526 ndef->getIds(lua_tostring(L, -1), filter);
527 // removes value, keeps key for next iteration
530 } else if(lua_isstring(L, 4)){
531 ndef->getIds(lua_tostring(L, 4), filter);
534 for(int d=1; d<=radius; d++){
535 std::list<v3s16> list;
536 getFacePositions(list, d);
537 for(std::list<v3s16>::iterator i = list.begin();
538 i != list.end(); ++i){
539 v3s16 p = pos + (*i);
540 content_t c = env->getMap().getNodeNoEx(p).getContent();
541 if(filter.count(c) != 0){
550 // EnvRef:find_nodes_in_area(minp, maxp, nodenames) -> list of positions
551 // nodenames: eg. {"ignore", "group:tree"} or "default:dirt"
552 int EnvRef::l_find_nodes_in_area(lua_State *L)
554 EnvRef *o = checkobject(L, 1);
555 ServerEnvironment *env = o->m_env;
556 if(env == NULL) return 0;
557 INodeDefManager *ndef = get_server(L)->ndef();
558 v3s16 minp = read_v3s16(L, 2);
559 v3s16 maxp = read_v3s16(L, 3);
560 std::set<content_t> filter;
561 if(lua_istable(L, 4)){
564 while(lua_next(L, table) != 0){
565 // key at index -2 and value at index -1
566 luaL_checktype(L, -1, LUA_TSTRING);
567 ndef->getIds(lua_tostring(L, -1), filter);
568 // removes value, keeps key for next iteration
571 } else if(lua_isstring(L, 4)){
572 ndef->getIds(lua_tostring(L, 4), filter);
575 // Get the table insert function
576 lua_getglobal(L, "table");
577 lua_getfield(L, -1, "insert");
578 int table_insert = lua_gettop(L);
581 int table = lua_gettop(L);
582 for(s16 x=minp.X; x<=maxp.X; x++)
583 for(s16 y=minp.Y; y<=maxp.Y; y++)
584 for(s16 z=minp.Z; z<=maxp.Z; z++)
587 content_t c = env->getMap().getNodeNoEx(p).getContent();
588 if(filter.count(c) != 0){
589 lua_pushvalue(L, table_insert);
590 lua_pushvalue(L, table);
592 if(lua_pcall(L, 2, 0, 0))
593 script_error(L, "error: %s", lua_tostring(L, -1));
599 // EnvRef:get_perlin(seeddiff, octaves, persistence, scale)
600 // returns world-specific PerlinNoise
601 int EnvRef::l_get_perlin(lua_State *L)
603 EnvRef *o = checkobject(L, 1);
604 ServerEnvironment *env = o->m_env;
605 if(env == NULL) return 0;
607 int seeddiff = luaL_checkint(L, 2);
608 int octaves = luaL_checkint(L, 3);
609 float persistence = luaL_checknumber(L, 4);
610 float scale = luaL_checknumber(L, 5);
612 LuaPerlinNoise *n = new LuaPerlinNoise(seeddiff + int(env->getServerMap().getSeed()), octaves, persistence, scale);
613 *(void **)(lua_newuserdata(L, sizeof(void *))) = n;
614 luaL_getmetatable(L, "PerlinNoise");
615 lua_setmetatable(L, -2);
619 // EnvRef:get_perlin_map(noiseparams, size)
620 // returns world-specific PerlinNoiseMap
621 int EnvRef::l_get_perlin_map(lua_State *L)
623 EnvRef *o = checkobject(L, 1);
624 ServerEnvironment *env = o->m_env;
628 NoiseParams *np = read_noiseparams(L, 2);
631 v3s16 size = read_v3s16(L, 3);
633 int seed = (int)(env->getServerMap().getSeed());
634 LuaPerlinNoiseMap *n = new LuaPerlinNoiseMap(np, seed, size);
635 *(void **)(lua_newuserdata(L, sizeof(void *))) = n;
636 luaL_getmetatable(L, "PerlinNoiseMap");
637 lua_setmetatable(L, -2);
641 // EnvRef:clear_objects()
642 // clear all objects in the environment
643 int EnvRef::l_clear_objects(lua_State *L)
645 EnvRef *o = checkobject(L, 1);
646 o->m_env->clearAllObjects();
650 int EnvRef::l_line_of_sight(lua_State *L) {
651 float stepsize = 1.0;
653 //infostream<<"EnvRef::l_get_node()"<<std::endl;
654 EnvRef *o = checkobject(L, 1);
655 ServerEnvironment *env = o->m_env;
656 if(env == NULL) return 0;
658 // read position 1 from lua
659 v3f pos1 = checkFloatPos(L, 2);
660 // read position 2 from lua
661 v3f pos2 = checkFloatPos(L, 2);
662 //read step size from lua
663 if(lua_isnumber(L, 3))
664 stepsize = lua_tonumber(L, 3);
666 lua_pushboolean(L, env->line_of_sight(pos1,pos2,stepsize));
671 int EnvRef::l_find_path(lua_State *L)
673 EnvRef *o = checkobject(L, 1);
674 ServerEnvironment *env = o->m_env;
676 if(env == NULL) return 0;
678 v3s16 pos1 = read_v3s16(L, 2);
679 v3s16 pos2 = read_v3s16(L, 3);
680 unsigned int searchdistance = luaL_checkint(L, 4);
681 unsigned int max_jump = luaL_checkint(L, 5);
682 unsigned int max_drop = luaL_checkint(L, 6);
683 algorithm algo = A_PLAIN_NP;
684 if(! lua_isnil(L, 7)) {
685 std::string algorithm = luaL_checkstring(L,7);
687 if (algorithm == "A*")
690 if (algorithm == "Dijkstra")
694 std::vector<v3s16> path =
695 get_Path(env,pos1,pos2,searchdistance,max_jump,max_drop,algo);
700 int top = lua_gettop(L);
701 unsigned int index = 1;
702 for (std::vector<v3s16>::iterator i = path.begin(); i != path.end();i++)
704 lua_pushnumber(L,index);
706 lua_settable(L, top);
715 int EnvRef::l_spawn_tree(lua_State *L)
717 EnvRef *o = checkobject(L, 1);
718 ServerEnvironment *env = o->m_env;
719 if(env == NULL) return 0;
720 v3s16 p0 = read_v3s16(L, 2);
722 treegen::TreeDef tree_def;
723 std::string trunk,leaves,fruit;
724 INodeDefManager *ndef = env->getGameDef()->ndef();
726 if(lua_istable(L, 3))
728 getstringfield(L, 3, "axiom", tree_def.initial_axiom);
729 getstringfield(L, 3, "rules_a", tree_def.rules_a);
730 getstringfield(L, 3, "rules_b", tree_def.rules_b);
731 getstringfield(L, 3, "rules_c", tree_def.rules_c);
732 getstringfield(L, 3, "rules_d", tree_def.rules_d);
733 getstringfield(L, 3, "trunk", trunk);
734 tree_def.trunknode=ndef->getId(trunk);
735 getstringfield(L, 3, "leaves", leaves);
736 tree_def.leavesnode=ndef->getId(leaves);
737 tree_def.leaves2_chance=0;
738 getstringfield(L, 3, "leaves2", leaves);
741 tree_def.leaves2node=ndef->getId(leaves);
742 getintfield(L, 3, "leaves2_chance", tree_def.leaves2_chance);
744 getintfield(L, 3, "angle", tree_def.angle);
745 getintfield(L, 3, "iterations", tree_def.iterations);
746 getintfield(L, 3, "random_level", tree_def.iterations_random_level);
747 getstringfield(L, 3, "trunk_type", tree_def.trunk_type);
748 getboolfield(L, 3, "thin_branches", tree_def.thin_branches);
749 tree_def.fruit_chance=0;
750 getstringfield(L, 3, "fruit", fruit);
753 tree_def.fruitnode=ndef->getId(fruit);
754 getintfield(L, 3, "fruit_chance",tree_def.fruit_chance);
756 getintfield(L, 3, "seed", tree_def.seed);
760 treegen::spawn_ltree (env, p0, ndef, tree_def);
765 EnvRef::EnvRef(ServerEnvironment *env):
768 //infostream<<"EnvRef created"<<std::endl;
773 //infostream<<"EnvRef destructing"<<std::endl;
776 // Creates an EnvRef and leaves it on top of stack
777 // Not callable from Lua; all references are created on the C side.
778 void EnvRef::create(lua_State *L, ServerEnvironment *env)
780 EnvRef *o = new EnvRef(env);
781 //infostream<<"EnvRef::create: o="<<o<<std::endl;
782 *(void **)(lua_newuserdata(L, sizeof(void *))) = o;
783 luaL_getmetatable(L, className);
784 lua_setmetatable(L, -2);
787 void EnvRef::set_null(lua_State *L)
789 EnvRef *o = checkobject(L, -1);
793 void EnvRef::Register(lua_State *L)
796 int methodtable = lua_gettop(L);
797 luaL_newmetatable(L, className);
798 int metatable = lua_gettop(L);
800 lua_pushliteral(L, "__metatable");
801 lua_pushvalue(L, methodtable);
802 lua_settable(L, metatable); // hide metatable from Lua getmetatable()
804 lua_pushliteral(L, "__index");
805 lua_pushvalue(L, methodtable);
806 lua_settable(L, metatable);
808 lua_pushliteral(L, "__gc");
809 lua_pushcfunction(L, gc_object);
810 lua_settable(L, metatable);
812 lua_pop(L, 1); // drop metatable
814 luaL_openlib(L, 0, methods, 0); // fill methodtable
815 lua_pop(L, 1); // drop methodtable
817 // Cannot be created from Lua
818 //lua_register(L, className, create_object);
821 const char EnvRef::className[] = "EnvRef";
822 const luaL_reg EnvRef::methods[] = {
823 luamethod(EnvRef, set_node),
824 luamethod(EnvRef, add_node),
825 luamethod(EnvRef, remove_node),
826 luamethod(EnvRef, get_node),
827 luamethod(EnvRef, get_node_or_nil),
828 luamethod(EnvRef, get_node_light),
829 luamethod(EnvRef, place_node),
830 luamethod(EnvRef, dig_node),
831 luamethod(EnvRef, punch_node),
832 luamethod(EnvRef, add_entity),
833 luamethod(EnvRef, add_item),
834 luamethod(EnvRef, add_rat),
835 luamethod(EnvRef, add_firefly),
836 luamethod(EnvRef, get_meta),
837 luamethod(EnvRef, get_node_timer),
838 luamethod(EnvRef, get_player_by_name),
839 luamethod(EnvRef, get_objects_inside_radius),
840 luamethod(EnvRef, set_timeofday),
841 luamethod(EnvRef, get_timeofday),
842 luamethod(EnvRef, find_node_near),
843 luamethod(EnvRef, find_nodes_in_area),
844 luamethod(EnvRef, get_perlin),
845 luamethod(EnvRef, get_perlin_map),
846 luamethod(EnvRef, clear_objects),
847 luamethod(EnvRef, spawn_tree),
848 luamethod(EnvRef, line_of_sight),
849 luamethod(EnvRef, find_path),
853 void scriptapi_environment_on_generated(lua_State *L, v3s16 minp, v3s16 maxp,
857 assert(lua_checkstack(L, 20));
858 //infostream<<"scriptapi_environment_on_generated"<<std::endl;
859 StackUnroller stack_unroller(L);
861 // Get minetest.registered_on_generateds
862 lua_getglobal(L, "minetest");
863 lua_getfield(L, -1, "registered_on_generateds");
867 lua_pushnumber(L, blockseed);
868 scriptapi_run_callbacks(L, 3, RUN_CALLBACKS_MODE_FIRST);
871 void scriptapi_environment_step(lua_State *L, float dtime)
874 assert(lua_checkstack(L, 20));
875 //infostream<<"scriptapi_environment_step"<<std::endl;
876 StackUnroller stack_unroller(L);
878 // Get minetest.registered_globalsteps
879 lua_getglobal(L, "minetest");
880 lua_getfield(L, -1, "registered_globalsteps");
882 lua_pushnumber(L, dtime);
883 scriptapi_run_callbacks(L, 1, RUN_CALLBACKS_MODE_FIRST);
886 void scriptapi_add_environment(lua_State *L, ServerEnvironment *env)
889 assert(lua_checkstack(L, 20));
890 verbosestream<<"scriptapi_add_environment"<<std::endl;
891 StackUnroller stack_unroller(L);
893 // Create EnvRef on stack
894 EnvRef::create(L, env);
895 int envref = lua_gettop(L);
897 // minetest.env = envref
898 lua_getglobal(L, "minetest");
899 luaL_checktype(L, -1, LUA_TTABLE);
900 lua_pushvalue(L, envref);
901 lua_setfield(L, -2, "env");
903 // Store environment as light userdata in registry
904 lua_pushlightuserdata(L, env);
905 lua_setfield(L, LUA_REGISTRYINDEX, "minetest_env");
908 Add ActiveBlockModifiers to environment
911 // Get minetest.registered_abms
912 lua_getglobal(L, "minetest");
913 lua_getfield(L, -1, "registered_abms");
914 luaL_checktype(L, -1, LUA_TTABLE);
915 int registered_abms = lua_gettop(L);
917 if(lua_istable(L, registered_abms)){
918 int table = lua_gettop(L);
920 while(lua_next(L, table) != 0){
921 // key at index -2 and value at index -1
922 int id = lua_tonumber(L, -2);
923 int current_abm = lua_gettop(L);
925 std::set<std::string> trigger_contents;
926 lua_getfield(L, current_abm, "nodenames");
927 if(lua_istable(L, -1)){
928 int table = lua_gettop(L);
930 while(lua_next(L, table) != 0){
931 // key at index -2 and value at index -1
932 luaL_checktype(L, -1, LUA_TSTRING);
933 trigger_contents.insert(lua_tostring(L, -1));
934 // removes value, keeps key for next iteration
937 } else if(lua_isstring(L, -1)){
938 trigger_contents.insert(lua_tostring(L, -1));
942 std::set<std::string> required_neighbors;
943 lua_getfield(L, current_abm, "neighbors");
944 if(lua_istable(L, -1)){
945 int table = lua_gettop(L);
947 while(lua_next(L, table) != 0){
948 // key at index -2 and value at index -1
949 luaL_checktype(L, -1, LUA_TSTRING);
950 required_neighbors.insert(lua_tostring(L, -1));
951 // removes value, keeps key for next iteration
954 } else if(lua_isstring(L, -1)){
955 required_neighbors.insert(lua_tostring(L, -1));
959 float trigger_interval = 10.0;
960 getfloatfield(L, current_abm, "interval", trigger_interval);
962 int trigger_chance = 50;
963 getintfield(L, current_abm, "chance", trigger_chance);
965 LuaABM *abm = new LuaABM(L, id, trigger_contents,
966 required_neighbors, trigger_interval, trigger_chance);
968 env->addActiveBlockModifier(abm);
970 // removes value, keeps key for next iteration