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);
230 MapNode n = env->getMap().getNodeNoEx(pos);
232 MapNode n = env->getMap().getNode(pos);
233 INodeDefManager *ndef = env->getGameDef()->ndef();
234 lua_pushinteger(L, n.getLightBlend(dnr, ndef));
236 } catch(InvalidPositionException &e)
243 // EnvRef:place_node(pos, node)
244 // pos = {x=num, y=num, z=num}
245 int EnvRef::l_place_node(lua_State *L)
247 EnvRef *o = checkobject(L, 1);
248 ServerEnvironment *env = o->m_env;
249 if(env == NULL) return 0;
250 v3s16 pos = read_v3s16(L, 2);
251 MapNode n = readnode(L, 3, env->getGameDef()->ndef());
253 // Don't attempt to load non-loaded area as of now
254 MapNode n_old = env->getMap().getNodeNoEx(pos);
255 if(n_old.getContent() == CONTENT_IGNORE){
256 lua_pushboolean(L, false);
259 // Create item to place
260 INodeDefManager *ndef = get_server(L)->ndef();
261 IItemDefManager *idef = get_server(L)->idef();
262 ItemStack item(ndef->get(n).name, 1, 0, "", idef);
263 // Make pointed position
264 PointedThing pointed;
265 pointed.type = POINTEDTHING_NODE;
266 pointed.node_abovesurface = pos;
267 pointed.node_undersurface = pos + v3s16(0,-1,0);
268 // Place it with a NULL placer (appears in Lua as a non-functional
270 bool success = scriptapi_item_on_place(L, item, NULL, pointed);
271 lua_pushboolean(L, success);
275 // EnvRef:dig_node(pos)
276 // pos = {x=num, y=num, z=num}
277 int EnvRef::l_dig_node(lua_State *L)
279 EnvRef *o = checkobject(L, 1);
280 ServerEnvironment *env = o->m_env;
281 if(env == NULL) return 0;
282 v3s16 pos = read_v3s16(L, 2);
284 // Don't attempt to load non-loaded area as of now
285 MapNode n = env->getMap().getNodeNoEx(pos);
286 if(n.getContent() == CONTENT_IGNORE){
287 lua_pushboolean(L, false);
290 // Dig it out with a NULL digger (appears in Lua as a
291 // non-functional ObjectRef)
292 bool success = scriptapi_node_on_dig(L, pos, n, NULL);
293 lua_pushboolean(L, success);
297 // EnvRef:punch_node(pos)
298 // pos = {x=num, y=num, z=num}
299 int EnvRef::l_punch_node(lua_State *L)
301 EnvRef *o = checkobject(L, 1);
302 ServerEnvironment *env = o->m_env;
303 if(env == NULL) return 0;
304 v3s16 pos = read_v3s16(L, 2);
306 // Don't attempt to load non-loaded area as of now
307 MapNode n = env->getMap().getNodeNoEx(pos);
308 if(n.getContent() == CONTENT_IGNORE){
309 lua_pushboolean(L, false);
312 // Punch it with a NULL puncher (appears in Lua as a non-functional
314 bool success = scriptapi_node_on_punch(L, pos, n, NULL);
315 lua_pushboolean(L, success);
319 // EnvRef:get_meta(pos)
320 int EnvRef::l_get_meta(lua_State *L)
322 //infostream<<"EnvRef::l_get_meta()"<<std::endl;
323 EnvRef *o = checkobject(L, 1);
324 ServerEnvironment *env = o->m_env;
325 if(env == NULL) return 0;
327 v3s16 p = read_v3s16(L, 2);
328 NodeMetaRef::create(L, p, env);
332 // EnvRef:get_node_timer(pos)
333 int EnvRef::l_get_node_timer(lua_State *L)
335 EnvRef *o = checkobject(L, 1);
336 ServerEnvironment *env = o->m_env;
337 if(env == NULL) return 0;
339 v3s16 p = read_v3s16(L, 2);
340 NodeTimerRef::create(L, p, env);
344 // EnvRef:add_entity(pos, entityname) -> ObjectRef or nil
345 // pos = {x=num, y=num, z=num}
346 int EnvRef::l_add_entity(lua_State *L)
348 //infostream<<"EnvRef::l_add_entity()"<<std::endl;
349 EnvRef *o = checkobject(L, 1);
350 ServerEnvironment *env = o->m_env;
351 if(env == NULL) return 0;
353 v3f pos = checkFloatPos(L, 2);
355 const char *name = luaL_checkstring(L, 3);
357 ServerActiveObject *obj = new LuaEntitySAO(env, pos, name, "");
358 int objectid = env->addActiveObject(obj);
359 // If failed to add, return nothing (reads as nil)
363 objectref_get_or_create(L, obj);
367 // EnvRef:add_item(pos, itemstack or itemstring or table) -> ObjectRef or nil
368 // pos = {x=num, y=num, z=num}
369 int EnvRef::l_add_item(lua_State *L)
371 //infostream<<"EnvRef::l_add_item()"<<std::endl;
372 EnvRef *o = checkobject(L, 1);
373 ServerEnvironment *env = o->m_env;
374 if(env == NULL) return 0;
376 v3f pos = checkFloatPos(L, 2);
378 ItemStack item = read_item(L, 3);
379 if(item.empty() || !item.isKnown(get_server(L)->idef()))
381 // Use minetest.spawn_item to spawn a __builtin:item
382 lua_getglobal(L, "minetest");
383 lua_getfield(L, -1, "spawn_item");
387 lua_pushstring(L, item.getItemString().c_str());
388 if(lua_pcall(L, 2, 1, 0))
389 script_error(L, "error: %s", lua_tostring(L, -1));
391 /*lua_pushvalue(L, 1);
392 lua_pushstring(L, "__builtin:item");
393 lua_pushstring(L, item.getItemString().c_str());
394 return l_add_entity(L);*/
396 ServerActiveObject *obj = createItemSAO(env, pos, item.getItemString());
397 int objectid = env->addActiveObject(obj);
398 // If failed to add, return nothing (reads as nil)
402 objectref_get_or_create(L, obj);
406 // EnvRef:add_rat(pos)
407 // pos = {x=num, y=num, z=num}
408 int EnvRef::l_add_rat(lua_State *L)
410 infostream<<"EnvRef::l_add_rat(): C++ mobs have been removed."
411 <<" Doing nothing."<<std::endl;
415 // EnvRef:add_firefly(pos)
416 // pos = {x=num, y=num, z=num}
417 int EnvRef::l_add_firefly(lua_State *L)
419 infostream<<"EnvRef::l_add_firefly(): C++ mobs have been removed."
420 <<" Doing nothing."<<std::endl;
424 // EnvRef:get_player_by_name(name)
425 int EnvRef::l_get_player_by_name(lua_State *L)
427 EnvRef *o = checkobject(L, 1);
428 ServerEnvironment *env = o->m_env;
429 if(env == NULL) return 0;
431 const char *name = luaL_checkstring(L, 2);
432 Player *player = env->getPlayer(name);
437 PlayerSAO *sao = player->getPlayerSAO();
442 // Put player on stack
443 objectref_get_or_create(L, sao);
447 // EnvRef:get_objects_inside_radius(pos, radius)
448 int EnvRef::l_get_objects_inside_radius(lua_State *L)
450 // Get the table insert function
451 lua_getglobal(L, "table");
452 lua_getfield(L, -1, "insert");
453 int table_insert = lua_gettop(L);
455 EnvRef *o = checkobject(L, 1);
456 ServerEnvironment *env = o->m_env;
457 if(env == NULL) return 0;
459 v3f pos = checkFloatPos(L, 2);
460 float radius = luaL_checknumber(L, 3) * BS;
461 std::set<u16> ids = env->getObjectsInsideRadius(pos, radius);
463 int table = lua_gettop(L);
464 for(std::set<u16>::const_iterator
465 i = ids.begin(); i != ids.end(); i++){
466 ServerActiveObject *obj = env->getActiveObject(*i);
467 // Insert object reference into table
468 lua_pushvalue(L, table_insert);
469 lua_pushvalue(L, table);
470 objectref_get_or_create(L, obj);
471 if(lua_pcall(L, 2, 0, 0))
472 script_error(L, "error: %s", lua_tostring(L, -1));
477 // EnvRef:set_timeofday(val)
479 int EnvRef::l_set_timeofday(lua_State *L)
481 EnvRef *o = checkobject(L, 1);
482 ServerEnvironment *env = o->m_env;
483 if(env == NULL) return 0;
485 float timeofday_f = luaL_checknumber(L, 2);
486 assert(timeofday_f >= 0.0 && timeofday_f <= 1.0);
487 int timeofday_mh = (int)(timeofday_f * 24000.0);
488 // This should be set directly in the environment but currently
489 // such changes aren't immediately sent to the clients, so call
490 // the server instead.
491 //env->setTimeOfDay(timeofday_mh);
492 get_server(L)->setTimeOfDay(timeofday_mh);
496 // EnvRef:get_timeofday() -> 0...1
497 int EnvRef::l_get_timeofday(lua_State *L)
499 EnvRef *o = checkobject(L, 1);
500 ServerEnvironment *env = o->m_env;
501 if(env == NULL) return 0;
503 int timeofday_mh = env->getTimeOfDay();
504 float timeofday_f = (float)timeofday_mh / 24000.0;
505 lua_pushnumber(L, timeofday_f);
510 // EnvRef:find_node_near(pos, radius, nodenames) -> pos or nil
511 // nodenames: eg. {"ignore", "group:tree"} or "default:dirt"
512 int EnvRef::l_find_node_near(lua_State *L)
514 EnvRef *o = checkobject(L, 1);
515 ServerEnvironment *env = o->m_env;
516 if(env == NULL) return 0;
517 INodeDefManager *ndef = get_server(L)->ndef();
518 v3s16 pos = read_v3s16(L, 2);
519 int radius = luaL_checkinteger(L, 3);
520 std::set<content_t> filter;
521 if(lua_istable(L, 4)){
524 while(lua_next(L, table) != 0){
525 // key at index -2 and value at index -1
526 luaL_checktype(L, -1, LUA_TSTRING);
527 ndef->getIds(lua_tostring(L, -1), filter);
528 // removes value, keeps key for next iteration
531 } else if(lua_isstring(L, 4)){
532 ndef->getIds(lua_tostring(L, 4), filter);
535 for(int d=1; d<=radius; d++){
536 std::list<v3s16> list;
537 getFacePositions(list, d);
538 for(std::list<v3s16>::iterator i = list.begin();
539 i != list.end(); ++i){
540 v3s16 p = pos + (*i);
541 content_t c = env->getMap().getNodeNoEx(p).getContent();
542 if(filter.count(c) != 0){
551 // EnvRef:find_nodes_in_area(minp, maxp, nodenames) -> list of positions
552 // nodenames: eg. {"ignore", "group:tree"} or "default:dirt"
553 int EnvRef::l_find_nodes_in_area(lua_State *L)
555 EnvRef *o = checkobject(L, 1);
556 ServerEnvironment *env = o->m_env;
557 if(env == NULL) return 0;
558 INodeDefManager *ndef = get_server(L)->ndef();
559 v3s16 minp = read_v3s16(L, 2);
560 v3s16 maxp = read_v3s16(L, 3);
561 std::set<content_t> filter;
562 if(lua_istable(L, 4)){
565 while(lua_next(L, table) != 0){
566 // key at index -2 and value at index -1
567 luaL_checktype(L, -1, LUA_TSTRING);
568 ndef->getIds(lua_tostring(L, -1), filter);
569 // removes value, keeps key for next iteration
572 } else if(lua_isstring(L, 4)){
573 ndef->getIds(lua_tostring(L, 4), filter);
576 // Get the table insert function
577 lua_getglobal(L, "table");
578 lua_getfield(L, -1, "insert");
579 int table_insert = lua_gettop(L);
582 int table = lua_gettop(L);
583 for(s16 x=minp.X; x<=maxp.X; x++)
584 for(s16 y=minp.Y; y<=maxp.Y; y++)
585 for(s16 z=minp.Z; z<=maxp.Z; z++)
588 content_t c = env->getMap().getNodeNoEx(p).getContent();
589 if(filter.count(c) != 0){
590 lua_pushvalue(L, table_insert);
591 lua_pushvalue(L, table);
593 if(lua_pcall(L, 2, 0, 0))
594 script_error(L, "error: %s", lua_tostring(L, -1));
600 // EnvRef:get_perlin(seeddiff, octaves, persistence, scale)
601 // returns world-specific PerlinNoise
602 int EnvRef::l_get_perlin(lua_State *L)
604 EnvRef *o = checkobject(L, 1);
605 ServerEnvironment *env = o->m_env;
606 if(env == NULL) return 0;
608 int seeddiff = luaL_checkint(L, 2);
609 int octaves = luaL_checkint(L, 3);
610 float persistence = luaL_checknumber(L, 4);
611 float scale = luaL_checknumber(L, 5);
613 LuaPerlinNoise *n = new LuaPerlinNoise(seeddiff + int(env->getServerMap().getSeed()), octaves, persistence, scale);
614 *(void **)(lua_newuserdata(L, sizeof(void *))) = n;
615 luaL_getmetatable(L, "PerlinNoise");
616 lua_setmetatable(L, -2);
620 // EnvRef:get_perlin_map(noiseparams, size)
621 // returns world-specific PerlinNoiseMap
622 int EnvRef::l_get_perlin_map(lua_State *L)
624 EnvRef *o = checkobject(L, 1);
625 ServerEnvironment *env = o->m_env;
629 NoiseParams *np = read_noiseparams(L, 2);
632 v3s16 size = read_v3s16(L, 3);
634 int seed = (int)(env->getServerMap().getSeed());
635 LuaPerlinNoiseMap *n = new LuaPerlinNoiseMap(np, seed, size);
636 *(void **)(lua_newuserdata(L, sizeof(void *))) = n;
637 luaL_getmetatable(L, "PerlinNoiseMap");
638 lua_setmetatable(L, -2);
642 // EnvRef:clear_objects()
643 // clear all objects in the environment
644 int EnvRef::l_clear_objects(lua_State *L)
646 EnvRef *o = checkobject(L, 1);
647 o->m_env->clearAllObjects();
651 int EnvRef::l_line_of_sight(lua_State *L) {
652 float stepsize = 1.0;
654 //infostream<<"EnvRef::l_get_node()"<<std::endl;
655 EnvRef *o = checkobject(L, 1);
656 ServerEnvironment *env = o->m_env;
657 if(env == NULL) return 0;
659 // read position 1 from lua
660 v3f pos1 = checkFloatPos(L, 2);
661 // read position 2 from lua
662 v3f pos2 = checkFloatPos(L, 2);
663 //read step size from lua
664 if(lua_isnumber(L, 3))
665 stepsize = lua_tonumber(L, 3);
667 lua_pushboolean(L, env->line_of_sight(pos1,pos2,stepsize));
672 int EnvRef::l_find_path(lua_State *L)
674 EnvRef *o = checkobject(L, 1);
675 ServerEnvironment *env = o->m_env;
677 if(env == NULL) return 0;
679 v3s16 pos1 = read_v3s16(L, 2);
680 v3s16 pos2 = read_v3s16(L, 3);
681 unsigned int searchdistance = luaL_checkint(L, 4);
682 unsigned int max_jump = luaL_checkint(L, 5);
683 unsigned int max_drop = luaL_checkint(L, 6);
684 algorithm algo = A_PLAIN_NP;
685 if(! lua_isnil(L, 7)) {
686 std::string algorithm = luaL_checkstring(L,7);
688 if (algorithm == "A*")
691 if (algorithm == "Dijkstra")
695 std::vector<v3s16> path =
696 get_Path(env,pos1,pos2,searchdistance,max_jump,max_drop,algo);
701 int top = lua_gettop(L);
702 unsigned int index = 1;
703 for (std::vector<v3s16>::iterator i = path.begin(); i != path.end();i++)
705 lua_pushnumber(L,index);
707 lua_settable(L, top);
716 int EnvRef::l_spawn_tree(lua_State *L)
718 EnvRef *o = checkobject(L, 1);
719 ServerEnvironment *env = o->m_env;
720 if(env == NULL) return 0;
721 v3s16 p0 = read_v3s16(L, 2);
723 treegen::TreeDef tree_def;
724 std::string trunk,leaves,fruit;
725 INodeDefManager *ndef = env->getGameDef()->ndef();
727 if(lua_istable(L, 3))
729 getstringfield(L, 3, "axiom", tree_def.initial_axiom);
730 getstringfield(L, 3, "rules_a", tree_def.rules_a);
731 getstringfield(L, 3, "rules_b", tree_def.rules_b);
732 getstringfield(L, 3, "rules_c", tree_def.rules_c);
733 getstringfield(L, 3, "rules_d", tree_def.rules_d);
734 getstringfield(L, 3, "trunk", trunk);
735 tree_def.trunknode=ndef->getId(trunk);
736 getstringfield(L, 3, "leaves", leaves);
737 tree_def.leavesnode=ndef->getId(leaves);
738 tree_def.leaves2_chance=0;
739 getstringfield(L, 3, "leaves2", leaves);
742 tree_def.leaves2node=ndef->getId(leaves);
743 getintfield(L, 3, "leaves2_chance", tree_def.leaves2_chance);
745 getintfield(L, 3, "angle", tree_def.angle);
746 getintfield(L, 3, "iterations", tree_def.iterations);
747 getintfield(L, 3, "random_level", tree_def.iterations_random_level);
748 getstringfield(L, 3, "trunk_type", tree_def.trunk_type);
749 getboolfield(L, 3, "thin_branches", tree_def.thin_branches);
750 tree_def.fruit_chance=0;
751 getstringfield(L, 3, "fruit", fruit);
754 tree_def.fruitnode=ndef->getId(fruit);
755 getintfield(L, 3, "fruit_chance",tree_def.fruit_chance);
757 getintfield(L, 3, "seed", tree_def.seed);
761 treegen::spawn_ltree (env, p0, ndef, tree_def);
766 EnvRef::EnvRef(ServerEnvironment *env):
769 //infostream<<"EnvRef created"<<std::endl;
774 //infostream<<"EnvRef destructing"<<std::endl;
777 // Creates an EnvRef and leaves it on top of stack
778 // Not callable from Lua; all references are created on the C side.
779 void EnvRef::create(lua_State *L, ServerEnvironment *env)
781 EnvRef *o = new EnvRef(env);
782 //infostream<<"EnvRef::create: o="<<o<<std::endl;
783 *(void **)(lua_newuserdata(L, sizeof(void *))) = o;
784 luaL_getmetatable(L, className);
785 lua_setmetatable(L, -2);
788 void EnvRef::set_null(lua_State *L)
790 EnvRef *o = checkobject(L, -1);
794 void EnvRef::Register(lua_State *L)
797 int methodtable = lua_gettop(L);
798 luaL_newmetatable(L, className);
799 int metatable = lua_gettop(L);
801 lua_pushliteral(L, "__metatable");
802 lua_pushvalue(L, methodtable);
803 lua_settable(L, metatable); // hide metatable from Lua getmetatable()
805 lua_pushliteral(L, "__index");
806 lua_pushvalue(L, methodtable);
807 lua_settable(L, metatable);
809 lua_pushliteral(L, "__gc");
810 lua_pushcfunction(L, gc_object);
811 lua_settable(L, metatable);
813 lua_pop(L, 1); // drop metatable
815 luaL_openlib(L, 0, methods, 0); // fill methodtable
816 lua_pop(L, 1); // drop methodtable
818 // Cannot be created from Lua
819 //lua_register(L, className, create_object);
822 const char EnvRef::className[] = "EnvRef";
823 const luaL_reg EnvRef::methods[] = {
824 luamethod(EnvRef, set_node),
825 luamethod(EnvRef, add_node),
826 luamethod(EnvRef, remove_node),
827 luamethod(EnvRef, get_node),
828 luamethod(EnvRef, get_node_or_nil),
829 luamethod(EnvRef, get_node_light),
830 luamethod(EnvRef, place_node),
831 luamethod(EnvRef, dig_node),
832 luamethod(EnvRef, punch_node),
833 luamethod(EnvRef, add_entity),
834 luamethod(EnvRef, add_item),
835 luamethod(EnvRef, add_rat),
836 luamethod(EnvRef, add_firefly),
837 luamethod(EnvRef, get_meta),
838 luamethod(EnvRef, get_node_timer),
839 luamethod(EnvRef, get_player_by_name),
840 luamethod(EnvRef, get_objects_inside_radius),
841 luamethod(EnvRef, set_timeofday),
842 luamethod(EnvRef, get_timeofday),
843 luamethod(EnvRef, find_node_near),
844 luamethod(EnvRef, find_nodes_in_area),
845 luamethod(EnvRef, get_perlin),
846 luamethod(EnvRef, get_perlin_map),
847 luamethod(EnvRef, clear_objects),
848 luamethod(EnvRef, spawn_tree),
849 luamethod(EnvRef, line_of_sight),
850 luamethod(EnvRef, find_path),
854 void scriptapi_environment_on_generated(lua_State *L, v3s16 minp, v3s16 maxp,
858 assert(lua_checkstack(L, 20));
859 //infostream<<"scriptapi_environment_on_generated"<<std::endl;
860 StackUnroller stack_unroller(L);
862 // Get minetest.registered_on_generateds
863 lua_getglobal(L, "minetest");
864 lua_getfield(L, -1, "registered_on_generateds");
868 lua_pushnumber(L, blockseed);
869 scriptapi_run_callbacks(L, 3, RUN_CALLBACKS_MODE_FIRST);
872 void scriptapi_environment_step(lua_State *L, float dtime)
875 assert(lua_checkstack(L, 20));
876 //infostream<<"scriptapi_environment_step"<<std::endl;
877 StackUnroller stack_unroller(L);
879 // Get minetest.registered_globalsteps
880 lua_getglobal(L, "minetest");
881 lua_getfield(L, -1, "registered_globalsteps");
883 lua_pushnumber(L, dtime);
884 scriptapi_run_callbacks(L, 1, RUN_CALLBACKS_MODE_FIRST);
887 void scriptapi_add_environment(lua_State *L, ServerEnvironment *env)
890 assert(lua_checkstack(L, 20));
891 verbosestream<<"scriptapi_add_environment"<<std::endl;
892 StackUnroller stack_unroller(L);
894 // Create EnvRef on stack
895 EnvRef::create(L, env);
896 int envref = lua_gettop(L);
898 // minetest.env = envref
899 lua_getglobal(L, "minetest");
900 luaL_checktype(L, -1, LUA_TTABLE);
901 lua_pushvalue(L, envref);
902 lua_setfield(L, -2, "env");
904 // Store environment as light userdata in registry
905 lua_pushlightuserdata(L, env);
906 lua_setfield(L, LUA_REGISTRYINDEX, "minetest_env");
909 Add ActiveBlockModifiers to environment
912 // Get minetest.registered_abms
913 lua_getglobal(L, "minetest");
914 lua_getfield(L, -1, "registered_abms");
915 luaL_checktype(L, -1, LUA_TTABLE);
916 int registered_abms = lua_gettop(L);
918 if(lua_istable(L, registered_abms)){
919 int table = lua_gettop(L);
921 while(lua_next(L, table) != 0){
922 // key at index -2 and value at index -1
923 int id = lua_tonumber(L, -2);
924 int current_abm = lua_gettop(L);
926 std::set<std::string> trigger_contents;
927 lua_getfield(L, current_abm, "nodenames");
928 if(lua_istable(L, -1)){
929 int table = lua_gettop(L);
931 while(lua_next(L, table) != 0){
932 // key at index -2 and value at index -1
933 luaL_checktype(L, -1, LUA_TSTRING);
934 trigger_contents.insert(lua_tostring(L, -1));
935 // removes value, keeps key for next iteration
938 } else if(lua_isstring(L, -1)){
939 trigger_contents.insert(lua_tostring(L, -1));
943 std::set<std::string> required_neighbors;
944 lua_getfield(L, current_abm, "neighbors");
945 if(lua_istable(L, -1)){
946 int table = lua_gettop(L);
948 while(lua_next(L, table) != 0){
949 // key at index -2 and value at index -1
950 luaL_checktype(L, -1, LUA_TSTRING);
951 required_neighbors.insert(lua_tostring(L, -1));
952 // removes value, keeps key for next iteration
955 } else if(lua_isstring(L, -1)){
956 required_neighbors.insert(lua_tostring(L, -1));
960 float trigger_interval = 10.0;
961 getfloatfield(L, current_abm, "interval", trigger_interval);
963 int trigger_chance = 50;
964 getintfield(L, current_abm, "chance", trigger_chance);
966 LuaABM *abm = new LuaABM(L, id, trigger_contents,
967 required_neighbors, trigger_interval, trigger_chance);
969 env->addActiveBlockModifier(abm);
971 // removes value, keeps key for next iteration