src/script/cpp_api/s_env.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 "cpp_api/s_env.h"
  21 #include "cpp_api/s_internal.h"
  22 #include "common/c_converter.h"
  23 #include "log.h"
  24 #include "environment.h"
  25 #include "mapgen.h"
  26 #include "lua_api/l_env.h"
  27 #include "server.h"
  28
  29 void ScriptApiEnv::environment_OnGenerated(v3s16 minp, v3s16 maxp,
  30                 u32 blockseed)
  31 {
  32         SCRIPTAPI_PRECHECKHEADER
  33
  34         // Get minetest.registered_on_generateds
  35         lua_getglobal(L, "minetest");
  36         lua_getfield(L, -1, "registered_on_generateds");
  37         // Call callbacks
  38         push_v3s16(L, minp);
  39         push_v3s16(L, maxp);
  40         lua_pushnumber(L, blockseed);
  41         script_run_callbacks(L, 3, RUN_CALLBACKS_MODE_FIRST);
  42 }
  43
  44 void ScriptApiEnv::environment_Step(float dtime)
  45 {
  46         SCRIPTAPI_PRECHECKHEADER
  47         //infostream<<"scriptapi_environment_step"<<std::endl;
  48
  49         // Get minetest.registered_globalsteps
  50         lua_getglobal(L, "minetest");
  51         lua_getfield(L, -1, "registered_globalsteps");
  52         // Call callbacks
  53         lua_pushnumber(L, dtime);
  54         try {
  55                 script_run_callbacks(L, 1, RUN_CALLBACKS_MODE_FIRST);
  56         } catch (LuaError &e) {
  57                 getServer()->setAsyncFatalError(e.what());
  58         }
  59 }
  60
  61 void ScriptApiEnv::environment_OnMapgenInit(MapgenParams *mgparams)
  62 {
  63         SCRIPTAPI_PRECHECKHEADER
  64
  65         // Get minetest.registered_on_mapgen_inits
  66         lua_getglobal(L, "minetest");
  67         lua_getfield(L, -1, "registered_on_mapgen_inits");
  68
  69         // Call callbacks
  70         lua_newtable(L);
  71
  72         lua_pushstring(L, mgparams->mg_name.c_str());
  73         lua_setfield(L, -2, "mgname");
  74
  75         lua_pushinteger(L, mgparams->seed);
  76         lua_setfield(L, -2, "seed");
  77
  78         lua_pushinteger(L, mgparams->water_level);
  79         lua_setfield(L, -2, "water_level");
  80
  81         std::string flagstr = writeFlagString(mgparams->flags,
  82                 flagdesc_mapgen, (u32)-1);
  83         lua_pushstring(L, flagstr.c_str());
  84         lua_setfield(L, -2, "flags");
  85
  86         script_run_callbacks(L, 1, RUN_CALLBACKS_MODE_FIRST);
  87 }
  88
  89 void ScriptApiEnv::initializeEnvironment(ServerEnvironment *env)
  90 {
  91         SCRIPTAPI_PRECHECKHEADER
  92         verbosestream<<"scriptapi_add_environment"<<std::endl;
  93         setEnv(env);
  94
  95         /*
  96                 Add ActiveBlockModifiers to environment
  97         */
  98
  99         // Get minetest.registered_abms
 100         lua_getglobal(L, "minetest");
 101         lua_getfield(L, -1, "registered_abms");
 102         luaL_checktype(L, -1, LUA_TTABLE);
 103         int registered_abms = lua_gettop(L);
 104
 105         if(lua_istable(L, registered_abms)){
 106                 int table = lua_gettop(L);
 107                 lua_pushnil(L);
 108                 while(lua_next(L, table) != 0){
 109                         // key at index -2 and value at index -1
 110                         int id = lua_tonumber(L, -2);
 111                         int current_abm = lua_gettop(L);
 112
 113                         std::set<std::string> trigger_contents;
 114                         lua_getfield(L, current_abm, "nodenames");
 115                         if(lua_istable(L, -1)){
 116                                 int table = lua_gettop(L);
 117                                 lua_pushnil(L);
 118                                 while(lua_next(L, table) != 0){
 119                                         // key at index -2 and value at index -1
 120                                         luaL_checktype(L, -1, LUA_TSTRING);
 121                                         trigger_contents.insert(lua_tostring(L, -1));
 122                                         // removes value, keeps key for next iteration
 123                                         lua_pop(L, 1);
 124                                 }
 125                         } else if(lua_isstring(L, -1)){
 126                                 trigger_contents.insert(lua_tostring(L, -1));
 127                         }
 128                         lua_pop(L, 1);
 129
 130                         std::set<std::string> required_neighbors;
 131                         lua_getfield(L, current_abm, "neighbors");
 132                         if(lua_istable(L, -1)){
 133                                 int table = lua_gettop(L);
 134                                 lua_pushnil(L);
 135                                 while(lua_next(L, table) != 0){
 136                                         // key at index -2 and value at index -1
 137                                         luaL_checktype(L, -1, LUA_TSTRING);
 138                                         required_neighbors.insert(lua_tostring(L, -1));
 139                                         // removes value, keeps key for next iteration
 140                                         lua_pop(L, 1);
 141                                 }
 142                         } else if(lua_isstring(L, -1)){
 143                                 required_neighbors.insert(lua_tostring(L, -1));
 144                         }
 145                         lua_pop(L, 1);
 146
 147                         float trigger_interval = 10.0;
 148                         getfloatfield(L, current_abm, "interval", trigger_interval);
 149
 150                         int trigger_chance = 50;
 151                         getintfield(L, current_abm, "chance", trigger_chance);
 152
 153                         LuaABM *abm = new LuaABM(L, id, trigger_contents,
 154                                         required_neighbors, trigger_interval, trigger_chance);
 155
 156                         env->addActiveBlockModifier(abm);
 157
 158                         // removes value, keeps key for next iteration
 159                         lua_pop(L, 1);
 160                 }
 161         }
 162         lua_pop(L, 1);
 163 }