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