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Add minetest.register_lbm() to run code on block load only

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This commit is contained in:
est31 2016-02-09 07:08:31 +01:00
parent 88fbe7ca1e
commit d494733839
12 changed files with 493 additions and 25 deletions
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55
src/script/cpp_api/s_env.cpp
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@ -86,13 +86,12 @@ void ScriptApiEnv::initializeEnvironment(ServerEnvironment *env)
setEnv(env);
/*
Add ActiveBlockModifiers to environment
Add {Loading,Active}BlockModifiers to environment
*/
// Get core.registered_abms
lua_getglobal(L, "core");
lua_getfield(L, -1, "registered_abms");
luaL_checktype(L, -1, LUA_TTABLE);
int registered_abms = lua_gettop(L);
if(lua_istable(L, registered_abms)){
@ -154,6 +153,58 @@ void ScriptApiEnv::initializeEnvironment(ServerEnvironment *env)
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
} else {
lua_pop(L, 1);
throw LuaError("core.registered_abms was not a lua table, as expected.");
}
lua_pop(L, 1);
// Get core.registered_lbms
lua_getglobal(L, "core");
lua_getfield(L, -1, "registered_lbms");
int registered_lbms = lua_gettop(L);
if (!lua_istable(L, registered_lbms)) {
lua_pop(L, 1);
throw LuaError("core.registered_lbms was not a lua table, as expected.");
}
lua_pushnil(L);
while (lua_next(L, registered_lbms)) {
// key at index -2 and value at index -1
int id = lua_tonumber(L, -2);
int current_lbm = lua_gettop(L);
std::set<std::string> trigger_contents;
lua_getfield(L, current_lbm, "nodenames");
if (lua_istable(L, -1)) {
int table = lua_gettop(L);
lua_pushnil(L);
while (lua_next(L, table)) {
// key at index -2 and value at index -1
luaL_checktype(L, -1, LUA_TSTRING);
trigger_contents.insert(lua_tostring(L, -1));
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
} else if (lua_isstring(L, -1)) {
trigger_contents.insert(lua_tostring(L, -1));
}
lua_pop(L, 1);
std::string name;
getstringfield(L, current_lbm, "name", name);
bool run_at_every_load = getboolfield_default(L, current_lbm,
"run_at_every_load", false);
LuaLBM *lbm = new LuaLBM(L, id, trigger_contents, name,
run_at_every_load);
env->addLoadingBlockModifierDef(lbm);
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
lua_pop(L, 1);
}