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Scripting: Allow multiple global step callbacks and improve documentation

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This commit is contained in:
Perttu Ahola 2011-11-12 19:19:58 +02:00
parent 7b802c547d
commit f8c9b70379
2 changed files with 89 additions and 15 deletions
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52
src/scriptapi.cpp
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@ -170,8 +170,35 @@ static int l_register_entity(lua_State *L)
return 0; /* number of results */
}
// Register a global step function
// register_globalstep(function)
static int l_register_globalstep(lua_State *L)
{
luaL_checktype(L, 1, LUA_TFUNCTION);
infostream<<"register_globalstep"<<std::endl;
lua_getglobal(L, "table");
lua_getfield(L, -1, "insert");
int table_insert = lua_gettop(L);
// Get minetest.registered_globalsteps
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_globalsteps");
luaL_checktype(L, -1, LUA_TTABLE);
int registered_globalsteps = lua_gettop(L);
// table.insert(registered_globalsteps, func)
lua_pushvalue(L, table_insert);
lua_pushvalue(L, registered_globalsteps);
lua_pushvalue(L, 1); // push function from argument 1
// Call insert
if(lua_pcall(L, 2, 0, 0))
script_error(L, "error: %s\n", lua_tostring(L, -1));
return 0; /* number of results */
}
static const struct luaL_Reg minetest_f [] = {
{"register_entity", l_register_entity},
{"register_globalstep", l_register_globalstep},
{NULL, NULL}
};
@ -566,6 +593,9 @@ void scriptapi_export(lua_State *L, Server *server)
lua_newtable(L);
lua_setfield(L, -2, "registered_entities");
lua_newtable(L);
lua_setfield(L, -2, "registered_globalsteps");
lua_newtable(L);
lua_setfield(L, -2, "object_refs");
@ -684,12 +714,22 @@ void scriptapi_environment_step(lua_State *L, float dtime)
//infostream<<"scriptapi_luaentity_step: id="<<id<<std::endl;
StackUnroller stack_unroller(L);
lua_getglobal(L, "on_step");
if(lua_type(L, -1) != LUA_TFUNCTION)
return; // If no on_step function exist, do nothing
lua_pushnumber(L, dtime);
if(lua_pcall(L, 1, 0, 0))
script_error(L, "error: %s\n", lua_tostring(L, -1));
// Get minetest.registered_globalsteps
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_globalsteps");
luaL_checktype(L, -1, LUA_TTABLE);
int table = lua_gettop(L);
// Foreach
lua_pushnil(L);
while(lua_next(L, table) != 0){
// key at index -2 and value at index -1
luaL_checktype(L, -1, LUA_TFUNCTION);
// Call function
lua_pushnumber(L, dtime);
if(lua_pcall(L, 1, 0, 0))
script_error(L, "error: %s\n", lua_tostring(L, -1));
// value removed, keep key for next iteration
}
}
/*