Initial NodeMetaRef stuff

This commit is contained in:
Perttu Ahola 2011-11-28 03:06:21 +02:00
parent 34bd1b3032
commit 0f2b932e92
3 changed files with 177 additions and 17 deletions

@ -44,6 +44,10 @@
-- - remove_node(pos)
-- - get_node(pos)
-- - add_luaentity(pos, name)
-- - get_meta(pos) -- Get a NodeMetaRef at that position
--
-- NodeMetaRef
-- - settext(text) -- eg. set the text of a sign
--
-- ObjectRef is basically ServerActiveObject.
-- ObjectRef methods:
@ -1359,7 +1363,8 @@ minetest.register_on_chat_message(function(name, message)
end
end)
minetest.register_abm({
-- Grow papyrus on TNT every 10 seconds
--[[minetest.register_abm({
nodenames = {"TNT"},
interval = 10.0,
chance = 1,
@ -1368,7 +1373,23 @@ minetest.register_abm({
pos.y = pos.y + 1
minetest.env:add_node(pos, {name="papyrus"})
end,
})
})]]
-- Replace texts of alls signs with "foo" every 10 seconds
--[[minetest.register_abm({
nodenames = {"sign_wall"},
interval = 10.0,
chance = 1,
action = function(pos, node, active_object_count, active_object_count_wider)
print("ABM: Sign text changed")
local meta = minetest.env:get_meta(pos)
meta:settext("foo")
end,
})]]
-- LuaNodeMetadata should support something like this
--meta.setvar("somevariable", {x=0, y=0, z=0})
--meta.getvar("somevariable") -> {x=0, y=0, z=0}
--
-- Done, print some random stuff

@ -40,14 +40,12 @@ extern "C" {
#include "craftdef.h"
#include "main.h" // For g_settings
#include "settings.h" // For accessing g_settings
#include "nodemetadata.h"
#include "mapblock.h" // For getNodeBlockPos
/*
TODO:
- Random node triggers (like grass growth)
- All kinds of callbacks
- Object visual client-side stuff
- Blink effect
- Spritesheets and animation
- LuaNodeMetadata
blockdef.metadata_name =
""
@ -62,7 +60,7 @@ TODO:
meta.set("owner", playername)
meta.get("owner")
- Item definition (actually, only CraftItem)
- (not scripting) Putting items in node metadata (virtual)
- Putting items in NodeMetadata (?)
*/
static void stackDump(lua_State *L, std::ostream &o)
@ -584,6 +582,7 @@ static int l_register_abm(lua_State *L)
if(lua_isnil(L, -1))
break;
lua_pop(L, 1);
id++;
}
lua_pop(L, 1);
@ -1038,10 +1037,135 @@ static void luaentity_get(lua_State *L, u16 id)
}
/*
Reference objects
Reference wrappers
*/
#define method(class, name) {#name, class::l_##name}
/*
NodeMetaRef
*/
class NodeMetaRef
{
private:
v3s16 m_p;
ServerEnvironment *m_env;
static const char className[];
static const luaL_reg methods[];
static NodeMetaRef *checkobject(lua_State *L, int narg)
{
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if(!ud) luaL_typerror(L, narg, className);
return *(NodeMetaRef**)ud; // unbox pointer
}
static NodeMetadata* getmeta(NodeMetaRef *ref)
{
NodeMetadata *meta = ref->m_env->getMap().getNodeMetadata(ref->m_p);
return meta;
}
static void reportMetadataChange(NodeMetaRef *ref)
{
// Inform other things that the metadata has changed
v3s16 blockpos = getNodeBlockPos(ref->m_p);
MapEditEvent event;
event.type = MEET_BLOCK_NODE_METADATA_CHANGED;
event.p = blockpos;
ref->m_env->getMap().dispatchEvent(&event);
// Set the block to be saved
MapBlock *block = ref->m_env->getMap().getBlockNoCreateNoEx(blockpos);
if(block)
block->raiseModified(MOD_STATE_WRITE_NEEDED, "l_settext");
}
// Exported functions
// garbage collector
static int gc_object(lua_State *L) {
NodeMetaRef *o = *(NodeMetaRef **)(lua_touserdata(L, 1));
delete o;
return 0;
}
// settext(self, text)
static int l_settext(lua_State *L)
{
NodeMetaRef *ref = checkobject(L, 1);
NodeMetadata *meta = getmeta(ref);
if(meta == NULL) return 0;
// Do it
std::string text = lua_tostring(L, 2);
meta->setText(text);
// Inform other things that the metadata has changed
reportMetadataChange(ref);
return 0;
}
public:
NodeMetaRef(v3s16 p, ServerEnvironment *env):
m_p(p),
m_env(env)
{
}
~NodeMetaRef()
{
}
// Creates an NodeMetaRef and leaves it on top of stack
// Not callable from Lua; all references are created on the C side.
static void create(lua_State *L, v3s16 p, ServerEnvironment *env)
{
NodeMetaRef *o = new NodeMetaRef(p, env);
//infostream<<"NodeMetaRef::create: o="<<o<<std::endl;
*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
}
static void Register(lua_State *L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable); // hide metatable from Lua getmetatable()
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pop(L, 1); // drop metatable
luaL_openlib(L, 0, methods, 0); // fill methodtable
lua_pop(L, 1); // drop methodtable
// Cannot be created from Lua
//lua_register(L, className, create_object);
}
};
const char NodeMetaRef::className[] = "NodeMetaRef";
const luaL_reg NodeMetaRef::methods[] = {
method(NodeMetaRef, settext),
{0,0}
};
/*
EnvRef
*/
class EnvRef
{
private:
@ -1129,6 +1253,19 @@ private:
return 0;
}
// EnvRef:get_meta(pos)
static int l_get_meta(lua_State *L)
{
infostream<<"EnvRef::l_get_meta()"<<std::endl;
EnvRef *o = checkobject(L, 1);
ServerEnvironment *env = o->m_env;
if(env == NULL) return 0;
// Do it
v3s16 p = readpos(L, 2);
NodeMetaRef::create(L, p, env);
return 1;
}
static int gc_object(lua_State *L) {
EnvRef *o = *(EnvRef **)(lua_touserdata(L, 1));
delete o;
@ -1198,9 +1335,14 @@ const luaL_reg EnvRef::methods[] = {
method(EnvRef, remove_node),
method(EnvRef, get_node),
method(EnvRef, add_luaentity),
method(EnvRef, get_meta),
{0,0}
};
/*
ObjectRef
*/
class ObjectRef
{
private:
@ -1537,10 +1679,9 @@ void scriptapi_export(lua_State *L, Server *server)
luaL_register(L, NULL, minetest_entity_m);
// Put other stuff in metatable
// Environment C reference
// Register reference wrappers
NodeMetaRef::Register(L);
EnvRef::Register(L);
// Object C reference
ObjectRef::Register(L);
}

@ -3190,12 +3190,10 @@ void Server::ProcessData(u8 *data, u32 datasize, u16 peer_id)
NodeMetadata *meta = m_env->getMap().getNodeMetadata(p);
if(!meta)
return;
if(meta->typeId() != LEGN(m_nodedef, "CONTENT_SIGN_WALL"))
return;
SignNodeMetadata *signmeta = (SignNodeMetadata*)meta;
signmeta->setText(text);
actionstream<<player->getName()<<" writes \""<<text<<"\" to sign "
meta->setText(text);
actionstream<<player->getName()<<" writes \""<<text<<"\" to sign"
<<" at "<<PP(p)<<std::endl;
v3s16 blockpos = getNodeBlockPos(p);