1 files changed, 42 insertions, 9 deletions

diff --git a/src/script/lua_api/l_vmanip.cpp b/src/script/lua_api/l_vmanip.cpp
index e040e545b..6187a47db 100644
--- a/src/script/lua_api/l_vmanip.cpp
+++ b/src/script/lua_api/l_vmanip.cpp
@@ -17,11 +17,12 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-
+#include <map>
 #include "lua_api/l_vmanip.h"
 #include "lua_api/l_internal.h"
 #include "common/c_content.h"
 #include "common/c_converter.h"
+#include "common/c_packer.h"
 #include "emerge.h"
 #include "environment.h"
 #include "map.h"
@@ -45,6 +46,8 @@ int LuaVoxelManip::l_read_from_map(lua_State *L)
 
 	LuaVoxelManip *o = checkobject(L, 1);
 	MMVManip *vm = o->vm;
+	if (vm->isOrphan())
+		return 0;
 
 	v3s16 bp1 = getNodeBlockPos(check_v3s16(L, 2));
 	v3s16 bp2 = getNodeBlockPos(check_v3s16(L, 3));
@@ -112,23 +115,23 @@ int LuaVoxelManip::l_write_to_map(lua_State *L)
 
 	LuaVoxelManip *o = checkobject(L, 1);
 	bool update_light = !lua_isboolean(L, 2) || readParam<bool>(L, 2);
+
 	GET_ENV_PTR;
 	ServerMap *map = &(env->getServerMap());
+
+	std::map<v3s16, MapBlock*> modified_blocks;
 	if (o->is_mapgen_vm || !update_light) {
-		o->vm->blitBackAll(&(o->modified_blocks));
+		o->vm->blitBackAll(&modified_blocks);
 	} else {
-		voxalgo::blit_back_with_light(map, o->vm,
-			&(o->modified_blocks));
+		voxalgo::blit_back_with_light(map, o->vm, &modified_blocks);
 	}
 
 	MapEditEvent event;
 	event.type = MEET_OTHER;
-	for (const auto &modified_block : o->modified_blocks)
-		event.modified_blocks.insert(modified_block.first);
-
+	for (const auto &it : modified_blocks)
+		event.modified_blocks.insert(it.first);
 	map->dispatchEvent(event);
 
-	o->modified_blocks.clear();
 	return 0;
 }
 
@@ -166,7 +169,7 @@ int LuaVoxelManip::l_update_liquids(lua_State *L)
 
 	LuaVoxelManip *o = checkobject(L, 1);
 
-	Map *map = &(env->getMap());
+	ServerMap *map = &(env->getServerMap());
 	const NodeDefManager *ndef = getServer(L)->getNodeDefManager();
 	MMVManip *vm = o->vm;
 
@@ -429,6 +432,34 @@ LuaVoxelManip *LuaVoxelManip::checkobject(lua_State *L, int narg)
 	return *(LuaVoxelManip **)ud;  // unbox pointer
 }
 
+void *LuaVoxelManip::packIn(lua_State *L, int idx)
+{
+	LuaVoxelManip *o = checkobject(L, idx);
+
+	if (o->is_mapgen_vm)
+		throw LuaError("nope");
+	return o->vm->clone();
+}
+
+void LuaVoxelManip::packOut(lua_State *L, void *ptr)
+{
+	MMVManip *vm = reinterpret_cast<MMVManip*>(ptr);
+	if (!L) {
+		delete vm;
+		return;
+	}
+
+	// Associate vmanip with map if the Lua env has one
+	Environment *env = getEnv(L);
+	if (env)
+		vm->reparent(&(env->getMap()));
+
+	LuaVoxelManip *o = new LuaVoxelManip(vm, false);
+	*(void **)(lua_newuserdata(L, sizeof(void *))) = o;
+	luaL_getmetatable(L, className);
+	lua_setmetatable(L, -2);
+}
+
 void LuaVoxelManip::Register(lua_State *L)
 {
 	lua_newtable(L);
@@ -455,6 +486,8 @@ void LuaVoxelManip::Register(lua_State *L)
 
 	// Can be created from Lua (VoxelManip())
 	lua_register(L, className, create_object);
+
+	script_register_packer(L, className, packIn, packOut);
 }
 
 const char LuaVoxelManip::className[] = "VoxelManip";