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Revert patch 58f036a that causes object duplication (which tried to f…

…ix objects getting hidden from client) and fix the original problem correctly. This fixes the second distinct object duplication bug.
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celeron55 authored and kwolekr committed Nov 17, 2013
1 parent b2d9205 commit 21789ccc5f2e372fe462e54944fef3a31c790110
Showing with 60 additions and 23 deletions.
  1. +60 −23 src/environment.cpp
@@ -1417,8 +1417,8 @@ void ServerEnvironment::getAddedActiveObjects(v3s16 pos, s16 radius,
ServerActiveObject *object = i->second;
if(object == NULL)
continue;
// Discard if removed
if(object->m_removed)
// Discard if removed or deactivating
if(object->m_removed || object->m_pending_deactivation)
continue;
if(object->unlimitedTransferDistance() == false){
// Discard if too far
@@ -1468,7 +1468,7 @@ void ServerEnvironment::getRemovedActiveObjects(v3s16 pos, s16 radius,
continue;
}

if(object->m_removed)
if(object->m_removed || object->m_pending_deactivation)
{
removed_objects.insert(id);
continue;
@@ -1556,21 +1556,19 @@ u16 ServerEnvironment::addActiveObjectRaw(ServerActiveObject *object,
StaticObject s_obj(object->getType(), objectpos, staticdata);
// Add to the block where the object is located in
v3s16 blockpos = getNodeBlockPos(floatToInt(objectpos, BS));
MapBlock *block = m_map->getBlockNoCreateNoEx(blockpos);
if(block)
{
MapBlock *block = m_map->emergeBlock(blockpos);
if(block){
block->m_static_objects.m_active[object->getId()] = s_obj;
object->m_static_exists = true;
object->m_static_block = blockpos;

if(set_changed)
block->raiseModified(MOD_STATE_WRITE_NEEDED,
"addActiveObjectRaw");
}
else{
} else {
v3s16 p = floatToInt(objectpos, BS);
errorstream<<"ServerEnvironment::addActiveObjectRaw(): "
<<"could not find block for storing id="<<object->getId()
<<"could not emerge block for storing id="<<object->getId()
<<" statically (pos="<<PP(p)<<")"<<std::endl;
}
}
@@ -1616,18 +1614,39 @@ void ServerEnvironment::removeRemovedObjects()
if (block) {
block->m_static_objects.remove(id);
block->raiseModified(MOD_STATE_WRITE_NEEDED,
"removeRemovedObjects");
"removeRemovedObjects/remove");
obj->m_static_exists = false;
} else {
infostream << "failed to emerge block from which "
"an object to be removed was loaded from. id="<<id<<std::endl;
infostream<<"Failed to emerge block from which an object to "
<<"be removed was loaded from. id="<<id<<std::endl;
}
}

// If m_known_by_count > 0, don't actually remove.
// If m_known_by_count > 0, don't actually remove. On some future
// invocation this will be 0, which is when removal will continue.
if(obj->m_known_by_count > 0)
continue;


/*
Move static data from active to stored if not marked as removed
*/
if(obj->m_static_exists && !obj->m_removed){
MapBlock *block = m_map->emergeBlock(obj->m_static_block, false);
if (block) {
std::map<u16, StaticObject>::iterator i =
block->m_static_objects.m_active.find(id);
if(i != block->m_static_objects.m_active.end()){
block->m_static_objects.m_stored.push_back(i->second);
block->m_static_objects.m_active.erase(id);
block->raiseModified(MOD_STATE_WRITE_NEEDED,
"removeRemovedObjects/deactivate");
}
} else {
infostream<<"Failed to emerge block from which an object to "
<<"be deactivated was loaded from. id="<<id<<std::endl;
}
}

// Tell the object about removal
obj->removingFromEnvironment();
// Deregister in scripting api
@@ -1708,10 +1727,9 @@ void ServerEnvironment::activateObjects(MapBlock *block, u32 dtime_s)
"large amount of objects");
return;
}
// A list for objects that couldn't be converted to active for some
// reason. They will be stored back.

// Activate stored objects
std::list<StaticObject> new_stored;
// Loop through stored static objects
for(std::list<StaticObject>::iterator
i = block->m_static_objects.m_stored.begin();
i != block->m_static_objects.m_stored.end(); ++i)
@@ -1750,6 +1768,19 @@ void ServerEnvironment::activateObjects(MapBlock *block, u32 dtime_s)
StaticObject &s_obj = *i;
block->m_static_objects.m_stored.push_back(s_obj);
}

// Turn the active counterparts of activated objects not pending for
// deactivation
for(std::map<u16, StaticObject>::iterator
i = block->m_static_objects.m_active.begin();
i != block->m_static_objects.m_active.end(); ++i)
{
u16 id = i->first;
ServerActiveObject *object = getActiveObject(id);
assert(object);
object->m_pending_deactivation = false;
}

/*
Note: Block hasn't really been modified here.
The objects have just been activated and moved from the stored
@@ -1910,6 +1941,8 @@ void ServerEnvironment::deactivateFarObjects(bool force_delete)
block = m_map->emergeBlock(blockpos);
} catch(InvalidPositionException &e){
// Handled via NULL pointer
// NOTE: emergeBlock's failure is usually determined by it
// actually returning NULL
}

if(block)
@@ -1923,17 +1956,21 @@ void ServerEnvironment::deactivateFarObjects(bool force_delete)
<<" Forcing delete."<<std::endl;
force_delete = true;
} else {
// If static counterpart already exists, remove it first.
// This shouldn't happen, but happens rarely for some
// unknown reason. Unsuccessful attempts have been made to
// find said reason.
// If static counterpart already exists in target block,
// remove it first.
// This shouldn't happen because the object is removed from
// the previous block before this according to
// obj->m_static_block, but happens rarely for some unknown
// reason. Unsuccessful attempts have been made to find
// said reason.
if(id && block->m_static_objects.m_active.find(id) != block->m_static_objects.m_active.end()){
infostream<<"ServerEnv: WARNING: Performing hack #83274"
<<std::endl;
block->m_static_objects.remove(id);
}
//store static data
block->m_static_objects.insert(0, s_obj);
// Store static data
u16 store_id = pending_delete ? id : 0;
block->m_static_objects.insert(store_id, s_obj);

// Only mark block as modified if data changed considerably
if(shall_be_written)

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