void Tile::addThing(const ThingPtr& thing, int stackPos)
{
if(!thing)
return;
if(thing->isEffect()) {
m_effects.push_back(thing->static_self_cast<Effect>());
} else {
// priority 854
// 0 - ground, --> -->
// 1 - ground borders --> -->
// 2 - bottom (walls), --> -->
// 3 - on top (doors) --> -->
// 4 - creatures, from top to bottom <-- -->
// 5 - items, from top to bottom <-- <--
if(stackPos < 0 || stackPos == 255) {
int priority = thing->getStackPriority();
// -1 or 255 => auto detect position
// -2 => append
bool append;
if(stackPos == -2)
append = true;
else {
append = (priority <= 3);
// newer protocols does not store creatures in reverse order
if(g_game.getProtocolVersion() >= 854 && priority == 4)
append = !append;
}
for(stackPos = 0; stackPos < (int)m_things.size(); ++stackPos) {
int otherPriority = m_things[stackPos]->getStackPriority();
if((append && otherPriority > priority) || (!append && otherPriority >= priority))
break;
}
} else if(stackPos > (int)m_things.size())
stackPos = m_things.size();
m_things.insert(m_things.begin() + stackPos, thing);
if(m_things.size() > MAX_THINGS)
removeThing(m_things[MAX_THINGS]);
/*
// check stack priorities
// this code exists to find stackpos bugs faster
int lastPriority = 0;
for(const ThingPtr& thing : m_things) {
int priority = thing->getStackPriority();
assert(lastPriority <= priority);
lastPriority = priority;
}
*/
}
thing->setPosition(m_position);
thing->onAppear();
if(thing->isTranslucent())
checkTranslucentLight();
}
