// Load a system's description.
void System::Load(const DataNode &node, Set<Planet> &planets)
{
if(node.Size() < 2)
return;
name = node.Token(1);
// If this is truly a change and not just being called by Load(), these sets
// of objects will be entirely replaced by any new ones, rather than adding
// the new ones on to the end of the list:
bool resetLinks = !links.empty();
bool resetAsteroids = !asteroids.empty();
bool resetFleets = !fleets.empty();
bool resetObjects = !objects.empty();
for(const DataNode &child : node)
{
if(child.Token(0) == "pos" && child.Size() >= 3)
position.Set(child.Value(1), child.Value(2));
else if(child.Token(0) == "government" && child.Size() >= 2)
government = GameData::Governments().Get(child.Token(1));
else if(child.Token(0) == "link")
{
if(resetLinks)
{
resetLinks = false;
links.clear();
}
if(child.Size() >= 2)
links.push_back(GameData::Systems().Get(child.Token(1)));
}
else if(child.Token(0) == "habitable" && child.Size() >= 2)
habitable = child.Value(1);
else if(child.Token(0) == "asteroids")
{
if(resetAsteroids)
{
resetAsteroids = false;
asteroids.clear();
}
if(child.Size() >= 4)
asteroids.emplace_back(child.Token(1), child.Value(2), child.Value(3));
}
else if(child.Token(0) == "trade" && child.Size() >= 3)
trade[child.Token(1)].SetBase(child.Value(2));
else if(child.Token(0) == "fleet")
{
if(resetFleets)
{
resetFleets = false;
fleets.clear();
}
if(child.Size() >= 3)
fleets.emplace_back(GameData::Fleets().Get(child.Token(1)), child.Value(2));
}
else if(child.Token(0) == "object")
{
if(resetObjects)
{
for(StellarObject &object : objects)
if(object.GetPlanet())
{
Planet *planet = planets.Get(object.GetPlanet()->Name());
planet->RemoveSystem(this);
}
resetObjects = false;
objects.clear();
}
LoadObject(child, planets);
}
else
child.PrintTrace("Skipping unrecognized attribute:");
}
// Set planet messages based on what zone they are in.
for(StellarObject &object : objects)
{
if(object.message || object.planet)
continue;
const StellarObject *root = &object;
while(root->parent >= 0)
root = &objects[root->parent];
static const string STAR = "You cannot land on a star!";
static const string HOTPLANET = "This planet is too hot to land on.";
static const string COLDPLANET = "This planet is too cold to land on.";
static const string UNINHABITEDPLANET = "This planet is uninhabited.";
static const string HOTMOON = "This moon is too hot to land on.";
static const string COLDMOON = "This moon is too cold to land on.";
static const string UNINHABITEDMOON = "This moon is uninhabited.";
static const string STATION = "This station cannot be docked with.";
double fraction = root->distance / habitable;
if(object.IsStar())
object.message = &STAR;
else if (object.IsStation())
object.message = &STATION;
else if (object.IsMoon())
{
if(fraction < .5)
object.message = &HOTMOON;
else if(fraction >= 2.)
object.message = &COLDMOON;
else
object.message = &UNINHABITEDMOON;
}
else
{
if(fraction < .5)
object.message = &HOTPLANET;
else if(fraction >= 2.)
object.message = &COLDPLANET;
else
object.message = &UNINHABITEDPLANET;
}
}
}
