/*
* Sphere Search is done iteratively in “Spheres” and is used to attempt to trace a path
* from the beginning to the end of the game. The first sphere s is simply all locations which are
* reachable from the beginning of the game. As it searches these locations, it adds key items
* found to a temporary set; we do not want those items to affect reachability until the next sphere
* iteration so we do not yet add them to I. After all reachable locations have been found, sphere s
* is added to the list of spheres S, and all items in the temporary set are added to I. It then
* iterates again with a new sphere s.
*/
public SphereSearchInfo SphereSearch(WorldGraph world)
{
SphereSearchInfo output = new SphereSearchInfo();
output.Spheres = new List <WorldGraph>();
List <Item> owneditems = new List <Item>();
//Initial sphere s0 includes items reachable from the start of the game
WorldGraph s0 = GetReachableLocations(world, owneditems);
owneditems = s0.CollectMajorItems(); //Collect all major items reachable from the start of the game
output.Spheres.Add(s0); //Add initial sphere to sphere list
//sx indicates every sphere after the first. Any major items found in s0 means sx should be bigger.
WorldGraph sx = GetReachableLocations(world, owneditems);
int temp = owneditems.Where(x => x.Importance >= 2).Count(); //Temp is the count of previously owned major items
owneditems = sx.CollectAllItems(); //Used to find new count of major items
//If counts are equal then no new major items found, stop searching
while (owneditems.Where(x => x.Importance >= 2).Count() > temp) //If new count is not greater than old count, that means all currently reachable locations have been found
{
output.Spheres.Add(sx); //If new locations found, add to sphere list
//Take the same steps taken before the loop: Get new reachable locations, collect new major items, and check to see if new count is larger than old count
sx = GetReachableLocations(world, owneditems);
temp = owneditems.Where(x => x.Importance >= 2).Count(); //Only want to consider count of major items
owneditems = sx.CollectAllItems();
}
//At this point, either a dead end has been found or all locations have been discovered
//If the goal item is in the list of owned items, means the end has been found and thus the game is completable
output.Completable = owneditems.Count(x => x.Name == world.GoalItemName) > 0;
return(output);
}
//This function outputs text for each sphere in the calculated sphere list
//To avoid redundancy, major items will not be printed more than once
//Sample output:
/*
* Sphere 0:
* Forest_Chest: Bow
* Forest_Quest: Magic
* Field_Hidden A: Bombs
* Field_Hidden B: Sword
* City_Quest: GateKey
*
* Sphere 1:
* Field_Hidden C: GrapplingHook
* Lake_Quest: Sling
*
* Sphere 2:
* Valley_Chest: Key
*
* Sphere 3:
* Dungeon_Boss: Goal
*
* Is Completable: True
*/
static void Print_Spheres(SphereSearchInfo input)
{
List <WorldGraph> spheres = input.Spheres;
List <Item> MajorItemsFound = new List <Item>(); //Keeps track of already printed items to avoid redundancy
int i = 0;
foreach (WorldGraph sphere in spheres) //Go through each sphere
{
Console.WriteLine(Environment.NewLine + "Sphere " + i + ":"); //Print the sphere index
i++;
List <Item> majors = sphere.CollectAllItems().Where(x => x.Importance >= 2).ToList(); //Only check for major items
foreach (Item m in majors)
{
if (!MajorItemsFound.Contains(m)) //Check if each major item has been printed already; if not print
{
MajorItemsFound.Add(m);
//This loop is used to find the location of the item so that it may be printed as well
Location l = new Location();
foreach (Region r in sphere.Regions)
{
if (r.Locations.Count(x => x.Item == m) > 0)
{
l = r.Locations.First(x => x.Item == m);
}
}
Console.WriteLine(l.Name + ": " + m.Name); //Print the item location and name
}
}
}
Console.WriteLine(Environment.NewLine + "Is Completable: " + input.Completable + Environment.NewLine); //After finishing, print if completable or not
}