private void CheckForChunkEvict()
{
lock (this)
{
if (ActiveChunks.Count < 25)
{
return;
}
GraphChunk evict = null;
foreach (GraphChunk gc in ActiveChunks)
{
if (evict == null || gc.LRU < evict.LRU)
{
evict = gc;
}
}
// It is full!
evict.Save(BaseDir + "\\" + Continent + "\\");
ActiveChunks.Remove(evict);
chunks.Clear(evict.ix, evict.iy);
evict.Clear();
}
}
public Spot GetSpot2D(float x, float y)
{
LoadChunk(x, y);
GraphChunk gc = GetChunkAt(x, y);
return(gc.GetSpot2D(x, y));
}
public Spot GetSpot(float x, float y, float z)
{
LoadChunk(x, y);
GraphChunk gc = GetChunkAt(x, y);
return(gc.GetSpot(x, y, z));
}
public Spot AddSpot(Spot s)
{
LoadChunk(s.X, s.Y);
GraphChunk gc = GetChunkAt(s.X, s.Y);
return(gc.AddSpot(s));
}
private GraphChunk GetChunkAt(float x, float y)
{
int ix, iy;
GetChunkCoord(x, y, out ix, out iy);
GraphChunk c = chunks.Get(ix, iy);
if (c != null)
{
c.LRU = LRU++;
}
return(c);
}
// Create and load from file if exisiting
private void LoadChunk(float x, float y)
{
GraphChunk gc = GetChunkAt(x, y);
if (gc == null)
{
int ix, iy;
GetChunkCoord(x, y, out ix, out iy);
float base_x, base_y;
GetChunkBase(ix, iy, out base_x, out base_y);
gc = new GraphChunk(base_x, base_y, ix, iy);
gc.LRU = LRU++;
CheckForChunkEvict();
gc.Load(BaseDir + "\\" + Continent + "\\");
chunks.Set(ix, iy, gc);
ActiveChunks.Add(gc);
}
}
public List <Spot> FindAllSpots(float min_x, float min_y, float max_x, float max_y)
{
// hmm, do it per chunk
List <Spot> l = new List <Spot>();
for (float mx = min_x; mx <= max_x + GraphChunk.CHUNK_SIZE - 1; mx += GraphChunk.CHUNK_SIZE)
{
for (float my = min_y; my <= max_y + GraphChunk.CHUNK_SIZE - 1; my += GraphChunk.CHUNK_SIZE)
{
LoadChunk(mx, my);
GraphChunk gc = GetChunkAt(mx, my);
List <Spot> sl = gc.GetAllSpots();
foreach (Spot s in sl)
{
if (s.X >= min_x && s.X <= max_x &&
s.Y >= min_y && s.Y <= max_y)
{
l.Add(s);
}
}
}
}
return(l);
}
// Create and load from file if exisiting
private void LoadChunk(float x, float y)
{
GraphChunk gc = GetChunkAt(x, y);
if (gc == null)
{
int ix, iy;
GetChunkCoord(x, y, out ix, out iy);
float base_x, base_y;
GetChunkBase(ix, iy, out base_x, out base_y);
gc = new GraphChunk(base_x, base_y, ix, iy);
gc.LRU = LRU++;
CheckForChunkEvict();
gc.Load(BaseDir + "\\" + Continent + "\\");
chunks.Set(ix, iy, gc);
ActiveChunks.Add(gc);
}
}