public void CreatePage(int quadKey)
{
//不重复生成
rwl.EnterReadLock();
try
{
if (AddressMapping.ContainsKey(quadKey) && AddressMapping[quadKey].tileStatus == TileStatus.Loading)
{
return;
}
}
finally
{
rwl.ExitReadLock();
}
PhysicalTileInfo info = new PhysicalTileInfo();
info.tileStatus = TileStatus.Loading;
rwl.EnterWriteLock();
try
{
info.QuadKey = quadKey;
AddressMapping[quadKey] = info;
tileGenerator.GeneratePageTask(quadKey);
}
finally
{
rwl.ExitWriteLock();
}
}
//找到最深miplevel的可用quadtree page
private int SearchPage(int x, int y, int targetMip, int quadKey)
{
if (!Contains(x, y, quadKey))
{
return(-1);
}
int currMip = getMip(quadKey);
if (currMip > targetMip)
{
int[] childs = getChilds(quadKey);
foreach (var child in childs)
{
int page = SearchPage(x, y, targetMip, child);
if (page != -1)
{
return(page);
}
}
}
rwl.EnterReadLock();
try
{
if (AddressMapping.ContainsKey(quadKey) && AddressMapping[quadKey].tileStatus == TileStatus.LoadingComplete)
{
return(quadKey);
}
else
{
return(-1);
}
}
finally
{
rwl.ExitReadLock();
}
//找到指定深度
}