public CompressedTile AddTile(TileCacheData data, CompressedTileFlagTypes flags)
{
// Make sure the data is in right format.
var header = data.Header;
if (header.Magic != DetourTileCache.DT_TILECACHE_MAGIC)
{
throw new EngineException("DT_WRONG_MAGIC");
}
if (header.Version != DetourTileCache.DT_TILECACHE_VERSION)
{
throw new EngineException("DT_WRONG_VERSION");
}
// Make sure the location is free.
if (GetTileAt(header.TX, header.TY, header.TLayer) != null)
{
throw new EngineException("DT_FAILURE");
}
// Allocate a tile.
CompressedTile tile = null;
if (m_nextFreeTile != null)
{
tile = m_nextFreeTile;
m_nextFreeTile = tile.Next;
tile.Next = null;
}
else
{
tile = new CompressedTile();
}
// Insert tile into the position lut.
int h = Detour.ComputeTileHash(header.TX, header.TY, m_tileLutMask);
tile.Next = m_posLookup[h];
m_posLookup[h] = tile;
// Init tile.
tile.Header = data.Header;
tile.Data = data.Data;
tile.Flags = flags;
return(tile);
}
private CompressedTile GetTileAt(int tx, int ty, int tlayer)
{
// Find tile based on hash.
int h = Detour.ComputeTileHash(tx, ty, m_tileLutMask);
var tile = m_posLookup[h];
while (tile != null)
{
if (tile.Header.TX == tx &&
tile.Header.TY == ty &&
tile.Header.TLayer == tlayer)
{
return(tile);
}
tile = tile.Next;
}
return(null);
}
public int GetTilesAt(int tx, int ty, out CompressedTile[] tiles, int maxTiles)
{
tiles = new CompressedTile[maxTiles];
int n = 0;
// Find tile based on hash.
int h = Detour.ComputeTileHash(tx, ty, m_tileLutMask);
var tile = m_posLookup[h];
while (tile != null)
{
if (tile.Header.TX == tx && tile.Header.TY == ty && n < maxTiles)
{
tiles[n++] = tile;
}
tile = tile.Next;
}
return(n);
}