/// <summary>
/// Loads a vertex and returns true if found.
/// </summary>
/// <param name="vertexId"></param>
/// <param name="latitude"></param>
/// <param name="longitude"></param>
/// <returns></returns>
private bool LoadVertex(uint vertexId, out float latitude, out float longitude)
{
uint blockId = CHBlock.CalculateId(vertexId, _blockSize);
CHBlock block;
if (!_blocks.TryGet(blockId, out block))
{ // damn block not cached!
block = this.DeserializeBlock(blockId);
if (block == null)
{ // oops even now the block is not found!
longitude = 0;
latitude = 0;
return(false);
}
_blocks.Add(blockId, block);
}
uint blockIdx = vertexId - blockId;
if (block.Vertices != null &&
blockIdx < block.Vertices.Length)
{ // block is found and the vertex is there!
latitude = block.Vertices[blockIdx].Latitude;
longitude = block.Vertices[blockIdx].Longitude;
return(true);
}
// oops even now the block is not found!
longitude = 0;
latitude = 0;
return(false);
}
/// <summary>
/// Loads all arcs associated with the given vertex.
/// </summary>
/// <param name="vertexId"></param>
/// <returns></returns>
private KeyValuePair <uint, CHEdgeData>[] LoadArcs(uint vertexId)
{
uint blockId = CHBlock.CalculateId(vertexId, _blockSize);
CHBlock block;
if (!_blocks.TryGet(blockId, out block))
{ // damn block not cached!
block = this.DeserializeBlock(blockId);
if (block == null)
{ // oops even now the block is not found!
return(new KeyValuePair <uint, CHEdgeData> [0]);
}
_blocks.Add(blockId, block);
}
uint blockIdx = vertexId - blockId;
if (block.Vertices != null &&
blockIdx < block.Vertices.Length)
{ // block is found and the vertex is there!
KeyValuePair <uint, CHEdgeData>[] arcs = new KeyValuePair <uint, CHEdgeData> [
block.Vertices[blockIdx].ArcCount];
for (int arcIdx = block.Vertices[blockIdx].ArcIndex;
arcIdx < block.Vertices[blockIdx].ArcIndex + block.Vertices[blockIdx].ArcCount; arcIdx++)
{ // loop over all arcs.
CHArc chArc = block.Arcs[arcIdx];
CHEdgeData edgeData = new CHEdgeData();
edgeData.Direction = chArc.Direction;
edgeData.ContractedVertexId = chArc.ShortcutId;
edgeData.Weight = chArc.Weight;
edgeData.Tags = chArc.TagsId;
arcs[arcIdx - block.Vertices[blockIdx].ArcIndex] = new KeyValuePair <uint, CHEdgeData>(
chArc.TargetId, edgeData);
}
return(arcs);
}
// oops even now the block is not found!
return(new KeyValuePair <uint, CHEdgeData> [0]);
}