private void WriteWay(SWay way)
{
if (waysCount == 0)
{
writer.Write((byte)0);
}
waysCount++;
wayIdWriter.WriteZigZag(way.Id);
writer.Write7BitEncodedInt((ulong)way.WayType);
writer.Write7BitEncodedInt((ulong)way.Nodes.Count);
wayNodeIdWriter.Reset();
wayLatWriter.Reset();
wayLonWriter.Reset();
foreach (var node in way.Nodes)
{
wayNodesCount++;
wayNodeIdWriter.WriteZigZag((long)node.Id);
wayLatWriter.WriteZigZag(node.Lat);
wayLonWriter.WriteZigZag(node.Lon);
}
}
public void Add(SWay way)
{
foreach (var node in way.Nodes)
{
BoundingRect.Extend(node.Lat, node.Lon);
}
WriteWay(way);
}
public void Add(SWay way)
{
var split = FindBlock(way);
split.Block.Add(way);
if (split.Block.Size >= BlockLimit)
{
SplitBlock(split);
}
}
private SWay CreateSWay(OsmWay way, IReadOnlyList <MapNode> nodes)
{
var sway = new SWay
{
Id = way.Id,
WayType = GetWayType(way),
Nodes = nodes.Select(x => new WayNode((ulong)x.Id, x.Lat, x.Lon)).ToList()
};
return(sway);
}
public void WriteWay(SWay way)
{
if (way == null)
{
throw new ArgumentNullException(nameof(way));
}
WriteWayData(way);
AddOffsetsIndex((ulong)way.Id, infoStream.Position);
WriteWayInfo(way);
}
private SWay[] ReadAllWays()
{
var split = reader.ReadByte();
if (split != 0)
{
throw new InvalidOperationException("Not all ways were read.");
}
wayIdReader.Reset();
wayNodeIdReader.Reset();
wayLatReader.Reset();
wayLonReader.Reset();
var allWays = new SWay[waysCount];
for (var i = 0; i < allWays.Length; i++)
{
var id = wayIdReader.ReadZigZag();
var type = (int)reader.Read7BitEncodedInt();
var count = (int)reader.Read7BitEncodedInt();
wayLatReader.Reset();
wayLonReader.Reset();
var nodes = new List <WayNode>(count);
for (var j = 0; j < count; j++)
{
var nodeId = (ulong)wayNodeIdReader.ReadZigZag();
var lat = (int)wayLatReader.ReadZigZag();
var lon = (int)wayLonReader.ReadZigZag();
nodes.Add(new WayNode(
nodeId,
lat,
lon
));
}
var way = new SWay
{
Id = id,
WayType = type,
Nodes = nodes
};
allWays[i] = way;
}
return(allWays);
}
private void WriteWayInfo(SWay way)
{
infoWriter.Write7BitEncodedInt(way.Id);
var rect = way.Rect;
infoWriter.Write(rect.MinLat);
infoWriter.Write(rect.MinLon);
infoWriter.Write7BitEncodedInt(EncodeHelpers.EncodeZigZag(way.MidLat - rect.MinLat));
infoWriter.Write7BitEncodedInt(EncodeHelpers.EncodeZigZag(way.MidLon - rect.MinLon));
infoWriter.Write7BitEncodedInt(EncodeHelpers.EncodeZigZag(rect.MaxLat - way.MidLat));
infoWriter.Write7BitEncodedInt(EncodeHelpers.EncodeZigZag(rect.MaxLon - way.MidLon));
infoLength = infoStream.Position;
}
private void WriteWayData(SWay way)
{
idWriter.WriteIncrementOnly((ulong)way.Id);
var nodes = way.Nodes;
waysWriter.Write7BitEncodedInt((ulong)nodes.Count);
nodeIdWriter.Reset();
latWriter.Reset();
lonWriter.Reset();
foreach (var node in nodes)
{
nodeIdWriter.WriteZigZag(node.Id);
latWriter.WriteZigZag(node.Lat);
lonWriter.WriteZigZag(node.Lon);
}
}
