public void Add(OsmRelation relation, int typeId, IReadOnlyList <RelationItemInfo> itemInfos, BoundingRect rect)
{
if (relation == null)
{
throw new ArgumentNullException(nameof(relation));
}
if (itemInfos == null)
{
throw new ArgumentNullException(nameof(itemInfos));
}
if (rect == null)
{
throw new ArgumentNullException(nameof(rect));
}
startPositions.Add(new RelationLocation
{
Id = relation.Id,
Offset = stream.Position
});
idWriter.WriteIncrementOnly((ulong)relation.Id);
writer.Write7BitEncodedInt((ulong)typeId);
rect.WriteTo(writer);
writer.Write7BitEncodedInt((ulong)relation.Items.Count);
memberIdWriter.Reset();
memberMidLatWriter.Reset();
memberMidLonWriter.Reset();
for (var index = 0; index < relation.Items.Count; index++)
{
var member = relation.Items[index];
writer.Write((byte)member.MemberType);
memberIdWriter.WriteZigZag(member.Id);
writer.Write7BitEncodedInt(GetRoleId(member.Role));
var info = itemInfos[index];
memberMidLatWriter.WriteZigZag(info.MidLat);
memberMidLonWriter.WriteZigZag(info.MidLon);
}
}
public void ProcessPrimitives(PrimitiveAccessor accessor, string data)
{
if (accessor == null)
{
throw new ArgumentNullException(nameof(accessor));
}
var nodeIds = accessor.Relations
.SelectMany(x => x.Items)
.Where(i => i.MemberType == RelationMemberTypes.Node)
.Select(i => i.Id)
.Distinct()
.OrderBy(x => x);
var nodes = nodesIndex.ReadAllNodesById(nodeIds).ToDictionary(x => x.Id);
foreach (var relation in accessor.Relations)
{
var rect = new BoundingRect();
var itemInfos = new List <RelationItemInfo>();
foreach (var relationItem in relation.Items)
{
switch (relationItem.MemberType)
{
case RelationMemberTypes.Node:
if (!nodes.TryGetValue(relationItem.Id, out var node))
{
itemInfos.Add(new RelationItemInfo
{
Id = (ulong)relationItem.Id,
Type = relationItem.MemberType,
MidLat = int.MinValue,
MidLon = int.MinValue
});
}
else
{
rect.Extend(node.Lat, node.Lon);
itemInfos.Add(new RelationItemInfo
{
Id = (ulong)relationItem.Id,
Type = relationItem.MemberType,
MidLat = node.Lat,
MidLon = node.Lon
});
}
break;
case RelationMemberTypes.Way:
var way = waysData.FindWayInfo((ulong)relationItem.Id);
if (way == null)
{
itemInfos.Add(new RelationItemInfo
{
Id = (ulong)relationItem.Id,
Type = relationItem.MemberType,
MidLat = int.MinValue,
MidLon = int.MinValue
});
}
else
{
rect.Extend(way.Rect);
itemInfos.Add(new RelationItemInfo
{
Id = (ulong)relationItem.Id,
Type = relationItem.MemberType,
MidLat = int.MinValue,
MidLon = int.MinValue
});
}
break;
case RelationMemberTypes.Relation:
itemInfos.Add(new RelationItemInfo
{
Id = (ulong)relationItem.Id,
Type = relationItem.MemberType,
MidLat = 0,
MidLon = 0
});
// Relations will be assembled recursively.
break;
default:
throw new NotSupportedException("Unknown relation type.");
}
}
relationsFile.Add(relation, 0, itemInfos, rect); // ToDo: Implement type detection
}
}