/// <summary>
/// Fills the scene with objects from the given datasource that existing inside the given boundingbox with the given projection.
/// </summary>
/// <param name="dataSource"></param>
/// <param name="box"></param>
/// <param name="projection"></param>
public void FillScene(IDataSourceReadOnly dataSource, GeoCoordinateBox box, IProjection projection)
{
foreach (var osmGeo in dataSource.Get(box, null))
{ // translate each object into scene object.
LongIndex index = null;
switch (osmGeo.Type)
{
case Osm.OsmGeoType.Node:
index = _interpretedNodes;
break;
case Osm.OsmGeoType.Way:
index = _interpretedWays;
break;
case Osm.OsmGeoType.Relation:
index = _interpretedRelations;
break;
}
if (!index.Contains(osmGeo.Id.Value))
{ // object was not yet interpreted.
index.Add(osmGeo.Id.Value);
_interpreter.Translate(_scene, projection, dataSource, osmGeo);
}
}
}
/// <summary>
/// Moves to the next item.
/// </summary>
/// <returns></returns>
public bool MoveNext()
{
if (_current == null)
{
_current = this.FindHighest();
_index.Add(_current.Vertex);
_currentCount = 1;
return(_current != null);
}
// search for the next arc.
KeyValuePair <uint, CHEdgeData>[] edges = _graph.GetEdges(_current.Vertex);
int arcIdx = _current.ArcIdx;
arcIdx++;
while (arcIdx < edges.Length)
{ // check if it is 'lower'.
if (edges[arcIdx].Value.ToLower &&
!_index.Contains(edges[arcIdx].Key))
{ // yes the arc is 'lower' take it!
_current.ArcIdx = arcIdx; // move the arcIdx.
Position newPosition = new Position();
newPosition.Parent = _current;
newPosition.ArcIdx = -1;
newPosition.Vertex = edges[arcIdx].Key;
newPosition.Depth = _current.Depth + 1;
_current = newPosition;
_index.Add(_current.Vertex);
_currentCount++;
return(true);
}
arcIdx++; // move to the next arc.
}
// move to parent.
if (_current.Parent != null)
{ // set parent as current and move next.
_current = _current.Parent;
return(this.MoveNext());
}
// also enumerate all the other 'islands' of vertices unconnected to the current vertices.
return(this.MoveToNextIsland());
}
/// <summary>
/// Moves to the next object.
/// </summary>
/// <returns></returns>
public override bool MoveNext()
{
if (!_includeExtraMode)
{ // just go over all nodes and ways.
if (this.Source.MoveNext())
{
bool finished = false;
bool isIn = false;
// move to the next object of the current type.
while (this.Current().Type != _currentType)
{
if (!this.Source.MoveNext())
{
finished = true;
break;
}
}
if (!finished)
{
while (this.Current().Type == _currentType && !isIn)
{
OsmGeo current = this.Source.Current();
isIn = this.IsInBB(current); // check and keep the extras.
if (isIn)
{
// add to the actual in-boundingbox indexes.
switch (current.Type)
{
case OsmGeoType.Node:
_nodesIn.Add(current.Id.Value);
break;
case OsmGeoType.Way:
_waysIn.Add(current.Id.Value);
break;
case OsmGeoType.Relation:
_relationIn.Add(current.Id.Value);
break;
}
break;
}
// move to the next object of the current type.
if (!this.Source.MoveNext())
{
finished = true;
break;
}
while (this.Current().Type != _currentType)
{
if (!this.Source.MoveNext())
{
finished = true;
break;
}
}
// stop when finished.
if (finished)
{
break;
}
}
}
if (!finished && this.Current().Type == _currentType)
{ // nothing was finished and the types match.
return(true);
}
}
// switch to the next mode.
switch (_currentType)
{
case OsmGeoType.Node:
this.Source.Reset();
_currentType = OsmGeoType.Way;
return(this.MoveNext());
case OsmGeoType.Way:
this.Source.Reset();
_currentType = OsmGeoType.Relation;
return(this.MoveNext());
case OsmGeoType.Relation:
this.Source.Reset();
_includeExtraMode = true;
return(this.MoveNext());
}
throw new InvalidOperationException("Unkown SimpleOsmGeoType");
}
else
{
while (this.Source.MoveNext())
{
switch (this.Source.Current().Type)
{
case OsmGeoType.Node:
if (_nodesToInclude.Contains(this.Source.Current().Id.Value))
{
if (!_nodesIn.Contains(this.Source.Current().Id.Value))
{
return(true);
}
}
break;
case OsmGeoType.Way:
if (_waysToInclude.Contains(this.Source.Current().Id.Value))
{
if (!_waysIn.Contains(this.Source.Current().Id.Value))
{
return(true);
}
}
break;
case OsmGeoType.Relation:
if (_relationsToInclude.Contains(this.Source.Current().Id.Value))
{
if (!_relationIn.Contains(this.Source.Current().Id.Value))
{
return(true);
}
}
break;
}
}
return(false);
}
}
/// <summary>
/// Returns true if the given object is relevant in the bounding box.
/// </summary>
/// <param name="osmGeo"></param>
/// <returns></returns>
private bool IsInBB(OsmGeo osmGeo)
{
bool isIn = false;
switch (osmGeo.Type)
{
case OsmGeoType.Node:
isIn = _box.Contains(new GeoCoordinate(
(osmGeo as Node).Latitude.Value,
(osmGeo as Node).Longitude.Value));
break;
case OsmGeoType.Way:
foreach (long nodeId in (osmGeo as Way).Nodes)
{
if (_nodesIn.Contains(nodeId))
{
isIn = true;
break;
}
}
if (isIn)
{
foreach (long nodeId in (osmGeo as Way).Nodes)
{
_nodesToInclude.Add(nodeId);
}
}
break;
case OsmGeoType.Relation:
if (!_relationsConsidered.Contains(osmGeo.Id.Value))
{
foreach (RelationMember member in (osmGeo as Relation).Members)
{
switch (member.MemberType.Value)
{
case OsmGeoType.Node:
if (_nodesIn.Contains(member.MemberId.Value))
{
isIn = true;
break;
}
break;
case OsmGeoType.Way:
if (_waysIn.Contains(member.MemberId.Value))
{
isIn = true;
break;
}
break;
case OsmGeoType.Relation:
if (_relationIn.Contains(member.MemberId.Value))
{
isIn = true;
break;
}
break;
}
}
if (isIn)
{
foreach (RelationMember member in (osmGeo as Relation).Members)
{
switch (member.MemberType.Value)
{
case OsmGeoType.Node:
_nodesToInclude.Add(member.MemberId.Value);
break;
case OsmGeoType.Way:
_waysToInclude.Add(member.MemberId.Value);
break;
case OsmGeoType.Relation:
_relationsToInclude.Add(member.MemberId.Value);
break;
}
}
}
}
break;
}
return(isIn);
}
/// <summary>
/// Moves to the next object.
/// </summary>
/// <returns></returns>
private bool DoMoveNext()
{
while (this.Source.MoveNext())
{
// check the type and check if the source is sorted.
var current = this.Source.Current();
switch (current.Type)
{
case OsmGeoType.Node:
if (_currentType != OsmGeoType.Node)
{ // source is not sorted, a node appeared after a way/relation.
throw new OsmStreamNotSortedException("OsmStreamFilterPoly - Source stream is not sorted.");
}
var node = current as Node;
if (this.IsInsidePoly(node.Latitude.Value, node.Longitude.Value))
{ // keep this node.
_nodesIn.Add(node.Id.Value);
return(true);
}
break;
case OsmGeoType.Way:
if (_currentType == OsmGeoType.Relation)
{ // source is not sorted, a way appeared after a relation.
throw new OsmStreamNotSortedException("OsmStreamFilterPoly - Source stream is not sorted.");
}
if (_currentType == OsmGeoType.Node)
{ // switch type to way.
_currentType = OsmGeoType.Way;
}
var way = current as Way;
if (way.Nodes != null)
{
for (var i = 0; i < way.Nodes.Count; i++)
{
if (_nodesIn.Contains(way.Nodes[i]))
{
_waysIn.Add(way.Id.Value);
return(true);
}
}
}
break;
case OsmGeoType.Relation:
if (_currentType == OsmGeoType.Way || _currentType == OsmGeoType.Node)
{ // switch type to way.
_currentType = OsmGeoType.Relation;
}
var relation = current as Relation;
if (relation.Members != null)
{
for (var i = 0; i < relation.Members.Count; i++)
{
var member = relation.Members[i];
switch (member.MemberType.Value)
{
case OsmGeoType.Node:
if (_nodesIn.Contains(member.MemberId.Value))
{
return(true);
}
break;
case OsmGeoType.Way:
if (_waysIn.Contains(member.MemberId.Value))
{
return(true);
}
break;
}
}
}
break;
}
}
return(false);
}
