/// <summary> /// Interprets an OSM-object and returns the corresponding geometry. /// </summary> /// <param name="osmObject"></param> /// <returns></returns> public abstract GeometryCollection Interpret(CompleteOsmGeo osmObject);
/// <summary>
/// Translates OSM objects into basic renderable primitives.
/// </summary>
/// <param name="scene">The scene to add primitives to.</param>
/// <param name="projection">The projection used to convert the objects.</param>
/// <param name="osmGeo">The osm object.</param>
/// <returns></returns>
public override void Translate(Scene2D scene, IProjection projection, CompleteOsmGeo osmGeo)
{
// set the scene backcolor.
scene.BackColor = this.GetCanvasColor().Value;
if (osmGeo == null) { return; }
// store the object count.
int countBefore = scene.Count;
// interpret the osm-objects.
switch (osmGeo.Type)
{
case CompleteOsmType.Node:
this.TranslateNode(scene, projection, osmGeo as CompleteNode);
break;
case CompleteOsmType.Way:
this.TranslateWay(scene, projection, osmGeo as CompleteWay);
break;
case CompleteOsmType.Relation:
this.TranslateRelation(scene, projection, osmGeo as CompleteRelation);
break;
case CompleteOsmType.ChangeSet:
break;
default:
throw new ArgumentOutOfRangeException();
}
// interpret the osmGeo object and check if it makes up an area.
GeometryCollection collection = _geometryInterpreter.Interpret(osmGeo);
foreach (Geometry geometry in collection)
{
if (geometry is LineairRing)
{ // a simple lineair ring.
this.TranslateLineairRing(scene, projection, geometry as LineairRing);
}
else if (geometry is Polygon)
{ // a simple polygon.
this.TranslatePolygon(scene, projection, geometry as Polygon);
}
else if (geometry is MultiPolygon)
{ // a multipolygon.
this.TranslateMultiPolygon(scene, projection, geometry as MultiPolygon);
}
}
// check if any objects have been added to the scene.
if (scene.Count <= countBefore)
{ // no objects have been added. Apply default styles if needed.
if (osmGeo.Type == CompleteOsmType.Node &&
_mapCSSFile != null &&
_mapCSSFile.DefaultPoints)
{ // apply default points style.
CompleteNode node = (osmGeo as CompleteNode);
scene.AddPoint(this.CalculateSceneLayer(OffsetPoint, 0), float.MinValue, float.MaxValue,
projection.LongitudeToX(node.Coordinate.Longitude), projection.LatitudeToY(node.Coordinate.Latitude),
SimpleColor.FromKnownColor(KnownColor.Black).Value, 2);
}
else if (osmGeo.Type == CompleteOsmType.Way &&
_mapCSSFile != null &&
_mapCSSFile.DefaultLines)
{ // apply default lines style.
CompleteWay way = (osmGeo as CompleteWay);
// get x/y.
double[] x = null, y = null;
if (x == null)
{ // pre-calculate x/y.
x = new double[way.Nodes.Count];
y = new double[way.Nodes.Count];
for (int idx = 0; idx < way.Nodes.Count; idx++)
{
x[idx] = projection.LongitudeToX(
way.Nodes[idx].Coordinate.Longitude);
y[idx] = projection.LatitudeToY(
way.Nodes[idx].Coordinate.Latitude);
}
// simplify.
if (x.Length > 2)
{
double[][] simplified = SimplifyCurve.Simplify(new double[][] { x, y }, 0.0001);
x = simplified[0];
y = simplified[1];
}
}
scene.AddLine(this.CalculateSceneLayer(OffsetLine, 0), float.MinValue, float.MaxValue,
x, y, SimpleColor.FromKnownColor(KnownColor.Red).Value, 1, LineJoin.Round, null);
}
}
}
/// <summary>
/// Creates a new MapCSS object with a compete osmgeo object.
/// </summary>
/// <param name="osmGeoComplete"></param>
public MapCSSObject(CompleteOsmGeo osmGeoComplete)
{
if (osmGeoComplete == null) throw new ArgumentNullException();
this.OsmGeoComplete = osmGeoComplete;
}
/// <summary> /// Translates the given OSM objects into corresponding geometries. /// </summary> /// <param name="projection">The projection to use.</param> /// <param name="osmGeo">The osm object.</param> /// <param name="scene">The scene to fill with the resulting geometries.</param> /// <returns></returns> public abstract void Translate(Scene2D scene, IProjection projection, CompleteOsmGeo osmGeo);
/// <summary>
/// Creates a new change object.
/// </summary>
/// <param name="type"></param>
/// <param name="obj"></param>
public CompleteChange(ChangeType type, CompleteOsmGeo obj)
{
_type = type;
_obj = obj;
}
/// <summary>
/// Creates a new change object.
/// </summary>
/// <param name="type"></param>
/// <param name="obj"></param>
public CompleteChange(ChangeType type, CompleteOsmGeo obj)
{
_type = type;
_obj = obj;
}
/// <summary>
/// Evaluates the filter against the osm object.
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public bool Evaluate(CompleteOsmGeo obj)
{
return this.Evaluate(obj.ToSimple());
}
