public virtual IEnumerable <IFeature> GetFeatures(IGeometry geometry, bool useCustomRenderers = true)
{
if (useCustomRenderers)
{
var customRenderer = CustomRenderers.FirstOrDefault();
if (customRenderer != null)
{
foreach (var feature in customRenderer.GetFeatures(geometry, this))
{
yield return(feature);
}
yield break;
}
}
var getAllMapFeatures = map == null || map.Envelope.Equals(geometry.EnvelopeInternal); // when all map features are asked - avoid time consuming geometry x geometry checks
if (UseQuadTree)
{
var features = GetFeaturesUsingQuadTree(geometry.EnvelopeInternal);
foreach (var feature in features)
{
// check if we're selecting subset of features, if so - use more robust intersection check (non-evelope based)
if (!getAllMapFeatures)
{
// log.DebugFormat("Checking geometry intersection for feature: " + feature.Attributes["NAME"]);
var g = feature.Geometry;
if (CoordinateTransformation != null)
{
g = GeometryTransform.TransformGeometry(g, CoordinateTransformation.MathTransform);
}
if (g.Intersects(geometry))
{
// log.DebugFormat("Intersected geometry found for feature: " + feature.Attributes["NAME"]);
yield return(feature);
}
}
else
{
yield return(feature);
}
}
}
else
{
var features = Enumerable.Empty <IFeature>();
var e = geometry.EnvelopeInternal;
if (CoordinateTransformation != null)
{
// BUG: this will not work, migrate it
features = DataSource.Features.Cast <IFeature>();
foreach (var feature in features)
{
var g = GeometryTransform.TransformGeometry(feature.Geometry, CoordinateTransformation.MathTransform);
if (!g.EnvelopeInternal.Intersects(geometry.EnvelopeInternal))
{
continue;
}
if (!getAllMapFeatures)
{
if (g.Intersects(geometry))
{
yield return(feature);
}
}
else
{
yield return(feature);
}
}
}
else
{
features = DataSource.Features.Cast <IFeature>().Where(feature => feature.Geometry != null && feature.Geometry.EnvelopeInternal.Intersects(e));
foreach (var feature in features)
{
if (!getAllMapFeatures)
{
if (feature.Geometry.Intersects(geometry))
{
yield return(feature);
}
}
else
{
yield return(feature);
}
}
}
}
}
