// these are special implementations, all others delegate to the topo-graph.
internal static com.epl.geometry.Geometry PointMinusPolygon_(com.epl.geometry.Point point, com.epl.geometry.Polygon polygon, double tolerance, com.epl.geometry.ProgressTracker progress_tracker)
{
com.epl.geometry.PolygonUtils.PiPResult result = com.epl.geometry.PolygonUtils.IsPointInPolygon2D(polygon, point, tolerance);
if (result == com.epl.geometry.PolygonUtils.PiPResult.PiPOutside)
{
return(point);
}
return(point.CreateInstance());
}
// return the input point
internal static com.epl.geometry.Geometry PointMinusEnvelope_(com.epl.geometry.Point point, com.epl.geometry.Envelope envelope, double tolerance, com.epl.geometry.ProgressTracker progress_tracker)
{
com.epl.geometry.Envelope2D env = new com.epl.geometry.Envelope2D();
envelope.QueryEnvelope2D(env);
env.Inflate(tolerance, tolerance);
com.epl.geometry.Point2D pt = point.GetXY();
if (!env.Contains(pt))
{
return(point);
}
return(point.CreateInstance());
}
internal static com.epl.geometry.Geometry PointMinusPolyline_(com.epl.geometry.Point point, com.epl.geometry.Polyline polyline, double tolerance, com.epl.geometry.ProgressTracker progress_tracker)
{
com.epl.geometry.Point2D pt = point.GetXY();
com.epl.geometry.SegmentIterator seg_iter = polyline.QuerySegmentIterator();
double tolerance_cluster = tolerance * System.Math.Sqrt(2.0) * 1.00001;
double tolerance_cluster_sq = tolerance_cluster * tolerance_cluster;
com.epl.geometry.Envelope2D env = new com.epl.geometry.Envelope2D();
while (seg_iter.NextPath())
{
while (seg_iter.HasNextSegment())
{
com.epl.geometry.Segment segment = seg_iter.NextSegment();
segment.QueryEnvelope2D(env);
env.Inflate(tolerance_cluster, tolerance_cluster);
if (!env.Contains(pt))
{
continue;
}
if (segment.IsIntersecting(pt, tolerance))
{
return(point.CreateInstance());
}
// check segment end points to the cluster tolerance
com.epl.geometry.Point2D end_point = segment.GetStartXY();
if (com.epl.geometry.Point2D.SqrDistance(pt, end_point) <= tolerance_cluster_sq)
{
return(point.CreateInstance());
}
end_point = segment.GetEndXY();
if (com.epl.geometry.Point2D.SqrDistance(pt, end_point) <= tolerance_cluster_sq)
{
return(point.CreateInstance());
}
}
}
return(point);
}
internal static com.epl.geometry.Geometry PointMinusPoint_(com.epl.geometry.Point point_a, com.epl.geometry.Point point_b, double tolerance, com.epl.geometry.ProgressTracker progress_tracker)
{
double tolerance_cluster = tolerance * System.Math.Sqrt(2.0) * 1.00001;
double tolerance_cluster_sq = tolerance_cluster * tolerance_cluster;
com.epl.geometry.Point2D pt_a = point_a.GetXY();
com.epl.geometry.Point2D pt_b = point_b.GetXY();
if (com.epl.geometry.Point2D.SqrDistance(pt_a, pt_b) <= tolerance_cluster_sq)
{
return(point_a.CreateInstance());
}
// return empty point
return(point_a);
}
internal static com.epl.geometry.Geometry PointMinusMultiPoint_(com.epl.geometry.Point point, com.epl.geometry.MultiPoint multi_point, double tolerance, com.epl.geometry.ProgressTracker progress_tracker)
{
com.epl.geometry.MultiPointImpl multipointImpl = (com.epl.geometry.MultiPointImpl)(multi_point._getImpl());
com.epl.geometry.AttributeStreamOfDbl position = (com.epl.geometry.AttributeStreamOfDbl)multipointImpl.GetAttributeStreamRef(com.epl.geometry.VertexDescription.Semantics.POSITION);
int point_count = multi_point.GetPointCount();
com.epl.geometry.Point2D point2D = point.GetXY();
com.epl.geometry.Point2D pt = new com.epl.geometry.Point2D();
double tolerance_cluster = tolerance * System.Math.Sqrt(2.0) * 1.00001;
double tolerance_cluster_sq = tolerance_cluster * tolerance_cluster;
for (int i = 0; i < point_count; i++)
{
position.Read(2 * i, pt);
double sqr_dist = com.epl.geometry.Point2D.SqrDistance(pt, point2D);
if (sqr_dist <= tolerance_cluster_sq)
{
return(point.CreateInstance());
}
}
// return an empty point.
return(point);
}