private static ReferenceLineIntersectionResult GetReferenceLineIntersectionsResult(IEnumerable <Segment2D> surfaceLineSegments,
IEnumerable <Segment2D> referenceLineSegments)
{
Point2D intersectionPoint = null;
foreach (Segment2D surfaceLineSegment in surfaceLineSegments)
{
foreach (Segment2D referenceLineSegment in referenceLineSegments)
{
Segment2DIntersectSegment2DResult result = Math2D.GetIntersectionBetweenSegments(surfaceLineSegment, referenceLineSegment);
if (result.IntersectionType == Intersection2DType.Intersects)
{
Point2D resultIntersectionPoint = result.IntersectionPoints[0];
if (intersectionPoint != null && !intersectionPoint.Equals(resultIntersectionPoint))
{
// Early exit as multiple intersections is a return result:
return(ReferenceLineIntersectionResult.CreateMultipleIntersectionsOrOverlapResult());
}
intersectionPoint = resultIntersectionPoint;
}
if (result.IntersectionType == Intersection2DType.Overlaps)
{
// Early exit as overlap is a return result:
return(ReferenceLineIntersectionResult.CreateMultipleIntersectionsOrOverlapResult());
}
}
}
return(intersectionPoint != null
? ReferenceLineIntersectionResult.CreateIntersectionResult(intersectionPoint)
: ReferenceLineIntersectionResult.CreateNoSingleIntersectionResult());
}
/// <summary>
/// Finds out if there is an intersection of the <paramref name="surfaceLine"/> and
/// the <paramref name="referenceLine"/>.
/// </summary>
/// <param name="surfaceLine">The surface line.</param>
/// <param name="referenceLine">The reference line.</param>
/// <returns>A new <see cref="ReferenceLineIntersectionResult"/> with a type of intersection and
/// possibly an intersection point, if there was only one found.</returns>
/// <exception cref="ArgumentNullException">Thrown when any parameter is <c>null</c>.</exception>
/// <exception cref="ImportedDataTransformException">Thrown when the surface line:
/// <list type="bullet">
/// <item>has no intersections with the reference line;</item>
/// <item>has more than one intersection with the reference line.</item>
/// </list>
/// </exception>
public static Point2D GetSingleReferenceLineIntersection(this SurfaceLine surfaceLine, ReferenceLine referenceLine)
{
if (surfaceLine == null)
{
throw new ArgumentNullException(nameof(surfaceLine));
}
if (referenceLine == null)
{
throw new ArgumentNullException(nameof(referenceLine));
}
ReferenceLineIntersectionResult result = GetReferenceLineIntersections(referenceLine, surfaceLine);
if (result.TypeOfIntersection == ReferenceLineIntersectionsResult.NoIntersections)
{
string message = string.Format(Resources.SurfaceLineExtensions_GetSingleReferenceLineIntersection_SurfaceLine_0_does_not_correspond_to_current_referenceline_Could_be_caused_coordinates_being_local_coordinate_system,
surfaceLine.Name);
throw new ImportedDataTransformException(message);
}
if (result.TypeOfIntersection == ReferenceLineIntersectionsResult.MultipleIntersectionsOrOverlap)
{
string message = string.Format(Resources.SurfaceLineExtensions_GetSingleReferenceLineIntersection_SurfaceLine_0_does_not_correspond_to_current_referenceline, surfaceLine.Name);
throw new ImportedDataTransformException(message);
}
return(result.IntersectionPoint);
}
