public void Property_Segment2DIntersectionShouldBehaveTheSameAsSegment3DIntersection
(
Segment2D segment1,
Segment2D segment2
)
{
var intersection2D = segment1.IntersectWithSegment(segment2);
var intersection3D = segment1.To3D().IntersectWithSegment(segment2.To3D());
if (intersection2D.Is <Null>())
{
intersection3D.Is <Null>().Should().BeTrue();
}
if (intersection2D.Is <Point2D>(out var point2D))
{
intersection3D.Is <Point>().Should().BeTrue();
intersection3D.As <Point>().ToPoint2D().Should().Be(point2D);
}
if (intersection2D.Is <Segment2D>())
{
var segment2D = intersection2D.As <Segment2D>();
intersection3D.Is <LineSegment>().Should().BeTrue();
intersection3D.As <LineSegment>().ProjectTo2D().Should().Be(segment2D);
}
}
public void Property_IfSegmentsAreParallelAndIntersect_ItShouldBeAnEndPoint
(
Segment2D segment1,
Segment2D segment2
)
{
var intersection = segment1.IntersectWithSegment(segment2);
if (
segment1.GetDirection().IsParallelTo(segment2.GetDirection()) &&
intersection.Is <Point2D>(out var point2D))
{
var point = point2D.ToPoint3D();
var isEndOfOneOf = point.IsBaseOrEndPointOf(segment1.To3D()) ||
point.IsBaseOrEndPointOf(segment2.To3D());
isEndOfOneOf.Should().BeTrue();
}
}
public void Property_NonNullResultIfAnyEndPointIsWithinDistanceToleranceOfOtherSegment
(
Segment2D segment1,
Segment2D segment2
)
{
var intersection = segment1.IntersectWithSegment(segment2);
var ends = Enumerable
.Concat
(
segment1.EndPoints.Where(e => e.ToPoint3D().DistanceTo(segment2.To3D()) == ZeroDistance),
segment2.EndPoints.Where(e => e.ToPoint3D().DistanceTo(segment1.To3D()) == ZeroDistance)
)
.ToList();
if (ends.Any())
{
intersection.Should().NotBe(Null.Instance);
}
}
