[Pure] public LinesIntersection2?Intersects(LineSegment2 segment)
{
GetCorners(out Vector2 a, out Vector2 b, out Vector2 c, out Vector2 d);
var abi = segment.Intersects(new LineSegment2(a, b));
var bci = segment.Intersects(new LineSegment2(b, c));
var cdi = segment.Intersects(new LineSegment2(c, d));
var dai = segment.Intersects(new LineSegment2(d, a));
var min = abi;
if (bci.HasValue && (!min.HasValue || bci.Value.DistanceAlongA < min.Value.DistanceAlongA))
{
min = bci;
}
if (cdi.HasValue && (!min.HasValue || cdi.Value.DistanceAlongA < min.Value.DistanceAlongA))
{
min = cdi;
}
if (dai.HasValue && (!min.HasValue || dai.Value.DistanceAlongA < min.Value.DistanceAlongA))
{
min = dai;
}
return(min);
}
public void AssertThat_LineSegmentRayIntersection_FindsCorrectIntersection()
{
var i = new LineSegment2(new Vector2(0, 0), new Vector2(10, 0)).Intersects(new Ray2(new Vector2(5, 5), new Vector2(0, 1)));
Assert.IsTrue(i.HasValue);
Assert.AreEqual(new Vector2(5, 0), i.Value.Position);
Assert.AreEqual(0.5f, i.Value.DistanceAlongA);
Assert.AreEqual(-5, i.Value.DistanceAlongB);
}
public LinesIntersection2?Intersects(LineSegment2 segment, out Parallelism parallelism)
{
var intersection = LongLine.Intersects(segment.LongLine, out parallelism);
if (!intersection.HasValue)
{
return(null);
}
if (intersection.Value.DistanceAlongA < 0 || intersection.Value.DistanceAlongA > 1)
{
return(null);
}
if (intersection.Value.DistanceAlongB < 0 || intersection.Value.DistanceAlongB > 1)
{
return(null);
}
return(intersection);
}
public LinesIntersection2? Intersects(LineSegment2 segment)
{
Parallelism _;
return Intersects(segment, out _);
}
public LinesIntersection2? Intersects(LineSegment2 segment, out Parallelism parallelism)
{
var intersection = LongLine.Intersects(segment.LongLine, out parallelism);
if (!intersection.HasValue)
return null;
if (intersection.Value.DistanceAlongA <= 0 || intersection.Value.DistanceAlongA >= 1)
return null;
if (intersection.Value.DistanceAlongB <= 0 || intersection.Value.DistanceAlongB >= 1)
return null;
return intersection;
}
/// <summary>
/// Determines whether the specified LineSegment2 is equal to the current Ray.
/// </summary>
/// <param name="other">The LineSegment2 to compare with the current LineSegment2.</param>
public bool Equals(LineSegment2 other)
{
return Start.Equals(other.Start) && End.Equals(other.End);
}
/// <summary>
/// Determines whether the specified LineSegment2 is equal to the current Ray.
/// </summary>
/// <param name="other">The LineSegment2 to compare with the current LineSegment2.</param>
public bool Equals(LineSegment2 other)
{
return(Start.Equals(other.Start) && End.Equals(other.End));
}
public LinesIntersection2?Intersects(LineSegment2 segment)
{
return(Intersects(segment, out Parallelism _));
}