Esempio n. 1
0
        public LineSegment IntersectingSegmentWithLine([NotNull] Line line)
        {
            var n             = this.Edges.Count;
            var intersections = new Either <Null, Point, LineSegment> [n];

            for (int i = 0; i < n; i++)
            {
                intersections[i] = FastGeometry.IntersectLineAndSegment(line, this.Edges[i]);
                if (intersections[i].Is <LineSegment>(out var segment))
                {
                    return(segment);
                }
            }

            for (int current = 0; current < n; current++)
            {
                if (intersections[current].Is <Point>(out var currentIntersection))
                {
                    var previous = current == 0 ? n - 1 : current - 1;
                    if (intersections[previous].Is <Point>() &&
                        currentIntersection == this.Edges[current].BasePoint)
                    {
                        intersections[current] = Null.Instance;
                    }

                    var next = current == n - 1 ? 0 : current + 1;
                    if (intersections[next].Is <Point>() &&
                        currentIntersection == this.Edges[current].EndPoint)
                    {
                        intersections[current] = Null.Instance;
                    }
                }
            }

            var distinct = intersections
                           .Choose(intersection => (intersection.Is <Point>(out var point), point))
                           .ToList();

            return(distinct.Count == 2
                ? new LineSegment(distinct[0], distinct[1])
                : null);
        }
Esempio n. 2
0
 public Either <Null, Point, LineSegment> IntersectWithSegment([NotNull] LineSegment segment)
 {
     return(FastGeometry.IntersectLineAndSegment(this, segment));
 }
 /// <summary>
 /// Checks if this Vector intersects the given line and returns the point if it does or null otherwise
 /// </summary>
 /// <param name="line">The line to check if this intersects with</param>
 /// <returns>returns the intersection point of the two lines or null if they do not</returns>
 public Either <Null, Point, LineSegment> IntersectWithLine([NotNull] Line passedLine)
 {
     return(FastGeometry.IntersectLineAndSegment(passedLine, this));
 }