/// <summary>
/// This method is called by clients
/// of the <see cref="ISegmentIntersector" /> class to process
/// intersections for two segments of the <see cref="SegmentString" />s being intersected.
/// Note that some clients (such as <see cref="MonotoneChain" />s) may optimize away
/// this call for segment pairs which they have determined do not intersect
/// (e.g. by an disjoint envelope test).
/// </summary>
/// <param name="e0"></param>
/// <param name="segIndex0"></param>
/// <param name="e1"></param>
/// <param name="segIndex1"></param>
public void ProcessIntersections(SegmentString e0, int segIndex0, SegmentString e1, int segIndex1)
{
// don't bother intersecting a segment with itself
if (e0 == e1 && segIndex0 == segIndex1)
{
return;
}
ICoordinate p00 = e0.Coordinates[segIndex0];
ICoordinate p01 = e0.Coordinates[segIndex0 + 1];
ICoordinate p10 = e1.Coordinates[segIndex1];
ICoordinate p11 = e1.Coordinates[segIndex1 + 1];
li.ComputeIntersection(p00, p01, p10, p11);
if (li.HasIntersection)
{
if (li.IsInteriorIntersection())
{
for (int intIndex = 0; intIndex < li.IntersectionNum; intIndex++)
{
interiorIntersections.Add(li.GetIntersection(intIndex));
}
e0.AddIntersections(li, segIndex0, 0);
e1.AddIntersections(li, segIndex1, 1);
}
}
}
/// <summary>
/// This method is called by clients
/// of the <see cref="ISegmentIntersector" /> class to process
/// intersections for two segments of the <see cref="SegmentString" /> being intersected.
/// Note that some clients (such as <see cref="MonotoneChain" />s) may optimize away
/// this call for segment pairs which they have determined do not intersect
/// (e.g. by an disjoint envelope test).
/// </summary>
/// <param name="e0"></param>
/// <param name="segIndex0"></param>
/// <param name="e1"></param>
/// <param name="segIndex1"></param>
public void ProcessIntersections(SegmentString e0, int segIndex0, SegmentString e1, int segIndex1)
{
if (e0 == e1 && segIndex0 == segIndex1)
{
return;
}
NumTests++;
ICoordinate p00 = e0.Coordinates[segIndex0];
ICoordinate p01 = e0.Coordinates[segIndex0 + 1];
ICoordinate p10 = e1.Coordinates[segIndex1];
ICoordinate p11 = e1.Coordinates[segIndex1 + 1];
li.ComputeIntersection(p00, p01, p10, p11);
if (li.HasIntersection)
{
NumIntersections++;
if (li.IsInteriorIntersection())
{
NumInteriorIntersections++;
hasInterior = true;
}
// if the segments are adjacent they have at least one trivial intersection,
// the shared endpoint. Don't bother adding it if it is the
// only intersection.
if (!IsTrivialIntersection(e0, segIndex0, e1, segIndex1))
{
hasIntersection = true;
e0.AddIntersections(li, segIndex0, 0);
e1.AddIntersections(li, segIndex1, 1);
if (li.IsProper)
{
NumProperIntersections++;
hasProper = true;
hasProperInterior = true;
}
}
}
}