/// <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.
/// Notice 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++;
Coordinate p00 = e0.Coordinates[segIndex0];
Coordinate p01 = e0.Coordinates[segIndex0 + 1];
Coordinate p10 = e1.Coordinates[segIndex1];
Coordinate p11 = e1.Coordinates[segIndex1 + 1];
_li.ComputeIntersection(p00, p01, p10, p11);
if (!_li.HasIntersection) return;
_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)) return;
_hasIntersection = true;
e0.AddIntersections(_li, segIndex0);
e1.AddIntersections(_li, segIndex1);
if (!_li.IsProper) return;
_numProperIntersections++;
_hasProper = true;
_hasProperInterior = true;
}
/// <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.
/// Notice 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;
Coordinate p00 = e0.Coordinates[segIndex0];
Coordinate p01 = e0.Coordinates[segIndex0 + 1];
Coordinate p10 = e1.Coordinates[segIndex1];
Coordinate 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);
e1.AddIntersections(_li, segIndex1);
}
}
}