public SegmentPart([NotNull] ISegmentProxy segmentProxy,
double minFraction,
double maxFraction,
bool complete)
: this(
segmentProxy.PartIndex, segmentProxy.SegmentIndex, minFraction, maxFraction,
complete)
{
_segmentProxy = segmentProxy;
}
private static bool?GetOnRightSide(
[NotNull] SegmentProxy nearestSegment, double nearestFraction,
[NotNull] SegmentProxy segmentProxy, double alongFraction,
[NotNull] IGeometry baseGeometry)
{
if (nearestSegment.PartIndex != segmentProxy.PartIndex)
{
return(null);
}
SegmentProxy from;
SegmentProxy to;
if (nearestFraction >= 1)
{
if (alongFraction > 0)
{
return(null);
}
ISegmentProxy next = nearestSegment.GetNextSegment(baseGeometry);
if (next == null)
{
return(null);
}
if (next.SegmentIndex != segmentProxy.SegmentIndex)
{
return(null);
}
from = nearestSegment;
to = segmentProxy;
}
else if (nearestFraction <= 0)
{
if (alongFraction < 1)
{
return(null);
}
ISegmentProxy next = segmentProxy.GetNextSegment(baseGeometry);
if (next == null)
{
return(null);
}
if (next.SegmentIndex != nearestSegment.SegmentIndex)
{
return(null);
}
from = segmentProxy;
to = nearestSegment;
}
else
{
// unexpected
return(null);
}
Pnt vectorFrom = from.GetEnd(as3D: false) - from.GetStart(as3D: false);
Pnt vectorTo = to.GetEnd(as3D: false) - to.GetStart(as3D: false);
bool onRightSide = vectorFrom.VectorProduct(vectorTo) > 0;
return(onRightSide);
}
