private static void ClassifyIntersection([NotNull] ISegmentList source,
[NotNull] ISegmentList target,
[NotNull] IntersectionPoint3D intersectionPoint,
out bool isInbound,
out bool isOutbound)
{
Assert.False(intersectionPoint.Type == IntersectionPointType.Unknown,
"Cannot classify unknown intersection type.");
if (intersectionPoint.Type ==
IntersectionPointType.LinearIntersectionIntermediate)
{
isInbound = false;
isOutbound = false;
return;
}
int?previousTargetSegment =
intersectionPoint.GetNonIntersectingTargetSegmentIndex(target, false);
int?nextTargetSegment =
intersectionPoint.GetNonIntersectingTargetSegmentIndex(target, true);
Pnt3D previousPntAlongTarget = previousTargetSegment == null
? null
: target[previousTargetSegment.Value].StartPoint;
Pnt3D nextPntAlongTarget = nextTargetSegment == null
? null
: target[nextTargetSegment.Value].EndPoint;
isInbound = nextPntAlongTarget != null &&
intersectionPoint.IsOnTheRightSide(source, nextPntAlongTarget, true);
isOutbound = previousPntAlongTarget != null &&
intersectionPoint.IsOnTheRightSide(source, previousPntAlongTarget, true);
}
private void GetAlongTargetDirectionChanges(
int initialSourcePart,
[NotNull] IntersectionPoint3D startingAt,
[NotNull] Line3D entryLine,
out double?targetForwardDirection,
out double?targetBackwardDirection)
{
targetForwardDirection = null;
targetBackwardDirection = null;
if (CanFollowTarget(startingAt, true, initialSourcePart))
{
int?forwardSegmentIdx =
startingAt.GetNonIntersectingTargetSegmentIndex(Target, true);
if (forwardSegmentIdx != null)
{
Line3D targetForward = Target[forwardSegmentIdx.Value];
targetForwardDirection = GetDirectionChange(entryLine, targetForward);
}
}
if (CanFollowTarget(startingAt, false, initialSourcePart))
{
int?backwardSegmentIdx =
startingAt.GetNonIntersectingTargetSegmentIndex(Target, false);
if (backwardSegmentIdx != null)
{
Line3D targetBackward = Target[backwardSegmentIdx.Value].Clone();
targetBackward.ReverseOrientation();
targetBackwardDirection =
GetDirectionChange(entryLine, targetBackward);
}
}
}
