// Move a gap start/stop point to a new location. Return the new gap array. The gap array is NOT simplified.
public static LegGap[] MoveStartStopPoint(SymPath path, LegGap[] gaps, PointF oldPt, PointF newPt)
{
LegGap[] newGaps = (LegGap[]) gaps.Clone();
float newLengthAlongPath = path.LengthToPoint(newPt);
for (int i = 0; i < newGaps.Length; ++i) {
PointF startPt = path.PointAtLength(gaps[i].distanceFromStart);
PointF endPt = path.PointAtLength(gaps[i].distanceFromStart + gaps[i].length);
if (Geometry.Distance(startPt, oldPt) < 0.01) {
// Moving start point of the gap.
newGaps[i].length -= (newLengthAlongPath - newGaps[i].distanceFromStart);
newGaps[i].distanceFromStart = newLengthAlongPath;
}
else if (Geometry.Distance(endPt, oldPt) < 0.01) {
// Moving end point of the gap.
newGaps[i].length = newLengthAlongPath - gaps[i].distanceFromStart;
}
}
return newGaps;
}
// Change the gaps associated with a leg.
public static void ChangeLegGaps(EventDB eventDB, Id<ControlPoint> controlId1, Id<ControlPoint> controlId2, LegGap[] newGaps)
{
// Get the leg object for this leg. Create one if needed.
Id<Leg> legId = QueryEvent.FindLeg(eventDB, controlId1, controlId2);
Leg leg;
if (legId.IsNone)
leg = new Leg(controlId1, controlId2);
else
leg = (Leg) eventDB.GetLeg(legId).Clone();
// Change the gaps.
leg.gaps = (newGaps == null) ? null : (LegGap[]) newGaps.Clone();
// Write the change leg object to the event DB. If the leg is vacuous, could involve removing the leg.
if (leg.IsVacuous()) {
if (legId.IsNotNone)
eventDB.RemoveLeg(legId);
}
else {
if (legId.IsNone)
eventDB.AddLeg(leg);
else
eventDB.ReplaceLeg(legId, leg);
}
}