// Add a new gap an an array of gaps. The resulting array is simplified. The original array may be null.
public static LegGap[] AddGap(SymPath path, LegGap[] original, PointF pt1, PointF pt2)
{
float dist1, dist2;
LegGap newGap;
LegGap[] newGaps;
// map points to closes points on the line.
path.DistanceFromPoint(pt1, out pt1);
path.DistanceFromPoint(pt2, out pt2);
// Map to distances along the line.
dist1 = path.LengthToPoint(pt1);
dist2 = path.LengthToPoint(pt2);
// Create the new gap.
if (dist1 < dist2)
newGap = new LegGap(dist1, dist2 - dist1);
else
newGap = new LegGap(dist2, dist1 - dist2);
// Add to the old gaps.
if (original == null)
newGaps = new LegGap[1] { newGap };
else {
newGaps = new LegGap[original.Length + 1];
Array.Copy(original, newGaps, original.Length);
newGaps[original.Length] = newGap;
}
// Simplify
return SimplifyGaps(newGaps, path.Length);
}
public override void LeftButtonDrag(Pane pane, PointF location, PointF locationStart, float pixelSize, ref bool displayUpdateNeeded)
{
Debug.Assert(pane == Pane.Map);
// Get the new set of gaps.
LegGap[] newGaps = LegGap.AddGap(courseObjStart.path, courseObjStart.gaps, startDrag, location);
// Put the new gaps into the highlight.
courseObjDrag = new LegCourseObj(courseObjStart.controlId, courseObjStart.courseControlId, courseObjStart.courseControlId2,
courseObjStart.courseObjRatio, courseObjStart.appearance, courseObjStart.path, newGaps);
displayUpdateNeeded = true;
}
// Add a new gap an an array of gaps. The resulting array is simplified. The original array may be null.
public static LegGap[] AddGap(SymPath path, LegGap[] original, PointF pt1, PointF pt2)
{
float dist1, dist2;
LegGap newGap;
LegGap[] newGaps;
// map points to closes points on the line.
path.DistanceFromPoint(pt1, out pt1);
path.DistanceFromPoint(pt2, out pt2);
// Map to distances along the line.
dist1 = path.LengthToPoint(pt1);
dist2 = path.LengthToPoint(pt2);
// Create the new gap.
if (dist1 < dist2)
{
newGap = new LegGap(dist1, dist2 - dist1);
}
else
{
newGap = new LegGap(dist2, dist1 - dist2);
}
// Add to the old gaps.
if (original == null)
{
newGaps = new LegGap[1] {
newGap
}
}
;
else
{
newGaps = new LegGap[original.Length + 1];
Array.Copy(original, newGaps, original.Length);
newGaps[original.Length] = newGap;
}
// Simplify
return(SimplifyGaps(newGaps, path.Length));
}
// Split a path into multiple paths based on an array of LegGaps. The gaps might extend beyond the end of the
// or the beginning of the path. The gaps array need not be in simplified form.
public static SymPath[] SplitPathWithGaps(SymPath pathInitial, LegGap[] gaps)
{
// Get the length of the path.
float pathLength = pathInitial.Length;
// Simply and sort the gaps.
gaps = SimplifyGaps(gaps, pathLength);
// If no gaps length, the entire path is correct.
if (gaps == null)
return new SymPath[1] { pathInitial };
// Transform into start/stop distances from beginning of path.
float[] starts = new float[gaps.Length + 1];
float[] ends = new float[gaps.Length + 1];
starts[0] = 0;
ends[gaps.Length] = pathLength;
for (int i = 0; i < gaps.Length; ++i) {
ends[i] = gaps[i].distanceFromStart;
starts[i + 1] = gaps[i].distanceFromStart + gaps[i].length;
}
// Each 2 points is a new path.
List<SymPath> list = new List<SymPath>(starts.Length);
for (int i = 0; i < starts.Length; ++i) {
SymPath p = pathInitial.Segment(pathInitial.PointAtLength(starts[i]), pathInitial.PointAtLength(ends[i]));
if (p != null)
list.Add(p);
}
return list.ToArray();
}
// Simplify a gap array. Sorts in order, combines overlapping gaps, and removes gaps before and beyond end of length.
public static LegGap[] SimplifyGaps(LegGap[] gaps, float pathLength)
{
if (gaps == null || gaps.Length == 0)
return null;
List<LegGap> newGaps = new List<LegGap>(gaps);
// Truncating to the length of the path. Doesn't remove gaps, but may set their length to negative, which
// will cause them to be removed later.
int i;
for (i = 0; i < newGaps.Count; ++i) {
if (newGaps[i].distanceFromStart + newGaps[i].length > pathLength) {
newGaps[i] = new LegGap(newGaps[i].distanceFromStart, pathLength - newGaps[i].distanceFromStart);
}
if (newGaps[i].distanceFromStart < 0) {
newGaps[i] = new LegGap(0, newGaps[i].length + newGaps[i].distanceFromStart);
}
}
// Remove any gaps with 0 or negative length.
i = 0;
while (i < newGaps.Count) {
if (newGaps[i].length <= 0)
newGaps.RemoveAt(i);
else
++i;
}
// Sort gaps by their start point.
newGaps.Sort(delegate(LegGap gap1, LegGap gap2) {
if (gap1.distanceFromStart < gap2.distanceFromStart)
return -1;
else if (gap1.distanceFromStart > gap2.distanceFromStart)
return 1;
else
return 0;
});
// Combine gaps that overlap.
i = 0;
while (i < newGaps.Count - 1) {
if (newGaps[i].distanceFromStart + newGaps[i].length >= newGaps[i + 1].distanceFromStart) {
if (newGaps[i].distanceFromStart + newGaps[i].length < newGaps[i + 1].distanceFromStart + newGaps[i + 1].length)
newGaps[i] = new LegGap(newGaps[i].distanceFromStart, newGaps[i + 1].length + (newGaps[i + 1].distanceFromStart - newGaps[i].distanceFromStart));
newGaps.RemoveAt(i + 1);
}
else
++i;
}
// And we're done.
return (newGaps.Count > 0) ? newGaps.ToArray() : null;
}
// 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;
}
// Transform a gap array to a new path, keeping close gaps in the closest position on the new path. Remove far away gaps.
public static LegGap[] MoveGapsToNewPath(LegGap[] oldGaps, SymPath oldPath, SymPath newPath)
{
oldGaps = SimplifyGaps(oldGaps, oldPath.Length);
if (oldGaps == null)
return null;
PointF oldStart, oldEnd, newStart, newEnd; // ends points of the gaps
float distanceStart, distanceEnd; // distance between oldStart and newStart, distance between oldEnd and newEnd.
List<LegGap> newGaps = new List<LegGap>();
// Move gap to a new gap by converting start and end to point, finding closest points on new path.
// If the gap has moved too far, just remove it, else transformit.
for (int i = 0; i < oldGaps.Length; ++i) {
oldStart = oldPath.PointAtLength(oldGaps[i].distanceFromStart);
oldEnd = oldPath.PointAtLength(oldGaps[i].distanceFromStart + oldGaps[i].length);
distanceStart = newPath.DistanceFromPoint(oldStart, out newStart);
distanceEnd = newPath.DistanceFromPoint(oldEnd, out newEnd);
// If the new gap is close enough to the old gap, then add the new gap.
if (distanceStart + distanceEnd <= 2 * oldGaps[i].length) {
float newDistanceToStart = newPath.LengthToPoint(newStart);
float newDistanceToEnd = newPath.LengthToPoint(newEnd);
if (newDistanceToStart < newDistanceToEnd)
newGaps.Add(new LegGap(newDistanceToStart, newDistanceToEnd - newDistanceToStart));
else
newGaps.Add(new LegGap(newDistanceToEnd, newDistanceToStart - newDistanceToEnd));
}
}
// Simply the new gap array.
return SimplifyGaps(newGaps.ToArray(), newPath.Length);
}
/*
* Static functions that work on arrays of leg gaps.
*/
// Get the start/stop points of the gaps. Primarily useful for finding where the handles should be.
public static PointF[] GapStartStopPoints(SymPath path, LegGap[] gaps)
{
if (gaps == null || gaps.Length == 0)
return null;
PointF[] pts = new PointF[gaps.Length * 2];
for (int i = 0; i < gaps.Length; ++i) {
pts[i * 2] = path.PointAtLength(gaps[i].distanceFromStart);
pts[i * 2 + 1] = path.PointAtLength(gaps[i].distanceFromStart + gaps[i].length);
}
return pts;
}
// Simplify a gap array. Sorts in order, combines overlapping gaps, and removes gaps before and beyond end of length.
public static LegGap[] SimplifyGaps(LegGap[] gaps, float pathLength)
{
if (gaps == null || gaps.Length == 0)
{
return(null);
}
List <LegGap> newGaps = new List <LegGap>(gaps);
// Truncating to the length of the path. Doesn't remove gaps, but may set their length to negative, which
// will cause them to be removed later.
int i;
for (i = 0; i < newGaps.Count; ++i)
{
if (newGaps[i].distanceFromStart + newGaps[i].length > pathLength)
{
newGaps[i] = new LegGap(newGaps[i].distanceFromStart, pathLength - newGaps[i].distanceFromStart);
}
if (newGaps[i].distanceFromStart < 0)
{
newGaps[i] = new LegGap(0, newGaps[i].length + newGaps[i].distanceFromStart);
}
}
// Remove any gaps with 0 or negative length.
i = 0;
while (i < newGaps.Count)
{
if (newGaps[i].length <= 0)
{
newGaps.RemoveAt(i);
}
else
{
++i;
}
}
// Sort gaps by their start point.
newGaps.Sort(delegate(LegGap gap1, LegGap gap2) {
if (gap1.distanceFromStart < gap2.distanceFromStart)
{
return(-1);
}
else if (gap1.distanceFromStart > gap2.distanceFromStart)
{
return(1);
}
else
{
return(0);
}
});
// Combine gaps that overlap.
i = 0;
while (i < newGaps.Count - 1)
{
if (newGaps[i].distanceFromStart + newGaps[i].length >= newGaps[i + 1].distanceFromStart)
{
if (newGaps[i].distanceFromStart + newGaps[i].length < newGaps[i + 1].distanceFromStart + newGaps[i + 1].length)
{
newGaps[i] = new LegGap(newGaps[i].distanceFromStart, newGaps[i + 1].length + (newGaps[i + 1].distanceFromStart - newGaps[i].distanceFromStart));
}
newGaps.RemoveAt(i + 1);
}
else
{
++i;
}
}
// And we're done.
return((newGaps.Count > 0) ? newGaps.ToArray() : null);
}
// Create a path from pt1 to pt2, with the given radius around the legs. If the leg would
// be of zero length, return null. If bends is non-null, then the path should include those bends.
// If gaps is non-null, updates the gaps by subtracting the radius from them.
private static SymPath GetLegPath(PointF pt1, double radius1, PointF pt2, double radius2, PointF[] bends, LegGap[] gaps)
{
double legLength = Geometry.Distance(pt1, pt2);
// Check for no leg.
if (legLength <= radius1 + radius2)
return null;
int bendCount = (bends == null) ? 0 : bends.Length;
PointF[] coords = new PointF[2 + bendCount];
PointKind[] kinds = new PointKind[2 + bendCount];
// Set the end points.
coords[0] = Geometry.DistanceAlongLine(pt1, (bendCount > 0) ? bends[0] : pt2, radius1);
coords[coords.Length - 1] = Geometry.DistanceAlongLine(pt2, (bendCount > 0) ? bends[bends.Length - 1] : pt1, radius2);
// Set the bends.
if (bendCount > 0)
Array.Copy(bends, 0, coords, 1, bendCount);
// Create the path.
for (int i = 0; i < kinds.Length; ++i)
kinds[i] = PointKind.Normal;
// Update the gaps (if any).
if (gaps != null) {
for (int i = 0; i < gaps.Length; ++i)
gaps[i].distanceFromStart -= (float) radius1;
}
return new SymPath(coords, kinds);
}
// Create a path from pt1 to pt2, with a radius aroudn the points correct for the given control kind. If the leg would
// be of zero length, return null. The controlIds for the start and end points are optional -- if supplied, they are used
// to deal with bends and gaps. If either is None, then the legs don't use bends or gaps. Returns the gaps to used
// with the radius subtracted from them.
public static SymPath GetLegPath(EventDB eventDB, PointF pt1, ControlPointKind kind1, Id<ControlPoint> controlId1, PointF pt2, ControlPointKind kind2, Id<ControlPoint> controlId2, float scaleRatio, CourseAppearance appearance, out LegGap[] gaps)
{
PointF[] bends = null;
gaps = null;
// Get bends and gaps if controls were supplied.
if (controlId1.IsNotNone && controlId2.IsNotNone) {
Id<Leg> legId = QueryEvent.FindLeg(eventDB, controlId1, controlId2);
Leg leg = (legId.IsNotNone) ? eventDB.GetLeg(legId) : null;
// Get the path of the line.
if (leg != null) {
bends = leg.bends;
gaps = QueryEvent.GetLegGaps(eventDB, controlId1, controlId2);
}
}
return GetLegPath(pt1, GetLegRadius(kind1, scaleRatio, appearance), pt2, GetLegRadius(kind2, scaleRatio, appearance), bends, gaps);
}
float thickness; // thickness of the line (unscaled)
#endregion Fields
#region Constructors
protected LineCourseObj(Id<ControlPoint> controlId, Id<CourseControl> courseControlId, Id<CourseControl> courseControlId2, Id<Special> specialId, float scaleRatio, CourseAppearance appearance, float thickness, SymPath path, LegGap[] gaps)
: base(controlId, courseControlId, specialId, scaleRatio, appearance)
{
this.courseControlId2 = courseControlId2;
this.thickness = thickness;
this.path = path;
this.gaps = this.movableGaps = gaps;
}
public LegCourseObj(Id<ControlPoint> controlId, Id<CourseControl> courseControlId, Id<CourseControl> courseControlId2, float scaleRatio, CourseAppearance appearance, SymPath path, LegGap[] gaps)
: base(controlId, courseControlId, courseControlId2, Id<Special>.None, scaleRatio, appearance, NormalCourseAppearance.lineThickness * appearance.lineWidth, path, gaps)
{
}
// 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);
}
}