/*
* /// <summary>
* /// Updates the definition of this circle.
* /// </summary>
* /// <param name="center">The point at the center of the circle.</param>
* /// <param name="radius">The radius of the circle, on the ground, in meters</param>
* internal void MoveCircle(PointFeature center, double radius)
* {
* // Remove this circle (and attached arcs) from the spatial index
* foreach (ArcFeature a in m_Arcs)
* a.PreMove();
*
* m_Center.MapModel.EditingIndex.RemoveCircle(this);
*
* // If the center location is changing then ensure that
* // the old location no longer refers to this circle,
* // and ensure the new one does.
*
* // 08-DEC-99: Note that there appears to be inconsistency
* // in the cross-referencing of the center location to the
* // circle. Some places seem to do it, while other don't.
* // The extra reference shouldn't hurt, and at some stage
* // in the future, it would be good to enforce this.
*
* if (!Object.ReferenceEquals(m_Center, center))
* {
* m_Center.CutReference(this);
* m_Center = center;
* m_Center.AddReference(this);
* }
*
* // Change the radius
* m_Radius = radius;
*
* // Re-index this circle and any attached arcs (this should also
* // mark the operations that created the arcs for rollforward).
* m_Center.MapModel.EditingIndex.AddCircle(this);
* foreach (ArcFeature a in m_Arcs)
* a.PostMove();
* }
*/
/// <summary>
/// Checks whether this circle is referenced to arcs that terminaye at
/// a specific point. This excludes arcs that correspond to the whole circle.
/// </summary>
/// <param name="p">The point to look for</param>
/// <returns>True if an incident arc was found.</returns>
internal bool HasArcsAt(PointFeature p)
{
// A location to check has to be specified!
if (p == null)
{
return(false);
}
// Loop through each arc (including inactive ones).
foreach (ArcFeature a in m_Arcs)
{
// Skip if the arc represents the whole circle.
if (a.Geometry.IsCircle)
{
continue;
}
// Check whether either end of the arc coincides with
// the check location.
if (p.IsCoincident(a.StartPoint) || p.IsCoincident(a.EndPoint))
{
return(true);
}
}
return(false);
}
PointFeature GetArcEndPoint(PointGeometry g, ILength tol, Operation creator)
{
// Ensure we've got a point at the required position
PointFeature pt = EnsurePointExists(g, tol, creator);
// If it's not exactly coincident, we've picked up a previously loaded point
// that happens to be within tolerance. If it's not already connected to any
// lines, shift it to where we want it.
if (!pt.IsCoincident(g))
{
if (!pt.HasDependents)
{
m_Index.Remove(pt);
PointFeature[] pts = pt.Node.Points;
pt.SetNode(new Node(pts, g));
m_Index.Add(pt);
}
}
return(pt);
}
/// <summary>
/// Defines any extra points that might coincide with this face.
/// <c>m_Polygon</c> and <c>m_Line</c> must both be defined prior to call
/// (via a call to <c>SetLine</c>).
/// </summary>
/// <returns>The number of extra points</returns>
int SetExtraPoints()
{
Debug.Assert(m_Polygon != null);
Debug.Assert(m_Divider != null);
// Determine whether the order needs to be reversed
// (the points should follow a clockwise cycle round
// the polygon)
bool reverse = (m_Divider.Left == m_Polygon);
// Define the initial position
if (reverse)
{
m_Begin = m_Divider.To;
m_End = m_Divider.From;
}
else
{
m_Begin = m_Divider.From;
m_End = m_Divider.To;
}
// Trash any old info kicking around (we shouldn't really have any)
m_ExtraPoints = null;
// Get any points along the divider (excluding end points)
LineGeometry line = m_Divider.LineGeometry;
ISpatialIndex index = CadastralMapModel.Current.Index;
ILength tol = new Length(Constants.XYTOL);
List <PointFeature> xp = new FindPointsOnLineQuery(index, line, false, tol).Result;
if (xp.Count == 0)
{
return(0);
}
// If we've got more than one extra point, ensure they're sorted in
// the same direction as the line.
if (xp.Count == 1)
{
m_ExtraPoints = xp.ToArray();
}
else
{
// Sort the points so they're arranged along the divider
List <TaggedObject <PointFeature, double> > pts =
new List <TaggedObject <PointFeature, double> >(xp.Count);
foreach (PointFeature p in xp)
{
double value = line.GetLength(p).Meters;
if (reverse)
{
value = -value;
}
pts.Add(new TaggedObject <PointFeature, double>(p, value));
}
pts.Sort(delegate(TaggedObject <PointFeature, double> a,
TaggedObject <PointFeature, double> b)
{
return(a.Tag.CompareTo(b.Tag));
});
// Retrieve the points in their sorted order, ignoring any coincident points
// (this assumes that it doesn't matter which PointFeature we actually pick up)
List <PointFeature> extraPoints = new List <PointFeature>(pts.Count);
PointFeature prev = null;
foreach (TaggedObject <PointFeature, double> tp in pts)
{
PointFeature p = tp.Thing;
if (prev == null || !p.IsCoincident(prev))
{
extraPoints.Add(p);
prev = p;
}
}
// Allocate array of distinct extra positions
m_ExtraPoints = extraPoints.ToArray();
}
return(m_ExtraPoints == null ? 0 : m_ExtraPoints.Length);
}