private Feature ImportName(Ntx.Name name, Operation creator)
{
/*
// Get pointer to the applicable map theme
CeTheme theme(Name.GetTheme());
CeTheme* pTheme = theme.AddTheme();
// Get pointer to the entity type.
GRAPHICSTYPE geom = ANNOTATION;
if ( Name.IsLabel() ) geom = POLYGON;
CeEntity* pEntity = AddEntity(Name.GetpFeatureCode(),pTheme,geom);
*/
IEntity entity = GetEntityType(name, SpatialType.Text);
// Get the text string
string text = name.Text;
// Get the position of the centre of the 1st character
Ntx.Position pos = name.Position(0);
IPosition vcentre = new Position(pos.Easting, pos.Northing);
// Get text metrics
float height = name.Height;
float spacing = name.Spacing;
float rotation = name.Rotation;
// Calculate the top left corner of the first character using
// the text metrics we just got ...
// Get the width of the first character. For names that contain
// only one character, the spacing we have will be zero, so in
// that case, deduce the width of the character via the covering
// rectangle.
float charwidth = spacing;
if (charwidth < Constants.TINY)
{
// Get the covering rectangle.
Ntx.Position nw = name.NorthWest;
Ntx.Position se = name.SouthEast;
// And get the dimensions.
double dx = se.Easting - nw.Easting;
double dy = nw.Northing - se.Northing;
// If the cover is screwed up, assume the width is 80% of the text height.
if (dy < Constants.TINY)
charwidth = (float)(height * 0.8);
else
charwidth = (float)(height * (dx/dy));
}
// Define the bearing from bottom to top of the text.
double vbear = (double)rotation;
// Get position directly above the centre of the 1st char.
IPosition above = Geom.Polar(vcentre, vbear, 0.5 * (double)height);
// Define the bearing from the point we just got to the
// start of the text string.
double hbear = vbear - Constants.PIDIV2;
// Back up half a character to get the initial corner.
PointGeometry topleft = new PointGeometry(Geom.Polar(above, hbear, 0.5 * (double)charwidth));
IFont font = null;
double width = (double)text.Length * charwidth;
TextFeature result = null;
if (name.IsLabel)
{
// Create key text
string keystr = name.Text;
KeyTextGeometry kt = new KeyTextGeometry(topleft, font, height, width, rotation);
InternalIdValue id = CadastralMapModel.Current.WorkingSession.AllocateNextId();
result = new TextFeature(creator, id, entity, kt);
kt.Label = result;
result.SetTopology(true);
// Define the label's foreign ID and form a two-way association
ForeignId fid = GetFeatureId(keystr);
Debug.Assert(fid != null);
fid.Add(result);
// Remember the reference position of the label.
Ntx.Position xp = name.RefPosition;
IPointGeometry pp = new PointGeometry(xp.Easting, xp.Northing);
result.SetPolPosition(pp);
}
else
{
// Create a miscellaneous text label.
MiscTextGeometry mt = new MiscTextGeometry(text, topleft, font, height, width, rotation);
InternalIdValue id = CadastralMapModel.Current.WorkingSession.AllocateNextId();
result = new TextFeature(creator, id, entity, mt);
result.SetTopology(false);
}
return result;
}
private Feature ImportSymbol(Ntx.Symbol symbol, Operation creator)
{
IEntity what = GetEntityType(symbol, SpatialType.Point);
// Get the position
Ntx.Position pos = symbol.Position;
PointGeometry g = new PointGeometry(pos.Easting, pos.Northing);
// Ignore positions at 0,0!
if (g.Easting.Microns==0 && g.Northing.Microns==0)
return null;
InternalIdValue id = CadastralMapModel.Current.WorkingSession.AllocateNextId();
PointFeature p = new PointFeature(creator, id, what, g);
/*
static LOGICAL warned=FALSE; // debug
// Get pointer to the map theme
CeTheme theme(Symbol.GetTheme());
const CeTheme* const pTheme = theme.AddTheme();
// Get pointer to the entity
CeEntity* pEntity = AddEntity(Symbol.GetpFeatureCode(),pTheme,VERTEX);
// Get the position
const CxPosition& pos = Symbol.GetPosition();
// For the time being ...
if ( !warned && pos.Is3D() ) {
AfxMessageBox("Elevation data is being stripped.");
warned = TRUE;
}
// Add the position of the symbol.
CeVertex vtx(pos.GetEasting(),pos.GetNorthing()) ;
const CeLocation* pLoc = pMap->AddLocation(vtx);
// If the location does not already have an associated point
// feature, add one now (the location may have been previously
// added via the import of a line).
// Note that this version of AddPoint will always add a duplicate
// point at the specified location.
CePoint* pPoint = pMap->AddPoint((CeLocation* const)pLoc,pEntity);
*/
// Define foreign ID (if any) ...
string keystr = symbol.Key;
ForeignId fid = GetFeatureId(keystr);
if (fid != null)
fid.Add(p);
return p;
}
private Feature ImportLine(ILength tol, Ntx.Line line, Operation creator)
{
// Circular arcs are handled elsewhere
if (line.IsCurve)
return null;
IEntity what = GetEntityType(line, SpatialType.Line);
PointGeometry[] pts = GetPositions(line);
// Ignore zero-length lines
if (HasZeroLength(pts))
return null;
// Ensure point features exist at both ends of the line.
PointFeature ps = EnsurePointExists(pts[0], tol, creator);
PointFeature pe = EnsurePointExists(pts[pts.Length-1], tol, creator);
// Force end positions to match
pts[0] = ps.PointGeometry;
pts[pts.Length-1] = pe.PointGeometry;
// It's possible we've now produced a zero-length line
if (Object.ReferenceEquals(ps, pe) && HasZeroLength(pts))
return null;
// If we're dealing with a multi-segment, I have occasionally seen tiny glitches
// at the end of the incoming lines (whether this is a real data problem, or an
// imperfection in the import software is unknown). So double check now.
// In the longer term, the import software should also check for more complex
// issues, like missing intersections. In the meantime, I assume that incoming
// topological data is generally clean.
if (pts.Length > 2 && line.IsTopologicalArc)
pts = CheckMultiSegmentEnds(pts);
LineFeature result;
InternalIdValue id = CadastralMapModel.Current.WorkingSession.AllocateNextId();
if (pts.Length==2)
result = new LineFeature(creator, id, what, ps, pe);
else
result = new LineFeature(creator, id, what, ps, pe, pts);
// The toological status of the incoming arc may override the status that the
// constructor derived from the entity type
result.SetTopology(line.IsTopologicalArc);
return result;
}
private ArcFeature ImportArc(Ntx.Line line, Operation creator, ILength tol)
{
Debug.Assert(line.IsCurve);
IEntity what = GetEntityType(line, SpatialType.Line);
// Get positions defining the arc
PointGeometry[] pts = GetPositions(line);
// Ignore zero-length lines
if (HasZeroLength(pts))
return null;
// Add a point at the center of the circle
Ntx.Position pos = line.Center;
PointGeometry pc = new PointGeometry(pos.Easting, pos.Northing);
PointFeature center = EnsurePointExists(pc, tol, creator);
// Calculate exact positions for the arc endpoints
double radius = line.Radius;
ICircleGeometry cg = new CircleGeometry(pc, radius);
IPosition bc = CircleGeometry.GetClosestPosition(cg, pts[0]);
IPosition ec = CircleGeometry.GetClosestPosition(cg, pts[pts.Length-1]);
// Round off to nearest micron
PointGeometry bcg = PointGeometry.Create(bc);
PointGeometry ecg = PointGeometry.Create(ec);
// Ensure point features exist at both ends of the line.
PointFeature ps = GetArcEndPoint(bcg, tol, creator);
PointFeature pe = GetArcEndPoint(ecg, tol, creator);
// Try to find a circle that's already been added by this import.
Circle c = EnsureCircleExists(center, radius, tol, creator);
// Determine which way the arc is directed
bool iscw = LineStringGeometry.IsClockwise(pts, center);
InternalIdValue id = CadastralMapModel.Current.WorkingSession.AllocateNextId();
ArcFeature arc = new ArcFeature(creator, id, what, c, ps, pe, iscw);
// The toological status of the incoming arc may override the status that the
// constructor derived from the entity type
arc.SetTopology(line.IsTopologicalArc);
#if DEBUG
// Confirm the NTX data was valid (ensure it's consistent with what we've imported)...
double readRad = c.Radius;
double calcRad = BasicGeom.Distance(c.Center, ps);
Debug.Assert(Math.Abs(readRad-calcRad) < tol.Meters);
foreach (IPointGeometry pg in pts)
{
ILength check = arc.Geometry.Distance(pg);
Debug.Assert(check.Meters < tol.Meters);
}
#endif
return arc;
}
private PointGeometry[] GetPositions(Ntx.Line line)
{
PointGeometry[] pts = new PointGeometry[line.NumPosition];
for (int i=0; i<line.NumPosition; i++)
{
Ntx.Position xp = line.Position(i);
pts[i] = new PointGeometry(xp.Easting, xp.Northing);
}
return pts;
}
ILength GetPointMatchTolerance(Ntx.File file)
{
// Define line end point tolerance that matches the resolution of the input NTX file.
// ...in the sample NTX file I've got, the resolution is supposedly 0.0001m, but
// things like circle center points are frequently different by 0.0002 or so.
// So be a bit more permissive as far as search tolerance is concerned.
double res = file.Header.XYResolution;
//ILength tol = new MicronValue(res);
ILength tol = new MicronValue(res*10);
return tol;
}
private IEntity GetEntityType(Ntx.Feature f, SpatialType type)
{
if (m_Translator==null)
return null;
string fc = f.FeatureCode;
return m_Translator.FindEntityTypeByExternalName(fc, type);
}
