/// <summary>
/// Tests if MultiPoint is simple.
/// </summary>
/// <param name="mp">Geometry to test. Must be of type MultiPoint.</param>
/// <returns>Returns True if geometry is simple.</returns>
/// <remarks>A MultiPoint is simple if and only if it has no repeated points.</remarks>
public bool IsSimple( MultiPoint mp )
{
if ( mp.IsEmpty() )
{
return true;
}
SortedList points = new SortedList();
for ( int i = 0; i < mp.GetNumGeometries(); i++ )
{
Point pt = (Point) mp.GetGeometryN( i );
Coordinate p = pt.GetCoordinate();
if ( points.Contains( p ) )
{
return false;
}
points.Add( p, p );
} //for ( int i = 0; i < mp.NumGeometries; i++ )
return true;
} // public bool IsSimple( MultiPoint mp )
/// <summary>
/// Converts a MultiPoint to <MultiPoint Text> format, then
/// Appends it to the writer.
/// </summary>
/// <param name="multiPoint">The MultiPoint to process.</param>
/// <param name="writer">The output stream writer to Append to.</param>
protected void AppendMultiPointText(MultiPoint multiPoint, TextWriter writer)
{
if (multiPoint.IsEmpty())
{
//writer.Write("EMPTY");
}
else
{
for (int i = 0; i < multiPoint.GetNumGeometries(); i++)
{
AppendPointTaggedText( multiPoint.GetCoordinate(i), writer, _precisionModel);
}
}
}
/// <summary>
/// Converts a MultiPoint to <MultiPoint Tagged Text>
/// format, then Appends it to the writer.
/// </summary>
/// <param name="multipoint">The MultiPoint to process.</param>
/// <param name="writer">The output writer to Append to.</param>
protected void AppendMultiPointTaggedText(MultiPoint multipoint, TextWriter writer)
{
//writer.Write("<g>");
AppendMultiPointText(multipoint, writer);
//writer.Write("</g>");
}
/// <summary>
/// Converts a MultiPoint to <MultiPoint Text> format, then
/// Appends it to the writer.
/// </summary>
/// <param name="multiPoint">The MultiPoint to process.</param>
/// <param name="level"></param>
/// <param name="writer">The output stream writer to Append to.</param>
protected void AppendMultiPointText(MultiPoint multiPoint, int level, StringWriter writer)
{
if ( multiPoint.IsEmpty() )
{
writer.Write("EMPTY");
}
else
{
writer.Write("(");
for (int i = 0; i < multiPoint.GetNumGeometries(); i++)
{
if (i > 0)
{
writer.Write(", ");
}
AppendCoordinate( multiPoint.GetCoordinates()[i], writer,
multiPoint.PrecisionModel );
}
writer.Write(")");
}
}
/// <summary>
/// Converts a MultiPoint to <MultiPoint Tagged Text>
/// format, then Appends it to the writer.
/// </summary>
/// <param name="multipoint">The MultiPoint to process.</param>
/// <param name="level"></param>
/// <param name="writer">The output writer to Append to.</param>
protected void AppendMultiPointTaggedText(MultiPoint multipoint, int level, StringWriter writer)
{
writer.Write("MULTIPOINT ");
AppendMultiPointText(multipoint, level, writer);
}
/// <summary>
/// Writes a multipoint.
/// </summary>
/// <param name="mp">The multipoint to be written.</param>
private void WriteMultiPoint(MultiPoint mp, byte format)
{
//Get the number of points in this multipoint.
int numPoints = mp.GetNumPoints();
//Write the number of points.
_bWriter.Write(numPoints);
//Loop on the number of points.
for(int i = 0; i < numPoints; i++)
{
//write the multipoint header
_bWriter.Write(format);
_bWriter.Write(4);
_bWriter.Write(numPoints);
//Write each point.
WritePoint((Point)mp[i]);
}
}