/// <summary>
/// Assumes input is valid
/// (e.g. <paramref name="start" /> minor or equals to <paramref name="end" />).
/// </summary>
/// <param name="start"></param>
/// <param name="end"></param>
/// <returns></returns>
private IGeometry ComputeLinear(LinearLocation start, LinearLocation end)
{
LinearGeometryBuilder builder = new LinearGeometryBuilder(line.Factory);
builder.FixInvalidLines = true;
if (!start.IsVertex)
{
builder.Add(start.GetCoordinate(line));
}
LinearIterator it = new LinearIterator(line, start);
foreach (LinearIterator.LinearElement element in it)
{
int compare = end.CompareLocationValues(element.ComponentIndex, element.VertexIndex, 0.0);
if (compare < 0)
{
break;
}
ICoordinate pt = element.SegmentStart;
builder.Add(pt);
if (element.IsEndOfLine)
{
builder.EndLine();
}
}
if (!end.IsVertex)
{
builder.Add(end.GetCoordinate(line));
}
return(builder.GetGeometry());
}
/// <summary>
/// Assumes input is valid
/// (e.g. <paramref name="start" /> minor or equals to <paramref name="end" />).
/// </summary>
/// <param name="start"></param>
/// <param name="end"></param>
/// <returns></returns>
private IGeometry ComputeLinear(LinearLocation start, LinearLocation end)
{
LinearGeometryBuilder builder = new LinearGeometryBuilder(line.Factory);
builder.FixInvalidLines = true;
if (!start.IsVertex)
builder.Add(start.GetCoordinate(line));
LinearIterator it = new LinearIterator(line, start);
foreach (LinearIterator.LinearElement element in it)
{
int compare = end.CompareLocationValues(element.ComponentIndex, element.VertexIndex, 0.0);
if (compare < 0)
break;
ICoordinate pt = element.SegmentStart;
builder.Add(pt);
if (element.IsEndOfLine)
builder.EndLine();
}
if (!end.IsVertex)
builder.Add(end.GetCoordinate(line));
return builder.GetGeometry();
}
