/// <summary>
/// Normalizes all points in the selected subregion to the average elevation of the host surface.
/// </summary>
/// <param name="uiDoc">The document.</param>
private void NormalizeSubregionAndPoints(UIDocument uiDoc)
{
Document doc = uiDoc.Document;
// Pick subregion
TopographySurface subregion = SiteUIUtils.PickSubregion(uiDoc);
TopographySurface toposurface = SiteEditingUtils.GetTopographySurfaceHost(subregion);
IList <XYZ> points = SiteEditingUtils.GetPointsFromSubregionExact(subregion);
// Get elevation of all points on the toposurface
IList <XYZ> allPoints = toposurface.GetPoints();
double elevation = SiteEditingUtils.GetAverageElevation(allPoints);
// Edit scope for all changes
using (TopographyEditScope editScope = new TopographyEditScope(doc, "Edit TS"))
{
editScope.Start(toposurface.Id);
using (Transaction t = new Transaction(doc, "Normalize terrain"))
{
t.Start();
// Change all points to same elevation
toposurface.ChangePointsElevation(points, elevation);
t.Commit();
}
editScope.Commit(new TopographyEditFailuresPreprocessor());
}
}
