/// <summary>
/// Changes the elevation of all points in the subregion by a designated delta.
/// </summary>
/// <param name="uiDoc">The document.</param>
/// <param name="elevationDelta">The change in elevation.</param>
public static void ChangeSubregionAndPointsElevation(UIDocument uiDoc, double elevationDelta)
{
Document doc = uiDoc.Document;
// Pick subregion
TopographySurface subregion = PickSubregion(uiDoc);
TopographySurface toposurface = SiteEditingUtils.GetTopographySurfaceHost(subregion);
// Get points
IList <XYZ> points = SiteEditingUtils.GetNonBoundaryPoints(subregion);
if (points.Count == 0)
{
return;
}
// Change in elevation
XYZ delta = elevationDelta * XYZ.BasisZ;
// Edit scope for all changes
using (TopographyEditScope editScope = new TopographyEditScope(doc, "Raise/lower terrain"))
{
editScope.Start(toposurface.Id);
using (Transaction t = new Transaction(doc, "Raise/lower terrain"))
{
t.Start();
// Use MovePoints to change all points relative to their current position
toposurface.MovePoints(points, delta);
t.Commit();
}
editScope.Commit(new TopographyEditFailuresPreprocessor());
}
}
/// <summary>
/// Moves a subregion and the associated topography to a new user-selected location.
/// </summary>
/// <param name="uiDoc">The document.</param>
private void MoveSubregionAndPoints(UIDocument uiDoc)
{
Document doc = uiDoc.Document;
// Pick subregion
TopographySurface subregion = SiteUIUtils.PickSubregion(uiDoc);
TopographySurface toposurface = SiteEditingUtils.GetTopographySurfaceHost(subregion);
IList <XYZ> points = SiteEditingUtils.GetPointsFromSubregionExact(subregion);
XYZ sourceLocation = SiteEditingUtils.GetCenterOf(subregion);
// Pick target location
XYZ targetPoint = SiteUIUtils.PickPointNearToposurface(uiDoc, toposurface, "Pick point to move to");
// Delta for the move
XYZ delta = targetPoint - sourceLocation;
// All changes are added to one transaction group - will create one undo item
using (TransactionGroup moveGroup = new TransactionGroup(doc, "Move subregion and points"))
{
moveGroup.Start();
// Get elevation of region in current location
IList <XYZ> existingPointsInCurrentLocation = subregion.GetPoints();
double existingElevation = SiteEditingUtils.GetAverageElevation(existingPointsInCurrentLocation);
// Move subregion first - allows the command delete existing points and adjust elevation to surroundings
using (Transaction t2 = new Transaction(doc, "Move subregion"))
{
t2.Start();
ElementTransformUtils.MoveElement(doc, subregion.Id, delta);
t2.Commit();
}
// The boundary points for the subregion cannot be deleted, since they are generated
// to represent the subregion boundary rather than representing real points in the host.
// Get non-boundary points only to be deleted.
IList <XYZ> existingPointsInNewLocation = SiteEditingUtils.GetNonBoundaryPoints(subregion);
// Average elevation of all points in the subregion.
double newElevation = SiteEditingUtils.GetAverageElevation(subregion.GetPoints());
// Adjust delta for elevation based on calculated values
delta = SiteEditingUtils.MoveXYZToElevation(delta, newElevation - existingElevation);
// Edit scope for points changes
using (TopographyEditScope editScope = new TopographyEditScope(doc, "Edit TS"))
{
editScope.Start(toposurface.Id);
using (Transaction t = new Transaction(doc, "Move points"))
{
t.Start();
// Delete existing points from target region
if (existingPointsInNewLocation.Count > 0)
{
toposurface.DeletePoints(existingPointsInNewLocation);
}
// Move points from source region
toposurface.MovePoints(points, delta);
t.Commit();
}
editScope.Commit(new TopographyEditFailuresPreprocessor());
}
moveGroup.Assimilate();
}
}
