The various Profile.CreateByLayout() overloaded methods create a new profile with no elevation information. The vertical shape of a profile can then be specified using entities. Entities are geometric elements - tangents or symmetric parabolas. The collection of all entities that make up a profile are contained in the Profile.Entities collection. The ProfileEntityCollection class also contains all the methods for creating new entities.
This sample creates a new profile along the alignment “oAlignment” and then adds three entities to define the profile shape. Two straight entities are added at each end and a symmetric parabola is added in the center to join them and represent the sag of a valley.
// Illustrates creating a new profile without elevation data, then adding the elevation
// via the entities collection
[CommandMethod("CreateProfileNoSurface")]
public void CreateProfileNoSurface()
{
doc = CivilApplication.ActiveDocument;
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
using (Transaction ts = Application.DocumentManager.MdiActiveDocument.Database.TransactionManager.StartTransaction())
{
// Ask the user to select an alignment
PromptEntityOptions opt = new PromptEntityOptions("\nSelect an Alignment");
opt.SetRejectMessage("\nObject must be an alignment.\n");
opt.AddAllowedClass(typeof(Alignment), false);
ObjectId alignID = ed.GetEntity(opt).ObjectId;
Alignment oAlignment = ts.GetObject(alignID, OpenMode.ForRead) as Alignment;
// use the same layer as the alignment
ObjectId layerId = oAlignment.LayerId;
// get the standard style and label set
// these calls will fail on templates without a style named "Standard"
ObjectId styleId = doc.Styles.ProfileStyles["Standard"];
ObjectId labelSetId = doc.Styles.LabelSetStyles.ProfileLabelSetStyles["Standard"];
ObjectId oProfileId = Profile.CreateByLayout("My Profile", alignID, layerId, styleId, labelSetId);
// Now add the entities that define the profile.
Profile oProfile = ts.GetObject(oProfileId, OpenMode.ForRead) as Profile;
Point3d startPoint = new Point3d(oAlignment.StartingStation, -40, 0);
Point3d endPoint = new Point3d(758.2, -70, 0);
ProfileTangent oTangent1 = oProfile.Entities.AddFixedTangent(startPoint, endPoint);
startPoint = new Point3d(1508.2, -60.0, 0);
endPoint = new Point3d(oAlignment.EndingStation, -4.0, 0);
ProfileTangent oTangent2 =oProfile.Entities.AddFixedTangent(startPoint, endPoint);
oProfile.Entities.AddFreeSymmetricParabolaByLength(oTangent1.EntityId, oTangent2.EntityId, VerticalCurveType.Sag, 900.1, true);
ts.Commit();
}
}