A feature line is a connected series of points along a corridor created by joining those points from each assembly that share a particular code. Feature lines are used to build the 3D model of a corridor.
Inheritance Hierarchy
SystemObjectSystemMarshalByRefObject
DisposableWrapper
RXObject
Drawable
DBObject
Entity
Curve
Entity
Autodesk.Civil.DatabaseServicesEntity
Autodesk.Civil.DatabaseServicesFeature
Autodesk.Civil.DatabaseServicesFeatureLine
Autodesk.Civil.DatabaseServicesAutoCorridorFeatureLine
Autodesk.Civil.DatabaseServicesAutoFeatureLine
Autodesk.Civil.DatabaseServicesSurveyFigure
Namespace: Autodesk.Civil.DatabaseServices
Assembly: AeccDbMgd (in AeccDbMgd.dll) Version: 13.8.0.1516
Syntax
C#
public class FeatureLine : Feature
VB
Public Class FeatureLine Inherits Feature
C++
public ref class FeatureLine : public Feature
The FeatureLine type exposes the following members.
Properties
| Name | Description | |
|---|---|---|
 | Application |
Gets the Application. Not currently implemented.
(Inherited from Entity) |
| CurvesCount | Gets the FeatureLine's curve count. |
| Description |
Gets or sets the Entity object's description.
(Inherited from Entity) |
| DisplayName |
Gets the Entity object's display name.
(Inherited from Entity) |
| Document |
Gets the Document. Not currently implemented.
(Inherited from Entity) |
| ElevationPointsCount | Gets the FeatureLine's Elevation Points count. |
| FingerPrint |
Gets or sets FingerPrint of the Entity.
(Inherited from Entity) |
| FolderId |
Gets the folder ObjectId of the Entity
Returns ObjectId::Null if the Entity is located in root folder
(Inherited from Entity) |
| IsCWSReferenceObject |
Gets whether the Entity is a Civil Worksharing reference object. A Civil Worksharing reference object is
a Civil object shared to Shared Space. It is not editable. But it can be updated to the new version in the Shared Space.
(Inherited from Entity) |
| IsCWSSourceObject |
Gets whether the Entity is a Civil Worksharing source object. A Civil Worksharing source object is
a Civil object shared to Shared Space. It is editable and can be updated to Shared Space.
(Inherited from Entity) |
| IsEditable |
Gets the value indicates whether the Feature derived entity (Alignment,Profile,etc) is editable.
(Inherited from Feature) |
| IsPartialReferenceObject |
Gets whether the surface is partial reference surface.
(Inherited from Entity) |
| IsReadOnlyReferenceObject |
Gets whether the Entity is a readonly reference object. A readonly reference object is
either a data shortcut referece object or a Civil Worksharing reference object.
(Inherited from Entity) |
 | IsReferencedSourceExisting |
For reference object (IsReferenceObject == true), it will try to get its source entity while opening a drawing.
This indicates whether the reference object has source entity.
(Inherited from Entity) |
| IsReferenceObject |
Gets whether the Entity is a reference object. A reference object is
located in another drawing, and linked using a data shortcut or Vault.
If the entity is native to the current drawing this property returns false;
if it is being referenced via data shortcuts or AutoCAD Vault it returns true.
(Inherited from Entity) |
| IsReferenceStale |
For reference objects (IsReferenceObject == true), gets whether the Entity object's reference is stale.
(Inherited from Entity) |
| IsReferenceSubObject |
For reference objects (IsReferenceObject == true), gets whether the Entity is a reference subobject.
For example, when iterating through the structure of a pipe network referenced from another drawing,
this property is true for each entity.
(Inherited from Entity) |
| IsReferenceValid |
For reference objects (IsReferenceObject == true), gets whether the Entity object's reference is valid.
(Inherited from Entity) |
| IsUsed |
Gets whether the style is used by other objects in the current drawing.
(Inherited from Entity) |
| Length2D | Gets the FeatureLine's 2D length. |
| Length3D | Gets the FeatureLine's 3D length. |
| MaxElevation | Gets the FeatureLine's maximum elevation. |
| MaxGrade | Gets the FeatureLine's maximum grade. |
| MinElevation | Gets the FeatureLine's minimal elevation. |
| MinGrade | Gets the FeatureLine's minimal grade. |
| Name |
Gets or sets the Entity object's name.
(Inherited from Entity) |
| PIPointsCount | Gets the FeatureLine's PI Points count. |
| PointsCount | Gets the FeatureLine's points count, including PI Points and Elevation Points. |
| RelativeSurfaceId | Gets or sets the Featureline's relative surface Id. |
| ShowToolTip |
Gets or sets whether to show tooltips for the Entity.
(Inherited from Entity) |
| SiteId | Gets the ObjectId of the Site which FeatureLine belongs to. |
| StyleId |
sets the FeatureLine's style Id.
(Overrides EntityStyleId) |
| StyleName |
Gets or sets the Featureline's style name.
(Overrides EntityStyleName) |
Methods
| Name | Description | |
|---|---|---|
 | AssignElevationsFromSurface | Assigns elevations from surface. |
| ComputeFingerPrint |
Compute FingerPrint of the Entity.
(Inherited from Entity) |
 | Create(String, ObjectId) | Creates a FeatureLine from the specified Line, Arc, Polyline, Polyline2d or Polyline3d. |
| Create(String, ObjectId, ObjectId) | Creates a FeatureLine from the specified Line, Arc, Polyline, Polyline2d or Polyline3d. |
| DeleteElevationPoint | Deletes an elevation point along the FeatureLine. |
| DeleteElevationPoints | Deletes elevation points along the FeatureLine. |
| DeletePIPoint | Deletes a PI point along the FeatureLine. |
| ExtendWithFixedCurve(Boolean, Point3d) | Extends the feature line with a curved arc segment to the specified target point. This method adds a new fixed arc segment to either the beginning or end of the feature line, creating a smooth curve from the current start/end point to the specified target point. The arc is automatically calculated based on the current tangent direction and target point. The method determines the optimal arc geometry to create a smooth transition. |
| ExtendWithFixedCurve(Boolean, Point3d, Point3d) | Extends the feature line with a curved arc segment defined by three points. This method adds a new fixed arc segment to either the beginning or end of the feature line, creating a smooth curve that passes through the specified second point and ends at the target point. The arc is calculated using the three-point arc definition method, providing precise control over the arc's curvature and direction. This is useful when you need to create arcs with specific geometric constraints. |
| ExtendWithFixedLine(Boolean, Point3d) | Extends the feature line with a straight line segment to the specified target point. This method adds a new fixed linear segment to either the beginning or end of the feature line, connecting the current start/end point to the specified target point. The extension creates a fixed line segment that becomes part of the feature line's geometry. This is useful for extending feature lines to specific coordinates or connecting to other objects. |
| ExtendWithFixedLine(Boolean, Double) | Extends the feature line with a straight line segment of specified length. This method adds a new fixed linear segment to either the beginning or end of the feature line, extending in the current direction by the specified distance. The extension direction is determined by the tangent direction at the start or end point. For smoothed feature lines, the extension follows the smoothed curve's tangent direction. |
| Get3dDistanceAtPoint | Gets the 3d distance at given point along the FeatureLine. |
| GetBulge | Gets the bulge at the index of feature line's segment. |
| GetCurveRadius | Gets the radius at the index of feature line's curve. |
| GetDeflectionAngleAtPoint | Gets the deflection angle in radians at given point along the FeatureLine. |
| GetGradeInAtPoint | Gets the in grade at given point along the FeatureLine. |
| GetGradeOutAtPoint | Gets the out grade at given point along the FeatureLine. |
| GetPointRelativeElevation | Returns the point's elevation, depending on the absolute or relative mode. Use the IsElevationRelativeToSurface() method to determine the elevation type. |
| GetPoints | Gets the feature line points by type. |
| GetReferenceInfo |
For Data Shortcut reference entity (IsReferenceObject == true), gets the entity's reference information.
(Inherited from Entity) |
| InsertElevationPoint | Inserts an elevation point along the FeatureLine. |
| InsertElevationPoints | Inserts multiple elevation points along the FeatureLine. |
| InsertPIPoint | Inserts a PI point along the FeatureLine. |
| IsElevationRelativeToSurface | Gets whether the point's elevation is absolute, or relative to the surface. Returns true when it's relative to the surface, false when it's an absolute elevation. |
| MoveToNoneSite | Move FeatureLine to none Site. |
| MoveToSite | Move FeatureLine to another Site. |
| SetBulge | Sets the bulge at the index of feature line's segment. |
| SetCurveRadius | Sets the radius at the index of feature line's curve. |
| SetPointElevation | Set an elevation to existing Feature Point. |
| SetPointRelativeElevation | Sets a point's elevtion, with the elevation value specified either as an absolute elevation, or a relative to surface elevation. |