Revit 2026 API
Arc Class |
A circular arc.
Inheritance HierarchySystemObject
Autodesk.Revit.DBAPIObject
Autodesk.Revit.DBGeometryObject
Autodesk.Revit.DBCurve
Autodesk.Revit.DBArc
Autodesk.Revit.DBAPIObject
Autodesk.Revit.DBGeometryObject
Autodesk.Revit.DBCurve
Autodesk.Revit.DBArc
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.0.4.0 (26.0.4.0)
Syntax
The Arc type exposes the following members.
Properties| Name | Description | |
|---|---|---|
 | ApproximateLength | The approximate length of the curve. (Inherited from Curve) |
| Center | Returns the center of the arc. |
| GraphicsStyleId | The ElementId of the GeometryObject's GraphicsStyle (Inherited from GeometryObject) |
| Id | A unique integer identifying the GeometryObject in its associated non view-specific GeometryElement. (Inherited from GeometryObject) |
| IsBound | Describes whether the parameter of the curve is restricted to a particular interval. (Inherited from Curve) |
| IsClosed | Describes whether the curve is closed. (Inherited from Curve) |
| IsCyclic | The boolean value that indicates whether this curve is cyclic. (Inherited from Curve) |
| IsElementGeometry | Indicates whether this geometry is obtained directly from an Element. (Inherited from GeometryObject) |
| IsReadOnly | Identifies if the object is read-only or modifiable. (Inherited from APIObject) |
| Length | The exact length of the curve. (Inherited from Curve) |
| Normal | Returns the normal to the plane in which the arc is defined. |
| Period | The period of this curve. (Inherited from Curve) |
| Radius | Returns the radius of the arc. |
| Reference | Returns a stable reference to the curve. (Inherited from Curve) |
| Visibility | The visibility. (Inherited from GeometryObject) |
| XDirection | Returns the X direction. |
| YDirection | Returns the Y direction. |
Methods| Name | Description | |
|---|---|---|
 | Clone | Returns a copy of this curve. (Inherited from Curve) |
| ComputeClosestPoints | (Inherited from Curve) |
| ComputeDerivatives |
Returns the vectors describing the curve at the specified parameter.
(Inherited from Curve) |
| ComputeNormalizedParameter | Computes the normalized curve parameter from the raw parameter. (Inherited from Curve) |
| ComputeRawParameter | Computes the raw parameter from the normalized parameter. (Inherited from Curve) |
 | Create(XYZ, XYZ, XYZ) | Creates a new geometric arc object based on three points. |
| Create(Plane, Double, Double, Double) | Creates a new geometric arc object based on plane, radius, and angles. |
| Create(XYZ, Double, Double, Double, XYZ, XYZ) | Creates a new geometric arc object based on center, radius, unit vectors, and angles. |
| CreateOffset |
Creates a new curve that is an offset of the existing curve.
(Inherited from Curve) |
| CreateReversed |
Creates a new curve with the opposite orientation of the existing curve.
(Inherited from Curve) |
| CreateTransformed |
Crates a new instance of a curve as a transformation of this curve.
(Inherited from Curve) |
| Dispose | Causes the object to release immediately any resources it may be utilizing. (Inherited from APIObject) |
| Distance | Returns the shortest distance from the specified point to this curve. (Inherited from Curve) |
| Equals | Determines whether the specified Object is equal to the current Object. (Inherited from GeometryObject) |
| Evaluate |
Evaluates and returns the point that matches a parameter along the curve.
(Inherited from Curve) |
| GetEndParameter |
Returns the raw parameter value at the start or end of this curve.
(Inherited from Curve) |
| GetEndPoint |
Returns the 3D point at the start or end of this curve.
(Inherited from Curve) |
| GetEndPointReference | Returns a stable reference to the start point or the end point of the curve. (Inherited from Curve) |
| GetHashCode |
Gets the integer value of the geometry object as hash code
(Inherited from GeometryObject) |
| GetType | Gets the Type of the current instance. (Inherited from Object) |
| Intersect(Curve) | Obsolete. Calculates the intersection of this curve with the specified curve. (Inherited from Curve) |
| Intersect(Curve, CurveIntersectResultOption) | Calculates the intersection of this curve with the specified curve. (Inherited from Curve) |
| Intersect(Curve, IntersectionResultArray) | Obsolete. Calculates the intersection of this curve with the specified curve and returns the intersection results. (Inherited from Curve) |
| IsInside(Double) | Indicates whether the specified parameter value is within this curve's bounds. (Inherited from Curve) |
| IsInside(Double, Int32) | Indicates whether the specified parameter value is within this curve's bounds and outputs the end index. (Inherited from Curve) |
| MakeBound | Changes the bounds of this curve to the specified values. (Inherited from Curve) |
| MakeUnbound | Makes this curve unbound. (Inherited from Curve) |
| Project | Projects the specified point on this curve. (Inherited from Curve) |
| SetGraphicsStyleId | Sets the graphics style id for this curve. (Inherited from Curve) |
| Tessellate | Valid only if the curve is bound. Returns a polyline approximation to the curve.
(Inherited from Curve) |
| ToString | Returns a string that represents the current object. (Inherited from Object) |
RemarksThe arc lies in the plane defined by center and normal.
See Also