Revit uses a variety of curve types to represent face geometry in a document. These include:
|
Face type |
Revit API class |
Definition |
Notes |
|
Plane |
PlanarFace |
A plane defined by the origin and unit vectors in U and V. |
|
|
Cylinder |
CylindricalFace |
A face defined by extruding a circle along an axis. |
.Radius provides the “radius vectors” – the unit vectors of the circle multiplied by the radius value. |
|
Cone |
ConicalFace |
A face defined by rotation of a line about an axis. |
.Radius provides the “radius vectors” – the unit vectors of the circle multiplied by the radius value. |
|
Revolved face |
RevolvedFace |
A face defined by rotation of an arbitrary curve about an axis. |
.Radius provides the unit vectors of the plane of rotation, there is no “radius” involved. |
|
Ruled surface |
RuledFace |
A face defined by sweeping a line between two profile curves, or one profile curve and one point. |
Both curve(s) and point(s) can be obtained as properties. |
|
Hermite face |
HermiteFace |
A face defined by Hermite interpolation between points. |
Mathematical representations of all of the Revit face types can be found here.