Revit 2025.3 API
EdgeCompute |
Returns the vectors describing the edge at the specified parameter.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.3.0.0 (25.3.0.0)
Syntax
public Transform ComputeDerivatives( double parameter )
Public Function ComputeDerivatives ( parameter As Double ) As Transform
public: Transform^ ComputeDerivatives( double parameter )
member ComputeDerivatives : parameter : float -> Transform
Parameters
- parameter Double
- The parameter to be evaluated.
Return Value
TransformThe transformation containing a tangent vector, derivative of tangent vector, and bi-normal vector.

The following is the meaning of the transformation members:
- Origin is the point on the edge (equivalent to Evaluate);
- BasisX is the tangent vector (the first derivative);
- BasisY is the second derivative;
- BasisZ is the bi-normal vector (tangent x normal).
See Also