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Geometry
16.3.1.7 Scale
Value that represents the transformation scale.
16.3.1.8 Inverse
An inverse transformation. Transformation matrix A is invertible if a transformation matrix B exists
such that A*B = B*A = I (identity).
16.3.1.9 IsIdentity
Boolean value that indicates whether this transformation is an identity.
16.3.1.10IsTranslation
Boolean value that indicates whether this transformation is a translation.
Geometry.Transform provides methods to perform basal matrix operations.
16.3.1.11Multiply
Multiplies a transformation by a specified transformation and returns the result.
Operator* - Multiplies two specified transforms.
16.3.1.12ScaleBasis
Scales the basis vectors and returns the result.
16.3.1.13ScaleBasisAndOrigin
Scales the basis vectors and the transformation origin returns the result.
16.3.1.14OfPoint
Applies the transformation to the point. The Origin property is used.
16.3.1.15OfVector
Applies the transform to the vector. The Origin property is not used.
16.3.1.16AlmostEqual
Compares two transformations. AlmostEqual is consistent with the computation mechanism and
accuracy in the Revit core code. Additionally, Equal and the == operator are not implemented in
the Transform class.
The API provides several shortcuts to complete geometry transformation. The Transformed
property in several geometry classes is used to do the work, as shown in the following table.
Class Name
Function Description
Curve.get_Transformed(Transform transform)
Applies the specified transformation to a curve
Instance.get_Transformed(Transform transform)
Transforms the instance.
Profile.get_Transformed(Transform transform)
Transforms the profile and returns the result.
Mesh.get_Transformed(Transform transform)
Transforms the mesh and returns the result.
Table 40: Transformed Methods
Note: The transformed method clones itself then returns the transformed cloned result.
16.3.2 Geometry.Reference
The Reference class does not contain properties or methods. However, it is very useful in element
creation.
Revit 2008 API User Manual
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