IsLinearIsLinear - Is the Mapping linear?

Description:
This attribute indicates whether a MappingMapping is an instance of a class that always represents a linear transformation. Note, some Mapping classes can represent linear or non-linear transformations (the MathMapMathMap class for instance). Such classes have a zero value for the IsLinear attribute. Specific instances of such classes can be tested for linearity using the astLinearApproxastLinearApprox function. AST_LINEARAPPROX routine.
Type:
Integer (boolean), read-only.
Class Applicability:
Mapping
All Mappings have this attribute.
CmpMapCmpMap
The IsLinear value for a CmpMap is determined by the classes of the encapsulated Mappings. For instance, a CmpMap that combines a ZoomMapZoomMap and a ShiftMapShiftMap will have a non-zero value for its IsLinear attribute, but a CmpMap that contains a MathMap will have a value of zero for its IsLinear attribute.
FrameFrame
The IsLinear value for a Frame is 1 (since a Frame is equivalent to a UnitMapUnitMap).
FrameSetFrameSet
The IsLinear value for a FrameSet is obtained from the Mapping from the base Frame to the current Frame.