[Insight-developers] Lots of new warnings: Adding an alternative GetInverse() method to the transform hierarchy.

[Steve M. Robbins]

On Sat, Jun 28, 2008 at 10:50:22PM -0400, Luis Ibanez wrote:

> This may help to find a better choice among the current options
> of API for GetInverse().

Among the options proposed, returning a pointer to the transformation
is most appealing to me:

       virtual TransformBase::Pointer  GetInverse() const

with the guarantee that the pointer is never null; i.e. that
non-invertibility is signalled by an exception.

In addition, I would propose that

       virtual bool IsInvertible() const

be available so that programs that *do* want to check for
invertibility can do so without using a try/catch.

Regards,
-Steve
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