On Tue, Jun 3, 2014 at 3:28 PM, Rik Cabanier <caban...@gmail.com> wrote:

> Yes, isIdentity is used as an indication that nothing needs to be done or
> that the transform hasn't changed.
> Maybe we should rename it to isDefault, isInitial or isNoOp?
>

I think isIdentity is the right name.

Glancing through Gecko I see places where we're able to entirely skip
possibly-expensive transformation steps if we have an identity matrix, so I
guess isIdentity is useful to have since even if we make
multiplication-by-identity free, checking isIdentity might mean you can
completely avoid traversing some application data structure.

Rob
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