Determines if two transforms are effectively the same.
Transforms contain a set of elements which are represented as
floating point numbers. Floating point numbers are subject to
rounding errors so the epsilon value is used to determine the
resolution of the comparison. Only if two elements differ by more
than the value of epsilon will they be defined as not equal.
Internally Acrobat uses double precision floating point numbers
for a very high level of accuracy. However within a PDF itself
these numbers are typically only represented to around five decimal
points. You may wish to represent similar levels of accuracy in
your epsilon values. The default epsilon is zero so by default,
transforms have to match perfectly for them to be considered
equal.
