All of those conditions are optimized equivalents to getting the determinant.
invert() is a destructive call, but since getTransform is documented to return a copy, that is fine - but
getDeterminant() will involve less math to check the condition...
...jim
On 9/27/16 6:33 AM, Clemens Eisserer wrote:
Hi Sergey
I guess you can use "getDeterminant()==0" to determine if this transform has
no inverse?
Initially I had the same idea, but looking at the implementation of
invert(), I found several different conditions leading to an
NoninvertibleTransformException. So I decided to keep the call to
invert(), as the code-path shouldn't be performance critical anyway.
Best regards, Clemens
