[Insight-users] forcing pipeline to update

[Karthik Krishnan]

You should be fine with the code... Did you see if Modified() was called 
along the way ?..

You need to ensure in the transforms you have created that any time any 
of the transform's ivars are changed you call this->Modified()

The Set/Get macros do this for you automatically... See Common/itkMacro.h

I do not know how you use your VectorContainer of transforms within this 
'ComposeUniformTransformsTransform'. Since VectorContainer is a subclass 
of itk::Object, if its contents are modified, it should update its 
modification time causing ComposeUniformTransformsTransform's 
modification time to change.. but you might want to check yourself if 
this is indeed true.

HTH
Karthik

Jakub Bican wrote:

>
>
> AHA! :))
>
> I have my own transforms that might be doing something wrong so that 
> resample filter is not "modified" when the transform is.
>
> I wrote a ComposeUniformTransformsTransform that has an array of 
> transforms and transforms point by consecutively transforming it by 
> transforms in the array. "Uniform" in the classname means that the 
> transforms should preserve the Dimension (i was not able to program 
> such class that can chain transforms with arbitrary dimensionality). 
> The meaning of such transform is to avoid chaining several resample 
> filters where several successive transforms are neccessary.
>
> In this my app, i use PolarToCartesianTransform, succeeded by 
> PermuteAxesTransform which enables me to use polar coordinates in 
> various orthogonal directions. These classes are composed with 
> previous class.
>
> Now - i need resample filter to compute several instances of 
> transformed image with various permutations set into 
> PermuteAxesTransform - and there was the problem...
>
> I am attaching sources of mentioned classes - in following days, i 
> will try to improve them to support "modified" features correctly. I 
> would be grateful, if you take a look at the sources and help me with 
> fixing this (and any other problem that you find), or even provide 
> some information, what should i follow (in docs, examples, etc).
>
> I am sorry that i did not post the problem as it lays first. I wanted 
> to sketch the situation without having obscure with too many details 
> which i considered unimportant ;)
>
> Thanks,
>     Jakub
>
>