[Insight-developers] strange casting/overloading issues

[Richard Beare]

Hi,
I've seen some strange outcomes from a very simple pipeline that I'd
like some advice tracking down.

The pipeline is  TriangularMeshToBinaryImageFilter->MaskImageFilter->Writer

If I connect the writer directly to the MaskImageFilter  :
writer->SetInput(masker->GetOutput()), I get a very small output
image, which I suspect is some representation of the pointer. If I do

std::cout << masker->GetOutput()

I get the pointer value, not the image information which I thought I
usually got.

If I add an intermediate step:

ImageType::Pointer maskresult = masker->GetOutput();

writer->SetInput(maskresult);

everything seems to work as expected.

I don't seem to be able to reproduce the problem with just the mask
filter. I suspect some subtle pipeline related interaction or casting
issue - any debugging suggestions?