woops my bad! I guess I was thinking of chapter 11 & 13 in the VTK user
guide...
Michael Jackson wrote:
great. Thanks. I actually have the ParaView User Guide for ParaView 3,
could you point me in the general vicinity in the user guide where
this is explained? The index wasn't much help but I am probably not
looking up the correct terms.
Thanks
--
Mike Jackson <www.bluequartz.net>
On Jan 15, 2010, at 1:00 PM, burlen wrote:
It doesn't have to be be a composite data algorithm or operate on
composite data. There are two options available without delving into
composite data, 1) make multiple inputs, 2) make a single input
repeatable.
in option 1)
class vtkMyFilter : public vtkImageDataAlgorithm
{
...
};
vtkMyFilter::vtkMyFilter()
{
...
this->SetNumberOfInputPorts(3);
}
or in option 2)
class vtkMyFilter : public vtkImageDataAlgorithm
{
...
};
vtkMyFilter::vtkMyFilter()
{
...
this->SetNumberOfInputPorts(1);
}
int vtkMyFilter::FillInputPortInformation(int port, vtkInformation
*info)
{
...
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkImageData");
info->Set(vtkAlgorithm::INPUT_IS_REPEATABLE(),1);
}
during request data in option 1) you get a vector of information
objects each with one dataset, in 2) you get a vector of datasets in
one information object. The UI differs in the way the inputs are
selected, option 1) will be more clear that 3 are required.
This is explained (much better) in the user guide along with
composite data algorithm.
Michael Jackson wrote:
I have an algorithm that needs to take 3 inputs. All three will be
vtkImageData objects using Floating point values. I was wondering,
before I even start anything, does the first data set in the
pipeline have to be a composite data set so if I apply the filter I
can assign specific "pieces" of the composite data set as inputs to
the filter I am designing? What would be an example of a filter that
takes multiple inputs that I could look at as an example?
Thanks for any help.
___________________________________________________________
Mike Jackson www.bluequartz.net
Principal Software Engineer mike.jack...@bluequartz.net
BlueQuartz Software Dayton, Ohio
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