Excellent, I'm happy to know you're on the right track.
Have fun!
Luca
On Mar 18, 2012, at 1:30 PM, Lia Silva wrote:
> Em 18-03-2012 11:56, Luca Antiga escreveu:
>>
>> Hi Lia,
>> that's not quite what I intended. I'll you a few more explicit suggestions:
>>
>> 1) all the algorithms in vmtk are already in C++. The fact that you're using
>> them
>> in vmtk scripts is just for convenience. Note that this does not impose
>> *any* overhead,
>> speed-wise.
>>
>> 2) make sure you understand why you need to have a C++-only code. Is
>> it for speed only? See point 1). Is if because you want to incorporate vmtk
>> in
>> a purely C++ program? This would make more sense.
>>
>> 3) every algorithm in vmtk is a VTK class. If you know how to program in C++
>> using VTK,
>> you know how to program in C++ using vmtk. So, make sure you are proficient
>> writing
>> VTK code before you move on with vmtk. There's a great resource of examples
>> here:
>> http://www.vtk.org/Wiki/VTK/Examples/Cxx
>>
>> 4) Once you have addressed 1-3, have a look into vmtk/vmtkScripts and
>> identify the scripts
>> you're interested in and take a look at what classes are used. For instance,
>> the code for
>> vmtksurfacetriangle is
>>
>> cleaner = vtk.vtkCleanPolyData()
>> cleaner.SetInput(self.Surface)
>> cleaner.Update()
>>
>> triangleFilter = vtk.vtkTriangleFilter()
>> triangleFilter.SetInput(cleaner.GetOutput())
>> triangleFilter.Update()
>>
>> self.Surface = triangleFilter.GetOutput()
>>
>> which in C++ would become
>>
>> vtkCleanPolyData* cleaner = vtkCleanPolyData::New();
>> cleaner->SetInput(surface);
>> cleaner->Update();
>>
>> vtkTriangleFilter* triangleFilter = vtkTriangleFilter::New();
>> triangleFilter->SetInput(cleaner->GetOutput());
>> triangleFilter->Update();
>>
>> surface = triangleFilter->GetOutput();
>>
>> As you see, the high-level code is almost exactly the same, and in both
>> cases, the call to Update triggers code that is already written in C++.
>>
>> Hope this helps clarifying, but most of all, what you should clarify is
>> point 2, i.e. what
>> is the need you're trying to address when you say you want pure C++ code.
>>
>> Best regards
>>
>> Luca
>>
>>
>> On Mar 17, 2012, at 6:41 PM, Lia Silva wrote:
>>
>>> Em 17-03-2012 07:40, Luca Antiga escreveu:
>>>>
>>>> Dear Lia,
>>>> vmtk code presents itself as Python code, but it is in fact a tiny
>>>> wrapper
>>>> on top of C++ code. All algorithms are already implemented in C++ (see
>>>> vmtk/vtkVmtk directory). If you look for code optimizations, you should
>>>> look
>>>> into the C++ code in that directory.
>>>> Best regards
>>>>
>>>> Luca
>>>>
>>>>
>>>> --
>>>> Luca Antiga, PhD
>>>> Cofounder and Principal Scientist, Orobix Srl
>>>> via L.A. Muratori 3, 24123 Bergamo, Italy
>>>>
>>>> orobix: www.orobix.com
>>>> home: lantiga.github.com
>>>> twitter: twitter.com/lantiga
>>>>
>>>> On Mar 17, 2012, at 12:50 AM, Lia Silva wrote:
>>>>
>>>>>
>>>>>
>>>>> Hello all!
>>>>>
>>>>> How can i convert a vmtk code into c++ code, so i can run it faster? The
>>>>> code in vmtk it's attached.
>>>>>
>>>>> Thank you in advance
>>>>>
>>>>>
>>>>>
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>>>>
>>> So, it means that i have to implement all in c++ since the beginning? For
>>> example, i used the vmtkimagereader, so in c++ i've to use
>>> Dicomseriereadprinttagswrite? And for the vmtkimagevoiselector i have to
>>> use the RegionofInterestImageFilter? Is that it? I'm so confused... Isn't
>>> there another way easier and faster? I thought i could convert directly
>>> into c++..
>>>
>>> Thank you for all your pacience
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>>
>> Não foram detectados vírus nesta mensagem.
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>> Lançamento: 03/18/12
>>
> Dear Luca,
>
> Thank you for the answer. It was very helpfull. In fact, the main reason i
> want to use just C++ isn't just to make it faster. This is also a reason, but
> i dont know how exactly vmtk works, and i need to do a
> automatic/semi-automatic tool for measure the aorta diameter. I found vmtk by
> accident and i liked it very much cause its easier to work with, but i dont
> know if i can make a automatic tool using it (i dont know how to automatize
> the process) . In my circle, nobody knows vmtk, and my thesis' supervisor
> just work with c++, so i'm going forward using vmtk (cause i dont have much
> experience with c++ and vmtk scripts are easier for me) and later, i pretend
> to convert into c++ so my supervisor can correct it.
>
> You gave me an excellent help and now i'm doing the step 4 by seeing the vmtk
> scripts. If i have any addicional doubt, i hope i can count on you.
>
> Thank you very much for your pacience and dedication.
>
> Best regards
>
> Lia
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