thank you Sascha!
OK, I think you understood what I want but, in any case, lets see if I
can explain in a different way what I intend to do with my project and MITK.
This project I am working in will have the need of MITK basic
functionality like integration with Qt, DICOM importer and the plugin
concept.
Several plugins will be developed like registration, segmentation and
visualization of medical data. I am responsible for the last one and
these 3 (or more) plugins will have to work together.
In these plugins we will be developing new algorithms and, in my
specific case, I will have to work with low level programming,
algorithms and profiling for high quality interactive volume rendering.
This is why I need to work with certain libraries on the side (OpenCL,
CUDA, etc).
I believe I will develop a new graphic engine from scratch by not using
VTK or ITK, but a rather top notch, low level, high tuned graphic engine
for volume rendering and data analysis.
Right now I want to do some basic volume rendering to get a feel of MITK
and how it works. I have a Ray tracing background on C/C++ and I am used
to have access to all data structures (in that case: triangles,
accelerating data structures and rays). I would generate a BVH with the
triangles positions, and with that, access each pre-generated ray, and
do the necessary calculations in order to obtain an image.
So basically I just want to have access to these data structures,
perform some ray casting to check for voxels information and generate a
very basic image.
MITK is a big framework, and I just cant find those data structures or
how to access them. From the last email you sent, I am guessing I will
have to "create a mapper" having my rendering engine and its properties
in there. Unfortunately I do not understand the structure of MITK. The
documentation, at least for me, isn't clear enough. Don´t you have a
some drawings or UML graphics explaining the platform in general with
the main classes, factories, mappers, etc. and how its all related?
Regarding the code I sent before, I get a << Unhandled exception at
0x000007fee71fa57b (Mitk.dll) in MyTest.exe: 0xC0000005: Access
violation reading location 0x0000000000000090. >>
I believe it is a null pointer at:
mitk::BaseData::Pointer bdata = dnode->GetData();
I am running this code on the MyView.cpp file that was created using the
plugin generator. I haven't change any other file outside the source
files provided in the plugin project.
I am sure we can work all this out through easily :-)
Best,
Miguel
On 30.10.2012 12:59, Sascha Zelzer wrote:
> Hi,
>
> On 10/29/2012 06:07 PM, Miguel Nunes wrote:
>> Hi Sascha,
>>
>> I have been checking the documentation and the code around workbench and
>> I still cant understand how loading data is processed and where it is
>> stored. I apologize, but I don't understand what these mappers are. I
>> have been, for a week now, trying to understand and creating a simple
>> example-plugin for me.
> No problem. I have the feeling that I didn't fully understand what you
> want to do. From your previous mails, I thought that you would like to
> use custom visualization code and render certain data objects (medical
> images, surfaces,...?) in a specific way. This is way I pointed you
> into the "mappers" direction.
>
> Maybe it would help if you try again to explain your specific use case.
>
>> Is there any place (docs, example, thread) that discusses and explain
>> this in detail?
> We have a general "Concepts" site:
> http://docs.mitk.org/nightly-qt4/Concepts.html
>
> While I think our documentation has improved a lot in the last year,
> there are certainly topics on which we could improve.
>
>> I just want to know how to access the data I loaded into the workbench.
>>
>> I am trying to do, on my plugin cpp:
>>
>> mitk::DataStorage::Pointer m_DataStorage;
>> mitk::IDataStorageReference::Pointer ref =
>> this->GetDataStorageReference();
>>
>> if (ref.IsNotNull()) m_DataStorage = ref->GetDataStorage();
>> else return;
>>
>> mitk::DataNode::Pointer dnode = m_DataStorage->GetNode();
>>
>> mitk::BaseData::Pointer bdata = dnode->GetData();
>> mitk::Geometry3D::Pointer geo3d = bdata->GetGeometry();
>>
>>
>> does this make any sense? I get a error while running this, like there
>> is no data. Should I get an "instance"? am I looking in the wrong place?
> Looks approximately right, if you are trying to access existing data
> from a plug-in (e.g. from inside a View). Could you please provide
> more context information and exact error messages?
>
>> I am sorry but this is starting to be a little annoying.
> No worries. As said above, maybe we should start over and try to state
> your use-case in more detail.
>
> Best,
> Sascha
--
Miguel Nunes, MSc. mail: [email protected]
Early Stage Researcher tel: +43(0)1 20501 30504
VRVis Zentrum fuer Virtual Reality und Visualisierung
Forschungs-GmbH FN: 195369h, HG Wien
Donau-City-Straße 1 +43(0)1 20501 30100
A-1220 Wien, Austria web:<http://www.vrvis.at>
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