Dear Mitk users,
I am working on an application using Mitk as a library. For technical
reasons, I had to use an existing framework and could not develop an
Mitk module or plug-in.
The aim of the application is to load a DICOM image and segment it.
I am facing an issue with volume rendering: I would like the
segmentation volume to be visible in 3D, and updated in real time
(similarly to what exists in the workbench).
Looking into the MITK code, I thought I could simply create a mapper and
assign it to my data node, but this crashes the code with the following
message:
"Exception caught: reading access violation.
this->ImageDisplayHelper was nullptr."
The offending line is in the file vtkFixedPointVolumeRayCastMapper.cxx,
l717:
"this->ImageDisplayHelper->PreMultipliedColorsOn();".
Below is a snippet of my code:
// Created a node called totalDataNode, added it to the datastorage
mitk::Mapper::Pointer totalMapper;
totalMapper = mitk::GPUVolumeMapper3D::New();
totalMapper->SetDefaultProperties(totalDataNode);
totalMapper->SetDataNode(totalDataNode);
totalDataNode->SetMapper(2, totalMapper);
totalDataNode->SetProperty("volumerendering",
mitk::BoolProperty::New(true));
totalDataNode->SetProperty("volumerendering.uselod",
mitk::BoolProperty::New(true));
totalDataNode->SetProperty("volumerendering.usegpu",
mitk::BoolProperty::New(false));
totalDataNode->SetProperty("volumerendering.useray",
mitk::BoolProperty::New(false));
totalDataNode->SetProperty("volumerendering.usemip",
mitk::BoolProperty::New(false));
The line
totalDataNode->SetProperty("volumerendering",
mitk::BoolProperty::New(true));
triggers the error.
Does anybody know of the correct way to create and use a mapper? I would
greatly appreciate any help.
Thanks in advance!
Daphné
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