Documentation/Nightly/Developers/Tutorials/MigrationGuide/Slicer
MRML: Slicer 4.5: Introduction of vtkMRMLLabelMapVolumeNode
Rational:
Before vtkMRMLScalarVolumeNode was used for both scalar and label map volumes and the LabelMap custom MRML node attribute was used for distinguishing between them (0=scalar; 1=label map volume).
This made conversion between labelmap/scalar volumes very easy but made it difficult to customize behavior, display, processing of segmentation information.
Now a new vtkMRMLLabelMapVolumeNode class is used for storing segmentation information (still using vtkMRMLScalarVolume used as base class for backward compatibility; but in the future the base class may be changed to reflect that segmentation can be represented in various ways, not just as volumes).
Error message similar to:
error: ‘class vtkMRMLScalarVolumeNode’ has no member named ‘SetLabelMap’ outputVolumeNode->SetLabelMap(1); ^
Solution (part1: down cast to vtkMRMLLabelMapVolumeNode, remove call to SetLabelMap)
Replace lines like:
vtkMRMLNode* outputNode = d->OutputLabelVolumeMRMLNodeComboBox->currentNode(); vtkMRMLScalarVolumeNode* outputVolumeNode = vtkMRMLScalarVolumeNode::SafeDownCast(outputNode); [...] outputVolumeNode->SetLabelMap(1);
with:
vtkMRMLLabelMapVolumeNode* outputVolumeNode = vtkMRMLLabelMapVolumeNode::SafeDownCast(d->OutputLabelVolumeMRMLNodeComboBox->currentNode()); [...]
Solution (part2: Update UI file):
Replace lines like:
<widget class="qMRMLNodeComboBox" name="InputLabelVolumeMRMLNodeComboBox"> <property name="nodeTypes"> <stringlist> <string>vtkMRMLScalarVolumeNode</string> </stringlist> </property> [...] </widget>
with:
<widget class="qMRMLNodeComboBox" name="InputLabelVolumeMRMLNodeComboBox"> <property name="nodeTypes"> <stringlist> <string>vtkMRMLLabelMapVolumeNode</string> <------------- Update Here </stringlist> </property> [...] </widget>
Solution (part3: Update node selector configuration):
Replace lines like:
nodeSelector.setNodeTypes(QStringList("vtkMRMLScalarVolumeNode")); nodeSelector.addAttribute("vtkMRMLScalarVolumeNode", "LabelMap", "1");
with:
nodeSelector.setNodeTypes(QStringList("vtkMRMLLabelMapVolumeNode"));
References: