UpdateBot: Nightly -> 4.4

2014-12-25T06:52:24Z

Nightly -> 4.4

New page

<noinclude>{{documentation/versioncheck}}</noinclude>
<noinclude>__TOC__
={{#titleparts: {{PAGENAME}} | | -1 }}=</noinclude><includeonly>
='''Developer FAQ: {{{1}}}'''=
</includeonly>

== How to add a MRML node into the scene ? ==

* Generic pattern
<code>
vtkNew<vtkMRML???Node> nodeToAdd;
...
mrmlScene->AddNode(nodeToAdd.GetPointer());
</code>

* Add a polydata to the scene
<code>
vtkNew<vtkMRMLModelNode> modelNode;
modelNode->SetPolyData(polyData);
mrmlScene->AddNode(modelNode.GetPointer());
</code>

* Load a polyData from file
<code>
vtkSlicerModelsLogic* modelsLogic = ...;
//modelsLogic->SetMRMLScene(mrmlScene);
modelsLogic->AddModel(polyDataFileName);
</code>

== What to do if you get 'No LookupTable was set but number of components in input doesn't match OutputFormat' when loading a MRML scene ? ==

If you get the following error messages:
<pre>
ERROR: In /path/to/VTK/Imaging/vtkImageMapToColors.cxx, line 153
vtkImageMapToColors (0x268f190): RequestInformation: No LookupTable was set but number of components in input doesn't match OutputFormat, therefore input can't be passed through!

ERROR: In /path/to/VTK/Imaging/vtkImageExtractComponents.cxx, line 239
vtkImageExtractComponents (0x26947e0): Execute: Component 1 is not in input.

ERROR: In /path/to/VTK/Imaging/vtkImageExtractComponents.cxx, line 239
vtkImageExtractComponents (0x26947e0): Execute: Component 1 is not in input.

[...]
</pre>

Make sure the <code>colorNodeRef</code> attribute is set on each <code>VolumeDisplay</code> node.

== How to change the volumes in the 2D views ? ==

<code>
appLogic = slicer.app.applicationLogic()
selectionNode = appLogic.GetSelectionNode()
selectionNode.SetReferenceActiveVolumeID(bg)
selectionNode.SetReferenceSecondaryVolumeID(fg)
appLogic.PropagateVolumeSelection()
</code>

Source: https://github.com/fedorov/ChangeTrackerPy/blob/master/Wizard/Helper.py#L82

Documentation/4.4/Developers/FAQ/MRML - Revision history

UpdateBot: Nightly -> 4.4