View source for 2009 Summer Project Week VTK 3D Widgets In Slicer3

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Image:PW2009-v3.png|[[2009_Summer_Project_Week|Project Week Main Page]]
Image:SlicerMeasurementGUI-3.5-prototype.jpg|Prototype Measurements module GUI
Image:Slicer3AffineWidget.jpg|Affine widget used to modify a transform around the moving volume
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==Key Investigators==
* BWH: Nicole Aucoin, Wendy Plesniak
* Kitware: Karthik Krishnan, Sebastien Barre

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<h3>Objective</h3>
To integrate further VTK 3D widgets into Slier.

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<h3>Approach, Plan</h3>
Our approach is to discuss user interaction models, and how the mouse modes can be expanded

Our plan for the project week is to first try out a few sample GUI integrations.  
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<h3>Progress</h3>
Before Project Week starts, Nicole hopes to have a prototype of the Fiducials module using the VTK 5.4 vtkSeedWidget that Karthik has updated by her request.

*Prototype Measurement module checked in, builds and loads if Slicer3 is compiled with VTK5.4. Provides a ruler and an angle widget. 
**TODO: bind end points to models.
***works if the end points are on top of the models, snapping to the model is not working
**Is it possible to add vtkDistanceRepresentation3D to VTK? The ruler is using a 2D representation and the axis is rendering in the focal plane, above models. 
** Trying out vtkLineWidget2 with vtkLineRepresentation with the flag DistanceAnnotationVisibilityOn(). 
***Works, but label scales with length of line.
****Have to set a label sale so that the text doesn't scale with length of line
***Is there a way to colour each point handle widget differently (it uses clones of the handle widget): no. Try mapping to the ends near the label versus far from label
**Can the angle widget label scale on zoom?
*Added vtkAffineWidget to do 3d editing of transforms
**the vtkAffineRepresentation2D allows manipulation of translation in the XY plane, either need three of them, or to have a Representation3D added to VTK
*Working on a revamped vtSlicerFiducialListWidget using vtkSeedWidget, so much simpler than the current implementation!

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==References==

* [http://wiki.na-mic.org/Wiki/index.php/2009_Winter_Project_Week_Interactive_3D_Widgets_In_Slicer3  2009 Winter project week]
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