2012 Project Week:QT3DTextRendering

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  Projects List

Key Investigators

• Kitware: Julien Finet
• Isomics: Steve Pieper
• BWH: Nicole Aucoin

Objective

• Investigate to see if we can replace the VTK text actors with a Qt 3D text solution in the 3D viewer
  • considerations are both speed (support hundreds of fiducials in a scene and keep interaction speedy) and appearance (get rid of aliasing effects)

Approach, Plan

• Implement a proof of concept to see if we can get Qt text rendered in 3D
• Do timing tests head to head with VTK text to see if rendering speed is increased

Progress

• Julien and Nicole talked early in the week to discuss possible approaches
  • update vtkTextActor to reduce aliasing: not practical
  • do a Qt rendering to QImage and texture map that onto an actor that can be situated in 3d space: possible
• First step is unit testing to determine slow down factor of many fiducials with and without text
  • Render time is a lot faster now, better appearance of the letters is the main factor
• Investigating the vtkQtLabelRenderStrategy class to see if it can be extended to 3D
  • will require a fair amount of coding, working on an example/test

Delivery Mechanism

This work will be delivered to the NA-MIC Kit as a

1. ITK Module
2. Slicer Module
   1. Built-in
   2. Extension -- commandline
   3. Extension -- loadable
3. Other (Please specify) Proof of concept

References