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This is not specific to OpenIGTLink. If transforms are changed while zooming in/out of a 3D view, the 3D view often gets corrupted (often the other view gets corrupted, too).
How to reproduce:
- switch to dual 3D layout
- load an STL model
- reset 3d view (to focus the box to the loaded 3D view)
- load mrhead sample
- show axial slice
- Run the following python script:
transform = slicer.vtkMRMLLinearTransformNode()
transform.SetName("Transform-moving")
slicer.mrmlScene.AddNode(transform)
transformYmin=-100
transformYmax=100
transformYinc=5
def pt():
global transformYinc
qt.QTimer.singleShot(100, pt)
oldElem=transform.GetMatrixTransformToParent().GetElement(0 ,3)
transform.GetMatrixTransformToParent().SetElement(0 ,3, -oldElem)
oldElem=transform.GetMatrixTransformToParent().GetElement(1 ,3)
oldElem=oldElem+transformYinc
transform.GetMatrixTransformToParent().SetElement(1 ,3, oldElem)
if oldElem > transformYmax or oldElem < transformYmin:
transformYinc=-transformYinc
pt()
- Apply Transform-moving to both the model and the MRhead image
- Zoom in/out the 3D view on the right side in quick succession, many times
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This cannot be reproduced anymore with recent nightly builds.
Used modified script (updated according to Slicer core changes):
<pre>
transform = slicer.vtkMRMLLinearTransformNode()
transform.SetName("Transform-moving")
slicer.mrmlScene.AddNode(transform)
transformYmin=-100
transformYmax=100
transformYinc=5
def pt():
global transformYinc
qt.QTimer.singleShot(100, pt)
t = vtk.vtkMatrix4x4()
transform.GetMatrixTransformToParent(t)
t.SetElement(0 ,3, -t.GetElement(0 ,3))
t.SetElement(1 ,3, t.GetElement(1 ,3)+transformYinc)
if t.GetElement(1 ,3) > transformYmax or t.GetElement(1 ,3) < transformYmin:
transformYinc = -transformYinc
transform.SetMatrixTransformToParent(t)
pt()
</pre> |
