MantisBT - VTK
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IDProjectCategoryView StatusDate SubmittedLast Update
0010102VTK(No Category)public2010-01-06 17:002016-08-12 09:55
ReporterScott Settlemier 
Assigned ToKitware Robot 
PrioritynormalSeveritymajorReproducibilityalways
StatusclosedResolutionmoved 
PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
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Summary0010102: quaternion interpolator has numerical problems
DescriptionI think the quaternion interpolator is using operations which're numerically unstable as the orientations approach one another. In particular, vtkQuaternionInterpolator::InnerPoint() will return an undefined orientation for very similar (just equal?) inputs.

This will demonstrate the issue:
    vtkTransformInterpolator* interp = vtkTransformInterpolator::New();
    vtkTransform* x = vtkTransform::New();
    x->Identity();
    interp->AddTransform(0, x);
    interp->AddTransform(1, x);
    interp->AddTransform(2, x);
    interp->InterpolateTransform(0.5, x);


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Issue History
Date ModifiedUsernameFieldChange
2010-01-06 17:00Scott SettlemierNew Issue
2011-06-16 13:11Zack GalbreathCategory => (No Category)
2016-08-12 09:55Kitware RobotNote Added: 0037133
2016-08-12 09:55Kitware RobotStatusexpired => closed
2016-08-12 09:55Kitware RobotResolutionopen => moved
2016-08-12 09:55Kitware RobotAssigned To => Kitware Robot

Notes
(0037133)
Kitware Robot   
2016-08-12 09:55   
Resolving issue as `moved`.

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