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0010102

VTK

(No Category)

public

2010-01-06 17:00

2016-08-12 09:55

Reporter

Scott Settlemier

Assigned To

Kitware Robot

Priority

normal

Severity

major

Reproducibility

always

Status

closed

Resolution

moved

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Target Version

Fixed in Version

Summary

0010102: quaternion interpolator has numerical problems

Description

I 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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Notes
(0037133) Kitware Robot (administrator) 2016-08-12 09:55	Resolving issue as `moved`. This issue tracker is no longer used. Further discussion of this issue may take place in the current VTK Issues page linked in the banner at the top of this page.

Issue History
Date Modified	Username	Field	Change
2010-01-06 17:00	Scott Settlemier	New Issue
2011-06-16 13:11	Zack Galbreath	Category	=> (No Category)
2016-08-12 09:55	Kitware Robot	Note Added: 0037133
2016-08-12 09:55	Kitware Robot	Status	expired => closed
2016-08-12 09:55	Kitware Robot	Resolution	open => moved
2016-08-12 09:55	Kitware Robot	Assigned To	=> Kitware Robot