[vtk-developers] A vtkDataSampler and image interpolation

[Will Schroeder]

David-

What's the relationship of this vtkDataSampler class to the vtkProbeFilter?

W

On Mon, Jul 4, 2011 at 1:23 PM, David Gobbi <david.gobbi at gmail.com> wrote:

> Hi All,
>
> I've written some new interpolation classes for VTK, both for images
> and for other data sets.  One thing that I want to ensure is that the
> abstract interface is something that people will be satisfied with.
> I use the same ScalarMode constants as vtkMapper, but there might
> be a better way of selecting arrays that I am not aware of:
>
> class vtkDataSampler : public vtkObject
> {
>  // set the data to interpolate (does not establish pipeline connection)
>  void SetInput(vtkDataObject *);
>
>  // update any internal state variables prior to commencing interpolation
>  void Update();
>
>  // get an interpolated value, return "false" if out of bounds
>  bool GetSample(const double point[3], double *value);
>
>  // get an interpolated value (meant for use by wrapper languages)
>  double GetSample(double x, double y, double z, int component);
>
>  // set the scalar mode (same as vtkMapper scalar modes)
>  void SetScalarMode(int mode);
>  void SetScalarModeToDefault();
>  void SetScalarModeToUsePointData();
>  void SetScalarModeToUseCellData();
>  void SetScalarModeToUsePointFieldData();
>  void SetScalarModeToUseCellFieldData();
>
>  // set the array, if chosen scalar mode is field data
>  void SetArrayName(const char *name);
>
>  void SetTolerance(double);
>  void SetLocator(vtkLocator *locator);
> };
>
> The changes are on gerrit, if people want to see the full implementation:
> http://review.source.kitware.com/2004
>
>  - David
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-- 
William J. Schroeder, PhD
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