[vtkusers] intersection of line with bounding-box

[Oliver Weinheimer]

Hi all,

i have imported data from an C++-array.
What is the best way for calculating the intersection points of a line
with the bounding-box of the imported volume. At the moment i'm using
the class vtkCellLocator, see the code below  - i think, there must be a
better way ....
    
regards
Oliver

---

unsigned long int size = rows*cols*slices;
volumeValues = new float[size];
...
importer = vtkImageImport::New();
importer->SetWholeExtent(0,cols-1,0,rows-1,0,slices-1);
importer->SetDataSpacing (volume_res,volume_res,volume_res);
importer->SetDataExtentToWholeExtent();
importer->SetDataOrigin(volume_origin[0],
                          volume_origin[1],
                          volume_origin[2]);
importer->SetDataScalarTypeToFloat();
importer->SetImportVoidPointer(volumeValues);
...
cellLocator = vtkCellLocator::New();
cellLocator->SetDataSet((vtkDataSet*)importer->GetOutput());
cellLocator->CacheCellBoundsOn();
cellLocator->SetTolerance(0.0);
cellLocator->AutomaticOn();
cellLocator->BuildLocator();
...
cellLocator->IntersectWithLine(...)

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