Method InternalRequestUpdateExtent

Imaging/General/vtkImageGaussianSmooth.cxx:99–113

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//------------------------------------------------------------------------------
void vtkImageGaussianSmooth::InternalRequestUpdateExtent(int* inExt, int* wholeExtent)
{
  int idx, radius;

  // Expand filtered axes
  for (idx = 0; idx < this->Dimensionality; ++idx)
  {
    radius = static_cast<int>(this->StandardDeviations[idx] * this->RadiusFactors[idx]);
    inExt[idx * 2] -= radius;
    inExt[idx * 2] = std::max(inExt[idx * 2], wholeExtent[idx * 2]);

    inExt[idx * 2 + 1] += radius;
    inExt[idx * 2 + 1] = std::min(inExt[idx * 2 + 1], wholeExtent[idx * 2 + 1]);
  }
}

//------------------------------------------------------------------------------
// For a given position along the convolution axis, this method loops over