Method UpdateTransferFunctions

Rendering/VolumeOpenGL2/vtkVolumeInputHelper.cxx:57–97

}

void vtkVolumeInputHelper::UpdateTransferFunctions(
  vtkRenderer* ren, int blendMode, float samplingDist)
{
  auto vol = this->Volume;
  const int transferMode = vol->GetProperty()->GetTransferFunctionMode();
  const int numComp = this->Texture->GetLoadedScalars()->GetNumberOfComponents();
  switch (transferMode)
  {
    case vtkVolumeProperty::TF_1D:
      switch (this->ComponentMode)
      {
        case vtkVolumeInputHelper::INDEPENDENT:
          for (int i = 0; i < numComp; ++i)
          {
            this->UpdateOpacityTransferFunction(ren, vol, i, blendMode, samplingDist);
            this->UpdateGradientOpacityTransferFunction(ren, vol, i, samplingDist);
            this->UpdateColorTransferFunction(ren, vol, i);
          }
          break;
        default: // RGBA or LA
          this->UpdateOpacityTransferFunction(ren, vol, numComp - 1, blendMode, samplingDist);
          this->UpdateGradientOpacityTransferFunction(ren, vol, numComp - 1, samplingDist);
          this->UpdateColorTransferFunction(ren, vol, 0);
      }
      break;

    case vtkVolumeProperty::TF_2D:
      switch (this->ComponentMode)
      {
        case vtkVolumeInputHelper::INDEPENDENT:
          for (int i = 0; i < numComp; ++i)
          {
            this->UpdateTransferFunction2D(ren, i);
          }
          break;
        default: // RGBA or LA
          this->UpdateTransferFunction2D(ren, 0);
      }
      break;
  }
}

int vtkVolumeInputHelper::UpdateOpacityTransferFunction(
  vtkRenderer* ren, vtkVolume* vol, unsigned int component, int blendMode, float samplingDist)