Method GetRGBTransferFunction

Rendering/Core/vtkVolumeProperty.cxx:363–380

------------------------------------------------------------------------------ Get the currently set RGB transfer function. Create one if none set.

//------------------------------------------------------------------------------
// Get the currently set RGB transfer function. Create one if none set.
vtkColorTransferFunction* vtkVolumeProperty::GetRGBTransferFunction(int index)
{
  if (this->RGBTransferFunction[index] == nullptr)
  {
    this->RGBTransferFunction[index] = vtkColorTransferFunction::New();
    this->RGBTransferFunction[index]->Register(this);
    this->RGBTransferFunction[index]->Delete();
    this->RGBTransferFunction[index]->AddRGBPoint(0, 0.0, 0.0, 0.0);
    this->RGBTransferFunction[index]->AddRGBPoint(1024, 1.0, 1.0, 1.0);
    if (this->ColorChannels[index] != 3)
    {
      this->ColorChannels[index] = 3;
    }
    this->Modified();
  }

  return this->RGBTransferFunction[index];
}

//------------------------------------------------------------------------------
// Set the scalar opacity of a volume to a transfer function