Method GetColor

Rendering/Core/vtkColorTransferFunction.cxx:727–748

------------------------------------------------------------------------------ Returns the RGB color evaluated at the specified location

//------------------------------------------------------------------------------
// Returns the RGB color evaluated at the specified location
void vtkColorTransferFunction::GetColor(double x, double rgb[3])
{
  if (this->IndexedLookup)
  {
    int numNodes = this->GetSize();
    vtkVariant xv(x);
    vtkIdType idx = this->GetAnnotatedValueIndexInternal(xv);
    if (idx < 0 || numNodes == 0)
    {
      this->GetNanColor(rgb);
    }
    else
    {
      double nodeVal[6];
      this->GetNodeValue(idx % numNodes, nodeVal);
      for (int i = 0; i < 3; ++i)
        rgb[i] = nodeVal[i + 1];
    }
    return;
  }
  this->GetTable(x, x, 1, rgb);
}

//------------------------------------------------------------------------------
// Returns the red color evaluated at the specified location