Coefficients wrong for vtkKochanekSpline for 2 point special case
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
vtkKochanekspline::Fit1D sets the second coefficient for the 2 point specialization incorrectly.
If the interval is anything other than 0->1, then the interpolation will be incorrect.
Correct value is coefficients = (y - y);
Not coefficients = (y - y) / (x - x);
This is line 228 of vtkKochanekSpline.cxx