(The Eurographics Association, 2004) Ouchi, K.; Keyser, J.; Gershon Elber and Nicholas Patrikalakis and Pere Brunet
We present a method for dealing with degenerate situations in an exact boundary evaluation system. We describe the possible degeneracies that can arise and how to detect them. We then present a numeric perturbation method that is simpler to implement within a complex system than symbolic perturbation methods.