Given arguments such that ExactEdgeCircumcenterSign(x0, x1, a, b, c) == 0,
returns the value of Sign(X0, X1, Z) (where Z is the circumcenter of
triangle ABC) after symbolic perturbations are taken into account. The
result is zero only if X0 == X1, A == B, B == C, or C == A. (It is nonzero
if these pairs are exactly proportional to each other but not equal.)
Given arguments such that ExactEdgeCircumcenterSign(x0, x1, a, b, c) == 0, returns the value of Sign(X0, X1, Z) (where Z is the circumcenter of triangle ABC) after symbolic perturbations are taken into account. The result is zero only if X0 == X1, A == B, B == C, or C == A. (It is nonzero if these pairs are exactly proportional to each other but not equal.)