A function that is called with pairs of crossing edges. The function may
return false in order to request that the algorithm should be terminated,
i.e. no further crossings are needed.
"is_interior" indicates that the crossing is at a point interior to both
edges (i.e., not at a vertex). (The calling function already has this
information and it is moderately expensive to recompute.)
A function that is called with pairs of crossing edges. The function may return false in order to request that the algorithm should be terminated, i.e. no further crossings are needed.
"is_interior" indicates that the crossing is at a point interior to both edges (i.e., not at a vertex). (The calling function already has this information and it is moderately expensive to recompute.)