GetPointInAt
fPath->GetPointInAt(index, nextIn);
fPath->GetPointInAt(fIndex + 1, fNextIn);
|| !fPath->GetPointInAt(fIndex + 1, fNextIn))) {
fPath->GetPointInAt(fIndex, fPointIn);
fPath->GetPointInAt(fIndex, fNextIn);
bool GetPointInAt(int32 index, BPoint& point) const;