10     double dy = cubic[index].fY - cubic[zero].fY;  in rotate()
18             rotPath[index].fY = cubic[zero].fY;  in rotate()
22             if (approximately_equal(cubic[side1].fY, cubic[zero].fY)) {  in rotate()
23                 rotPath[side1].fY = cubic[zero].fY;  in rotate()
25             if (approximately_equal(cubic[side2].fY, cubic[zero].fY)) {  in rotate()
26                 rotPath[side2].fY = cubic[zero].fY;  in rotate()
32         rotPath[index].fX = cubic[index].fX * dx + cubic[index].fY * dy;  in rotate()
33         rotPath[index].fY = cubic[index].fY * dx - cubic[index].fX * dy;  in rotate()
60         if (fPts[yMin].fY > fPts[index].fY || (fPts[yMin].fY == fPts[index].fY  in convexHull()
85             int sides = side(rotPath[side1].fY - rotPath[yMin].fY);  in convexHull()
86             sides ^= side(rotPath[side2].fY - rotPath[yMin].fY);  in convexHull()
141     int midSides = side(midPath[yMin].fY - midPath[least].fY);  in convexHull()
142     midSides ^= side(midPath[midX].fY - midPath[least].fY);  in convexHull()