public final boolean rightOf(QuadEdge e) { return isCCW(e.dest(), e.orig()); }
public final boolean leftOf(QuadEdge e) { return isCCW(e.orig(), e.dest()); }
public final boolean rightOf(QuadEdge e) { return isCCW(e.dest(), e.orig()); }
public final boolean leftOf(QuadEdge e) { return isCCW(e.orig(), e.dest()); }