public static void plotDirectedHalfPlane(FPoint2 p0, FPoint2 p1, int markType) {
double SEP = .4 * V.getScale();
double ang = MyMath.polarAngle(p0, p1);
FPoint2 d0 = MyMath.ptOnCircle(p0, ang + Math.PI / 2, SEP);
FPoint2 d1 = MyMath.ptOnCircle(p1, ang + Math.PI / 2, SEP);
EdSegment.plotDirectedLine(p0, p1);
V.pushStroke(STRK_RUBBERBAND);
V.drawLine(d0, d1);
V.popStroke();
if (markType >= 0) {
V.mark(d0, markType);
V.mark(d1, markType);
}
}
