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); } }