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);
}
}
private static void renderHull(PtEntry pt) {
Inf inf = Inf.create();
int count = 30;
PtEntry ptStart = pt;
do {
inf.update();
if (pt.prev(true) != null) {
boolean valley = false;
valley =
(pt.prev(true).source() == pt.source() && pt.prev(true).orig().next(true) != pt.orig());
V.pushColor(MyColor.cBLUE);
V.pushStroke(valley ? STRK_RUBBERBAND : STRK_THICK);
V.drawLine(pt.prev(true), pt);
V.pop(2);
}
V.pushColor(MyColor.cDARKGREEN);
V.mark(pt, MARK_DISC, .6);
V.pop();
if (Editor.withLabels(true)) {
StringBuilder sb = new StringBuilder();
sb.append(" #" + pt.id());
if (pt.source() != null) sb.append(" <" + pt.source() + ">");
V.pushScale(.6);
V.draw(sb.toString(), MyMath.ptOnCircle(pt, MyMath.radians(30), 3), TX_FRAME | TX_BGND);
V.pop();
}
pt = pt.next(true);
if (count-- == 0) V.draw("too many points rendering!", 50, 50, TX_CLAMP);
} while (pt != ptStart && count > 0);
}
private static String tr(FPoint2 rayStart, double theta) {
return tl(rayStart, MyMath.ptOnCircle(rayStart, theta, 20));
}