add(.2, .2);
add(.5, Double.NaN);
add(.8, .8);
add(.9, .9);
add(1, Double.NaN);
CountingGraphics g = paint();
assertEquals(8, g.getPointCount());
LineChecker c = new LineChecker();
c.require(-1, 180, 19, 180);
c.require(19, 180, 39, 160);
c.require(39, 160, 99, 160);
c.require(99, 40, 159, 40);
c.require(159, 40, 179, 20);
c.require(179, 20, 199, 20);
c.check(g.getLines());
}