@Test
public void interpolatesElevationOfPillarNodes() {
PointList pl1 = new PointList(3, true);
pl1.add(0, 0, 0);
pl1.add(0.0005, 0.0005, 100);
pl1.add(0.001, 0.001, 50);
GraphElevationSmoothing.smoothElevation(pl1);
assertEquals(3, pl1.size());
assertEquals(50, pl1.getElevation(1), .1);
PointList pl2 = new PointList(3, true);
pl2.add(0.001, 0.001, 50);
pl2.add(0.0015, 0.0015, 160);
pl2.add(0.0016, 0.0015, 150);
pl2.add(0.0017, 0.0015, 220);
pl2.add(0.002, 0.002, 20);
GraphElevationSmoothing.smoothElevation(pl2);
assertEquals(5, pl2.size());
assertEquals(120, pl2.getElevation(1), .1);
assertEquals(112, pl2.getElevation(2), .1);
assertEquals(50, pl2.getEle(0), .1);
}