// For consistency, angles returned are always within (-180, 180].
// Maybe counterintuitive if inputs were > 180, so this test is here to highlight this behaviour.
public void MeanAngleWithin180OfZero()
{
List <float> rotations = new List <float>();
rotations.Add(270);
rotations.Add(270);
float avgRotation = (float)AverageHeadingAlignmentStrategy.meanAngle(rotations);
Assert.AreEqual(-90, avgRotation, _tolerance);
}
public void MeanAngleOver360Negative()
{
List <float> rotations = new List <float>();
rotations.Add(-10);
rotations.Add(10);
float avgRotation = (float)AverageHeadingAlignmentStrategy.meanAngle(rotations);
Assert.AreEqual(0, avgRotation, _tolerance);
}
public void MeanAngleSameAngleDifferentForms()
{
List <float> rotations = new List <float>();
rotations.Add(270);
rotations.Add(-90);
rotations.Add(360 + 270);
float avgRotation = (float)AverageHeadingAlignmentStrategy.meanAngle(rotations);
Assert.AreEqual(-90, avgRotation, _tolerance);
}
public void MeanAnglePositiveAndNegative()
{
List <float> rotations = new List <float>();
rotations.Add(-80);
rotations.Add(80);
rotations.Add(179);
rotations.Add(-179);
float avgRotation = (float)AverageHeadingAlignmentStrategy.meanAngle(rotations);
Assert.AreEqual(180, avgRotation, _tolerance);
}
//Test to check we avoid the common (wrong) "solution": (sum(angles)%360) / count(angles)
public void MeanAngleFiveNinetys()
{
List <float> rotations = new List <float>();
rotations.Add(90);
rotations.Add(90);
rotations.Add(90);
rotations.Add(90);
rotations.Add(90);
float avgRotation = (float)AverageHeadingAlignmentStrategy.meanAngle(rotations);
Assert.AreEqual(90, avgRotation, _tolerance);
}