public void TestOrbitPositionsOnRotation()
{
Time.Reset();
var center = new FixedLocation(100, 100);
var orbit = new OrbitLocation(center, new FixedLocation(200, 100), halfPI);
Assert.AreEqual(200, orbit.X);
Assert.AreEqual(100, orbit.Y);
Time.Increment();
Assert.AreEqual(100, orbit.X);
Assert.AreEqual(0, orbit.Y);
Time.Increment();
Assert.AreEqual(0, orbit.X);
Assert.AreEqual(100, orbit.Y);
Time.Increment();
Assert.AreEqual(100, orbit.X);
Assert.AreEqual(200, orbit.Y);
}
public void TestEqualDistanceOnSameRotation()
{
Time.Reset();
var center = FixedLocation.Zero;
var rotation = halfPI / 100.0d;
var orbit1 = new OrbitLocation(center, new FixedLocation(200000, 200000), rotation);
var orbit2 = new OrbitLocation(center, new FixedLocation(-500000, 1000000), rotation);
var distance = Distance.Calculate(orbit1, orbit2);
for (int n = 0; n < 400; n++)
{
Time.Increment();
var difference = Math.Abs(distance - Distance.Calculate(orbit1, orbit2));
Assert.LessOrEqual(difference, 10.0d);
}
}
