public void TestGravityForce()
{
var earth = new Navigation.lib.GravitationSource(
5.98E24,
6.38E6,
new Vector3(0, 0, 0),
new Vector3(0, 0, 0)
);
var me = new Navigation.lib.GravitationSource(
68,
2,
new Vector3(0, 6.38E6, 0),
new Vector3(0, 0, 0)
);
Assert.IsTrue(Math.Abs(earth.ForceTo(me) - 666.0) < 1);
}
public void TestAccelerationTo()
{
var earth = new Navigation.lib.GravitationSource(
5.98E24,
6.38E6,
new Vector3(0, 0, 0),
new Vector3(0, 0, 0)
);
var me = new Navigation.lib.GravitationSource(
68,
2,
new Vector3(0, 6.38E6, 0),
new Vector3(0, 0, 0)
);
Assert.IsTrue(Math.Abs(me.AccelerationTo(earth) - 9.80) < 0.01);
Assert.IsTrue(earth.AccelerationTo(me) < 0.00001);
}
public void TestGravityDrop()
{
var earth = new Navigation.lib.GravitationSource(
5.9722E24,
6357000,
new Vector3(0, 0, 0),
new Vector3(0, 0, 0)
);
var height = new Vector3(0, 6357000 + 54, 0);
var book = new Navigation.lib.GravitationSource(
1,
0.05,
height,
new Vector3()
);
var start = new TimeSpan(0);
while (true)
{
var next = start + TimeSpan.FromSeconds(0.01);
var deltaTime = next - start;
book.AccelerateTo(earth, deltaTime);
book.Update(deltaTime);
if (book.IsCollidingWith(earth))
{
break;
}
start = next;
if (start.TotalDays >= 365.2564)
{
break;
}
}
Assert.AreEqual(3.31, start.TotalSeconds);
}
public void TestSolSystem()
{
var sol = new Navigation.lib.GravitationSource(
1.989E+030,
695000000,
new Vector3(1, 1, 1),
new Vector3(0, 0, 0)
);
var earth = new Navigation.lib.GravitationSource(
5.976E+024,
6378140,
new Vector3(150000000000, 0, 0),
new Vector3(0, 0, 29800)
);
var start = new TimeSpan(0);
while (true)
{
var next = start + TimeSpan.FromHours(1);
var deltaTime = next - start;
earth.AccelerateTo(sol, deltaTime);
sol.AccelerateTo(earth, deltaTime);
earth.Update(deltaTime);
sol.Update(deltaTime);
start = next;
if (start.TotalDays >= 370)
{
break;
}
}
Assert.AreEqual(true, earth.Position.Distance(new Vector3(150000000000, 0, 0)) < 3015200000);
}
