static void Main(string[] args)
{
var b = new Moon()
{
Position = new P3(17, -7, -11)
};
var c = new Moon()
{
Position = new P3(1, 4, -1)
};
var a = new Moon()
{
Position = new P3(6, -2, -6)
};
var d = new Moon()
{
Position = new P3(19, 11, 9)
};
var system = new MoonSystem(new[] { a, b, c, d });
system.Turn(1000);
Console.WriteLine($"Part 1:{system.Energy}");
system.Reset();
var sw = Stopwatch.StartNew();
var cycle = system.CalculateCycle();
sw.Stop();
Console.WriteLine($"Part 2:{cycle} in {sw.ElapsedMilliseconds}ms");
}
public void Part1_Example1()
{
var a = new Moon()
{
Position = new P3(-1, 0, 2)
};
var b = new Moon()
{
Position = new P3(2, -10, -7)
};
var c = new Moon()
{
Position = new P3(4, -8, 8)
};
var d = new Moon()
{
Position = new P3(3, 5, -1)
};
var system = new MoonSystem(a, b, c, d);
system.Turn(1);
// Positions after 1 step:
Assert.Equal(new P3(2, -1, 1), system[0].Position);
Assert.Equal(new P3(3, -7, -4), system[1].Position);
Assert.Equal(new P3(1, -7, 5), system[2].Position);
Assert.Equal(new P3(2, 2, 0), system[3].Position);
// Velocities after 1 step:
Assert.Equal(new P3(3, -1, -1), system[0].Velocity);
Assert.Equal(new P3(1, 3, 3), system[1].Velocity);
Assert.Equal(new P3(-3, 1, -3), system[2].Velocity);
Assert.Equal(new P3(-1, -3, 1), system[3].Velocity);
}
public void Part1_Example2()
{
var b = new Moon()
{
Position = new P3(-8, -10, 0)
};
var c = new Moon()
{
Position = new P3(5, 5, 10)
};
var a = new Moon()
{
Position = new P3(2, -7, 3)
};
var d = new Moon()
{
Position = new P3(9, -8, -3)
};
var system = new MoonSystem(new [] { a, b, c, d });
system.Turn(100);
Assert.Equal(1940, system.Energy);
}
public void Part2_Example1()
{
var a = new Moon()
{
Position = new P3(-1, 0, 2)
};
var b = new Moon()
{
Position = new P3(2, -10, -7)
};
var c = new Moon()
{
Position = new P3(4, -8, 8)
};
var d = new Moon()
{
Position = new P3(3, 5, -1)
};
var system = new MoonSystem(a, b, c, d);
var cycle = system.CalculateCycle();
Assert.Equal(2772L, cycle);
}
public void Part2_Example2()
{
var b = new Moon()
{
Position = new P3(-8, -10, 0)
};
var c = new Moon()
{
Position = new P3(5, 5, 10)
};
var a = new Moon()
{
Position = new P3(2, -7, 3)
};
var d = new Moon()
{
Position = new P3(9, -8, -3)
};
var system = new MoonSystem(a, b, c, d);
var cycle = system.CalculateCycle();
Assert.Equal(4686774924L, cycle);
}