public IEnumerable <IGenerationInstruction> Generate(IList <Id <Player> > playerIds)
{
var idMan = new IdManager();
var sun = idMan.GetNext <IBody>();
yield return(new NewFixedBodyInstruction(sun, new Position2(), Radius.FromValue(1), 1));
var orbitRadius = 7.U();
var orbitStep = 4.U();
foreach (var pId in playerIds)
{
var planet = idMan.GetNext <IBody>();
yield return(new NewOrbitingBodyInstruction(planet, sun,
Radius.FromValue(orbitRadius), Direction2.Zero, Radius.FromValue(0.5f), 0.25f, 100));
yield return(new AssignPlayerToBodyInstruction(pId, planet));
orbitRadius += orbitStep;
}
}