/// <summary>
/// creates an asteroid that will collide with the given entity on the given date.
/// </summary>
/// <param name="starSys"></param>
/// <param name="target"></param>
/// <param name="collisionDate"></param>
/// <returns></returns>
public static Entity CreateAsteroid(StarSystem starSys, Entity target, DateTime collisionDate, double asteroidMass = -1.0)
{
//todo rand these a bit.
double radius = Distance.KmToAU(0.5);
double mass;
if (asteroidMass == -1.0)
{
mass = 1.5e+12; //about 1.5 billion tonne
}
else
{
mass = asteroidMass;
}
Vector4 velocity = new Vector4(8, 7, 0, 0);
var position = new PositionDB(0, 0, 0, Guid.Empty);
var massVolume = MassVolumeDB.NewFromMassAndRadius(mass, radius);
var planetInfo = new SystemBodyInfoDB();
var balisticTraj = new NewtonBalisticDB(target.Guid, collisionDate);
var name = new NameDB("Ellie");
var AsteroidDmg = new AsteroidDamageDB();
var sensorPfil = new SensorProfileDB();
planetInfo.SupportsPopulations = false;
planetInfo.BodyType = BodyType.Asteroid;
Vector4 targetPos = OrbitProcessor.GetAbsolutePosition(target.GetDataBlob <OrbitDB>(), collisionDate);
TimeSpan timeToCollision = collisionDate - starSys.Game.CurrentDateTime;
Vector4 offset = velocity * timeToCollision.TotalSeconds;
targetPos -= Distance.KmToAU(offset);
position.AbsolutePosition = targetPos;
position.SystemGuid = starSys.Guid;
balisticTraj.CurrentSpeed = velocity;
var planetDBs = new List <BaseDataBlob>
{
position,
massVolume,
planetInfo,
name,
balisticTraj,
AsteroidDmg,
sensorPfil
};
Entity newELE = new Entity(starSys, planetDBs);
return(newELE);
}
