private Vector TestProjectile(Projectile proj, double timeIncrement, int nSteps)
{
double oldTime = Time;
var positions = new List <Vector>();
var velocities = new List <Vector>();
int index = Projectiles.FindIndex((a) => a == proj);
foreach (var projectile in Projectiles)
{
positions.Add(projectile.Position);
velocities.Add(projectile.Velocity);
}
RunEngine(timeIncrement, nSteps);
Vector response = Projectiles[index].Position;
// Reset everything
for (int i = 0; i < Projectiles.Count; ++i)
{
Projectiles[i].Position = positions[i];
Projectiles[i].Velocity = velocities[i];
}
Time = oldTime;
return(response);
}
