/// <summary>
/// Sets a request to move the lifelet with the given velocity.
/// </summary>
protected void move(Vector v)
{
// Put a cap on vel
double n = v.Norm();
if(n > Config.LifeletMaximumVelocityRequest) {
v = v.Normalize() * Config.LifeletMaximumVelocityRequest;
}
// Update requested velocity for next simulate
_velReq = v;
}