// Must call Reset() before this in advance
public Cube4 GetCube4()
{
if (!Exist())
{
return(null);
}
double a = rd.NextDouble(), b = rd.NextDouble();
var c = rd.NextDouble() < CF ? Corner.odd[Array.FindIndex(OCPs, x => x > a * OCP)] :
Corner.even[Array.FindIndex(ECPs, x => x > a * ECP)];
var w = Wing.list[Array.FindIndex(WPs, x => x > b)];
var xc = XCenter.GetInstance(xcLimit);
return(new Cube4(c.GetInstance(), w.GetInstance(), xc));
}
