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"Timo Poikola" <nomail@nomail> wrote in message
news:web.496116dc7e5264fe3332e10f0@news.povray.org...
> First of all, it will be nice if the RNG is able to generate true random
> numbers. I will be also happy if there is date() or time() or localtime()
> or
> something mechanism which returns a timestamp.
>
Generally a repeatable sequence of pseudo-random numbers is far more useful
in this type of graphics application than a non-repeatable pseudo-random
number sequence. If you want to further randomised the sequence, for example
to get a a different pseudo-random number stream in each frame of an
animation, you can use the frame_number as a seed.
If you want to get access to the time or date you can already use an ini
file option (e.g. Pre_Scene_Command or Pre_Frame_Command) to shell-out an
operating system command that writes a date/time stamp to a file in a
suitable format which you can then #read or #include from within your scene
file. Then, if you want to get a non-repeatable sequence of pseudo-random
numbers you could use some function of the time as your pseudo-random number
seed.
If none of these meets your need it would be helpful if you could explain
the particular situation where you believe a 'true' random number sequence
might be of use (if it were possible to implement :-)).
Regards,
Chris B.
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