[luatex] tex.setrandomseed primitive missing in Lua

[Henri Menke]

On 10/01/19 1:47 PM, Henri Menke wrote:
> On 10/01/19 1:16 PM, Hans Hagen wrote:
>> On 1/10/2019 12:15 AM, Henri Menke wrote:
>>> On 10/01/19 11:50 AM, Henri Menke wrote:
>>>> Dear list,
>>>>
>>>> To set the random seed of the MP random number generator I have to use
>>>> the TeX command \setrandomseed.  I can't do it from the Lua level,
>>>> because tex.randomseed is read-only and tex.setrandomseed is nil.
>>>> Could you please expose this primitive in Lua?
>>>
>>> I tried to work around this using
>>>
>>> \directlua{
>>>    token.create("setrandomseed")
>>>    token.create(string.byte("1"))
>>>    token.expand()
>>>    print(tex.randomseed)
>>> }
>>>
>>> but I only get ! Undefined control sequence.
>> tex.print("\\setrandomseed ....")
> 
> That doesn't work because it is asynchronous.
> 
> \directlua{
>   tex.print("\noexpand\\setrandomseed1")
>   print(tex.randomseed)
> }

I realised that the same random number generator is accessible via

tex.init_rand
tex.uniform_rand
tex.normal_rand

So I'll just use this instead.

> 
> will print whatever the random seed was initialized with but not 1.
> 
>>
>>
>> -----------------------------------------------------------------
>>                                           Hans Hagen | PRAGMA ADE
>>               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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>