Thank to Hans and Peter too.
It works in context fine now. I would like realize this same in pure LuaTeX.
I was primarily in the query for it to find Lua equivalent of TeX
primitives \newdimen and \newcount (for direct creating new TeX registers)
I could use something like "\directlua{tex.newdimen.mydimen}" that would
create TeX register "mydimen" and then
\directlua{tex.dimen.mydimen=200*2^16} which set value of register and
that should be present in TeX for direct use such as "\the\mydimen" etc.
I apologize for my naivete :-).
Of course, I did not think that the global variable is magically changed
the registry value, I just did not know how to implement it.
Plus, I had in mind that ConTeXt conversion functions do not work in a
clean LuaTEX (without reading about some library functions).
One more thanx.
Jaroslav
Here is my pure luatex example. Is there any easy way?
\newdimen\mytexdimension
\mytexdimension 100pt
mytexdimension: .\hbox to\mytexdimension{\the\mytexdimension}.
\directlua{tex.myluadimension = "200pt"}
myluadimension: .\hbox to
\directlua{tex.print(tex.myluadimension)}{\directlua{tex.print(tex.myluadimension)}}.
\directlua{tex.dimen.mytexdimension = "300pt"}
mytexdimension: .\hbox to\mytexdimension{\the\mytexdimension}.
\def\myluadimension{\directlua{tex.print(tex.myluadimension)}}
myluadimension: .\hbox to\myluadimension{\myluadimension}.
\bye
Dne 22.8.2012 12:32, Hans Hagen napsal(a):
On 22-8-2012 11:09, Jaroslav Hajtmar wrote:
Thanks Wolfgang for the reply,
but I must have misunderstood. My point is, that TeX registers was
subsequently visible and usable in TeX (eg for width or height of boxes,
etc.)
Eg. for example, \the\mydimension can see that this does not occur!
In addition, I solve the problem at LuaTEX, so ConTeXt converting
functions do not work etc. ..
Thanx Jaroslav
Here is another example:
\starttext
\newdimen\mytexdimension
\mytexdimension=100pt
\ctxlua{myluadimension = number.topoints(10000)}
\ctxlua{context(myluadimension)}
\the\mytexdimension
\hbox to\mytexdimension{XXXXX}YYYY
% FAILS
%\the\myluadimension
%\hbox to\myluadimension{XXXXX}YYYY
Of course that fails: why should the globally defined
lua variable "myluadimension" magically become a \dimen
register at the tex end? And believe it or not, the context
conversion function do work, else mkiv wouldn't work.
\stoptext
Here is the right code:
\starttext
\newdimen\mytexdimension \mytexdimension 100pt
\ruledhbox to\mytexdimension{\the\mytexdimension}
\ctxlua{document.myluadimension = "200pt"}
\ruledhbox to
\cldcontext{document.myluadimension}{\cldcontext{document.myluadimension}}
\ctxlua{tex.dimen.mytexdimension = "300pt"}
\ruledhbox to\mytexdimension{\the\mytexdimension}
\stoptext
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