[TRNSYS-users] C++ Type in TRNSYS solving Differential equations

[Yuichi Yasuda via TRNSYS-users]

Patix,

I wonder that the TRNSYS developer group does not provide perfect 
TRNSYS.H. Why??
Anyway, I think that all arguments must be declared as a pointer, unless 
they are declared as a Value in FORTRAN.
Try the following declaration.

extern "C" __declspec(dllimport) void _cdecl SOLVEDIFFEQ(double* aa, 
double* bb, double* INIT_VALUE, double* END_VALUE, double* AVG_VALUE);

I have posted some articles for C++ component on my blog. Please check 
these articles if you like.
Unfortunately, these are written in Japanese. Try to read them with 
Google translation tool.
https://kankyoukei.blogspot.jp/2016/04/trnsyscc6.html
https://kankyoukei.blogspot.jp/2016/04/trnsys-cc7.html

Regards,
Yuichi Yasuda

On 2016/12/20 20:36, Patxi Sorbet Presentacion via TRNSYS-users wrote:
>
> Hello Everyone,
>
> I’m, currently dealing with the development of a new type, but not in 
> the Fortran-based official way.
>
> Up to now, I have developed several Types in C++ using information 
> from templates that come included in the program folders, and some 
> imagination.
>
> For the moment, things went well this way.
>
> But now I want to solve a differential equation calling the built-in 
> routine SolveDiffEq(AA, BB, TI, TF, TBAR).
>
> I may develop my own Finite difference scheme and go on, but I’m 
> trying to take advantage from that kernel subroutine.
>
> For the moment I have not found the right way (if it exists) to 
> include the routine header in Trnsys.h, for later compiling and 
> running in the generated dll. I guess It should be this way, but it 
> doesn’t’t work when running trnexe.
>
> extern"C"__declspec(dllimport) void_cdeclSOLVEDIFFEQ(doubleaa, 
> doublebb, double* INIT_VALUE, double* END_VALUE, double* AVG_VALUE);
>
> If anyone has the same concerns, we may interchange information about 
> how creating & compiling Types this way, without purchasing an IVF 
> license. I will be very pleased to share my work.
>
> Thanks in advance
>
> Regards,
>
> ----------------------------------------------------------------------
>
> Patxi Sorbet
>
> Research Engineer
>
> Solar Thermal Energy Department
>
> NATIONAL RENEWABLE ENERGY CENTRE
>
> Ciudad de la Innovación, 7 -31621         - Sarriguren (Navarra) Spain
>
> www.cener.com
>
>
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at lists.onebuilding.org
> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org


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