Which is the purpose of the _GAME macro?

[nicola907]

Hi everyone.
I have generated the C code of my model using the following command:

`sde build mymodel.mdl --spec mymodel.json`

Then I have noticed that in the generated "vensim.h" file there is a macro defined like this:

`#define _GAME(x) (x)`

It simply returns the value that I pass to it. The problem is that in the generated "mymodel.c" file, more specifically the "evalAux0" function, this macro is used like this:

`_myvariable = _GAME(0.0);`

It sets "myvariable" to the value 0.0. The problem is that I don't want it to be always 0.0 because it's one of my inputs and the user must be able to give other values.

[chrispcampbell]

Hi @nicola907, apologies for the long overdue reply. I wanted to let you know that just this month we finished implementing full support for the Vensim GAME function and gaming mode in general in SDEverywhere.

Back when you wrote this message last year, SDEverywhere did not have full support for the GAME function, and the documentation noted that it was implemented as a no-op, meaning that it would only return the input (x) value. But now that we've implemented full support for the GAME function, it is now possible to supply user-provided gaming inputs to the model at runtime.

More details are available in the August 2024 Updates announcement. Hope this is useful to you and others who have been requesting gaming support in SDEverywhere.