How to expose an object function done in C++

Helper

On 29/07/2016 at 02:37, xxxxxxxx wrote:

Originally posted by xxxxxxxx

OK, I got the passing a BaseList as a prameter with the "G" format, but suppose I want to pass both a BaseList and an interger or real in the same function? How would that be formatted?

Like the argument parsing in the function example extendpyapi_PassParameters() I posted above, concatenate the characters for each parameter.
For instance:

GeData data;
Int32 integer = 0;
Float real = 0.0f;
  
const Char *kwlist[] = {"baselist", "integer", "real", nullptr};
if (!pylib.ParseTupleAndKeywords(args, keywords, "Gif", kwlist, &data, &integer, &real))
    return nullptr;

Helper

On 29/07/2016 at 04:53, xxxxxxxx wrote:

Howdy,

DOH! It's the strings that always throw me off when they're used for anything other than printing.
But I get it now:
"$" = string format
"i" = integer format
"f" = float format
"G" = GeData format

Possibly if the example had the float first like "$fi" then I might have been able to figure that out. But, with it the other way around, no matter how many times I looked at it, I still saw the word "if", and got confused.

Thanks for the clarification.

Adios,
Cactus Dan

Helper

On 29/07/2016 at 05:53, xxxxxxxx wrote:

You're welcome

"C" can also be used to parse BaseContainer* too (note only pointer to BaseContainer, initialize with nullptr before calling ParseTupleAndKeywords()).

Helper

On 29/07/2016 at 06:07, xxxxxxxx wrote:

Howdy,

Thanks. Is there a complete list of formatting letters that you could post?

Also, is there a way to add global symbols in python like in coffee, and if so, can you post an example?

Adios,
Cactus Dan

Helper

On 26/04/2017 at 00:05, xxxxxxxx wrote:

Hello,

I know this is a bit older topic but the last question from Cactus Dan was not answered and I also need it. Especially I need to transfer BaseObject to and from python script.

So again, we just need a table of all formatting letters and types that Cinema python binding API uses.

Just for completeness, python build-in formatting letters seems to work and are available here: https://docs.python.org/2.7/c-api/arg.html?highlight=parsetupleandkeywords#c.PyArg_ParseTupleAndKeywords

Helper

On 26/04/2017 at 02:38, xxxxxxxx wrote:

Hi Miro,

Originally posted by xxxxxxxx

I know this is a bit older topic but the last question from Cactus Dan was not answered and I also need it. Especially I need to transfer BaseObject to and from python script.

To parse a BaseList based object, use 'G' format character as show in my above code snippet's function extendpyapi_PassBaseList(). The object can be casted to the most interesting type after retrieving it.

Originally posted by xxxxxxxx

So again, we just need a table of all formatting letters and types that Cinema python binding API uses.

PythonLibrary::ParseTupleAndKeywords() accepts the following format characters for Cinema 4D C++ API classes:
- $: String
- %: Filename
- M: Matrix
- V: Vector
- Q: Quaternion
- BaseContainer*
- G: GeData (versatile: can parse a BaseList, a custom data, a time, etc.)
- T: BaseTime
- X: BaseThread

Originally posted by xxxxxxxx

Just for completeness, python build-in formatting letters seems to work and are available here: https://docs.python.org/2.7/c-api/arg.html?highlight=parsetupleandkeywords#c.PyArg_ParseTupleAndKeywords

PythonLibrary::ParseTupleAndKeywords()also accepts the following standard format characters: b, B, j, h, i, I, v, l, L, r, f, d, c

Helper

On 27/04/2017 at 23:34, xxxxxxxx wrote:

That's perfect! Thank you.

Helper

On 24/09/2017 at 13:07, xxxxxxxx wrote:

Hello all,

It seems to be that i's only possible to make a python extension library as a plugin. Which plugin then is best suited? A command plugin, I would guess, or is there another plugin that loads completely automatic at startup?

I need something that is always available, so that I don't have to think about loading the library. Much like the c++ example here: page_creating_libraries.html

Regards,

Hermen

Helper

On 25/09/2017 at 01:29, xxxxxxxx wrote:

Hello,

a "_ plugin_" is just a custom module loaded by Cinema. So a "plugin" does not need to include anything e.g. a command data extension. You only have to implement PluginStart()/PluginMessage()/PluginEnd(), see Plugin Functions Manual. In such a PluginMessage () function you have to register your Python extension as shown above.

best wishes,
Sebastian

Helper

On 25/09/2017 at 02:53, xxxxxxxx wrote:

Aha!
Now I understand, thanks for clearing that up!

regards,

Hermen