On Thu, Apr 11, 2019, 7:14 AM <fruityfr...@gmail.com> wrote: > Le lundi 18 mars 2019 17:27:16 UTC-4, Justin Israel a écrit : > > MVectorArray in python is a SWIG object wrapping the C++ type. I am not > sure of a way to pass a pointer to the C++ MVectorArray and 'wrap' it in > Python. But that would be the lowest overhead if it were possible since you > wouldn't need to copy. > > The hacky workaround is to serialize it to something like > /dev/shm/myvector.json and let python deserialize it. That incurs the cost > of having to encode/decode, but avoids the huge literal string call (I am > not sure of the cost differences here). > > > > > > I'm probably missing some other option to solve this. > > > > > > On Tue, Mar 19, 2019 at 6:26 AM <pety20...@gmail.com> wrote: > > hi, how i can read or how i can access to MVectorArray of C++ code by > python code? > > > > right now, i convert C++ MVectorArray to String and run it by > executePythonCommand() func > > > > > > > > ( MGlobal::executePythonCommand(c++MVectorArrayToString); ) > > > > > > > > but,i Want a faster way... > > > > > > > > i think, convert C++ MVectorArray to String, is not good way!(in big > arrays) > > > > > > > > -- > > > > You received this message because you are subscribed to the Google > Groups "Python Programming for Autodesk Maya" group. > > > > To unsubscribe from this group and stop receiving emails from it, send > an email to python_inside_maya+unsubscr...@googlegroups.com. > > > > To view this discussion on the web visit > https://groups.google.com/d/msgid/python_inside_maya/58b6b569-f8cf-418c-828b-7c6c1577c61c%40googlegroups.com > . > > > > For more options, visit https://groups.google.com/d/optout. > > If this array is the result of another function called in cpp, maybe you > can access it with ctypes and get the result in python. >
You could use ctypes but you would also need to write some C wrapper functions that can take void* and operate on the member functions and operators of the MVectorArray. Ctypes only uses C binary interface calling conventions. But the minimum functionality could be exposed such as a count(ptr) and a index(ptr, i) so that in ctypes you could for loop over the range of indices. If you want to get your cpp variable content on the fly, then I'd go for > Justin's solution (but first I'd try to double check there is no better > structure for what I want to achieve) > > -- > You received this message because you are subscribed to the Google Groups > "Python Programming for Autodesk Maya" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to python_inside_maya+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/python_inside_maya/c39ad963-8195-4956-b46b-f80e5bff3cfc%40googlegroups.com > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Python Programming for Autodesk Maya" group. To unsubscribe from this group and stop receiving emails from it, send an email to python_inside_maya+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/python_inside_maya/CAPGFgA3KN38wT8kUKPFFAH-481-ZOWLzggdYkX%2BnaMvzhMBBKw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
