[Jsbsim-matlab] compiling mex file for S-Function

[Roberts, D. J. <dro...@mi...>]

Brian,

Stuart pointed me towards your mathworks submission.  I tried your sfuntest3.mdl and it works nicely.  I'm interested in making use of it.

I noticed it is slower than JSBSim.  I think this is probably due to use of the GetPropertyValue() method at 120hz.  From looking at JSBSim source I notice that comments suggest using the GetNode() function and then using the node's getDoubleValue() function for calls at 120hz.

I'm going to try to modify JSBSimInterface.cpp &  JSBSimInterface.h to incorporate this.   Do you have the mex statement that you used to compile JSBSim_SFunction.mexw32?

I tried with the following statement:

mex -g JSBSim_SFunction.cpp JSBSimInterface.cpp MexJSBSim.cpp SfunInterface.cpp stdafx.cpp  -I"..\JSBSim\src\" -L"..\JSBSim\lib\"

When I do this I get an error concerning MexJSBSim.cpp at line 111.  The compiler spits out: 'JSBSimInterface::Open' : cannot convert parameter 1 from 'const mxArray *' to 'std::string'.

Is there a compile option that I'm forgetting that handles data type conversions?

Regards,

David Roberts