How to pass structures into re-integrated autogenerated C++ code in Matlab

Hello,

I am trying to test some code that has been generated from Matlab into C++.

To do this I am attempting to integrate and run the generated C++ code back into Matlab.

Here's the function I am trying to use (in Matlab pre-autogen)

function out = getRotationMatrix(aStruct)

out = aStruct.bank_rad*aStruct.heading_rad+aStruct.pitch_rad;

end

I autogenerate it using this ... (Note the setting of CppInterfaceStyle to 'Methods')

function varargout = AutoGenCode(varargin)
% Here we are attempting to generate a C++ class from a matlab function via a
% hosting function

% initialise
varargout = {};

% create instance of  config object
cfg = coder.config('LIB');
% config options
cfg.MaxIdLength                  = int32(64);
cfg.TargetLang                   = 'C++';
cfg.CppPreserveClasses           = 1;
cfg.EnableCustomReplacementTypes = true;
cfg.ReplacementTypes.uint32      = 'uint32_t';
cfg.CppInterfaceStyle            = 'Methods';
cfg.CppInterfaceClassName        = 'FrameTransformation';
cfg.FilePartitionMethod          = 'MapMFileToCFile'; % or 'MapMFileToCFile' SingleFile
cfg.EnableVariableSizing         = false;
%cfg.PreserveVariableNames        = 'UserNames'; % Worse
%cfg.IncludeInitializeFcn         = true;
cfg.PassStructByReference        = true;

thisStruct.bank_rad = 2.1;
thisStruct.heading_rad = 3.1;
thisStruct.pitch_rad = 3.1;

codegen -config cfg getRotationMatrix -args {thisStruct} -report -preservearraydims -std:c++11

To move to another area (\unzipped) I use packNGo

load([pwd,'\codegen\lib\FrameTransformation\buildInfo.mat'])

packNGo(buildInfo,'packType', 'hierarchical','fileName','portzingbit')

Now when i try to re-integrate it i am using clib

cd 'D:\thoros\Components\Frame Transformation Service\FT_V2\unzippedCode'
clibgen.generateLibraryDefinition('FrameTransformation.h','Libraries',{'getRotationMatrix.lib'})
build(defineFrameTransformation)
addpath('D:\thoros\Components\Frame Transformation Service\FT_V2\unzippedCode\FrameTransformation')

Where I had to define the < SHAPE > parameter in the defineFrameTransformation.mlx manually to be 1

When i try and use the function I cant pass a structure without an error

A = clib.FrameTransformation.FrameTransformation()
thisStruct.bank_rad = 2.1;
thisStruct.heading_rad = 3.1;
thisStruct.pitch_rad = 3.1;
>> A.getRotationMatrix(thisStruct)

I get the following error

Unrecognized method, property, or field 'getRotationMatrix' for class 'clib.FrameTransformation.FrameTransformation'.

If i try and create a type as per the 'Functions' example below

A = clib.getRotationMatrix.struct0_T

I get the error

>> Unable to resolve the name clib.getRotationMatrix.struct0_T.

The problem disappears if rewrite and regenerate the function to accept non-structure input e.g. double.

By using the summary function i can see that the call to getRotationMatrix should be of type clib.FrameTransformation.struct0_T

However i can't seem to create a variable of this type.

summary(defineFrameTransformation)

MATLAB Interface to FrameTransformation Library

Class clib.FrameTransformation.struct0_T

  No Constructors defined

  No Methods defined

  No Properties defined

Class clib.FrameTransformation.FrameTransformation

  Constructors:
    clib.FrameTransformation.FrameTransformation()
    clib.FrameTransformation.FrameTransformation(clib.FrameTransformation.FrameTransformation)

  Methods:
    double getRotationMatrix(clib.FrameTransformation.struct0_T)

  No Properties defined

If I repeat these steps, using CppInterfaceStyle to 'Functions' it works as expected. (note some steps omitted to reduce post length)

  A = clib.getRotationMatrix.struct0_T
  A.bank_rad = 5.5
  A.heading_rad = 4.4
  A.pitch_rad = 3.3
  B = clib.getRotationMatrix.getRotationMatrix(A)

B =

   27.5000

I hear was the CppInterfaceStyle was a new feature in 2019B.

However I can't quite work out what i am doing wrong to be unable to get it to work.

Any help greatly appreciated.

Thanks

C

Note: Matlab 2020B, windows, Visual studio 2019