how to configure the header file tigl_config.h and run the program?

[tigllearner]

  I am the beginner of Tigl,I want to run the code in the "unittests" folder,but I find some header files such as tigl_config.h don't exist，I want to use cmake to configure that header file by tigl_config.h.in ,but I didn't success ,so I want to know if I'm doing it the right way?if not ,what should I do?thanks a lot!

[joergbrech]

Hello @tigllearner, I like your user name!

If you could let me know the steps you followed to build TiGL, I might give you better pointers on what to change.

In general, if you want to build TiGL from source, you would have to run CMake in the root directory of the TiGL repository. If you do so, CMake will automatically configure tigl_config.h. So I suggest creating a subdirectory build and invoking the cmake command from there, passing the tigl root directory as the argument. Note that the unit tests are not build automatically. You have to explicitly set the CMake Option TIGL_BUILD_TESTS to be ON. Also, you have to make sure that TiGL's requirements (OpenCascade and TiXI3) are installed and can be foun by CMake.

mkdir build
cd build
cmake -DTIGL_BUILD_TESTS=ON ..

[tigllearner]

thanks very much for your reply,I'm trying to solve this problem ,by the way,Is there any tutorial C++ demo about creating a wing or fuselage?include the generation of wing spars and wing ribs,I ever found the open code and relevant paper,but I found they are very few.could you give me some advice?I will be very happy if I hear from you.

[joergbrech]

Traditionally, TiGL interprets a CPACS file with a description of an airplane geometry, including wings, fuselages, ribs and spars without the possibility to modify these CPACS entities (it is "read only"). To get you started, I suggest looking into the CPACS documentation and examples: https://github.com/DLR-SL/CPACS, https://www.cpacs.de/. You can also find some example CPACS file as part of TiGLs automated tests: https://github.com/DLR-SC/tigl/tree/master/tests/integrationtests/TestData, https://github.com/DLR-SC/tigl/tree/master/tests/unittests/TestData.

To create geometries, users usually go one of two ways:

1. Create a CPACS file using some external tools and just use TiGL for the geometry export, analysis etc.

2. Use CPACSCreator, a branch of TiGL that actually lets you manipulate CPACS entities/geometries. It doesn't have the full set of features and ribs and spars cannot be created from scratch yet (though this is on our long term roadmap). But you can read in a CPACS file that has ribs and spars defined, and still manipulate the wing outer shape in such a way that the existing internal structure follows the new CPACS parametrization.

   As far as I know, most users of CPACSCreator use it from Python, so unfortunately, we do not have many C++ examples yet. You can find Python examples here: https://github.com/DLR-SC/tigl/blob/cpacs_creator_dev/examples/python/create_space_ship.py, https://github.com/DLR-SC/tigl-examples/tree/master/tigl/python/cpacscreator-animation.

Let me know which option is better suited to your needs and if there is anything in particular I can help you with. If you would like to use CPACSCreator from C++, maybe I can set up a minimalistic example for you.

[tigllearner]

thanks for your suggestion!I'm going to look into it.

[joergbrech]

I will move this issue to the discussions, if you don't mind.

[rainman110]

As a guideline to build tigl, check the wiki here: https://github.com/DLR-SC/tigl/wiki/Building-TiGL-from-Source

Unfortunately, this is somewhat outdated as tigl requires newer compilers (VC 2019 on windows) and the newer opencascade version 7.4.0.

Probably the easiest way to build tigl from source is to create a build environment with conda:

conda create -n tigl3-dev cmake tixi3 ninja qt=5.15.2 opencascade-static=7.4.0 pythonocc-core=7.4.1 tbb-devel freetype-static=2.6 freeimageplus-static -c dlr-sc -c dlr-sc/label/tigl-dev

Then switch into this environment

conda activate tigl3-dev

And build tigl like a normal cmake-based project

cmake -B build_dir -DTIGL_BUILD_TESTS=ON -G Ninja
cmake --build build_dir 

The first command configures the build process, the second performs the actual compilation.

To run the tests, go to the build_dir\tests\unittests directory and execute the tests.

cd build_dir\tests\unittests
TiGL-unittests.exe

@joergbrech The official build instructions from the wiki might need so referesh.

[agodemar]

@rainman110 @joergbrech what about OCCT v7.6.0 or v7.6.3?
I have tried to compile myself TiGL using the latest version of OpenCASCADE, v7.6.3 and it requires few, but manageble, tweaks.

[joergbrech]

Thanks for the heads up. I will look into updating to a newer OCCT version.

[agodemar]

@joergbrech meanwhile OCCT v7.7.0 has been released

[joergbrech]

Note: I just overhauled the build instructions in our wiki.