Regarding OpenGL basd visualizer

[mmmovania]

I noticed that there is no opengl/directx based previsualizer or renderer builtin this engine. Are there plans to do that?

[doyubkim]

Thanks for the comment! Yes, although some examples in this engine have some exporters to Matplotlib, it would be great to have a built-in previz tool. Let me use this issue to track it. Maybe simple glfw-based viewer would be nice.

[mmmovania]

Great I am working on this for myself. Will share with you when done.

[doyubkim]

Sounds great, thanks!

[doyubkim]

This feature is almost ready to roll out (checkout viz branch). I'm introducing jet.viz module with GL implementation inside. Documentation and Python binding is still missing, though. Also, name of the module may change since I think there should be a better name than viz :)

[mmmovania]

Thanks will have a look :)

[doyubkim]

I've merged (technically, I rebased, but..) viz branch into gpu branch. Any latest dev work will happen in gpu branch. Note that it also contains some CUDA experiments, so if you don't want that feature, you can turn if off by passing -DUSE_CUDA=OFF to the cmake command. Both GL and CUDA are WIP, so there might be some build issues. (I'm mostly testing with macOS and Windows + Visual C++ 2015)

[subatomicglue]

Solution how to fix the glfw3 dependency (on MacOSX):

> mkdir build
> cd build
> cmake -DUSE_CUDA=OFF ..
...
-- Found OpenGL: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/System/Library/Frameworks/OpenGL.framework
CMake Error at CMakeLists.txt:53 (find_package):
  By not providing "Findglfw3.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "glfw3", but
  CMake did not find one.

  Could not find a package configuration file provided by "glfw3" with any of
  the following names:

    glfw3Config.cmake
    glfw3-config.cmake

  Add the installation prefix of "glfw3" to CMAKE_PREFIX_PATH or set
  "glfw3_DIR" to a directory containing one of the above files.  If "glfw3"
  provides a separate development package or SDK, be sure it has been
  installed.

Need to install glfw per their instructions.
As you can see, this includes all the headers, libs, and the .cmake files needed to find glfw

git clone https://github.com/glfw/glfw.git
cd glfw
mkdir build
cd build/
cmake ..
make -j 8
make install

-- Install configuration: ""
-- Installing: /usr/local/include/GLFW
-- Installing: /usr/local/include/GLFW/glfw3.h
-- Installing: /usr/local/include/GLFW/glfw3native.h
-- Installing: /usr/local/lib/cmake/glfw3/glfw3Config.cmake
-- Installing: /usr/local/lib/cmake/glfw3/glfw3ConfigVersion.cmake
-- Installing: /usr/local/lib/cmake/glfw3/glfw3Targets.cmake
-- Installing: /usr/local/lib/cmake/glfw3/glfw3Targets-noconfig.cmake
-- Installing: /usr/local/lib/pkgconfig/glfw3.pc
-- Installing: /usr/local/lib/libglfw3.a

cd ../../fluidengine/build
cmake -DUSE_CUDA=OFF ..
make -j 8

[doyubkim]

Thanks for trying out the branch, @subatomicglue ! For macOS, you can use Homebrew to install glfw. (For Ubuntu, apt-get. For Windows, NuGet.) But yeah, I also want to make the code almost self-buildable with very basic build tools, so let me see if I can think of alternative approaches (such as git submodule or CMake externalproject_add).