Example or command line tool to show how to build `*_ddf.h` from `.proto` files

[aglitchman]

It would be great to have an example or a command line tool (.sh) to demonstrate how to generate *_ddf.h files from .proto files. It's necessary thing to know what properties do we have in C++/Java.

I didn't find examples in the Spine and Rive extensions either, so I conclude that the team is using some of their own tools to generate. It would be cool if you could share an example.

In the meantime, I have not been able to combine protoc and ddf_cxx for it to produce a proper result.

Many thanks!

[britzl]

The basic step of generating .cpp and .h from .proto is:

protoc --cpp_out=out -I=tmp/dynamo_home/share/proto -I=tmp/dynamo_home/ext/include --proto_path=engine engine/particle/proto/particle/particle_ddf.proto

This will generate out/particle/proto/particle/particle_ddf.pb.cc and out/particle/proto/particle/particle_ddf.pb.h. Assuming it is run from the defold extension root and you've run install_ext to copy proto files to dynamo home.