Web platform about raylib-go

[gen2brain]

Now there is a different problem, _emscripten_set_main_loop issue is solved with this https://github.com/gen2brain/raylib-go/blob/master/raylib/external/scripts/emcc-generate-js.sh#L15 .

Function that is set with SetMainLoop(somefunc, 0, true) is running in loop as it should, but doesn't render anything on screen, first frame is visible and then just gray background.

http://81.4.106.254/raylib-go/

[gen2brain]

I have a clue now what is wrong. The only working functions in raylib_js.go for now are the one that doesn't return or accept structs, like InitWindow() for example, the others should be called like this, via ccall http://kripken.github.io/emscripten-site/docs/porting/connecting_cpp_and_javascript/Interacting-with-code.html#interacting-with-code-call-javascript-from-native and http://kripken.github.io/emscripten-site/docs/api_reference/preamble.js.html#ccall.

Something like this in GopherJS:

// LoadWaveEx is used, not _LoadWaveEx name that is exported
js.Global.Get("Module").Call("ccall", "LoadWaveEx", "array",
		[]string{"array", "number", "number", "number", "number"},
		[]interface{}{data, sampleCount, sampleRate, sampleSize, channels})

But then, there is again problem for all functions that work with structs passed by value. Structs can be converted to []byte with unsafe or encodings/binary, so GopherJS pass it as TypedArray, argument type from emscripten side is then array, but return type can not be array, only number or string, emscripten complains then, because it can not know size.

I will look more what can be done with http://kripken.github.io/emscripten-site/docs/porting/connecting_cpp_and_javascript/WebIDL-Binder.html#webidl-binder and http://kripken.github.io/emscripten-site/docs/porting/connecting_cpp_and_javascript/embind.html#embind , results can be complete bindings to raylib in javascript, example is box2d here https://github.com/kripken/box2d.js , that can than be easily used from GopherJS .

Edit: embind example here emscripten-core/emscripten#3083 (comment)

[gen2brain]

Closing for now, don't have time for this, I tried to use embind but it is not so easy.