You need to use embind to define the return type and the function. https://emscripten.org/docs/porting/connecting_cpp_and_javascript/embind.html
On Fri, 21 Feb 2020 at 06:44, Shawn Riordan <[email protected]> wrote: > I am new at this, so don't laugh. > > I am able to make C/C++ functions that javascript can call. When the > parameters are out only. > > Can I make them return parameters? > > Lets say I want to return a point. Two values, x and y. > In C/C++ I would make my function look like: > > void getFoo( float &x, float &y); > > and have the implementation fill in the values for those two references. > The caller could then read the values out of the variables they passed in. > > How do I do a similar thing with WebAssembly and javascript? > > At the moment, I am implementing the solution by having the WebAssembly > code call back to javascript with the answer. But that feels wrong in many > ways. > > Also, allocating a shared buffer to write to, feels wrong in this case. > Since it happens on mouse move and all those memory allocations seem > wasteful. > > What is the right way to do this? > > -- > You received this message because you are subscribed to the Google Groups > "emscripten-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/emscripten-discuss/73244098-e837-46e7-892e-d39346405347%40googlegroups.com > <https://groups.google.com/d/msgid/emscripten-discuss/73244098-e837-46e7-892e-d39346405347%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/CA%2B_KjGY_HnpuvrKd8O%3DFTyXN7%2BSdrDhLZwoT97q%2Bj3Bj7yw3eQ%40mail.gmail.com.
