PATurmel
September 4, 2018, 9:45pm
1
There is a good description here for building a wasm using HAXE and WebAssembly
https://groups.google.com/forum/#!topic/haxelang/Pcm38LPFjW0
I want a class file similar to the one at this example on Github ( which does not use HAXE )
PATurmel
September 5, 2018, 9:34pm
2
Anyone?
The problem is how to use the WebAssembly (Emscripten) ‘Embind’ to pass the variables.
damoebius
September 6, 2018, 9:15am
3
Hey, i tried do find a way to do it few month ago but i failed.
God, it’s too hard for me, i give up.
I tryed to wrap again my haxe class but i couldn’t do a valid instance.
obj = new ::hxcpp::ScreenPressor_obj(width,height);
→ error: no matching constructor for initialization of ‘::hxcpp::ScreenPressor_obj’
OR
obj = ::hxcpp::ScreenPressor_obj::__alloc( HX_CTX ,(int)960,(int)540);
→ Error: ./src/hxcpp/Main.cpp:29:50: error: use of undeclared identifier ‘_hx_ctx’
obj = ::hxcpp::ScreenPressor_obj::__alloc( HX_CTX ,(int)960,(int)540);
^
haxelib/…
opened 12:00PM - 18 Jun 18 UTC
Embind is used to bind C++ functions and classes to JavaScript, so that the comp… iled code can be used in a natural way by “normal” JavaScript.
According to this documentation how can i use Embind in my Haxe code ?
https://kripken.github.io/emscripten-site/docs/porting/connecting_cpp_and_javascript/embind.html
```cpp
#include <emscripten/bind.h>
using namespace emscripten;
float lerp(float a, float b, float t) {
return (1 - t) * a + t * b;
}
EMSCRIPTEN_BINDINGS(my_module) {
function("lerp", &lerp);
}
```
I hope you’ll have more success
PATurmel
September 6, 2018, 2:35pm
4
Come to think, it may not be practical for HAXE to use a C++ class since issues such as memory management would require knowing how the class is used.
jeremyfa
September 6, 2018, 3:45pm
5
See there: Embind — Emscripten 3.1.52-git (dev) documentation
It’s fine to expose a C++ class instance to JS as long as the JS side explicitly calls obj.delete() once it’s done with it.
