how to return float* from a function using embind

[Aaron]

Dear All

      I am new to emscripten, and I have read the docs and test it, it is amazing for me.
      But I have a question, I copy the demo and add a new function to return float*, then bind it and compile it.
     All the things here are ok.

     But when I invoke the getTest() in js, I got the UnboundTypeError: Cannot call MyClass.getM due to unbound types: Pf
     How can I fix it?

     The codes:

class MyClass {
public:
    MyClass(int x, std::string y)
        : x(x)
        , y(y)
    {
     test[0] = 0;
     test[1] = 0;
     }

    void incrementX() {
        ++x;
    }

    int getX() const { return x; }
    void setX(int x_) { x = x_; }
    float* getTest() {return test;}
    static std::string getStringFromInstance(const MyClass& instance) {
        return instance.y;
    }

private:
    int x;
    std::string y;
    float test[2];
 };

EMSCRIPTEN_BINDINGS(my_class_example) {
    class_<MyClass>("MyClass")
        .constructor<int, std::string>()
        .function("incrementX", &MyClass::incrementX)
        .function("getTest", &MyClass::getTest, allow_raw_pointers())
        .property("x", &MyClass::getX, &MyClass::setX)
        .class_function("getStringFromInstance", &MyClass::getStringFromInstance)
        ;
}

[Chad Austin]

Hi Aaron!

From JavaScript's perspective, what would you like getTest to return?  A single float value?  A JavaScript array?  A proxy for the memory in the Emscripten heap with some kind of accessor methods?

The meaning of a pointer is ambiguous enough that embind doesn't even try to assume a particular interpretation.

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Chad Austin

Technical Director, IMVU

http://engineering.imvu.com

http://chadaustin.me