Question

I want to pass Resize method of my Foo class object as the argument of glutReshapeFunc() but I get that error.
How should I pass it?

This is my definition of Resize:

class Foo{
    public:
    void Resize(int w, int h);
    ...
}

and this is how I try to call it

glutReshapeFunc(foo->Resize);

It was ok when foo was not a pointer, I use to pass foo.Resize and it worked.

Thanks in advance

Answer 1

Non-static functions take an additional hidden parameter (this) so they’re not compatible with a global, non-member, function with apparently similar signature.

You could make Resize a static, but you’ll have problem figuring out on what object to act. glutReshapeFunc mentions that

Before the callback, the current
window is set to the window that has
been reshaped.

so you can start from there in your static member.