glfwSetCursorPosCallback to function in another class

Question

I\'m really stuck:

I have the mainWindow and in the main game loop I do:

// poll for input
glfwPollEvents();

this->controls->handleInput(windo         


        

Answer 1

You can't pass a class's member function as a function. glfwSetCursorPosCallback it's expecting a function and throwing the error because it gets a member function.

In other words your expected to provide a global function and pass that to glfwSetCursorPosCallback.

If you really want the controls object to get the cursor position callback you could store an instance of Controls in a global variable and pass on the callback to that instance. Something like this:

static Controls* g_controls;

void mousePosWrapper( double x, double y )
{
    if ( g_controls )
    {
        g_controls->handleMouse( x, y );
    }
}

Then when you call glfwSetCursorPosCallback you can pass the mousePosWrapper function:

glfwSetCursorPosCallback( window, mousePosWrapper );