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

An alternative solution would be to associate a pointer to controls to the GLFWindow. See glfwSetWindowUserPointer.

The pointer can be retrieved at an time form the GLFWWindow object by glfwGetWindowUserPointer. Of course the return type is void* and has to be casted to Controls*.

Instead of the global function or static method a Lambda expressions can be used. e.g:

glfwSetWindowUserPointer(window, this->controls);

glfwSetCursorPosCallback( window, [](GLFWwindow *window, double x, double y)
{
    if (Controls *controls = static_cast(glfwGetWindowUserPointer(window)))
        controls->handleMouse(window, x, y);
} );