#ifndef BALL_H #define BALL_H #include "GraphicsObject.h" //#include "PhysicsObject.h" class Ball : public GraphicsObject { public: Ball() : GraphicsObject(&Ball::SetX, this) // pointer to self (specific instance) { instance_num = ++instance_counter; // NOTE(dev): don't go above 100, please, for the sake of the example. } void GetXFromPhysicsSimulation() { x = instance_num + ((rand() % 10) * 100); // move around by ten, but keep single digit } static void SetX(int &x, void *instance) { Ball *ball = static_cast(instance); ball->GetXFromPhysicsSimulation(); return; } private: static int instance_counter; int instance_num; }; int Ball::instance_counter = 0; #endif