int main() {
SceneManager scenemanager;
while (env.isOpen()) {
env.begin();
auto start = std::chrono::system_clock::now();
scenemanager.update();
scenemanager.shift();
scenemanager.draw();
auto end = std::chrono::system_clock::now();
auto msec = std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count();
std::cout << "sec " << msec << std::endl;
env.end();
}
}
void FinalProjectApp::draw()
{
clear( Color( 0, 0, 0 ) );
sm.draw();
}