use std::env;
use std::mem;
use std::path::Path;
use std::rc::Rc;
use crate::engine::GraphicsManager;
use crate::physics::{PhysicsEvents, PhysicsSnapshot, PhysicsState};
use crate::plugin::TestbedPlugin;
use crate::ui::TestbedUi;
use kiss3d::camera::Camera;
use kiss3d::event::Event;
use kiss3d::event::{Action, Key, WindowEvent};
use kiss3d::light::Light;
use kiss3d::loader::obj;
use kiss3d: