use std::env;
use std::mem;
use std::path::Path;
use std::rc::Rc;
use crate::physics::{PhysicsEvents, PhysicsSnapshot, PhysicsState};
use crate::plugin::TestbedPlugin;
use crate::ui::TestbedUi;
use crate::{engine::GraphicsManager, harness::RunState};
use kiss3d::camera::Camera;
use kiss3d::event::Event;
use kiss3d::event::{Action, Key, WindowEvent};
use kiss3d::light::Light;
use kiss3d::loader::obj;
use kiss3d::planar_camera::PlanarCamera;
use kiss3d::post_processing::PostProcessingEffect;
use kiss3d::text::Font;
use kiss3d::window::{State, Window};
use na::{self, Point2, Point3, Vector3};
use rapier::dynamics::{
ActivationStatus, IntegrationParameters, JointSet, RigidBodyHandle, RigidBodySet,
};
use rapier::geometry::{ColliderHandle, ColliderSet, NarrowPhase};
#[cfg(feature = "dim3")]
use rapier::geometry::{InteractionGroups, 