Struct gym_rs::CartPoleEnv

pub struct CartPoleEnv { /* fields omitted */ }

Description: A pole is attached by an un-actuated joint to a cart, which moves along a frictionless track. The pendulum starts upright, and the goal is to prevent it from falling over by increasing and reducing the cart’s velocity.

Source: https://github.com/openai/gym This environment corresponds to the version of the cart-pole problem described by Barto, Sutton, and Anderson

Observation: Type: Vec Index Observation Min Max 0 Cart Position -4.8 4.8 1 Cart Velocity -Inf Inf 2 Pole Angle -0.418 rad (-24 deg) 0.418 rad (24 deg) 3 Pole Angular Velocity -Inf Inf

Actions: Type: Discrete(2) Num Action 0 Push cart to the left 1 Push cart to the right

Note: The amount the velocity that is reduced or increased is not
fixed; it depends on the angle the pole is pointing. This is because
the center of gravity of the pole increases the amount of energy needed
to move the cart underneath it

Reward: Reward is 1 for every step taken, including the termination step

Starting State: All observations are assigned a uniform random value in [-0.05..0.05]

Episode Termination: Pole Angle is more than 12 degrees. Cart Position is more than 2.4 (center of the cart reaches the edge of the display). Episode length is greater than 200. Solved Requirements: Considered solved when the average return is greater than or equal to 195.0 over 100 consecutive trials.

Trait Implementations

impl Debug for CartPoleEnv

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for CartPoleEnv

fn default() -> Self

Returns the “default value” for a type.

impl GymEnv for CartPoleEnv

fn step(&mut self, action: ActionType) -> (Vec<f64>, f64, bool, Option<String>)

Run one timestep of the environment’s dynamics. When end of episode is reached, you you are responsible for calling ‘reset()’ to reset this environment’s state

fn reset(&mut self) -> Vec<f64>

Reset the environment to an initial state This function should not reset reset the environment’s random number generator(s) Returns the environments initial state

fn render(&self, render: &mut GifRender<'_>)

Render the environment

fn seed(&mut self, seed: u64)

Set the seed for this environments random number generator