open_fridge.py

from typing import List, Tuple
import numpy as np
from pyrep.objects.joint import Joint
from pyrep.objects.object import Object
from pyrep.objects.shape import Shape
from rlbench.backend.conditions import JointCondition
from rlbench.backend.task import Task


class OpenFridge(Task):

    def init_task(self):
        self.register_success_conditions(
            [JointCondition(Joint('top_joint'), np.deg2rad(70))])

    def init_episode(self, index: int) -> List[str]:
        return ['open fridge',
                'grip the handle and slide the fridge door open',
                'open the fridge door']

    def variation_count(self) -> int:
        return 1

    def boundary_root(self) -> Object:
        return Shape('fridge_root')

    def base_rotation_bounds(self) -> Tuple[Tuple[float, float, float],
                                            Tuple[float, float, float]]:
        return (0.0, 0.0, -np.pi / 4), (0.0, 0.0, np.pi / 4)