Gym-MiniGrid/docs/environments/red_blue_doors.md

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title: Red Blue Doors

Red Blue Doors

Description

The agent is randomly placed within a room with one red and one blue door facing opposite directions. The agent has to open the red door and then open the blue door, in that order. Note that, surprisingly, this environment is solvable without memory.

Mission Space

"open the red door then the blue door"

Action Space

Num	Name	Action
0	left	Turn left
1	right	Turn right
2	forward	Move forward
3	pickup	Unused
4	drop	Unused
5	toggle	Toggle/activate an object
6	done	Unused

Observation Encoding

• Each tile is encoded as a 3 dimensional tuple: (OBJECT_IDX, COLOR_IDX, STATE)
• OBJECT_TO_IDX and COLOR_TO_IDX mapping can be found in minigrid/minigrid.py
• STATE refers to the door state with 0=open, 1=closed and 2=locked

Rewards

A reward of '1' is given for success, and '0' for failure.

Termination

The episode ends if any one of the following conditions is met:

1. The agent opens the blue door having already opened the red door.
2. The agent opens the blue door without having opened the red door yet.
3. Timeout (see max_steps).

Registered Configurations

• MiniGrid-RedBlueDoors-6x6-v0
• MiniGrid-RedBlueDoors-8x8-v0