---
AUTOGENERATED: DO NOT EDIT FILE DIRECTLY
title: Lava Gap S7
---


# Lava Gap S7

### Description

The agent has to reach the green goal square at the opposite corner of the
room, and must pass through a narrow gap in a vertical strip of deadly lava.
Touching the lava terminate the episode with a zero reward. This environment
is useful for studying safety and safe exploration.

### Mission Space

Depending on the `obstacle_type` parameter:
- `Lava`: "avoid the lava and get to the green goal square"
- otherwise: "find the opening and get to the green goal square"

### 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       | Unused       |
| 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](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 reaches the goal.
2. The agent falls into lava.
3. Timeout (see `max_steps`).

### Registered Configurations

S: size of map SxS.

- `MiniGrid-LavaGapS5-v0`
- `MiniGrid-LavaGapS6-v0`
- `MiniGrid-LavaGapS7-v0`