Map Creator

Here is a detailed explanation on how to use the custom map creator


After you’ve conquered the test maps and your robot is able to run simple mazes, maybe you want something more challenging, or you want to test out some specific szenarios that our maps don’t offer.
For this you have access to the online Map Creator Tool.

Building the Maze

If you’re just building small maps for testing, then the correctness of the field is probably not of much importance to you. But if you’re planning on building an actual competition field, then you should definitely read through the official Simulation Rules.

Setting the size

The first step of creating your maze, is choosing the right size to start with.
Just enter your desired width and length in the input field. You can also resize your field later on, so just starting it bigger and downsizing it later can be smart. Setting the size

Placing walls

The next step is to setup your walls. We suggest that u start with the outer border and work your way through the middle, to create a maze. When placing the start tile, all floating tiles are marked with a green background and the tiles that are out of bounds are marked with a gray background.

Marking the area

After you’ve created the basic maze, you have to choose which section of the maze is supposed to be area 2 and 3, for this you can just tick the box for the respective area and start highlighting each tile.

Placing half-walls and curved walls

For tiles of area 2 and 3 there a now some additional options for wall placement. To place a half-wall on the edge of a normal tile, click on an existing wall. It will cycle though all possible placements. To place quarter-tile walls and curved walls open the Change items window.

Change item

By clicking on a tile a pop-up will open:

You have the following Options:

Setting Desription
Check point
Black hole
Sets the tile property to the respective type. Only one of these options should be selected at a time.
Obstacle Places an Obstacle. The shape and placement will be decided by random and can’t be changed in the editor itself, but you can edit and move the obstacle in Webots, after loading the .wbt file.
Cell Color Provides a drop-down to set the color for the connection tiles between areas. For information on how to position each connection correctly, please refer to the Rules.
Is the start tile? Sets the current tile as the starting tile. Replaces the previous start tile, if it has been defined before. After placing the start tile, all floating walls and out-of-bounds areas will be calculated.
Placement of victims Provides a grid a to place the victims on the respective position. For area 1 only one victim per tile can be placed.

Additional options for Area 2 and 3

Empty 2x2 grid Provides the possibility to place half-walls and curved walls. Clicking on one of the 4 inner walls will add or remove it. Clicking on the quarter-tiles will place/ rotate the curved walls.
It also works as a preview for the selected victims.
victim matrix Provides a matrix with which victims can be placed in all 16 possible positions. The small map above serves as a guide to where the victims are placed.
To remove a victim from a position, you have to tick the box at the bottom (the crossed out stick figure). Be aware that multiple victims per tile can be placed

Room 4

Currently, to insert a 4th room into their custom map, contestants can choose from a list of predefined room 4s to use, or create a custom layout.

Below are the steps to add a predefined 4th room, or watch beginning of this Youtube video for a visual demonstration and explanation.

  1. Go to your erebus folder that you downloaded. Navigate to erebus/game/protos, and look for the Area4_i.jpg files. Each file is a picture of one of the room 4s you can choose from. Pick which room 4 you would like to use and write down the following values:
    • The room 4 number (Area4_2.jpg -> room 4 #2)
    • The tile distance between the green and red entrance tiles. This is fixed.
  2. Go to the world editor, find the “Select Room 4 Configuration Button,” and select which room 4 you picked from step 1. The dropdown will tell you the size of that room 4.
  3. Create the outer border of room 4 manually
  4. Use the “Select Room 4 Tiles” button to select all tiles that belong to room 4.
  5. Use the “Cell Color” function to place your green and red tile. Note that the distance between them must be the same as from step 1.
    • If desired, the selected room 4 has the ability to be rotated. If you place the red and green tile with the appropriate distance between them, but rotate them 90, 180, or 270 degrees relative to your room 4 tiles, the imported room 4 will automatically be rotated appropriately.
  6. After the world is exported, you may notice that the victims and hazards of room 4 are slightly off due to rounding error. You can manually adjust this and then save your world.

Alternatively, contestants can draw custom room layouts. Watch this YouTube video explanation for a full visual demonstration on how to achieve this.