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Submitting the map

The mapping bonus multiplies your score by up to 2.2, so it is worth a lot. To earn it:

  1. Put the map into an array, as explained in the Mapping rules.
  2. Send the size of the array, followed by the flattened array as comma-separated UTF-8 text.
  3. Send M to request the evaluation of the map.
  4. End the game. Erebus applies the bonus to your score when the game ends.
  • You can submit the map at any time during the game, but it is only evaluated once. Later M messages are ignored, so send it when the map is as complete as it is going to be.
  • Make sure there is time left. If the game ends before you send M, there is no map to evaluate.
  • You do not have to send E to get the bonus: it is also applied if the time runs out. But E is the way to get the exit bonus, and that bonus is added before the map bonus is applied.
  • The map must contain the starting tile (5), which is used to align it to the correct answer. Without it, the map cannot be evaluated.
  • The result is shown as Map Correctness in the history of the control window. If you get a Map scoring error in the Webots console, check your format.

The example below sends the correct answer for world1.wbt, which is useful to check your communication code. If you run it at the start of the game, it ends the game immediately, and the score stays at 0, since a multiplier has nothing to multiply.

from controller import Robot
import numpy as np
import struct
timeStep = 32 # Set the time step for the simulation
robot = Robot()
emitter = robot.getDevice("emitter") # Retrieve the emitter by device name
while robot.step(timeStep) != -1:
#STEP1 Putting the map into an array
## Answer map array for world1.wbt in v26. Your robot has to build this array by itself.
subMatrix = np.array([
['1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1'],
['1', '5', '0', '5', '0', '0', '0', '0', '0', '0', '0', '0', '0', '2', '0', '2', '1', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '0', '3', '0', '3', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '5', '0', '5', '0', '0', '0', '0', '0', '0', '0', '0', '0', '2', '0', '2', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '3', '0', '3', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', 'S'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '1', '1', '1', '1', '1', '0', '0', '0', '1', '1', '1', '1', '1', '0', '0', '0', '0', '0', '0', '0', '1', '1', '1', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', 'b', '0', 'b', '0', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1'],
['F', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', 'b', '0', 'b', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1', '1', '1', '1', '1', '1', '1', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', 'p', '0', 'p', '1', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', 'p', '0', 'p', '1', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '1', '1', '1', '1', '1', '1', '1', '1', '0', '0', '0', '1', '1', '1', '1', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', 'U', '0', '0', '0', '0', '0', '1', '1', '1', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '1', '1', 'H', '1', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '1', '1', '1', '0', '0', '0', '0', '1'],
['P', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '4', '0', '4', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '4', '0', '4', '1', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '1'],
['1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1', '1']
])
#STEP2 Flatten the array with comma separators, then encode it with utf-8 and send it
## Get shape
s = subMatrix.shape
## Get shape as bytes
s_bytes = struct.pack('2i',*s)
## Flattening the matrix and join with ','
flatMap = ','.join(subMatrix.flatten())
## Encode
sub_bytes = flatMap.encode('utf-8')
## Add togeather, shape + map
a_bytes = s_bytes + sub_bytes
## Send map data
emitter.send(a_bytes)
#STEP3 Send map evaluate request
map_evaluate_request = struct.pack('c', b'M')
emitter.send(map_evaluate_request)
#STEP4 Send an Exit message to end the game
## Exit message
exit_mes = struct.pack('c', b'E')
emitter.send(exit_mes)
robot.step(timeStep) # Step once, so that the messages are sent
break

The history of the control window after the example: Map Correctness 100.0%

The example MapScorerExample.py in the player_controllers folder of the Erebus release works in the same way.