andrew-raphael-lukasik/.The Farmer Was Replaced.md

Toy maze solver (stateless) for https://store.steampowered.com/app/2060160/The_Farmer_Was_Replaced/

1337dondongo · 2025-10-22T17:54:23Z

I updated my code in the link. I drop the drones before starting the maze, and removed the clear function. This is in response to KanzakiRanko1 who had a great idea on letting spawned drones persist between mazes.

gist:6cb2506bb1847d1b4490260673aa49c4

zukord · 2025-10-23T05:31:30Z

In addition to the wall-following strategy, I created code that marks the forks, so it explores a fork until the end. If it doesn't find the treasure, it returns to the fork and explores the next one.

This is useful for larger mazes with a larger number of drones.

def create_maze():
	clear()
	plant(Entities.Bush)
	while get_entity_type()==Entities.Bush:
			substance = get_world_size() * 2**(num_unlocked(Unlocks.Mazes) - 1)
			if num_items(Items.Weird_Substance) > substance:
				use_item(Items.Weird_Substance, substance)
				return 1
			if can_harvest():
				harvest()
				plant(Entities.Bush)
			if num_items(Items.Fertilizer)==0:
				# I do not have trade unlocked
				#trade(Items.Fertilizer)
				return 0
			
			use_item(Items.Fertilizer)

# === Helper Functions ===

def turn_left(dir):
	if dir == North:
		return West
	if dir == West:
		return South
	if dir == South:
		return East
	if dir == East:
		return North

def turn_right(dir):
	if dir == North:
		return East
	if dir == East:
		return South
	if dir == South:
		return West
	if dir == West:
		return North

def try_move(dir):
	if can_move(dir):
		move(dir)
		return True
	return False

# === Strategy 1: Follow the left wall ===

def wall_follow_left():
	dir = North
	while True:
		left = turn_left(dir)
		if can_move(left):
			dir = left
			move(dir)
		elif can_move(dir):
			move(dir)
		else:
			dir = turn_right(dir)
		
		if get_entity_type() == Entities.Treasure:
			harvest()
			return 1


# === Strategy 2: Follow the right wall ===

def wall_follow_right():
	dir = North
	while True:
		right = turn_right(dir)
		if can_move(right):
			dir = right
			move(dir)
		elif can_move(dir):
			move(dir)
		else:
			dir = turn_left(dir)
		
		if get_entity_type() == Entities.Treasure:
			harvest()
			return 1

# === Strategy 3 (improved): Move towards the treasure with exploration memory ===

def move_towards_treasure():
	tiles = {}          # Dictionary: (x, y) -> info about walls and bifurcation
	path = []           # List containing the path taken
	bifurcations = []   # List containing bifurcations not yet fully explored

	while True:
		# If another drone already got the treasure, wait until the maze resets
		m = measure()
		if m == None:
			while measure() == None:
				return 1

		x = get_pos_x()
		y = get_pos_y()
		pos = (x, y)

		# Check if standing on the treasure
		if get_entity_type() == Entities.Treasure:
			harvest()
			return 1

		# Detect walls around the current tile
		walls = {
			North: not can_move(North),
			East:  not can_move(East),
			South: not can_move(South),
			West:  not can_move(West)
		}

		# If the tile hasn't been recorded yet
		if pos not in tiles:
			n_walls = 0

			if walls[North]:
				n_walls = n_walls + 1
			if walls[East]:
				n_walls = n_walls + 1
			if walls[South]:
				n_walls = n_walls + 1
			if walls[West]:
				n_walls = n_walls + 1

			is_bifurcation = n_walls < 3  # Less than 3 walls = bifurcation

			tiles[pos] = {
				"walls": walls,
				"visited": True,
				"bifurcation": is_bifurcation
			}

			if is_bifurcation:
				bifurcations.append(pos)

		# Mark the tile as visited
		tiles[pos]["visited"] = True

		if len(path) == 0 or path[-1] != pos:
			path.append(pos)

		# Find free directions not yet visited
		free_dirs = []
		for d in [North, East, South, West]:
			if not walls[d]:
				dx = 0
				dy = 0
				if d == North:
					dy = 1
				elif d == South:
					dy = -1
				elif d == East:
					dx = 1
				elif d == West:
					dx = -1

				next_pos = (x + dx, y + dy)

				if next_pos not in tiles or not tiles[next_pos]["visited"]:
					free_dirs.append(d)

		# Randomly choose one of the available directions
		if len(free_dirs) > 0:
			r = random()
			dir = free_dirs[0]

			if len(free_dirs) == 2:
				if r > 0.5:
					dir = free_dirs[1]
			elif len(free_dirs) == 3:
				if r < 0.33:
					dir = free_dirs[0]
				elif r < 0.66:
					dir = free_dirs[1]
				else:
					dir = free_dirs[2]
			elif len(free_dirs) == 4:
				if r < 0.25:
					dir = free_dirs[0]
				elif r < 0.5:
					dir = free_dirs[1]
				elif r < 0.75:
					dir = free_dirs[2]
				else:
					dir = free_dirs[3]

			move(dir)
			continue

		# No free paths — backtrack to the previous bifurcation
		if len(path) > 1:
			path.pop()
			prev = path[-1]
			px = prev[0]
			py = prev[1]

			# Physically move backwards
			if px > x:
				move(East)
			elif px < x:
				move(West)
			elif py > y:
				move(North)
			elif py < y:
				move(South)

			x = get_pos_x()
			y = get_pos_y()
			pos = (x, y)

			# If back at a bifurcation, try another unexplored direction
			if pos in tiles and tiles[pos]["bifurcation"]:
				walls = tiles[pos]["walls"]
				free_dirs = []

				for d in [North, East, South, West]:
					if not walls[d]:
						dx = 0
						dy = 0
						if d == North:
							dy = 1
						elif d == South:
							dy = -1
						elif d == East:
							dx = 1
						elif d == West:
							dx = -1
						next_pos = (x + dx, y + dy)

						if next_pos not in tiles or not tiles[next_pos]["visited"]:
							free_dirs.append(d)

				if len(free_dirs) > 0:
					r = random()
					dir = free_dirs[0]

					if len(free_dirs) == 2:
						if r > 0.5:
							dir = free_dirs[1]
					elif len(free_dirs) == 3:
						if r < 0.33:
							dir = free_dirs[0]
						elif r < 0.66:
							dir = free_dirs[1]
						else:
							dir = free_dirs[2]
					elif len(free_dirs) == 4:
						if r < 0.25:
							dir = free_dirs[0]
						elif r < 0.5:
							dir = free_dirs[1]
						elif r < 0.75:
							dir = free_dirs[2]
						else:
							dir = free_dirs[3]

					move(dir)

			
def treasure_hunt():
	
	# Uses wall-following strategies
	spawn_drone(wall_follow_left)
	spawn_drone(wall_follow_right)
	
	# Uses the bifurcation exploration strategy
	while num_drones() != max_drones():
		spawn_drone(move_towards_treasure)

	move_towards_treasure()

to use

from MazeUtil2 import create_maze, treasure_hunt

times = 30

#for i in range(times):
	
	#create_maze()
	#treasure_hunt()

while True:
	if create_maze():
		if treasure_hunt():
			continue

I made a few changes to Filipe-Brr's code and it seems to be going much faster. I moved clear() from the beginning of def create_maze to right above the while loop in the trigger code (the one marked as "to use"). At first this made the maze only run a few times then stall, but this was fixed by changing the last paragraph of def treasure_hunt() as follows:

while num_drones() != max_drones():
		spawn_drone(move_towards_treasure)
		if get_entity_type() != Entities.Hedge:
			return 1

It now works indefinitely, and after when it would have normally stalled all the drones stay in their previous positions when the map reloads, making for much faster maze clear times.

LatiusAuro · 2025-10-28T22:08:27Z

One of the things I would add to the code would be with the Strategy 3 stuff.

That is updating the for d checks for this:

		for d in [North, East, South, West]:
			if not walls[d]:
				dx = 0
				dy = 0
				if d == North:
					dy = 1
				elif d == South:
					dy = -1
				elif d == East:
					dx = 1
				elif d == West:
					dx = -1

				next_pos = (x + dx, y + dy)
				
				if next_pos == m: #You're right next to the chest, so move there!
					move(d)
					harvest()
					return 1

				if next_pos not in tiles or not tiles[next_pos]["visited"]:
					free_dirs.append(d)

I also do try to 'priortize' moves that would lead closer to the chest's X/Y coordinates, but that doesn't always work faster.

	def treasure_hunt():
	dir = West
	x = get_pos_x()
	y = get_pos_y()
	while True:
	move(dir)

	x2 = get_pos_x()
	y2 = get_pos_y()

	if x==x2 and y==y2:
	if dir==West:
	dir = North
	elif dir==North:
	dir = East
	elif dir==East:
	dir = South
	elif dir==South:
	dir = West
	else:
	x = get_pos_x()
	y = get_pos_y()

	if dir==West:
	dir = South
	elif dir==North:
	dir = West
	elif dir==East:
	dir = North
	elif dir==South:
	dir = East

	if get_entity_type()==Entities.Treasure:
	harvest()
	create_maze()

andrew-raphael-lukasik/.The Farmer Was Replaced.md

1337dondongo commented Oct 22, 2025

Uh oh!

zukord commented Oct 23, 2025

Uh oh!

LatiusAuro commented Oct 28, 2025

Uh oh!

	def create_maze():
	clear()

	for i in range(get_world_size()):
	plant(Entities.Bush)

	while get_water()<0.9:
	use_item(Items.Water)

	move(North)

	for i in range(get_world_size()):
	while can_harvest()==False:
	pass

	while get_entity_type()==Entities.Bush:
	if num_items(Items.Fertilizer)==0:
	trade(Items.Fertilizer)
	#if num_items(Items.Fertilizer)==0:
	#main()

	use_item(Items.Fertilizer)

	treasure_hunt()