Added base files for map generation and main loop for random walk generation

dungeonbattle/mapgeneration/randomwalk.py

@@ -0,0 +1,44 @@
+from random import choice, random, randint
+from dungeonbattle.interfaces import Map, Tile
+
+ class Generator:
+
+    def __init__(self, params):
+        self.params = params
+
+    def run(self):
+        width, height = self.params["width"], self.params["height"]
+        walkers = [Walker(width//2, height//2)]
+        grid = [[Tile.WALL] * width] * height
+        count = 0
+        while count < self.params["fill"] * width*height:
+            # because we can't add or remove walkers while looping over the pop
+            # we need lists to keep track of what will be the walkers for the
+            # next iteration of the main loop
+            next_walker_pop = []
+
+            for walker in walkers:
+                if grid[walker.y][walker.x] == Tile.WALL:
+                    count += 1
+                    grid[walker.y][walker.x] = Tile.EMPTY
+                if random() < self.params["turn_chance"]:
+                    walker.random_turn()
+                walker.move_in_bounds(width, height)
+                if random() > self.params["death_chance"]:
+                    next_walker_pop.append(walker)
+
+            # we use a second loop for spliting so we're not bothered by cases 
+            # like a walker not spliting because we hit the population cap even
+            # though the next one would have died and freed a place
+            # not a big if it happened though
+            for walker in walkers:
+                if len(next_walker_pop) < self.params["max_walkers"]:
+                    if random() < self.params["split_chance"]:
+                        next_walker_pop.append(walker.split())
+            walkers = next_walker_pop
+
+        start_x, start_y = randint(0, width), randint(0, height)
+        while grid[start_y][start_x] != Tile.EMPTY:
+            start_x, start_y = randint(0, width), randint(0, height)
+
+        return Map(width, height, grid, start_x, start_y)