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24 changes: 15 additions & 9 deletions astar.py
Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@ def _init_cells(self):
for i in range(self.height):
for j in range(self.width):
self.cells[(i,j)] = Cell(self.screen,(i*self.cell_size, j*self.cell_size),(self.cell_size,self.cell_size))

def _add_coords(self,a,b):
return tuple(map(sum,zip(a,b)))

Expand Down Expand Up @@ -57,8 +57,12 @@ def _is_occupied(self,cell_coord):
return False

def _add_swamp(self, mouse_pos):
#insert swamp code here.
pass
swamp_coord = (mouse_pos[0]/50, mouse_pos[1]/50)
if self._is_occupied(swamp_coord):
if self.actors[swamp_coord].unremovable == False:
self.actors.pop(swamp_coord, None)
else:
self.actors[swamp_coord] = ObstacleTile( swamp_coord, self, './images/swamp.jpg', is_unpassable = False, terrain_cost = 3)

def _add_lava(self, mouse_pos):
lava_coord = (mouse_pos[0]/50, mouse_pos[1]/50)
Expand Down Expand Up @@ -91,14 +95,16 @@ def main_loop(self):
elif event.type is pygame.MOUSEBUTTONDOWN:
if self.add_tile_type == 'lava':
self._add_lava(event.pos)
#insert swamp code here
if self.add_tile_type == 'swamp':
self._add_swamp(event.pos)
elif event.type is pygame.KEYDOWN:
if event.key == pygame.K_SPACE:
self.paul.run_astar(self.cake.cell_coordinates, self)
self.paul.get_path()
elif event.key == pygame.K_l:
self.add_tile_type = 'lava'
#insert swamp code here
elif event.key == pygame.K_s:
self.add_tile_type = 'swamp'

class Actor(object):
def __init__(self, cell_coordinates, world, image_loc, unremovable = False, is_obstacle = True):
Expand All @@ -125,7 +131,7 @@ class ObstacleTile(Actor):
def __init__(self, cell_coordinates, world, image_loc, terrain_cost=0, is_unpassable = True):
super(ObstacleTile, self).__init__(cell_coordinates, world, image_loc, unremovable = False, is_obstacle = is_unpassable)
self.terrain_cost = terrain_cost

class Cell():
def __init__(self, draw_screen, coordinates, dimensions):
self.draw_screen = draw_screen
Expand Down Expand Up @@ -167,8 +173,8 @@ def get_h_cost(self, coord_a,coord_b):
def get_open_adj_coords(self, coords):
"""returns list of valid coords that are adjacent to the argument, open, and not in the closed list."""
#modify directions and costs as needed
directions = [(1,0),(0,1),(-1,0),(0,-1)]
costs = [1,1,1,1]
directions = [(1,0),(0,1),(-1,0),(0,-1),(1,1),(-1,1),(1,-1),(-1,-1),(2,0),(0,2),(-2,0),(-2,0)]
costs = [1,1,1,1,3,3,3,3,8,8,8,8]
adj_coords = map(lambda d: self.world._add_coords(coords,d), directions)
for i, coord in enumerate(adj_coords):
costs[i] += self.world.get_terrain_cost(coord)
Expand Down Expand Up @@ -226,7 +232,7 @@ def run_astar(self, destination_coord, world):
walkable_open_coords, costs = self.get_open_adj_coords(coord_s)
for idx,coord in enumerate(walkable_open_coords):
cell = self.cells[coord]
g_cost = cell_s.g_cost + costs[idx]
g_cost = cell_s.g_cost + costs[idx]
h_cost = self.get_h_cost(coord, destination_coord)
f_cost = g_cost + h_cost
if coord in self.open_list:
Expand Down
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