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from ghost import Ghost
import pygame
from settings import settings
from typing_extensions import override
import math
class Clyde(Ghost):
def __init__(self, sprite_sheet, x, y):
super().__init__(sprite_sheet, "cyan", x, y)
def is_eight_tiles_away(self, pacman):
tile_width = 30
dx = self.x - pacman.x
dy = self.y - pacman.y
return math.sqrt(dx * dx + dy * dy) <= tile_width * 8
@override
def get_next_move(self, pacman, maze, screen, blinky):
dx = [1, 0, -1, 0] # right, down, left, up
dy = [0, 1, 0, -1]
inv_dir = [2, 3, 0, 1]
ret = len(dx) * [math.inf]
bottom_left_corner = (2.5 * 30, (len(maze) - 1 - 1 - 0.5) * 30)
forbidden = inv_dir[self.last_move]
for i in range(len(dx)):
nx = self.x + dx[i] * self.speed
ny = self.y + dy[i] * self.speed
if self.check_collision(nx, ny, 30, 30, maze):
if i != forbidden:
if self.is_eight_tiles_away(pacman):
ret[i] = self.heuristic(
(nx, ny), bottom_left_corner[0], bottom_left_corner[1])
if settings.debug:
pygame.draw.line(screen, self.color, (bottom_left_corner),
(self.x, self.y), 1)
else:
ret[i] = self.heuristic(
(nx, ny), pacman.x, pacman.y)
if settings.debug:
pygame.draw.line(screen, self.color, (pacman.x, pacman.y),
(self.x, self.y), 1)
min_h = min(ret)
# Favour going up when there is a conflict
if min_h == ret[3] and min_h != math.inf:
return 3
min_idx = ret.index(min_h)
return min_idx
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