i’m trying to make a pacman game like pygame, now i just want him to walk through the maze without going beyond the walls of the maze. However I have faced some problems, when I press the keys to move the pacman, he ends up telephoning between the walls, although he does not exceed them it ends up bugging the coordinate system and starts to give a series of errors during the game commands . Does anyone know why this is happening and how to solve it?
import pygame
pygame.init()
window = pygame.display.set_mode((800, 600), 0)
# Color used in the game
YELLOW = (255,255,0)
BLACK = (0,0,0)
BLUE = (13,56,143)
speed = 1
class Scenery:
def __init__(self, size, character):
self.character = character
self.size = size
self.matrix = [
[2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2],
[2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 2],
[2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2],
[2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2],
[2, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 0, 0, 0, 0, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 1, 2, 0, 0, 0, 0, 0, 0, 2, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 1, 1, 1, 1, 1, 2, 2, 1, 2, 0, 0, 0, 0, 0, 0, 2, 1, 2, 2, 1, 1, 1, 1, 1, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 1, 2, 0, 0, 0, 0, 0, 0, 2, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 2],
[2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2],
[2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2],
[2, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 1, 2],
[2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2],
[2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]
]
def paint_line(self, surface, line_index, line):
for column_index, column in enumerate(line):
x_box = column_index * self.size
y_box = line_index * self.size
half_size = self.size // 2
color = BLACK
if column == 2:
color = BLUE
pygame.draw.rect(surface, color, (x_box, y_box, self.size, self.size), 0)
if column == 1:
pygame.draw.circle(surface, YELLOW, (x_box + half_size, y_box + half_size), self.size//10, 0)
def paint_scenery(self, surface):
for line_index, line in enumerate(self.matrix):
self.paint_line(surface, line_index, line)
def calculate_rules(self):
column_character = self.character.intention_column
line_character = self.character.intention_line
if 0 <= column_character < 28 and 0 <= line_character < 29:
if self.matrix[line_character][column_character] != 2:
self.character.aprove_movement()
class Pacman:
def __init__(self, size):
self.column = 1
self.line = 1
self.x_center = 400
self.y_center = 300
self.size = size # 2x radius and size/number of the cells
self.speed_x = 0
self.speed_y = 0
self.radius = self.size // 2
self.intention_column = self.column
self.intention_line = self.line
def calculate_rules(self):
# calculate the movimentantion
self.intention_column = self.intention_column + self.speed_x
self.intention_line = self.intention_line + self.speed_y
self.x_center = int( self.column * self.size + self.radius )
self.y_center = int( self.line * self.size + self.radius )
def draw_pacman(self, surface):
# Draw pacman's character
pacman_body = pygame.draw.circle(surface, YELLOW, (self.x_center, self.y_center), self.radius, 0)
# Coordinates
x_eye_position = ( self.x_center + int( self.radius/4 ) )
y_eye_position = ( self.y_center - int( (self.radius/2) ) )
point_a = (self.x_center, self.y_center) # Center
point_b = ((self.x_center + self.radius), self.y_center) # Right Center
point_c = ((self.x_center + self.radius), (self.y_center - self.radius)) # Superior Right Center
points = [point_a, point_b, point_c]
# Pacman
pacman_eye = pygame.draw.circle(surface, BLACK, (x_eye_position, y_eye_position), int(self.radius/10), 0)
pacman_mouth = pygame.draw.polygon(surface, BLACK, points, 0)
# Make the draws
pacman_body
pacman_eye
pacman_mouth
def calculate_events(self, events):
for e in events:
if e.type == pygame.QUIT: # check if the user have clicked on the X box to quit
exit()
elif e.type == pygame.KEYDOWN:
if e.key == pygame.K_RIGHT or e.key == pygame.K_d:
self.speed_x = speed
elif e.key == pygame.K_LEFT or e.key == pygame.K_a:
self.speed_x = -speed
elif e.key == pygame.K_UP or e.key == pygame.K_w:
self.speed_y = -speed
elif e.key == pygame.K_DOWN or e.key == pygame.K_s:
self.speed_y = speed
elif e.type == pygame.KEYUP:
if e.key == pygame.K_RIGHT or e.key == pygame.K_d:
self.speed_x = 0
elif e.key == pygame.K_LEFT or e.key == pygame.K_a:
self.speed_x = 0
elif e.key == pygame.K_UP or e.key == pygame.K_w:
self.speed_y = 0
elif e.key == pygame.K_DOWN or e.key == pygame.K_s:
self.speed_y = 0
def aprove_movement(self):
self.column = self.intention_column
self.line = self.intention_line
if __name__ == '__main__':
size = 600 // 30
pacman = Pacman(size)
scenary = Scenery(size, pacman)
while True:
# Game Rules
pacman.calculate_rules()
scenary.calculate_rules()
# Figures
window.fill(BLACK)
scenary.paint_scenery(window)
pacman.draw_pacman(window)
pygame.display.update()
pygame.time.delay(100)
events = pygame.event.get()
pacman.calculate_events(events)
SO every time i hold the keys to move for a few seconds the pacman goes over the blue walls of the project, does anyone know why and how to fix it?
Looks like he just teleports to the other sides and than bug the role coordinate system
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Answer
There are 2 issues:
- The
intention_columnandintention_linedepends on the currentcolumeandlineinstead of the previousintention_columnandintention_line.intention_columnandintention_lineare incremented even if there is a wall.columeandlinehowever are only incremented if the movement is possible:
class Pacman:
# [...]
def calculate_rules(self):
# calculate the movimentantion
self.intention_column = self.column + self.speed_x
self.intention_line = self.line + self.speed_y
- Only update
x_centerandy_centerifcolumnorlineare changed:
class Pacman:
# [...]
def aprove_movement(self):
self.column = self.intention_column
self.line = self.intention_line
self.x_center = int( self.column * self.size + self.radius )
self.y_center = int( self.line * self.size + self.radius )
