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main.py
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import pygame, sys, random
from pygame.math import Vector2
class Snake:
def __init__(self):
self.body = [Vector2(7, 10), Vector2(8, 10), Vector2(9, 10)] # starting snake
self.direction = Vector2(-1, 0)
self.new_block = False
self.head_up = pygame.image.load('Graphics/head_up.png').convert_alpha()
self.head_down = pygame.image.load('Graphics/head_down.png').convert_alpha()
self.head_right = pygame.image.load('Graphics/head_right.png').convert_alpha()
self.head_left = pygame.image.load('Graphics/head_left.png').convert_alpha()
self.tail_up = pygame.image.load('Graphics/tail_up.png').convert_alpha()
self.tail_down = pygame.image.load('Graphics/tail_down.png').convert_alpha()
self.tail_right = pygame.image.load('Graphics/tail_right.png').convert_alpha()
self.tail_left = pygame.image.load('Graphics/tail_left.png').convert_alpha()
self.body_vertical = pygame.image.load('Graphics/body_vertical.png').convert_alpha()
self.body_horizontal = pygame.image.load('Graphics/body_horizontal.png').convert_alpha()
self.body_tr = pygame.image.load('Graphics/body_tr.png').convert_alpha()
self.body_tl = pygame.image.load('Graphics/body_tl.png').convert_alpha()
self.body_br = pygame.image.load('Graphics/body_br.png').convert_alpha()
self.body_bl = pygame.image.load('Graphics/body_bl.png').convert_alpha()
self.sound = pygame.mixer.Sound("Sound/crunch.wav")
def draw_snake(self):
self.update_head()
self.update_tail()
for index, block in enumerate(self.body):
x_pos = block.x * cell_size
y_pos = block.y * cell_size
block_rect = pygame.Rect(x_pos, y_pos, cell_size, cell_size)
if index == 0:
screen.blit(self.head, block_rect)
elif index == len(self.body)-1:
screen.blit(self.tail, block_rect)
else:
previous_block = self.body[index - 1] - block
next_block = self.body[index + 1] - block
if previous_block.x == next_block.x:
screen.blit(self.body_vertical, block_rect)
elif previous_block.y == next_block.y:
screen.blit(self.body_horizontal, block_rect)
else:
if (previous_block.x == -1 and next_block.y == -1) or (previous_block.y == -1 and next_block.x == -1):
screen.blit(self.body_tl, block_rect)
elif(previous_block.x == 1 and next_block.y == 1) or (previous_block.y == 1 and next_block.x == 1):
screen.blit(self.body_br, block_rect)
elif(previous_block.x == 1 and next_block.y == -1) or (previous_block.y == -1 and next_block.x == 1):
screen.blit(self.body_tr, block_rect)
elif(previous_block.x == -1 and next_block.y == 1) or (previous_block.y == 1 and next_block.x == -1):
screen.blit(self.body_bl, block_rect)
def update_head(self):
diff = self.body[1] - self.body[0]
if diff == Vector2(1, 0):
self.head = self.head_left
elif diff == Vector2(-1, 0):
self.head = self.head_right
elif diff == Vector2(0, 1):
self.head = self.head_up
elif diff == Vector2(0, -1):
self.head = self.head_down
def update_tail(self):
diff = self.body[-2] - self.body[-1]
if diff == Vector2(1, 0):
self.tail = self.tail_left
elif diff == Vector2(-1, 0):
self.tail = self.tail_right
elif diff == Vector2(0, 1):
self.tail = self.tail_up
elif diff == Vector2(0, -1):
self.tail = self.tail_down
def move_snake(self):
if self.new_block is True:
body_copy = self.body[:]
body_copy.insert(0, body_copy[0] + self.direction)
self.body = body_copy[:]
self.new_block = False
else:
body_copy = self.body[:-1]
body_copy.insert(0, body_copy[0] + self.direction)
self.body = body_copy[:]
def add_block(self):
self.new_block = True
def play_sound(self):
self.sound.play()
def reset(self):
self.body = [Vector2(5, 10), Vector2(4, 10), Vector2(3, 10)]
self.direction = Vector2(0, 0)
class Fruit:
def __init__(self):
self.x = random.randint(0, cell_num-1)
self.y = random.randint(0, cell_num-1)
self.pos = Vector2(self.x, self.y)
def randomise(self):
self.x = random.randint(0, cell_num - 1)
self.y = random.randint(0, cell_num - 1)
self.pos = Vector2(self.x, self.y)
def draw_fruit(self):
fruit_rect = pygame.Rect(self.pos.x * cell_size, self.pos.y * cell_size, cell_size, cell_size)
# pygame.draw.rect(screen, (126, 166, 114), fruit_rect)
screen.blit(apple, fruit_rect)
# create coordinates to place fruit
# draw square
class Main:
def __init__(self):
self.snake = Snake()
self.fruit = Fruit()
def update(self):
self.snake.move_snake()
self.munch()
self.fail_test()
def draw_elements(self):
self.draw_grass()
self.fruit.draw_fruit()
self.snake.draw_snake()
self.draw_score()
def munch(self):
if self.fruit.pos == self.snake.body[0]:
self.fruit.randomise()
self.snake.add_block()
self.snake.play_sound()
for block in self.snake.body[1:]:
if block == self.fruit.pos:
self.fruit.randomise()
def fail_test(self):
if not (0 <= self.snake.body[0].x <= cell_num) or not (0 <= self.snake.body[0].y <= cell_num):
self.game_over()
for i in self.snake.body[1:]:
if self.snake.body[0] == i:
self.game_over()
def game_over(self):
self.snake.reset()
def draw_grass(self):
grass_colour = (167, 209, 61)
for row in range(cell_num):
if row % 2 == 0:
for col in range(cell_num):
if col % 2 == 0:
grass_rect = pygame.Rect(col*cell_size, row*cell_size, cell_size, cell_size)
pygame.draw.rect(screen, grass_colour, grass_rect)
elif row % 2 == 1:
for col in range(cell_num):
if col % 2 == 1:
grass_rect = pygame.Rect(col*cell_size, row*cell_size, cell_size, cell_size)
pygame.draw.rect(screen, grass_colour, grass_rect)
def draw_score(self):
score_text = str(len(self.snake.body) - 3)
score_surface = game_font.render(score_text, True, (56, 74, 12))
score_x = int(cell_size*cell_num - 60)
score_y = int(cell_size*cell_num - 40)
score_rect = score_surface.get_rect(center=(score_x, score_y))
apple_rect = apple.get_rect(midright=(score_rect.left, score_rect.centery))
bg_rect = pygame.Rect(apple_rect.left, apple_rect.top,apple_rect.width+score_rect.width + 6, apple_rect.height)
pygame.draw.rect(screen, (167, 209, 61), bg_rect)
screen.blit(score_surface, score_rect)
screen.blit(apple, apple_rect)
pygame.draw.rect(screen, (0, 0, 0), bg_rect, 2)
pygame.init()
cell_size = 40
cell_num = 20
screen = pygame.display.set_mode((cell_num*cell_size, cell_num*cell_size))
clock = pygame.time.Clock()
test_surface = pygame.Surface((100, 200))
test_surface.fill((0, 0, 255))
apple = pygame.image.load("Graphics/apple.png").convert_alpha()
game_font = pygame.font.Font("Font/PoetsenOne-Regular.ttf", 25)
SCREEN_UPDATE = pygame.USEREVENT
pygame.time.set_timer(SCREEN_UPDATE, 150)
main_game = Main()
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
if event.type == SCREEN_UPDATE:
main_game.update()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_UP:
if main_game.snake.direction.y != 1:
main_game.snake.direction = Vector2(0, -1)
if event.key == pygame.K_DOWN:
if main_game.snake.direction.y != -1:
main_game.snake.direction = Vector2(0, 1)
if event.key == pygame.K_LEFT:
if main_game.snake.direction.x != 1:
main_game.snake.direction = Vector2(-1, 0)
if event.key == pygame.K_RIGHT:
if main_game.snake.direction.x != -1:
main_game.snake.direction = Vector2(1, 0)
screen.fill((175, 215, 70))
main_game.draw_elements() # draw all elements
pygame.display.update()
clock.tick(60)