CODEWITHSUNDEEP
pythonpygamegame-development
Salmon
Salmon

Reputation: 31

Apple won't disappear when my snake is touching it

This is my first post! I am trying to make a snake clone in Pygame, but when my snake touches the apple, it won't teleport to another place. Here's my code:

import pygame          
import time
import random

pygame.init()          

wh = (255,255,255)     #white
bk = (0,0,0)           #black
ylw = (255,255,0)      #yellow 
prpl = (127,0,127)     #purple

snakeXChange = 0
snakeYChange = 0
dWidth = 800
dHeight = 600 
clock = pygame.time.Clock()
fps = 25
blockSize = 15
appleX = round(random.randrange(0, dWidth - blockSize)/ 10.0)* 10.0
appleY = round(random.randrange(0, dHeight - blockSize) / 10.0)* 10.0
snakeX = dWidth / 2           
snakeY = dHeight / 2          
font = pygame.font.SysFont(None, 25)
def message(msg, color):
    screenText = font.render(msg, True, color)
    gameDisplay.blit(screenText, [dWidth / 2, dHeight / 2])

gameDisplay = pygame.display.set_mode((dWidth,dHeight))     
pygame.display.set_caption('Snek')                   #shoutout to Hopson


gameExit = False                                    
gameOver = False


while not gameExit:                                  
    for event in pygame.event.get():                 
        if event.type == pygame.QUIT:                
            gameExit = True                         
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                snakeXChange = -blockSize
                snakeYChange = 0
            if event.key == pygame.K_RIGHT:
                snakeXChange = blockSize
                snakeYChange = 0
            if event.key == pygame.K_UP:
                snakeYChange = -blockSize
                snakeXChange = 0
            if event.key == pygame.K_DOWN:
                snakeYChange = blockSize
                snakeXChange = 0


    snakeX += snakeXChange

    snakeY += snakeYChange

    gameDisplay.fill(prpl)                          

    pygame.draw.rect(gameDisplay, wh, [snakeX,snakeY,blockSize,blockSize])  #snake

    pygame.draw.rect(gameDisplay, ylw, [appleX,appleY,blockSize,blockSize]) #apple

    if snakeX == appleX and snakeY == appleY:
        appleX = round(random.randrange(0, dWidth - blockSize)/ 10.0)* 10.0
        appleY = round(random.randrange(0, dHeight - blockSize) / 10.0)* 10.0

    clock.tick(fps)

    pygame.display.update()  

message("GAME OVER NIBBA", ylw)
pygame.display.update()                              #updates the display
time.sleep(5)
pygame.quit()                                        
quit()

Original source: https://paste.ee/p/eSimt

I am following theNewBoston's tutorials as a reference.

Cheers

SalmonSan

Upvotes: 3

Views: 146

Answers (1)

skrx
skrx

Reputation: 20478

You're rounding the appleX and appleY coordinates to the nearest multiple of 10, but move in steps of 15 px, and that means it can happen that the snake isn't able to touch the apple. For example the appleX could be 410 and the snake starts at 400, so it would never be able to reach the apple.

Just round all positions to the nearest multiple of 15 (the blockSize and speed):

appleX = round(random.randrange(0, dWidth - blockSize) / 15.0) * 15.0
appleY = round(random.randrange(0, dHeight - blockSize) / 15.0) * 15.0
snakeX = round(dWidth / 2. / 15.) * 15
snakeY = round(dHeight / 2. / 15.) * 15

You could also just pass 15 as the step argument to random.randrange to get a random multiple of 15.

appleX = random.randrange(0, dWidth-blockSize, 15)

It would also be possible to use pygame.Rects for the collision detection and to store the coordinates.

Upvotes: 3

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