On 07/16/2013 01:29 PM, Daniel Kersgaard wrote:
I'm having a little trouble, tried Googling it, but to no avail. Currently, I'm
working on making a snake game, however I'm stuck on a simple border. The only
thing I need help with is when you run the program, the bottom right corner of
the border is missing. I'm not sure why. And I know I'm no where near finished,
I've simply got a wall, and a randomly placed piece of food. A classmate
mentioned increasing the BLOCK_SIZE variable in the width for loop, but that
simply moved the top and bottom walls over one pixel. I'm stuck, and any help
would be greatly appreciated! And I'm not sure if there is a better or easier
way of providing my code, so I just pasted it below.
import pygame as pg
import random as rnd
import sys
#define colors using rgb
RED = (255,0,0)
RED_DARK = (150,0,0)
GREEN = (0,255,0)
GREEN_DARK = (0,150,0)
BLUE = (0,0,255)
BLUE_DARK = (0,0,150)
WHITE = (255,255,255)
BLACK = (0,0,0)
#block size
BLOCK_SIZE = 30
#play area and game speed
WIDTH = 25
HEIGHT = 25
SPEED = 8
SPEED_TICK =2
SPEED_NIC = 5
SHORT = 12
LONG = 1
UP = 0
DOWN = 1
LEFT = 2
RIGHT = 3
class food:
#class constructor
def __init__(self, surface, min_xcord, max_xcord, min_ycord, max_ycord):
self.surface = surface
self.min_xcord = min_xcord
self.max_xcord = max_xcord
self.min_ycord = min_ycord
self.max_ycord = max_ycord
self.apple = pg.Surface((BLOCK_SIZE, BLOCK_SIZE))
self.apple.set_alpha(255)
self.apple.fill(RED)
#get food position
def getPosition(self):
return (rnd.randint(self.min_xcord, self.max_xcord),
rnd.randint(self.min_ycord, self.max_ycord))
#draw the food on the play area
def draw(self):
position = self.getPosition()
self.surface.blit(self.apple, (position[0] * BLOCK_SIZE, position[1] *
BLOCK_SIZE))
def drawWalls(surface):
# create wall block
wallblock = pg.Surface((BLOCK_SIZE, BLOCK_SIZE))
wallblock.set_alpha(255)
wallblock.fill(BLUE)
#left and right walls
for y in range(HEIGHT):
surface.blit(wallblock, (0, y * BLOCK_SIZE))
surface.blit(wallblock, (WIDTH * BLOCK_SIZE, y * BLOCK_SIZE))
for x in range(WIDTH):
surface.blit(wallblock, (x * BLOCK_SIZE, 0))
surface.blit(wallblock, (x * BLOCK_SIZE, HEIGHT * BLOCK_SIZE))
Two things wrong here. One is that your lines are zero based and
therefore they don't fill the far end, and other is that you draw the
horizontal lines many times.
#left and right walls
for y in range(HEIGHT):
surface.blit(wallblock, (0, y * BLOCK_SIZE))
surface.blit(wallblock, (WIDTH * BLOCK_SIZE, (y+1) * BLOCK_SIZE))
#top and bottom walls
wallblock.fill(GREEN) #REMOVE ME
for x in range(WIDTH):
surface.blit(wallblock, ((x+1) * BLOCK_SIZE, 0))
surface.blit(wallblock, (x * BLOCK_SIZE, HEIGHT * BLOCK_SIZE))
What I did here was to (temporarily) color the top and bottom walls
GREEN instead of BLUE, and you can better see what happens. I also
fixed two of the walls to start at 1 instead of zero. And unindented
the latter code so it only displays once.
Once you see what it's doing, you probably want to remove the line that
I labelled "REMOVE ME"
pg.display.flip()
def main():
#initalize pygame
pg.init()
#initalize the main screen, screen is 'pygame.Surface'
screen = pg.display.set_mode(((WIDTH + 1) * BLOCK_SIZE, (HEIGHT + 1) *
BLOCK_SIZE))
screen.fill(BLACK)
drawWalls(screen)
myfood = food(screen, 1, 24, 1, 24)
myfood.draw()
pg.display.flip()
main()
--
DaveA
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