import pygame
import random
# get the window
pygame.init
# window var declarataion and parameters
window = pygame.display.set_mode((800, 600))
background = pygame.image.load("space bg.png")
# characters
# spaceship
playerImg = pygame.image.load("spaceship-2.png")
playerX = 360
playerY = 535
playerX_change = 0
#enemy
enemyImg = pygame.image.load("space-invaders.png")
enemyX = random.randint(0, 536)
enemyY = random.randint(0, 120)
enemyX_change = 1
enemyY_change = 30
#bullet
bulletImg = pygame.image.load("space-invaders.png")
bulletX = playerX
bulletY = 535
bulletX_change = 0
bulletY_change = -100
bullet_state = "ready"
# character functions
#spaceship
def player(x, y):
window.blit(playerImg, (playerX, playerY))
def enemy(x, y):
window.blit(enemyImg, (enemyX, enemyY))
def fire_bullet(x, y):
global bullet_state
if bullet_state == "fire":
window.blit(bulletImg, (playerX + 16, playerY + 10))
# full loop
running = True
while running:
# to change the color of window
window.fill((255, 255, 255))
window.blit(background, (0, 0))
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
# check if key pressed is right or left and executes events accordingly
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
playerX_change = -1
if event.key == pygame.K_RIGHT:
playerX_change = 1
if event.key == pygame.K_SPACE:
fire_bullet(playerX, bulletY)
bulletY -= bulletY_change
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
playerX_change = 0
# enemy movement
# loops the enemy movement
enemyX += enemyX_change
# to change the enemy direction when border of window hit
if enemyX <= 0:
enemyY += enemyY_change
enemyX_change = 1
elif enemyX >= 736:
enemyY += enemyY_change
enemyX_change = -1
# calling function
playerX += playerX_change
if playerX <= 0:
playerX = 0
elif playerX >= 736:
playerX = 736
player(playerX, playerY)
enemy(enemyX, enemyY)
pygame.display.update()
i tried to make the bullet move along the y axis of the spaceship by adding the code shown below into the keystroke code section:
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
playerX_change = -1
if event.key == pygame.K_RIGHT:
playerX_change = 1
if event.key == pygame.K_SPACE:
fire_bullet(playerX, bulletY)
bulletY -= bulletY_change
but no error message is shown, the bullet is not being shown, but everything else works perfectly.. like the invader moving along the x axis infinitely, and the spaceship can still be controlled by my arrow key.. only thing that doesn't work is the bullet not firing from the spaceship.. and I can't seem to make it work with this code.. if someone could tell me where I went wrong, it would be of tons of help, and I've been on this problem for days now.. so it would save me a lot of time in the future. thanks
