So I am trying to make a space-invaders game, and decided to have a missile weapon that would have a trigger. If you didn't hit the trigger, whatever alien it hit died and nothing else. If you do trigger it, the code would teleport the missile away and replace it with an explosion image. anything within the image would die. However, while the detonation button works and only one alien dies when it doesn't detonate, the detonation does not summon the explosion image, or do anything to the aliens. The missile just disappears and plays the detonation noise.
This is my code:
import pygame
from pygame import mixer
import random
import math
import time
pygame.init()
screen = pygame.display.set_mode((800, 600))
explosion_Sound = mixer.Sound('explosion.wav')
background = pygame.image.load('Background.jpg')
background = pygame.transform.scale(background, (800, 600))
mixer.music.load('background.wav')
mixer.music.play(-1)
pygame.display.set_caption("Space Invaders")
icon = pygame.image.load('ufo.png')
pygame.display.set_icon(icon)
playerImg = pygame.image.load('spaceship.png')
playerX = 370
playerY = 480
playerX_change = 0
enemyImg = []
enemyX = []
enemyY = []
enemyX_change = []
enemyY_change = []
num_of_enemies = 6
for i in range(num_of_enemies):
enemyImg.append(pygame.image.load('ufo.png'))
enemyX.append(random.randint(0, 750))
enemyY.append(random.randint(50, 200))
enemyX_change.append(0.5)
enemyY_change.append(40)
bulletImg = pygame.image.load('bullet.png')
bulletX = 0
bulletY = 480
bulletX_change = 0
bulletY_change = 1
bullet_state = "ready"
missileImg = pygame.image.load('missile.png')
missileX = 0
missileY = 0
missileX_change = 0
missileY_change = 0.7
missile_state = "ready"
explosionImg = pygame.image.load('explosion.png')
explosionX = missileX
explosionY = missileY
explosionX_change = 0
explosionY_change = 0
explosion_state = "ready"
score_value = 34
font = pygame.font.Font('freesansbold.ttf', 32)
textX = 10
textY = 10
over_font = pygame.font.Font('freesansbold.ttf', 64)
level_up_font = pygame.font.Font('freesansbold.ttf', 64)
instructions = pygame.font.Font('freesansbold.ttf', 32)
def missile_instructions():
instruction = instructions.render("Press the M key to shoot missile", True, (255, 255, 255))
screen.blit(instruction, (200, 350))
def show_score(x,y):
score = font.render("Score : " + str(score_value), True, (255, 255, 255))
screen.blit(score, (x,y))
def game_over_text():
over_text = over_font.render("GAME OVER", True, (255, 255, 255))
screen.blit(over_text, (200, 250))
def level_up():
levelup_text = level_up_font.render("LEVEL UP!", True, (255, 255, 255))
screen.blit(levelup_text, (200, 250))
def player(x,y):
screen.blit(playerImg,(x, y))
def enemy(x,y, i):
screen.blit(enemyImg[i],(x,y))
def fire_bullet(x,y):
global bullet_state
bullet_state = "fire"
screen.blit(bulletImg,(x + 16, y + 10))
def fire_missile(x,y):
global missile_state
missile_state = "fire"
screen.blit(missileImg, (x + 16, y + 10))
def explosion(x,y):
global explosion_state
explosion_state = "fire"
screen.blit(explosionImg, (x,y))
def create_enemies(new_enemies):
global num_of_enemies
enemy_image = pygame.image.load('ufo.png')
for i in range(new_enemies):
enemyImg.append(enemy_image)
enemyX.append(random.randint(0, 750))
enemyY.append(random.randint(50, 200))
enemyX_change.append(0.5)
enemyY_change.append(40)
num_of_enemies += new_enemies
def isCollision(enemyX, enemyY, bulletX, bulletY):
distance = math.sqrt((math.pow(enemyX-bulletX,2)) + (math.pow(enemyY-bulletY,2)))
if distance < 27:
return True
else:
return False
def isCollision2(enemyX, enemyY, missileX, missileY):
distance2 = math.sqrt((math.pow(enemyX-missileX,2)) + (math.pow(enemyY-missileY,2)))
if distance2 < 27:
return True
else:
return False
def isCollision3(enemyX, enemyY, explosionX, explosionY):
distance3 = math.sqrt((math.pow(enemyX-explosionX,2)) + (math.pow(enemyY-explosionY, 2)))
if distance3 < 128:
return True
else:
return False
running = True
while running:
screen.fill((0, 0, 0))
screen.blit(background,(0,0))
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
running = False
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.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
playerX_change = 0
if event.key == pygame.K_SPACE:
if bullet_state == "ready":
bullet_sound = mixer.Sound('laser.wav')
bullet_sound.play()
bulletX = playerX
fire_bullet(bulletX,bulletY)
if event.key == pygame.K_m:
if score_value >= 35:
if missile_state == "ready":
missile_sound = mixer.Sound('laser.wav')
missile_sound.play()
missileX = playerX
fire_missile(missileX,missileY)
if event.key == pygame.K_n:
if score_value >= 35:
if missile_state == "fire":
explosion_state = "fire"
explosion_Sound.play()
explosionX = missileX
explosionY = missileY
missile_state = "ready"
missileX = bulletX
missileY = bulletY
playerX += playerX_change
if playerX <= 0:
playerX = 0
elif playerX >= 768:
playerX = 768
for i in range(num_of_enemies):
if enemyY[i] > 440:
for j in range(num_of_enemies):
enemyY[j] = 2000
game_over_text()
break
enemyX[i] += enemyX_change[i]
if enemyX[i] <= 0:
enemyX_change[i] = 0.5
enemyY[i] += enemyY_change[i]
elif enemyX[i] >= 768:
enemyX_change[i] = -0.5
enemyY[i] += enemyY_change[i]
collision = isCollision(enemyX[i], enemyY[i], bulletX, bulletY)
if collision:
explosion_Sound.play()
bulletY = 480
bullet_state = "ready"
score_value += 1
print(f"score = {score_value}")
enemyX[i] = random.randint(50, 768)
enemyY[i] = random.randint(50, 200)
collision2 = isCollision2(enemyX[i], enemyY[i], missileX, missileY)
if collision2:
explosion_Sound = mixer.Sound('explosion.wav')
explosion_Sound.play()
missileY = 480
missile_state = "ready"
score_value += 1
print(f"score = {score_value}")
enemyX[i] = random.randint(50, 768)
enemyY[i] = random.randint(50, 200)
enemy(enemyX[i], enemyY[i], i)
if bulletY <= 0:
bulletY = 480
bullet_state = "ready"
if bullet_state == "fire":
fire_bullet(bulletX,bulletY)
bulletY -= bulletY_change
if missileY <= 0:
missileY = 480
missile_state = "ready"
if missile_state == "fire":
fire_missile(missileX, missileY)
missileY -= missileY_change
player(playerX, playerY)
show_score(textX, textY)
if score_value == 20:
create_enemies(4)
score_value += 1
if score_value == 21:
level_up()
if score_value == 35:
level_up()
missile_instructions()
if score_value == 50:
create_enemies(5)
score_value += 1
if score_value == 51:
level_up()
pygame.display.update()
I don't receive any error messages, and the game doesn't crash, it simply continues as if the missile was never there, and the missile is also available for use as soon as it has been detonated.
