SpaceInvaders/main.py at main · jou1993/SpaceInvaders · GitHub

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import  pygame,sys
import math
import random
from pygame import mixer
pygame.init()
# Create the screen
screen=pygame.display.set_mode((800,600))

#Background image
backgroundImg=pygame.image.load("3d-space-scene.jpg")

#Background sound
mixer.music.load('background.wav')
mixer.music.play(-1)

#Set Icon and Title
pygame.display.set_caption("Space Invaders")
icon=pygame.image.load("ufo.png")
pygame.display.set_icon(icon)

#player
playerImg=pygame.image.load("player.png")
playerX=370
playerY=480
playerX_change=0

#enemy
enemyImg=[]
enemyX=[]
enemyY = []
enemyX_change=[]
enemyY_change=[]
num_of_enemies=6

for i in range(num_of_enemies):
    enemyImg.append(pygame.image.load('enemy.png'))
    enemyX.append(random.randint(0, 735))
    enemyY.append(random.randint(50, 150))
    enemyX_change.append( 0.3)
    enemyY_change.append(40)

#bullet
bulletImg=pygame.image.load("bullet.png")
bulletX=370
bulletY=480
bulletX_change=0
bulletY_change=1
bullet_state= "ready"

#score
score_value=0
font=pygame.font.Font('freesansbold.ttf',32)
textX=10
textY=10

#Game Over text
over_font=pygame.font.Font('freesansbold.ttf',64)

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 :" + str(score_value), True, (255, 255, 255))
    screen.blit(over_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 isCollision(enemyX,enemyY,bulletX,bulletY):
    distance=math.sqrt(math.pow(enemyX-bulletX,2) + math.pow(enemyY-bulletY,2))
    return distance < 30

#Game Loop
running=True
while running:
    screen.fill(((0,0,0)))
    #background image
    screen.blit(backgroundImg,(0,0))
    for event in pygame.event.get():
        #if X is pressed
        if event.type == pygame.QUIT:
            running=False
        #if any key is pressed
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                playerX_change -= 0.3
            if event.key == pygame.K_RIGHT:
                playerX_change += 0.3
            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.type == pygame.KEYUP:
            if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                playerX_change = 0


    #enemy movement
    for i in range(num_of_enemies):
        # Game Over
        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[i] = 0
            enemyX_change[i] = 0.3
            enemyY[i] += enemyY_change[i]
        elif enemyX[i] >= 736:
            enemyX[i] = 736
            enemyX_change[i] = -0.3
        # Collision
        collision = isCollision(enemyX[i], enemyY[i], bulletX, bulletY)
        if collision:
            explosion_sound = mixer.Sound('explosion.wav')
            explosion_sound.play()
            bulletY = 480
            bullet_state = "ready"
            score_value += 1
            enemyX[i] = random.randint(0, 735)
            enemyY[i] = random.randint(50, 150)
        enemy(enemyX[i], enemyY[i], i)


    #Check Boundaries
    if playerX <=0 :
        playerX=0
    if playerX >= 736 :
        playerX=736

    #change the position of the player
    playerX += playerX_change

    #bullet movement
    if bulletY <=0 :
        bulletY=480
        bullet_state="ready"
    if bullet_state== "fire"  :
        fire_bullet(bulletX,bulletY)
        bulletY -=bulletY_change


    player(playerX,playerY)
    show_score(textX, textY)
    pygame.display.update()