pygam.py

import pygame
from pygame import mixer
import random
import math

# Initialize the pygame
pygame.init()

# create the screen
screen = pygame.display.set_mode((800, 600))  # Width, Height

# Background
background = pygame.image.load('4607345_28021.jpg')

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

# Title and Icon
pygame.display.set_caption("Ninja Game")
icon = pygame.image.load('001-ninja.png')
pygame.display.set_icon(icon)

# Player
playerImg = pygame.image.load('002-raphael.png')
playerX = 50
playerY = 480
playerX_change = 0

# Enemy
enemyImg = []
enemyX = []
enemyY = []
enemyX_change = []
enemyY_change = []
num_of_enemies = 4

for i in range(num_of_enemies):
    enemyImg.append(pygame.image.load('wood.png'))
    enemyX.append(random.randint(0, 736))
    enemyY.append(random.randint(50, 150))
    enemyX_change.append(0.15)
    enemyY_change.append(30)

# Bullet
bulletImg = pygame.image.load('star.png')
bulletX = 0
bulletY = 480
bulletX_change = 0
bulletY_change = 0.5
bullet_state = 'ready'

# Score

score_value = 0
font = pygame.font.Font('freesansbold.ttf', 64)

textX = 10
textY = 10

# Game Over text
over_font = pygame.font.Font('freesansbold.ttf', 132)


def show_score(x, y):
    score = font.render("Score: " + str(score_value), True, (254, 255, 255))
    screen.blit(score, (x, y))


def game_over_text():
    over_text = font.render("GAME OVER", True, (255, 0, 0))
    screen.blit(over_text, (200, 250))


def player(x, y):
    screen.blit(playerImg, (x, y))


def enemy(x, y, i):
    global enemy_state
    enemy_state = 'alive'
    screen.blit(enemyImg[i], (x, y))


def fire_bullet(x, y):
    global bullet_state
    bullet_state = "fire"
    screen.blit(bulletImg, (x + 16, y + 10))
    global bulletX


def isCollision(X1, Y1, X2, Y2):
    distance = math.sqrt(math.pow(X1 - X2, 2) + math.pow(Y1 - Y2, 2))
    if distance < 27:
        return True
    else:
        return False


# Game Loop


running = True
while running:
    screen.blit(background, (0, 0))
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        # if keystroke is pressed check whether its right or left
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                playerX_change = -0.1
            if event.key == pygame.K_RIGHT:
                playerX_change = 0.1
            if event.key == pygame.K_SPACE:
                if bullet_state is "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
    playerX += playerX_change

    if playerX <= 0:
        playerX = 0
    elif playerX >= 736:
        playerX = 736

    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
        if enemyX[i] <= 0:
            enemyX_change[i] = 0.15
            enemyY[i] += enemyY_change[i]
        elif enemyX[i] >= 736:
            enemyX_change[i] = -0.15
            enemyY[i] += enemyY_change[i]
        enemyX[i] += enemyX_change[i]

        # Collision
        collision = isCollision(enemyX[i], enemyY[i], bulletX, bulletY)
        if collision:
            collision_Sound = mixer.Sound('explosion.wav')
            collision_Sound.play()
            bulletY = 480
            bullet_state = "ready"
            score_value += 1
            enemyX[i] = random.randint(0, 736)
            enemyY[i] = random.randint(50, 150)
        enemy(enemyX[i], enemyY[i], i)

    # 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()