Welcome folks today in this blog post we will be building a chrome dinosaur game in python using pygame library. All the full source code of the application is given below.
Get Started
In order to get started you need to install the following libraries using the pip command as shown below
pip install pygame
After installing this library you need to make an main.py file and copy paste the following code
main.py
import pygame
import os
import random
pygame.init()
# Global Constants
SCREEN_HEIGHT = 600
SCREEN_WIDTH = 1100
SCREEN = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
RUNNING = [pygame.image.load(os.path.join("Assets/Dino", "DinoRun1.png")),
pygame.image.load(os.path.join("Assets/Dino", "DinoRun2.png"))]
JUMPING = pygame.image.load(os.path.join("Assets/Dino", "DinoJump.png"))
DUCKING = [pygame.image.load(os.path.join("Assets/Dino", "DinoDuck1.png")),
pygame.image.load(os.path.join("Assets/Dino", "DinoDuck2.png"))]
SMALL_CACTUS = [pygame.image.load(os.path.join("Assets/Cactus", "SmallCactus1.png")),
pygame.image.load(os.path.join("Assets/Cactus", "SmallCactus2.png")),
pygame.image.load(os.path.join("Assets/Cactus", "SmallCactus3.png"))]
LARGE_CACTUS = [pygame.image.load(os.path.join("Assets/Cactus", "LargeCactus1.png")),
pygame.image.load(os.path.join("Assets/Cactus", "LargeCactus2.png")),
pygame.image.load(os.path.join("Assets/Cactus", "LargeCactus3.png"))]
BIRD = [pygame.image.load(os.path.join("Assets/Bird", "Bird1.png")),
pygame.image.load(os.path.join("Assets/Bird", "Bird2.png"))]
CLOUD = pygame.image.load(os.path.join("Assets/Other", "Cloud.png"))
BG = pygame.image.load(os.path.join("Assets/Other", "Track.png"))
class Dinosaur:
X_POS = 80
Y_POS = 310
Y_POS_DUCK = 340
JUMP_VEL = 8.5
def __init__(self):
self.duck_img = DUCKING
self.run_img = RUNNING
self.jump_img = JUMPING
self.dino_duck = False
self.dino_run = True
self.dino_jump = False
self.step_index = 0
self.jump_vel = self.JUMP_VEL
self.image = self.run_img[0]
self.dino_rect = self.image.get_rect()
self.dino_rect.x = self.X_POS
self.dino_rect.y = self.Y_POS
def update(self, userInput):
if self.dino_duck:
self.duck()
if self.dino_run:
self.run()
if self.dino_jump:
self.jump()
if self.step_index >= 10:
self.step_index = 0
if userInput[pygame.K_UP] and not self.dino_jump:
self.dino_duck = False
self.dino_run = False
self.dino_jump = True
elif userInput[pygame.K_DOWN] and not self.dino_jump:
self.dino_duck = True
self.dino_run = False
self.dino_jump = False
elif not (self.dino_jump or userInput[pygame.K_DOWN]):
self.dino_duck = False
self.dino_run = True
self.dino_jump = False
def duck(self):
self.image = self.duck_img[self.step_index // 5]
self.dino_rect = self.image.get_rect()
self.dino_rect.x = self.X_POS
self.dino_rect.y = self.Y_POS_DUCK
self.step_index += 1
def run(self):
self.image = self.run_img[self.step_index // 5]
self.dino_rect = self.image.get_rect()
self.dino_rect.x = self.X_POS
self.dino_rect.y = self.Y_POS
self.step_index += 1
def jump(self):
self.image = self.jump_img
if self.dino_jump:
self.dino_rect.y -= self.jump_vel * 4
self.jump_vel -= 0.8
if self.jump_vel < - self.JUMP_VEL:
self.dino_jump = False
self.jump_vel = self.JUMP_VEL
def draw(self, SCREEN):
SCREEN.blit(self.image, (self.dino_rect.x, self.dino_rect.y))
class Cloud:
def __init__(self):
self.x = SCREEN_WIDTH + random.randint(800, 1000)
self.y = random.randint(50, 100)
self.image = CLOUD
self.width = self.image.get_width()
def update(self):
self.x -= game_speed
if self.x < -self.width:
self.x = SCREEN_WIDTH + random.randint(2500, 3000)
self.y = random.randint(50, 100)
def draw(self, SCREEN):
SCREEN.blit(self.image, (self.x, self.y))
class Obstacle:
def __init__(self, image, type):
self.image = image
self.type = type
self.rect = self.image[self.type].get_rect()
self.rect.x = SCREEN_WIDTH
def update(self):
self.rect.x -= game_speed
if self.rect.x < -self.rect.width:
obstacles.pop()
def draw(self, SCREEN):
SCREEN.blit(self.image[self.type], self.rect)
class SmallCactus(Obstacle):
def __init__(self, image):
self.type = random.randint(0, 2)
super().__init__(image, self.type)
self.rect.y = 325
class LargeCactus(Obstacle):
def __init__(self, image):
self.type = random.randint(0, 2)
super().__init__(image, self.type)
self.rect.y = 300
class Bird(Obstacle):
def __init__(self, image):
self.type = 0
super().__init__(image, self.type)
self.rect.y = 250
self.index = 0
def draw(self, SCREEN):
if self.index >= 9:
self.index = 0
SCREEN.blit(self.image[self.index//5], self.rect)
self.index += 1
def main():
global game_speed, x_pos_bg, y_pos_bg, points, obstacles
run = True
clock = pygame.time.Clock()
player = Dinosaur()
cloud = Cloud()
game_speed = 20
x_pos_bg = 0
y_pos_bg = 380
points = 0
font = pygame.font.Font('freesansbold.ttf', 20)
obstacles = []
death_count = 0
def score():
global points, game_speed
points += 1
if points % 100 == 0:
game_speed += 1
text = font.render("Points: " + str(points), True, (0, 0, 0))
textRect = text.get_rect()
textRect.center = (1000, 40)
SCREEN.blit(text, textRect)
def background():
global x_pos_bg, y_pos_bg
image_width = BG.get_width()
SCREEN.blit(BG, (x_pos_bg, y_pos_bg))
SCREEN.blit(BG, (image_width + x_pos_bg, y_pos_bg))
if x_pos_bg <= -image_width:
SCREEN.blit(BG, (image_width + x_pos_bg, y_pos_bg))
x_pos_bg = 0
x_pos_bg -= game_speed
while run:
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
SCREEN.fill((255, 255, 255))
userInput = pygame.key.get_pressed()
player.draw(SCREEN)
player.update(userInput)
if len(obstacles) == 0:
if random.randint(0, 2) == 0:
obstacles.append(SmallCactus(SMALL_CACTUS))
elif random.randint(0, 2) == 1:
obstacles.append(LargeCactus(LARGE_CACTUS))
elif random.randint(0, 2) == 2:
obstacles.append(Bird(BIRD))
for obstacle in obstacles:
obstacle.draw(SCREEN)
obstacle.update()
if player.dino_rect.colliderect(obstacle.rect):
pygame.time.delay(2000)
death_count += 1
menu(death_count)
background()
cloud.draw(SCREEN)
cloud.update()
score()
clock.tick(30)
pygame.display.update()
def menu(death_count):
global points
run = True
while run:
SCREEN.fill((255, 255, 255))
font = pygame.font.Font('freesansbold.ttf', 30)
if death_count == 0:
text = font.render("Press any Key to Start", True, (0, 0, 0))
elif death_count > 0:
text = font.render("Press any Key to Restart", True, (0, 0, 0))
score = font.render("Your Score: " + str(points), True, (0, 0, 0))
scoreRect = score.get_rect()
scoreRect.center = (SCREEN_WIDTH // 2, SCREEN_HEIGHT // 2 + 50)
SCREEN.blit(score, scoreRect)
textRect = text.get_rect()
textRect.center = (SCREEN_WIDTH // 2, SCREEN_HEIGHT // 2)
SCREEN.blit(text, textRect)
SCREEN.blit(RUNNING[0], (SCREEN_WIDTH // 2 - 20, SCREEN_HEIGHT // 2 - 140))
pygame.display.update()
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
if event.type == pygame.KEYDOWN:
main()
menu(death_count=0)
Now for downloading all the images of the game you can download the full source code of the game from the below github respository
Now if you run the main.py file by typing the below command
python main.py
