easycoding.pl [pygame] - jump

easycoding001.py

import os
import pygame

pygame.init()
# super class
class Character:
    # constructor
    def __init__(self, img, x, y, x_change, y_change):
        self.img = img
        self.x = x
        self.y = y
        self.x_change = x_change
        self.y_change = y_change
    # methods
    def draw(self):
        screen.blit(self.img, (self.x, self.y))

# sub class
class Player(Character):
    # constructor
    def __init__(self, img, x, y, x_change, y_change):
        Character.__init__(self, img, x, y, x_change, y_change)
        self.is_jumping = False
    # methods
    def check_borders(self): # prevent from going off the screen
        if self.x > 367: # check right border
            self.x = 367
        elif self.x < 0: # check left border
            self.x = 0

    def jump(self):
        self.img = player_jumping
        if self.y_change >= -0.5:
            self.y -= self.y_change
            self.y_change -= 0.0009
            if self.x > 360: # check right border for jump animation
                self.x = 360
        else:
            self.is_jumping = False
            self.y_change = 0.5
            self.img = player_standing
# sub class
class Bullet(Character):

    # constructor
    def __init__(self, img, x, y, x_change, y_change):
        Character.__init__(self, img, x, y, x_change, y_change)

# CONSTANT variables
WIDTH = 400
HEIGHT = 500
RED = (255, 0, 0)

# website gameart2d to download cool graphics
# how to make path work on every OS (linux/win/ios)
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("CodeLab")

# images
file_name = os.path.join('img', 'background.jpg')
background = pygame.image.load(file_name).convert()
file_name = os.path.join('img', 'jump.png')
player_jumping = pygame.image.load(file_name).convert_alpha()
file_name = os.path.join('img', 'player.png')
player_standing = pygame.image.load(file_name).convert_alpha()

# bullets
first_frame = 0
last_frame = 4
bullets = []
for i in range(last_frame + 1):
    file_name = os.path.join('img', f'bullet_00{i}.png')
    bullets.append(Bullet(pygame.image.load(file_name).convert_alpha(), 0, 0, 0.5, 0.5))

# player
file_name = os.path.join('img', 'player.png')
player = Player(pygame.image.load(file_name).convert_alpha(), 190, 340, 0.3, 0.5)

frame_counter = 0
active_frame = 0
bullet = bullets[active_frame].img

def update_background():
    screen.blit(background, (0, 0))

run = True
while run:
    pygame.time.delay(1)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_SPACE:
                if not player.is_jumping:
                    player.is_jumping = True

    keys = pygame.key.get_pressed()
    if keys[pygame.K_RIGHT]:
        player.x += player.x_change
    if keys[pygame.K_LEFT]:
        player.x -= player.x_change
    if keys[pygame.K_c]: # animate the bullet
        frame_counter = frame_counter + 1
        if frame_counter % 60 == 0:
            active_frame = active_frame + 1
            if active_frame > last_frame:
                active_frame = first_frame
            bullet = bullets[active_frame].img

    # player jumping
    if player.is_jumping:
        player.jump()

    update_background()
    player.draw()
    player.check_borders()
    screen.blit(bullet, (0, -10)) # draw bullet
    pygame.display.update()

pygame.quit()