3_ball_movement.py

import pygame
import os
#################################################
# Basic Initialization (have to)
pygame.init() # Initialize

# Screen Set
screen_width = 640  # 가로
screen_height = 480 # 세로
screen = pygame.display.set_mode((screen_width, screen_height))

# Title
pygame.display.set_caption("Pang") # Game title

# FPS
clock = pygame.time.Clock()
##################################################

# 1. User Game Initialization (BackGround, Images, Graph, Speed, Font etc..)
current_path = os.path.dirname(__file__) # return current file path
image_path = os.path.join(current_path, "Images") # return Images folder file

# background
background = pygame.image.load(os.path.join(image_path, "background.png"))

stage = pygame.image.load(os.path.join(image_path, "stage.png"))
stage_size = stage.get_rect().size
stage_height = stage_size[1]

character = pygame.image.load(os.path.join(image_path, "character.png"))
character_size = character.get_rect().size
character_width = character_size[0]
character_height = character_size[1]
character_x_pos = (screen_width - character_width) // 2
character_y_pos = screen_height - character_height - stage_height

character_to_x = 0

character_speed = 5


weapon = pygame.image.load(os.path.join(image_path, "weapon.png"))
weapon_size = weapon.get_rect().size
weapon_width = weapon_size[0]

# 무기는 한번에 여러발 발사 가능
weapons = []
weapon_speed = 10


ball_images = [
    pygame.image.load(os.path.join(image_path, "balloon1.png")),
    pygame.image.load(os.path.join(image_path, "balloon2.png")),
    pygame.image.load(os.path.join(image_path, "balloon3.png")),
    pygame.image.load(os.path.join(image_path, "balloon4.png"))]

# 공 크기에 따른 최초 스피드
ball_speed_y = [-18, -15, -12, -9]

# 공의 정보
balls = []

balls.append({
    "pos_x" : 50,
    "pos_y" : 50,
    "img_idx" : 0,
    "to_x" : 3,
    "to_y" : -6,
    "init_spd_y" : ball_speed_y[0]})


running = True
while running:
    dt = clock.tick(60) # Set Screen FPS
    # print("FPS : " + str(clock.get_fps()))

    # 2. Event Process (keyboard or mouse)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                character_to_x -= character_speed
            elif event.key == pygame.K_RIGHT:
                character_to_x += character_speed
            elif event.key == pygame.K_SPACE:
                weapon_x_pos = character_x_pos + (character_width / 2) - (weapon_width / 2)
                weapon_y_pos = character_y_pos
                weapons.append([weapon_x_pos, weapon_y_pos])


        if event.type == pygame.KEYUP:
            if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                character_to_x = 0

    # 3. Character Position Def
    character_x_pos += character_to_x

    if character_x_pos < 0:
        character_x_pos = 0
    elif character_x_pos > screen_width - character_width:
        character_x_pos = screen_width - character_width

    # weapon position
    weapons = [ [w[0], w[1] - weapon_speed] for w in weapons]
    weapons = [ [w[0], w[1]] for w in weapons if w[1] > 0]

    # ball position
    for ball_idx, ball_val in enumerate(balls):
        ball_pos_x = ball_val["pos_x"]
        ball_pos_y = ball_val["pos_y"]
        ball_img_idx = ball_val["img_idx"]

        ball_size = ball_images[ball_img_idx].get_rect().size
        ball_width = ball_size[0]
        ball_height = ball_size[1]

        # 벽에 닿았을 떄, 방향 반전
        if ball_pos_x < 0 or ball_pos_x > screen_width - ball_width:
            ball_val["to_x"] *= -1

        # 세로 위치
        if ball_pos_y >= screen_height - stage_height - ball_height:
            ball_val["to_y"] = ball_val["init_spd_y"]
        else:
            ball_val["to_y"] += 0.5

        ball_val["pos_x"] += ball_val["to_x"]
        ball_val["pos_y"] += ball_val["to_y"]

    # 4. Collision Check

    # 5. Print on Screen
    screen.blit(background, (0, 0))
    
    for weapon_x_pos, weapon_y_pos in weapons:
        screen.blit(weapon, (weapon_x_pos, weapon_y_pos))

    for idx, val in enumerate(balls):
        ball_pos_x = val["pos_x"]
        ball_pos_y = val["pos_y"]
        ball_img_idx = val["img_idx"]
        screen.blit(ball_images[ball_img_idx], (ball_pos_x, ball_pos_y))

    screen.blit(character, (character_x_pos, character_y_pos))
    screen.blit(stage, (0, screen_height - stage_height))
    
    pygame.display.update()
    
pygame.quit()