Catford Coding Club Course Resource

Python Platformer code

Here's all the code for the platform game, so if you're unable to see the bit you need on the projector, you can look here instead. You'll notice that you can't copy and paste it. That's a good thing, because if you do, you:
a) won't learn anything, and
b) will likely break your code.
But, if you're struggling to keep up, and because it's the last week, give me a shout and I might just show you how to cheat ; )
More helpfully, Chris has put a guide to each week's lessons and objectives here, along with all the code as it should be at the end of each week.

import pgzrun
from platformer import*

# platformer constants
TILE_SIZE = 18
ROWS = 30
COLS = 20

# pygame constants
WIDTH = TILE_SIZE * ROWS
HEIGHT = TILE_SIZE * COLS
TITLE = "FOXY LADY"

# build world
platforms = build("platformer_platforms.csv", TILE_SIZE)
_keys     = build("platformer_keys.csv", TILE_SIZE)
hearts    = build("platformer_hearts.csv", TILE_SIZE)
obstacles = build("platformer_obstacles.csv", TILE_SIZE)
backgrounds = build("platformer_backgrounds.csv", TILE_SIZE)

# define sprites
color_key = (0,0,0)
fox_stand = Sprite("fox.png",(0,32,32,32),14,color_key,30)
fox_walk = Sprite("fox.png",(0,64,32,32),8,color_key,5)

# define player actor
#player = Actor("p_right")
player = SpriteActor(fox_stand)
player.bottomleft = (0, HEIGHT - TILE_SIZE)

# define player specific variables
player.velocity_x = 3
player.velocity_y = 0
player.health = 5
player.jumping = False
player.alive = True

# define global variables
gravity = 0.6
jump_velocity = -10

game_state = "Menu"

def draw_game():
    # clear screen and draw sky background
    screen.clear()
    screen.fill("skyblue")
    
    # draw all backgrounds
    for background in backgrounds:
        background.draw()
    # draw all platforms
    for platform in platforms:
        platform.draw()
    # draw all keys
    for _key in _keys:
        _key.draw()
    # draw all hearts
    for heart in hearts:
        heart.draw()
    # draw all obstacles
    for obstacle in obstacles:
        obstacle.draw()
    
    # draw the player
    if player.alive:
        player.draw()
    
    health_string = "Health: " + str(player.health)
    screen.draw.text(health_string,(3*WIDTH/4,0),fontname="atop",fontsize=20,color="darkred")

def draw_menu():
    # clear screen and draw sky background
    screen.clear()
    screen.fill("skyblue")
    screen.draw.text("Foxy Lady",center=(WIDTH/2,HEIGHT/2),fontname="atop",fontsize=60,color="darkred")
    screen.draw.text("Press S to Start",center=(WIDTH/2,64 + HEIGHT/2),fontname="atop",fontsize=20,color="darkred")

def draw_over():
    screen.clear()
    screen.fill("skyblue")
    screen.draw.text("Game Over !",center=(WIDTH/2,HEIGHT/2),fontname="atop",fontsize=60,color="darkred")
    screen.draw.text("Press S to Start",center=(WIDTH/2,64 + HEIGHT/2),fontname="atop",fontsize=20,color="darkred")

def draw_win():
    screen.clear()
    screen.fill("skyblue")
    screen.draw.text("You Win !",center=(WIDTH/2,HEIGHT/2),fontname="atop",fontsize=60,color="darkred")
    screen.draw.text("Press S to Start",center=(WIDTH/2,64 + HEIGHT/2),fontname="atop",fontsize=20,color="darkred")


def draw():
    global game_state

    if   game_state == "Menu":
        draw_menu()
    elif game_state == "Game":
        draw_game()
    elif game_state == "Over":
        draw_over()
    elif game_state == "Win":
        draw_win()

def update_game():
    global game_state
    # handle left movement
    if keyboard.left and player.midleft[0] > 0:
        player.x -= player.velocity_x
        # player.image="p_left"
        player.sprite=fox_walk
        player.flip_x = True
        # # handle collision with the platform
        if player.collidelist(platforms) != -1:
            # get object that the player collided with
            object = platforms[player.collidelist(platforms)]
            #player.velocity_y = 0
            player.x += player.velocity_x
            #player.y = object.y - object.height/2 - player.height/2
    
    # handle right movement
    elif keyboard.right and player.midright[0] < WIDTH:
        player.x += player.velocity_x
        # player.image="p_right"
        player.sprite = fox_walk
        player.flip_x = False
        # handle collision with the platform
        if player.collidelist(platforms) != -1:
            # get object that the player collided with
            object = platforms[player.collidelist(platforms)]
            #player.velocity_y = 0
            player.x -= player.velocity_x
            #player.y = object.y - object.height/2 - player.height/2
    
    # handle gravity
    player.y += player.velocity_y
    player.velocity_y += gravity

    # handle collision with platforms
    if player.collidelist(platforms) != -1:
            # get object that the player collided with
            object = platforms[player.collidelist(platforms)]
            # moving down -> hit the ground
            if player.velocity_y >= 0:
                player.y = object.y - object.height/2 - player.height/2
                player.jumping = False
            # moving up -> hit their head
            else:
                player.y = object.y + object.height/2 + player.height/2
            player.velocity_y = 0

    # handle collision with the obstacles
    if player.collidelist(obstacles) != -1:
        player.alive=False
        clock.unschedule(reduce_health)
        music.stop()
        sounds.hero_dies.play()
        game_state = "Over"
        

    # handle collision with the hearts
    if player.collidelist(hearts) != -1:
        # get heart that the player collided with
        object = hearts[player.collidelist(hearts)]
        hearts.remove(object)
        player.health += 1
        sounds.health.play()
    
    # handle collision with the keys
    if player.collidelist(_keys) != -1:
        # get heart that the player collided with
        object = _keys[player.collidelist(_keys)]
        _keys.remove(object)

    if len(_keys) == 0:
        clock.unschedule(reduce_health)
        music.stop()
        sounds.magic.play()
        game_state = "Win"

    if player.health <= 0:
        music.stop()
        sounds.alarm.stop()
        sounds.hero_dies.play()
        game_state = "Over"
    elif player.health < 3:
        sounds.alarm.set_volume(0.2)
        sounds.alarm.play()

def update_menu():
    global game_state
    
    if keyboard.S:
        reset_game()
        game_state = "Game"

def update_over():
    global game_state
    
    if keyboard.S:
        reset_game()
        game_state = "Game"

def update_win():
    global game_state

    if keyboard.S:
        reset_game()
        game_state = "Game"

def update():
    global game_state

    if game_state == "Game":
        update_game()
    elif game_state == "Menu":
        update_menu()
    elif game_state == "Over":
        update_over()
    elif game_state == "Win":
        update_win()

def on_key_down(key):
    global game_state
    if key == keys.SPACE and not player.jumping and game_state == "Game":
        player.velocity_y = jump_velocity
        player.jumping = True
        sounds.jump.set_volume(0.2)
        sounds.jump.play()

def on_key_up(key):
    global game_state
    if key == keys.LEFT or key == keys.RIGHT and game_state == "Game":
        player.sprite = fox_stand

def reduce_health():
    player.health -= 1

def reset_game():
    global _keys, hearts
    player.bottomleft = (0, HEIGHT - TILE_SIZE)
    player.velocity_x = 3
    player.velocity_y = 0
    player.health = 5
    player.jumping = False
    player.alive = True
    _keys      = build("platformer_keys.csv", TILE_SIZE)
    hearts    = build("platformer_hearts.csv", TILE_SIZE)
    clock.unschedule(reduce_health)
    clock.schedule_interval(reduce_health, 3)
    music.play("sneaking_around")

pgzrun.go()
CourseResource

Python Platformer code

Course
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