Listing_10-1_formatted.py

tramel-formatted.py

# Listing_10-1.py
# Copyright Warren Sande, 2009
# Released under MIT license http://www.opensource...
# Version 61 ----------------------------

# Very simple skiing game.
# Avoid the trees and pick up flags to get points

import pygame, sys, random

# different images for the skier depending on his direction
skier_images = ["skier_down.png", "skier_right1.png", "skier_right2.png",
"skier_left2.png", "skier_left1.png"]

# class for the skier sprite
class SkierClass(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.image.load("worms.jpg")
        self.rect = self.image.get_rect()
        self.rect.center = [320, 100]
        self.angle = 0

    def turn(self, direction): 
        # load new image and change speed when the skier turns
        self.angle = self.angle + direction
        if self.angle < -2:
            self.angle = -2
        if self.angle > 2:
            self.angle = 2 
        center = self.rect.center
        self.image = pygame.image.load(skier_images[self.angle])
        self.rect = self.image.get_rect()
        self.rect.center = center
        speed = [self.angle, 6 - abs(self.angle) * 2]
        return speed

    def move(self, speed):
        # move the skier right and left
        self.rect.centerx = self.rect.centerx + speed[0]
        if self.rect.centerx < 20:
            self.rect.centerx = 20
        if self.rect.centerx > 620:
            self.rect.centerx = 620 

# class for obstacle sprites (trees and flags)
class ObstacleClass(pygame.sprite.Sprite):
    def __init__(self, image_file, location, type):
        pygame.sprite.Sprite.__init__(self)
        self.image_file = image_file
        self.image = pygame.image.load(image_file)
        self.rect = self.image.get_rect()
        self.rect.center = location
        self.type = type
        self.passed = False
        def update(self):
            global speed
        self.rect.center -= speed[1]
        if self.rect.center < -32:
            self.kill()

    def scroll(self, terrainPos):
        self.rect.centery = self.location[1] - terrainPos

    # create one "screen" of terrain: 640 x 640
    # use "blocks" of 64 x 64 pixels, so objects aren't too close together
def create_map():
    global obstacles
    locations = []
    for i in range(10):
        row = random.randint(0, 9)
        col = random.randint(0, 9)
        location = [col * 64 + 20, row * 64 + 2 + 640]
    if not (location in locations):
        locations.append(location)
    type = random.choice(["tree", "flag"])
    if type == "tree":
        img = "before.jpg"
    elif type == "flag":
        img = "complete.jpg"
    obstacle = ObstacleClass(img, location, type)
    obstacles.add(obstacle)

# redraw the screen, including all sprites
def animate():
    screen.fill([255, 255, 255])
    pygame.display.update(obstacles.draw(screen)) 
    screen.blit(skier.image, skier.rect)
    screen.blit(score_text, [10, 10])
    pygame.display.flip() 
def updateObstacleGroup(map0, map1):
    obstacles = pygame.sprite.Group()
    for ob in map0: obstacles.add(ob)
    for ob in map1: obstacles.add(ob)
    return obstacles

# initialize everything
pygame.init()
screen = pygame.display.set_mode([640,640])
clock = pygame.time.Clock()
skier = SkierClass()
speed = [0, 6]
map_position = 0
points = 0
map0 = create_map(20, 29)
map1 = create_map(10, 19)
activeMap = 0

# group for all obstacles to do collision detection
obstacles = updateObstacleGroup(map0, map1)

# font object for score
font = pygame.font.Font(None, 50)

# main Pygame event loop
while True:
    clock.tick(30)
    for event in pygame.event.get():
        if event.type == pygame.QUIT: 
            sys.exit()
        if event.type == pygame.KEYDOWN: # check for key presses
            if event.key == pygame.K_LEFT: # left arrow turns left
                speed = skier.turn(-1)
            elif event.key == pygame.K_RIGHT: #right arrow turns right
                speed = skier.turn(1)
        skier.move(speed)
        map_position += speed[1] # scroll the terrain

        # manage terrain maps, switch between them,
        # and create new terrain at the bottom
        if map_position >=640 and activeMap == 0:
            activeMap = 1
            map0 = create_map(20, 29)
            obstacles = updateObstacleGroup(map0, map1)
        if map_position >=1280 and activeMap == 1: 
            activeMap = 0
        for ob in map0:
            ob.location[1] = ob.location[1] - 1280 # wrap around to top
        map_position = map_position - 1280 #