PyEvilClutches source code – Bullets
please note i have not provided you with any of the graphical resources. i believe whilst they are free for use by who have bought the book (the game maker’s apprentice), i don’t want to end up in a tussle with the publishers by releasing them to the general public.
finally, excuse the mess 
"""
Game Maker's Apprentice - Evil Clutches
Ported into PyGame by Mark Sta Ana
With lots of help from Linux Format Magazine's gaming development articles.
Audio and Graphical resources are part of the fine book The Game Maker's Apprentice written by Jacob Habgood and Mark Overmars.
Changelog
20081208 - Bullets (current)
002 -- second attempt at code, this time we use a list to track bullets
001 -- first attempt at code, using a single bullet. as you can imagine
this doesn't work very well. in some cases the boss bullet never reach
the dragon and in turn our dragon is a one hit wonder.
20081201 - Animation
20081124 - Sprites
"""
import os, sys, pygame # using os module to keep file names os neutral
from pygame import *
import random
class Sprite:
"""
This class was feature in the PyInvaders and PyRacer tutorials
in the Linux Format Magazine.
I've annotated the various improvements as i've seen fit.
"""
def __init__(self, xpos, ypos, imgPrefix, frmCount):
self.x = xpos
self.y = ypos
# direction of y (default: going down)
self.dy = 1
self.imgPrefix = imgPrefix
self.loadFrames(frmCount)
# need a default image to render
self.bitmap = self.frames[0]
# set transparency based on bottom left pixel ala Game Maker
self.colorkey = self.bitmap.get_at((0,self.bitmap.get_height()-1))
self.bitmap.set_colorkey(self.colorkey)
# animation, needed by new render function
self.frame = 0
self.delay = 6
self.pause = 0
def render(self):
# A nice bit of animation code (cowMooDelay.py) written by Jaime Moreno
self.pause += 1
if self.pause >= self.delay:
self.pause = 0
self.frame += 1
if self.frame >= len(self.frames):
self.frame = 0
self.bitmap = self.frames[self.frame]
# own little bit to transparentimatize each frame based on
# the colour of the bottom left pixel
self.colorkey = self.bitmap.get_at((0,self.bitmap.get_height()-1))
self.bitmap.set_colorkey(self.colorkey)
screen.blit(self.bitmap, (self.x, self.y))
def loadFrames(self, numFrames):
# More code from Jaime
self.frames = []
if numFrames == 1:
imgName = os.path.join("data", self.imgPrefix)
self.frames.append(image.load(imgName))
else:
for i in range(1,numFrames):
imgName = os.path.join("data",self.imgPrefix + "-10%d.gif" % i)
tmpImage = image.load(imgName)
self.frames.append(tmpImage.convert())
# initialisation
init()
screen = display.set_mode((640,400))
key.set_repeat(1, 1)
display.set_caption('PyEvilClutches')
backdrop = image.load(os.path.join('data', 'Background.bmp'))
backdrop = backdrop.convert() # another tweak
dragon = Sprite(20, 200, 'Dragon',6)
boss = Sprite(500, 200, 'Boss', 4)
#fireball = Sprite(0,480, 'Fireball.gif', 1) # single frame Sprite test
# boss' bullets
# demon = Sprite(0,480, 'Demon',4)
# baby = Sprite(0,480, 'Baby',2)
quit = 0
clock = pygame.time.Clock()
demonDir = 2
demons = []
babies = []
fireballs = []
# main loop
while quit == 0:
clock.tick(30) # set frame rate (60 for normal, 30 for testing)
screen.blit(backdrop, (0, 0))
for ourevent in event.get():
if ourevent.type == QUIT:
quit = 1
# controls for our dragon + escape event
if ourevent.type == KEYDOWN:
if ourevent.key == K_DOWN and dragon.y < 370:
dragon.y += 5
if ourevent.key == K_UP and dragon.y > 10:
dragon.y -= 5
if ourevent.key == K_ESCAPE: # quit game if escape is hit
quit = 1 # default behaviour for game maker
if ourevent.key == K_SPACE:
# NEW: 26/11 HAEDOKEN!
# noticed that this routine blocks i.e. you fire and
# you stop moving...
fireball = Sprite(0,480, 'Fireball.gif', 1) # single frame Sprite test
fireball.x = dragon.x + 100
fireball.y = dragon.y + 10
fireballs.append(fireball)
# This should really all go into a boss object that extends our existing
# Sprite class.
if boss.dy:
boss.y += 5
else:
boss.y -= 5
if boss.y > 250:
boss.dy = 0
if boss.y < 0:
boss.dy = 1
if random.randint(1,50) == 50: # test chance 1 in 50 to fire demon
# create a new demon
demon = Sprite(boss.x - 10, boss.y - 10, 'Demon',4)
demon.x = boss.x - 10
demon.y = boss.y - 10
# which direction is demon going nw(1), w(2), sw(3)?
demonDir = random.randint(1,3)
if demonDir == 1: # nw x-,y-
demon.dy = 1
if demonDir == 3: # sw x-,y+
demon.dy = 0
# no check for 2, because at the end of the day we're always west
demons.append(demon)
if random.randint(1,100) == 100: # test chance 1 in 100 to fire baby dragon
# create a new baby dragon
baby = Sprite(boss.x - 10, boss.y - 10, 'Baby',2)
#baby.x = boss.x - 10
#baby.y = boss.y - 10
babies.append(baby)
for index, demon in enumerate(demons):
# time to remove demons?
if demon.x < -100:
del demons[index]
demon.x -= 10
if demon.dy:
demon.y += 10
else:
demon.y -= 10
# has demon reached the top or bottom of screen?
if demon.y > 290:
demon.dy = 0
if demon.y < -10:
demon.dy = 1
demon.render()
#print "demon %d / %d" % (index,len(demons))
# NEW 26/11
for index, fireball in enumerate(fireballs):
if fireball.x > 640:
del fireballs[index]
fireball.x += 10
fireball.render()
#print "fireball %d / %d" % (index,len(fireballs))
# NEW 28/11
for index, baby in enumerate(babies):
if baby.x < -100:
del babies[index]
baby.x -= 8
baby.render()
#print "baby %d / %d" % (index,len(babies))
# Should think about using Sprite groups...
dragon.render()
boss.render()
display.update()