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Fix pygame examples for Python 3 compatibility #6

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Fix pygame examples for Python 3 compatibility #6

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173 changes: 107 additions & 66 deletions lunarlander.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8,56 +8,60 @@
import math

from pygame.locals import RLEACCEL, QUIT, K_r, K_SPACE, K_UP, K_LEFT, K_RIGHT
#from pygame.locals import *
# from pygame.locals import *

FPS = 80

pygame.init()

fpsClock=pygame.time.Clock()
fpsClock = pygame.time.Clock()

SCREEN_WIDTH, SCREEN_HEIGHT = 800, 600
ARENA_WIDTH, ARENA_HEIGHT = 10 * SCREEN_WIDTH, 10 * SCREEN_HEIGHT
ARENA_WIDTH, ARENA_HEIGHT = 10 * SCREEN_WIDTH, 10 * SCREEN_HEIGHT

screen = pygame.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT), 0, 32)
surface = pygame.Surface(screen.get_size())
surface = surface.convert()
surface.fill((255,255,255))
surface.fill((255, 255, 255))
clock = pygame.time.Clock()

pygame.key.set_repeat(1, 1)

def load_image(name, colorkey=None):
fullname = os.path.join('lunarlander', name)

def load_image(name, colorkey=None, fallback_color=(200, 200, 200)):
fullname = os.path.join("lunarlander", name)
try:
image = pygame.image.load(fullname)
except pygame.error, message:
print 'Cannot load image:', fullname
raise SystemExit(message)
except pygame.error as message:
print("Cannot load image:", fullname, "- using fallback")
image = pygame.Surface((50, 50), pygame.SRCALPHA)
pygame.draw.polygon(image, fallback_color, [(25, 0), (50, 50), (0, 50)])
image = image.convert()
if colorkey is not None:
if colorkey is -1:
colorkey = image.get_at((0,0))
colorkey = image.get_at((0, 0))
image.set_colorkey(colorkey, RLEACCEL)
return image, image.get_rect()


class V(object):
"""
A simple class to keep track of vectors, including initializing
from Cartesian and polar forms.
"""

def __init__(self, x=0, y=0, angle=None, magnitude=None):
self.x = x
self.y = y

if (angle is not None and magnitude is not None):
if angle is not None and magnitude is not None:
self.x = magnitude * math.sin(math.radians(angle))
self.y = magnitude * math.cos(math.radians(angle))

@property
def magnitude(self):
return math.sqrt(self.x ** 2 + self.y ** 2)
return math.sqrt(self.x**2 + self.y**2)

@property
def angle(self):
if self.y == 0:
Expand All @@ -80,27 +84,36 @@ def rotate(self, angle):
self.y = self.x * s + self.y * c

def __str__(self):
return "X: %.3d Y: %.3d Angle: %.3d degrees Magnitude: %.3d" % (self.x, self.y, self.angle, self.magnitude)
return "X: %.3d Y: %.3d Angle: %.3d degrees Magnitude: %.3d" % (
self.x,
self.y,
self.angle,
self.magnitude,
)


class Lander(pygame.sprite.DirtySprite):
"""
Our intrepid lunar lander!
"""

def __init__(self):
self.image, self.rect = load_image('lander.jpg', -1)
self.image, self.rect = load_image("lander.jpg", -1, (200, 200, 200))

self.original = self.image
self.original_flame, self.flame_rect = load_image('lander_flame.jpg', -1)

self.original_flame, self.flame_rect = load_image(
"lander_flame.jpg", -1, (255, 100, 0)
)

self.mass = 10
self.orientation = 0.0 #
self.rect.topleft = ((SCREEN_WIDTH / 2), 20) # The starting point.
self.engine_power = 2 # The power of the engine.
self.velocity = V(0.0,0.0) # Starting velocity.
self.landed = False # Have we landed yet?
self.intact = True # Is the ship still shipshape?
self.fuel = 100 # Units of fuel
self.boosting = 0 # Are we in "boost" mode? (show the flame graphic)
self.orientation = 0.0 #
self.rect.topleft = ((SCREEN_WIDTH // 2), 20) # The starting point.
self.engine_power = 2 # The power of the engine.
self.velocity = V(0.0, 0.0) # Starting velocity.
self.landed = False # Have we landed yet?
self.intact = True # Is the ship still shipshape?
self.fuel = 100 # Units of fuel
self.boosting = 0 # Are we in "boost" mode? (show the flame graphic)
return super(pygame.sprite.DirtySprite, self).__init__()

def update_image(self):
Expand All @@ -120,26 +133,30 @@ def rotate(self, angle):

def boost(self):
"""
Provide a boost to our craft's velocity in whatever orientation we're currently facing.
Provide a boost to our craft's velocity in whatever orientation we're currently facing.
"""
if not self.fuel: return
if not self.fuel:
return
self.velocity += V(magnitude=self.engine_power, angle=self.orientation)
self.fuel -= 1
if self.landed:
self.landed = False
np = self.rect.move(0, -5)
self.rect = np
self.boosting = 3

def physics_update(self):
if not self.landed:
self.velocity += V(magnitude=.5, angle=180)
self.velocity += V(magnitude=0.5, angle=180)

def ok_to_land(self):
return (self.orientation < 10 or self.orientation > 350) and self.velocity.magnitude < 5
return (
self.orientation < 10 or self.orientation > 350
) and self.velocity.magnitude < 5

def check_landed(self, surface):
if self.landed: return
if self.landed:
return
if hasattr(surface, "radius"):
collision = pygame.sprite.collide_circle(self, surface)
else:
Expand All @@ -151,35 +168,57 @@ def check_landed(self, surface):
else:
# Hard landing, kaboom!
self.intact = False
self.velocity = V(0.0,0.0) # In any case, we stop moving.
self.velocity = V(0.0, 0.0) # In any case, we stop moving.

def update(self):
self.physics_update() # Iterate physics
self.physics_update() # Iterate physics
if self.boosting:
self.boosting -= 1 # Tick over engine time
self.update_image()
np = self.rect.move(self.velocity.x, -1 * self.velocity.y)
self.rect = np
self.dirty = True

def explode(self, screen):
for i in range(random.randint(20,40)):
pygame.draw.line(screen,
(random.randint(190, 255),
random.randint(0,100),
random.randint(0,100)),
self.rect.center,
(random.randint(0, SCREEN_WIDTH),
random.randint(0, SCREEN_HEIGHT)),
random.randint(1,3))
for i in range(random.randint(20, 40)):
pygame.draw.line(
screen,
(
random.randint(190, 255),
random.randint(0, 100),
random.randint(0, 100),
),
self.rect.center,
(random.randint(0, SCREEN_WIDTH), random.randint(0, SCREEN_HEIGHT)),
random.randint(1, 3),
)

def stats(self):
return "Position: [%.2d,%.2d] Velocity: %.2f m/s at %.3d degrees Orientation: %.3d degrees Fuel: %d Status: [%s]" % (self.rect.top, self.rect.left, self.velocity.magnitude, self.velocity.angle, self.orientation, self.fuel, ("Crashed" if not self.intact else ("Landed" if self.landed else ("OK to Land" if self.ok_to_land() else "Not OK"))))
return (
"Position: [%.2d,%.2d] Velocity: %.2f m/s at %.3d degrees Orientation: %.3d degrees Fuel: %d Status: [%s]"
% (
self.rect.top,
self.rect.left,
self.velocity.magnitude,
self.velocity.angle,
self.orientation,
self.fuel,
(
"Crashed"
if not self.intact
else (
"Landed"
if self.landed
else ("OK to Land" if self.ok_to_land() else "Not OK")
)
),
)
)


class Moon(pygame.sprite.DirtySprite):
def __init__(self):
self.width = SCREEN_WIDTH+20
self.width = SCREEN_WIDTH + 20
self.height = 20
self.image = pygame.Surface((self.width, self.height))
self.rect = pygame.Rect(-10, SCREEN_HEIGHT - 20, SCREEN_WIDTH + 20, 20)
Expand All @@ -193,41 +232,41 @@ def __init__(self):
self.radius = self.diameter / 2
self.x_pos = random.randint(0, SCREEN_WIDTH)
self.image = pygame.Surface((self.diameter, self.diameter))
#self.image.fill((255,255,255,128))
pygame.draw.circle(self.image, (128,128,128), (self.radius, self.radius), self.radius)
self.rect = pygame.Rect(self.x_pos, SCREEN_HEIGHT - (20 + self.radius),
self.diameter, self.diameter)
# self.image.fill((255,255,255,128))
pygame.draw.circle(
self.image, (128, 128, 128), (self.radius, self.radius), self.radius
)
self.rect = pygame.Rect(
self.x_pos, SCREEN_HEIGHT - (20 + self.radius), self.diameter, self.diameter
)
self.image = self.image.convert()
self.landing_ok = False
self.dirty = False
return super(pygame.sprite.DirtySprite, self).__init__()

def initialize():

def initialize():
lander = Lander()
moon = Moon()
sprites = [lander]
boulders = [Boulder() for i in range(random.randint(2,5))]
boulders = [Boulder() for i in range(random.randint(2, 5))]
sprites.extend(boulders)
sprites.append(moon)
return lander, moon, boulders, pygame.sprite.RenderPlain(sprites)


if __name__ == '__main__':

if __name__ == "__main__":
lander, moon, boulders, allsprites = initialize()

while True:

pygame.event.pump()
keys = pygame.key.get_pressed()

for event in pygame.event.get():

if event.type == QUIT:
pygame.quit()
sys.exit()

if keys[K_r]:
lander, moon, boulders, allsprites = initialize()
elif keys[K_SPACE] or keys[K_UP]:
Expand All @@ -241,33 +280,35 @@ def initialize():
for boulder in boulders:
lander.check_landed(boulder)

surface.fill((255,255,255))
surface.fill((255, 255, 255))

font = pygame.font.Font(None, 14)

text = font.render(lander.stats(), 1, (10, 10, 10))
textpos = text.get_rect()
textpos.centerx = SCREEN_WIDTH / 2
surface.blit(text, textpos)
screen.blit(surface, (0,0))
screen.blit(surface, (0, 0))
allsprites.update()
allsprites.draw(screen)

def render_center_text(surface, screen, txt, color):
font2 = pygame.font.Font(None, 36)
text = font2.render(txt, 1, color)
textpos = text.get_rect()
textpos.centerx = SCREEN_WIDTH / 2
textpos.centery = SCREEN_HEIGHT / 2
textpos.centerx = SCREEN_WIDTH // 2
textpos.centery = SCREEN_HEIGHT // 2
surface.blit(text, textpos)
screen.blit(surface, (0,0))
screen.blit(surface, (0, 0))

if lander.landed:
if not lander.intact:
lander.explode(screen)
#render_center_text(surface, screen, "Kaboom! Your craft is destroyed.", (255,0,0))
# render_center_text(surface, screen, "Kaboom! Your craft is destroyed.", (255,0,0))
else:
render_center_text(surface, screen, "You landed successfully!", (0,255,0))
render_center_text(
surface, screen, "You landed successfully!", (0, 255, 0)
)

pygame.display.flip()
pygame.display.update()
Expand All @@ -277,4 +318,4 @@ def render_center_text(surface, screen, txt, color):
pygame.display.flip()
pygame.display.update()

fpsClock.tick(FPS) # and tick the clock.
fpsClock.tick(FPS) # and tick the clock.
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