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私は小惑星のクローンを作っていますが、プレイヤーのスプライトの動きの角度をどこに保存するのか、弾丸にアクセスする方法が分かりません。今は、私の船の回転がangle_speed変数に格納されていると思います。これは、弾のdest_xとdest_y（目的地のxとy）座標を生成するために使用しています。しかし、弾丸は（0、0）に撮影を続けます。誰でも助けることができますか？Pygame-どのようにプレイヤーのスプライトの方向に撮影する？
try:
import sys
import math
import os
import getopt
import pygame
from pygame.locals import *
from pygame.math import Vector2
except ImportError, err:
print "couldn't load module. %s" % (err)
sys.exit(2)
# these are warnings if font or sound modules are not available.
if not pygame.font: print 'Warning, fonts disabled'
if not pygame.mixer: print 'Warning, sound disabled'
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
RED = (255, 0, 0)
BLUE = (0, 0, 255)
class Player(pygame.sprite.Sprite):
"""moves ship on screen"""
def __init__(self, pos=(420,420)):
super(Player, self).__init__() # call Sprite initializer
self.image = pygame.Surface([20, 20])
self.image.fill(RED)
self.original_image = self.image
self.rect = self.image.get_rect(center=pos)
self.position = Vector2(pos)
self.direction = Vector2(0,1)
self.speed = 0
self.angle_speed = 0
self.angle = 0
def update(self):
if self.angle_speed != 0:
# Rotate the direction vector and then the image
self.direction.rotate_ip(self.angle_speed)
self.angle += self.angle_speed
self.image = pygame.transform.rotate(self.original_image, -self.angle)
self.rect = self.image.get_rect(midtop=self.rect.midtop)
# Update the position vector and the rect.
self.position += self.direction * self.speed
self.rect.center = self.position
class Bullet(pygame.sprite.Sprite):
""" This class represents the bullet. """
def __init__(self, start_x, start_y, dest_x, dest_y):
""" Constructor.
It takes in the starting x and y location.
It also takes in the destination x and y position.
"""
# Call the parent class (Sprite) constructor
super(Bullet, self).__init__()
# Set up the image for the bullet
self.image = pygame.Surface([4, 10])
self.image.fill(BLACK)
self.rect = self.image.get_rect()
# Move the bullet to our starting location
self.rect.x = start_x
self.rect.y = start_y
# Because rect.x and rect.y are automatically converted
# to integers, we need to create different variables that
# store the location as floating point numbers. Integers
# are not accurate enough for aiming.
self.floating_point_x = start_x
self.floating_point_y = start_y
# Calculation the angle in radians between the start points
# and end points. This is the angle the bullet will travel.
x_diff = dest_x - start_x
y_diff = dest_y - start_y
angle = math.atan2(y_diff, x_diff);
# Taking into account the angle, calculate our change_x
# and change_y. Velocity is how fast the bullet travels.
velocity = 11
self.change_x = math.cos(angle) * velocity
self.change_y = math.sin(angle) * velocity
def update(self):
""" Move the bullet. """
# The floating point x and y hold our more accurate location.
self.floating_point_y += self.change_y
self.floating_point_x += self.change_x
# The rect.x and rect.y are converted to integers.
self.rect.y = int(self.floating_point_y)
self.rect.x = int(self.floating_point_x)
# If the bullet flies of the screen, get rid of it.
if self.rect.x < 0 or self.rect.x > SCREEN_WIDTH or self.rect.y < 0 or self.rect.y > SCREEN_HEIGHT:
self.kill()
def main():
pygame.init()
pygame.mixer.init()
pygame.key.set_repeat(500,30)
screen = pygame.display.set_mode([SCREEN_WIDTH, SCREEN_HEIGHT])
pygame.display.set_caption('Asteroids')
screen_rect = screen.get_rect()
all_sprites_list = pygame.sprite.Group()
# List of each bullet
bullet_list = pygame.sprite.Group()
bullets = []
player = Player()
all_sprites_list.add(player)
MAXSPEED = 15
MINSPEED = -5
clock = pygame.time.Clock()
done = False
while not done:
clock.tick(60)
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_UP and player.speed > MINSPEED:
player.speed -= 3
if event.key == pygame.K_DOWN and player.speed < MAXSPEED:
player.speed += 3
if event.key == pygame.K_LEFT:
player.angle_speed = -3
if event.key == pygame.K_RIGHT:
player.angle_speed = 3
if event.key == pygame.K_SPACE:
dest_x = math.sin(player.angle_speed)
dest_y = math.cos(player.angle_speed)
# Create the bullet based on where we are, and where we want to go.
bullet = Bullet(player.rect.x, player.rect.y, dest_x, dest_y)
# Add the bullet to the lists
all_sprites_list.add(bullet)
bullet_list.add(bullet)
elif event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT:
player.angle_speed = 0
elif event.key == pygame.K_RIGHT:
player.angle_speed = 0
all_sprites_list.update()
player.rect.clamp_ip(screen_rect)
screen.fill((255, 255, 255))
# screen.blit(player.image, player.rect)
all_sprites_list.draw(screen)
pygame.display.flip()
if __name__ == '__main__':
main()
pygame.quit()