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私はPythonで基本的なSpace Invadersゲームを作成しようとしています。私が苦労している部分は、プレイヤーが発射した弾丸が敵のターゲットに当たったときを検出することです。私はSprite classの両方の弾丸と敵のスプライトの境界の矩形を指定する属性を持って、私はintersect methodcolliderectメソッドを使用して銃弾が敵に当たるかどうかをチェックしている。しかし、どういうわけかintersect methodは、弾丸が実際に敵に当たったかどうかにかかわらず常に1を返します（その意味がわかりません）。Python Pygame：弾丸と敵の衝突検出エラー（Space Invaders）
from pygame import *
import random
import sys
class Sprite:
'''
A Sprite class that can initialize a sprite based on an image, and display it.
Parameters:
filename -> the path of the image to be used
xpos -> the x position of the sprite
ypos -> the y position of the sprite
'''
def __init__(self, filename, xpos, ypos):
self.xpos = xpos
self.ypos = ypos
self.sprite_image, self.rect = load_image(filename, (0, 0, 0))
self.sprite_image.set_colorkey((0, 0, 0))
def display(self, screen):
'''
Displays the sprite onto the screen.
Parameters:
screen -> the PyGame display to draw onto.
'''
screen.blit(self.sprite_image, (self.xpos, self.ypos))
def intersect(self, sprite_2):
'''
Returns whether a sprite intersects with another sprite.
Parameters:
sprite_2 -> the sprite to compare intersection with
Returns:
Whether the sprite intersects with sprite_2
'''
return self.rect.colliderect(sprite_2.rect)
def load_image(path, colorkey):
'''
Returns an image and its bounding rectangle based on a filename.
Parameters:
path -> the path of the picture
colorkey -> the color defined to be transparent
Returns:
the loaded image
the bounding rectangle of the image
'''
try:
sprite_image = image.load(path)
except error, message:
print("Cannot load image: {0}".format(path))
sprite_image = sprite_image.convert()
if colorkey is not None:
if colorkey is -1:
colorkey = sprite_image.get_at((0, 0))
sprite_image.set_colorkey(colorkey, RLEACCEL)
return sprite_image, sprite_image.get_rect()
def main():
'''
The main function runs the Space Invader game, implementing all the logic, calculation,
and user interaction.
'''
init()
screen = display.set_mode((800, 600))
display.set_caption("Space Invaders")
fighter = Sprite("spaceship.png", 357, 520)
enemies = []
bullets_good = [] # List of all of the bullets fired by the hero/fighter
for i in range(8): # Add the enemies into the enemies list
new_enemy = Sprite("enemy.png", 55 * i + 10, 50)
enemies.append(new_enemy)
while True:
screen.fill((0, 0, 0)) # Continiously refresh the background of the screen
for enemy in enemies: # Draw the enemies onto the screen
enemy.display(screen)
for bullet in bullets_good: # Draw the bullets onto the screen
bullet.ypos -= 10
for enemy in enemies:
if bullet.intersect(enemy) == 0:
print("MISSILE HIT ENEMY")
bullet.display(screen)
for keyevent in event.get(): # Go through key press events
if keyevent.type == QUIT:
quit()
sys.exit()
if keyevent.type == KEYDOWN:
if keyevent.key == K_LEFT:
fighter.xpos -= 5
if keyevent.key == K_RIGHT:
fighter.xpos += 5
if keyevent.key == K_UP:
# Create a new bullet and add it to the list of bullets fired by the hero
bullet = Sprite("bullet.png", fighter.xpos + 34, fighter.ypos - 20)
bullets_good.append(bullet)
fighter.display(screen)
display.update()
pass
main() # Run the game!