问Pygame，同一组中两个对象之间的碰撞

EN

import random


class Rectangle:

    def __init__(self, height, width, x, y):
        self.height = height
        self.width = width
        self.x = x
        self.y = y

    def collided_with_another_rectangle(self, rect):
        """ Assumes rectangles are same size or that this rectangle is smaller than the other rectangle"""
        if self.x > (rect.x + rect.width):
            # Is to the right of the other rectangle
            return False
        elif (self.x + self.width) < rect.x:
            # is to the left of the other rectangle
            return False
        elif (self.y + self.height) < rect.y:
            # is above the other rectangle
            return False
        elif self.y > (rect.y + rect.height):
            # is below the other rectangle
            return False
        else:
            return True


collision_count = 0
for i in range(0, 1000):
    # Here I pick random locations on a 1000X1000 screen for the first rectangle 
    x1 = random.randint(0, 1000)
    y1 = random.randint(0, 1000)
    # Here I pick random locations on a 1000X1000 screen for the second rectangle 
    rect1 = Rectangle(100, 100, x1, y1)
    x2 = random.randint(0, 1000)
    y2 = random.randint(0, 1000)
    rect2 = Rectangle(100, 100, x2, y2)
    """
     I use the collided with another rectangle function to test if the first rectangle is above,below, 
     to the right or to the left of the other rectangle. If neither of these are true then the rectangles 
     have collided.
    """
    if rect1.collided_with_another_rectangle(rect2):
        collision_count += 1
        print("Rect1 X and Y:" + str(x1) + " " + str(y1))
        print("Rect2 X and Y:" + str(x2) + " " + str(y2))
        print("collided")

print("Collision Count:" + str(collision_count))

import random

import pygame
from pygame.math import Vector2


pygame.init()
WIDTH, HEIGHT = 640, 480


class Alien(pygame.sprite.Sprite):

    def __init__(self, aliens):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.Surface((80, 60))
        self.image.fill((120, random.randrange(255), random.randrange(255)))
        self.rect = self.image.get_rect()
        self.spawn_points = [(-30, 70), (-30, 150), (-30, 230)]
        self.aliens = aliens
        self.reset_pos()
        self.speedx = 10

    def update(self):
        self.rect.x += self.speedx

        if self.rect.x > WIDTH + 20:
            self.reset_pos()

    def reset_pos(self):
        random.shuffle(self.spawn_points)  # Shuffle the spawns.

        for spawn in self.spawn_points:
            # Set the position to one of the spawns.
            self.rect.center = spawn
            # Check if this sprite collides with another one.
            for sprite in self.aliens:
                if sprite is self:  # Skip self.
                    continue
                if self.rect.colliderect(sprite.rect):
                    break  # Break out of the loop if the spawn is occupied.
            else:  # The else means no 'break' occurred in the for loop above,
                   # so the spawn must be free.
                return  # Break out of the method if the spawn is free.

        # I just remove the sprite if no spawn is free. You can do something else here.
        self.kill()


def main():
    screen = pygame.display.set_mode((640, 480))
    clock = pygame.time.Clock()
    aliens = pygame.sprite.Group()
    for _ in range(3):
        # I pass the aliens group to the sprite because we need to
        # iterate over it to see if a sprite collides.
        alien = Alien(aliens)
        aliens.add(alien)
    all_sprites = pygame.sprite.Group(aliens)

    done = False

    while not done:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                done = True
            elif event.type == pygame.MOUSEBUTTONDOWN:
                  al = Alien(aliens)
                  all_sprites.add(al)
                  aliens.add(al)

        all_sprites.update()

        screen.fill((30, 30, 30))
        all_sprites.draw(screen)

        pygame.display.flip()
        clock.tick(30)


if __name__ == '__main__':
    main()
    pygame.quit()

if len(collision) >=2:

def intra_groupcollide(groupa, groupb, dokilla, dokillb, collided=None):
"""detect collision between a group and itself.
This is modified from groupcollide but excludes collisions <=1

pygame.sprite.groupcollide(groupa, groupb, dokilla, dokillb):
    return dict

"""
crashed = {}
# pull the collision function in as a local variable outside
# the loop as this makes the loop run faster
sprite_collide_func = spritecollide
if dokilla:
    for group_a_sprite in groupa.sprites():
        collision = sprite_collide_func(group_a_sprite, groupb,
                                        dokillb, collided)
        if collision:
            if len(collision) >=2:
                crashed[group_a_sprite] = collision
                group_a_sprite.kill()
else:
    for group_a_sprite in groupa:
        collision = sprite_collide_func(group_a_sprite, groupb,
                                        dokillb, collided)
        if collision:
            if len(collision) >=2:
                crashed[group_a_sprite] = collision



                
            
#print(crashed)
return crashed