在课堂上使用碰撞表

如何解决在课堂上使用碰撞表

我创建了一个创建矩形并将其放入列表的类。我不希望它们发生碰撞，所以我使用collistlist，但是它不起作用。矩形仍在碰撞。

我还希望矩形移动到特定点时向下移动并更改x位置，

我可以这样做，但是我不确定这是否会阻止colliderlist工作

查看下面的代码以获得更多说明。

import pygame
import random
from pygame.locals import *
import time 
pygame.init()
a = 255,255,255
b = 0,0
c = 80,0
d = 0,125,125
r1 = (b,c,d)
r = random.choice(r1)
p_x = 500
p_y = 1399
width = 500
height = 1890

display = pygame.display.set_mode((width,height))
title = pygame.display.set_caption("Game")
clock = pygame.time.Clock()

run = False
exit_game = False

x = random.randrange(10,900)
y = random.randrange(10,900)

sy = 10
w = random.randrange(40,90)
h = random.randrange(40,90)

rectangles =[]

class Rectangle:
    def __init__(self,color,x,y,w,h):
        self.c = color
        self.x = x
        self.y = y
        self.w = w
        self.h = h
        self.rect =pygame.Rect(self.x,self.y,self.w,self.h)
        
    def draw(self):
        pygame.draw.rect(display,self.c,(self.x,self.h))
        
        self.y += sy
        if self.y > height:
                self.y = -25
                self.x = random.randint(10,900)
                return self.rect
        return self.rect
                
        
    
                
            
            


for count in range(5):
    r_c = random.randint(0,255),random.randint(0,255) 
    
    r_x = random.randint(10,900)
    r_y = random.randint(10,79)
    r_w = random.randint(60,100) 
    r_h = random.randint(40,80) 
    
    
    rectangle = Rectangle(r_c,r_x,r_y,r_w,r_h)
    rectangles.append(rectangle)

    
    
    
    

while not run:
    display.fill(a)
    p =pygame.draw.rect(display,(p_x,p_y,56,56))
    
    

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            exit_game = True
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_q:
                p_x -= 60
            if event.key == pygame.K_p:
                p_x += 60
                
    for rectangle in rectangles:
        if rectangle.rect.collidelist(rectangles) > -1:     
            rectangle.draw()

        

    
    pygame.display.update()
    clock.tick(60)
    

pygame.quit()
quit()
    

解决方法

SemaphoreSlim评估单个collidelist()对象和pygame.Rect对象列表之间的碰撞。 从类中删除属性.x，.y，.w和.h，但是添加一个新的方法更新：

class Rectangle:
    def __init__(self,color,x,y,w,h):
        self.c = color
        self.rect = pygame.Rect(x,h)
    def update(self):
        self.rect.y += sy
        if self.rect.y > height:
            self.rect.y = -25
            self.rect.x = random.randint(10,900)
    def draw(self):
        pygame.draw.rect(display,self.c,self.rect)

在碰撞测试之前，您必须生成pygame.Rect个对象的列表。由于每个矩形都在列表中，因此碰撞测试将始终至少找到一个矩形（本身）。使用pygame.Rect并检查碰撞矩形的数量是否小于2：

while not run:
    # [...]

    for rectangle in rectangles:
        rectangle.update()
        rectlist = [r.rect for r in rectangles]
        if len(rectangle.rect.collidelistall(rectlist)) < 2:     
            rectangle.draw()

---

无论如何，我建议创建不相交的矩形。初始化时：

rectangles = []        
rectlist = []           
for count in range(5):
    r_c = random.randint(0,255),random.randint(0,255) 
    
    create_new = True
    while create_new:
        r_x = random.randint(10,900)
        r_y = random.randint(10,79)
        r_w = random.randint(60,100) 
        r_h = random.randint(40,80) 
        rectangle = Rectangle(r_c,r_x,r_y,r_w,r_h)
        create_new = rectangle.rect.collidelist(rectlist) > -1
    
    rectangles.append(rectangle)
    rectlist.append(rectangle.rect)

在类update的方法Rectangle中：

class Rectangle:
    # [...]

    def update(self,rectangles):
        self.rect.y += sy
        if self.rect.y > height:
            rectlist = [r.rect for r in rectangles if r != self]
            self.rect.y = -25
            self.rect.x = random.randint(10,900)
            while self.rect.collidelist(rectlist) > -1:
                self.rect.x = random.randint(10,900)

---

完整示例：

import pygame
import random
from pygame.locals import *
import time 
pygame.init()
a = 255,255,255
b = 0,0
c = 80,0
d = 0,125,125
r1 = (b,c,d)
r = random.choice(r1)
p_x = 500
p_y = 1399
width = 500
height = 1890

display = pygame.display.set_mode((width,height))
title = pygame.display.set_caption("Game")
clock = pygame.time.Clock()

run = False
exit_game = False

sy = 10

class Rectangle:
    def __init__(self,h)

    def update(self,900)
    
    def draw(self):
        pygame.draw.rect(display,self.rect)

rectangles = []        
rectlist = []           
for count in range(5):
    r_c = random.randint(0,r_h)
        create_new = rectangle.rect.collidelist(rectlist) > -1
    
    rectangles.append(rectangle)
    rectlist.append(rectangle.rect)

while not run:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            exit_game = True
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_q:
                p_x -= 60
            if event.key == pygame.K_p:
                p_x += 60
                
    for rectangle in rectangles[:]:
        rectangle.update(rectangles)
    
    display.fill(a)
    p = pygame.draw.rect(display,(p_x,p_y,56,56))
    for rectangle in rectangles:
        rectangle.draw()
    pygame.display.update()
    clock.tick(60)
    
pygame.quit()
quit()