Question

当海盗船和街区发生碰撞时，试图调用崩溃功能，但由于某种原因，该块将会到达屏幕并调用崩溃功能。游戏确实在碰撞时结束，但是当游戏块碰到屏幕的某些部分时，游戏将随机结束。

import pygame
import time
from pygame.locals import * #all the imports I use
import random

pygame.init() # initialise pygame

display_width = 1500
display_height = 700

black = (0,0,0)
white = (255,255,255)
red = (255,0,0)


gameDisplay = pygame.display.set_mode((display_width,display_height)) #creates the window
pygame.display.set_caption('A bit Shipy')
clock = pygame.time.Clock()

shipIMG = pygame.image.load('ship.png')
ship_width = 50
ship_height = 50 # in pixels

def things_dodged(count):
    font = pygame.font.SysFont(None, 25)
    text = font.render("Dodged: "+str(count), True, black)
    gameDisplay.blit(text, (0,0))

def things(thingx, thingy, thingw, thingh, color): #the scrolling object
    pygame.draw.rect(gameDisplay, color, [thingx, thingy, thingw, thingh])

def ship(x,y): #ship function
    gameDisplay.blit(shipIMG,(x,y))



def text_objects(text, font):
    textSurface = font.render(text, True, red) #game over text
    return textSurface, textSurface.get_rect()


def message_display(text):
    largeText = pygame.font.Font('freesansbold.ttf',200)
    TextSurf, TextRect = text_objects(text, largeText)
    TextRect.center = ((display_width/2),(display_height/2)) #creates the text 
    gameDisplay.blit(TextSurf, TextRect)

    pygame.display.update()
    time.sleep(2) #Game over text lasts two seconds

    game_loop() #runs the game again afterwards

def crash():
    message_display('You Sunk!') #when the player goes off screen or hits an object




#x = (display_width * 0.45)
#y = (display_height * 0.8)

def game_loop(): #the main game loop
    x = (display_width * 0.45)
    y = (display_height * 0.8)
    x_change = 0
    y_change = 0

    thing_startx = display_width
    thing_starty = random.randrange(0, display_height)  #enemy object
    thing_speed = 7
    thing_width = 50
    thing_height = 50

    dodged = 0


    gameExit = False

    while not gameExit:

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                gameExit = True

            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    x_change = -5
                elif event.key == pygame.K_RIGHT:
                    x_change = 5

            if event.type == pygame.KEYUP:
                if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT: #changes x or y dependant on key pressed
                    x_change = 0

            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_UP:
                    y_change = -5

                elif event.key == pygame.K_DOWN:
                    y_change = 5

            if event.type == pygame.KEYUP:
                if event.key == pygame.K_UP or event.key == pygame.K_DOWN:
                    y_change = 0
        x += x_change
        y += y_change



        gameDisplay.fill((0,0,155)) #blue background 


        things(thing_startx, thing_starty, thing_width, thing_height, black) #calls the thing function 
        thing_startx -= thing_speed #moves the block left 
        ship(x,y)
        things_dodged(dodged)


        if x > display_width - ship_width or y > display_height-ship_height or x < 0 or y < 0:
             crash()

        if thing_startx < 0:
            thing_startx = display_width
            thing_starty = random.randrange(0, display_height)
            dodged = dodged + 1

        #here is where the collision detection starts:    
        if x < thing_startx+thing_width:
            print(' y crossover 1')

            if y >= thing_starty and y < thing_starty + thing_height or y+ship_height > thing_starty and y + ship_height < thing_starty +thing_height:
                print (' x crossover 2')
                crash()

        pygame.display.update()
        clock.tick(200)



game_loop()
pygame.quit()
quit()

Answer 1

看起来你对屏幕的碰撞测试是不正确的。这是另一种版本。

    #if x > display_width - ship_width or y > display_height - ship_height or x < 0 or y < 0:
    if (x + ship_width/2 > display_width or    # right edge
        x - ship_width/2 < 0 or                # left edge
        y + ship_height/2 > display_height or  # top
        y - ship_width/2 < 0):                 # bottom
        crash()

您应该考虑将船舶作为对象（类）引入。

您与x轴上的物体的碰撞检测仅检查该块是否留在船上：

    #here is where the collision detection starts:
    if (x  > thing_startx - thing_width/2 and
        x  < thing_startx  + thing_width/2):
        print(' y crossover 1')

也许你应该使用内置精灵来代表船只和街区：sprite

它们是对象，具有检测与其他精灵共谋的功能：collide_rect

碰撞检测简单游戏 - Pygame

1 个答案: