python-3.x - 如何使用停在边缘的相机使视差滚动正常工作pygame

Question

假设我们有一个用 pygame 制作的游戏，在这个游戏中，我们有“滚动”对象，它们基本上将相机滚动框装在里面，停在边缘。当玩家离开一个卷轴并进入一个新的卷轴时，相机会从一个卷轴移动到另一个。在这种情况下，要实现视差效果，我们需要将相机滚动的量除以一个值。但是，如果我们只是单独执行此操作，当我们进入新的“滚动”时，相对于它在第一个“滚动”中滚动的量，背景似乎移动了不正确的量，如何解决这个问题? 这是我的相机代码和滚动代码，

import pygame
from pygame.locals import *

class scroll_handler(list):
    def __init__(self):
        self.primary_scroll = None
        self.append(scroll_obj((50+1)*16,(2)*16,65*16,30*16))
        self.append(scroll_obj((51+65)*16,(2)*16,65*16,30*16))

    def update(self,player):
        for i in self:
            if i.entity_in_scroll(player):
                self.primary_scroll = i

class scroll_obj(pygame.Rect):
    def __init__(self,x,y,sx,sy,enable_backgrounds = True):
        super().__init__((x,y),(sx,sy))
        self.enable_backgrounds = enable_backgrounds

    def entity_in_scroll(self,entity):
        return self.contains(entity)

class camera(object):
    def __init__(self, camera_func, widthy, heighty):
        self.state = pygame.Rect((16,16),(widthy,heighty))
        self.camera_func = camera_func
        self.scroll = scroll_obj(16,16,widthy,heighty)

    def update_scroll(self, scroll):
        self.state = pygame.Rect(scroll.x, scroll.y, scroll.width, scroll.height)

    def apply(self, target, state = 0, parallax = False):
        if not parallax:
            return target.move(self.state.topleft)
        if parallax:
            return target.move(state.topleft)

    def update(self, target, parallax_x = 1, parallax_y = 1):
        self.update_scroll(self.scroll)
        self.state = self.camera_func( self.state, target, parallax_x, parallax_y)
    
def complex_camera(camera, target_rect, parallax_x=1, parallax_y=1):
    l, t, _, _ = target_rect
    _, _, w, h = camera
    l, t, _, _ = -l+(320), -t+(180), w, h
    
    l = min(-camera.x, l)                                       # stop scrolling at the left edge
    l = max(-(camera.x + camera.width-640), l)                  # stop scrolling at the right edge
    l = round(l/(parallax_x),2)                         # apply parallax in x direction
        
    t = max(-(camera.y + camera.height-360), t)                # stop scrolling at the bottom   
    t = min(-camera.y, t)                                       # stop scrolling at the top
    t = round(t/(parallax_y),2)                         # apply parallax in y direction
    return pygame.Rect(l, t, w, h)

这是我的背景代码并将视差效果应用于它们

import pygame
class background(pygame.Rect):
    def __init__(self,x,y,image):
        super().__init__(x*16,y*16,1024,512)
        self.image = image
        self.CAX = self.x
        self.CAY = self.y
        self.rect = pygame.Rect(self.CAX,self.CAY,1024,512) # an additional rect object used elsewhere in another code file, ignore this
        
    def apply_camera(self, state, GAME):
        cam = GAME.camera.apply(self, state, True)
        self.CAX = cam[0]
        self.CAY = cam[1]
        self.rect.x = self.CAX
        self.rect.y = self.CAY
        
        
class backgrounds(dict):
    def __init__(self,GAME):
        self.GAME = GAME
        

        BH = self.GAME.background_handler
        self["background_0"] = [background(0,0,BH[0])]
        self["background_1"] = [background(0,1,BH[3])]
        self["background_2"] = [background(0,2,BH[2])]
        self["background_3"] = [background(0,3,BH[1])]

    def get_background(self):
        self.background_0 = []
        self.background_1 = []
        self.background_2 = []
        self.background_3 = []
        
        original = self.GAME.camera.state
        half = pygame.Rect(int(original[0]/2), int(original[1]/2), self.GAME.camera.state.width, self.GAME.camera.state.height)
        quater = pygame.Rect(int(original[0]/4), int(original[1]/4), self.GAME.camera.state.width, self.GAME.camera.state.height)
        eighth = pygame.Rect(int(original[0]/8), int(original[1]/8), self.GAME.camera.state.width, self.GAME.camera.state.height)
        fortieth = pygame.Rect(int(original[0]/40), int(original[1]/40), self.GAME.camera.state.width, self.GAME.camera.state.height)

        for i in self["background_0"]:
            
                i.apply_camera(fortieth,self.GAME)
                self.background_0.append([(i.CAX,i.CAY),(i.image)])
        
        for i in self["background_1"]:
            
                i.apply_camera(eighth,self.GAME)
                self.background_1.append([(i.CAX,i.CAY),(i.image)])
    
        for i in self["background_2"]:

                i.apply_camera(quater,self.GAME)
                self.background_2.append([(i.CAX,i.CAY),(i.image)])

        for i in self["background_3"]:
                i.apply_camera(half,self.GAME)
                self.background_3.append([(i.CAX,i.CAY),(i.image)])
                
        return (self.background_0), (self.background_1), (self.background_2), (self.background_3)

我需要更改什么才能使其在输入新滚动时，背景将处于适当的位置并且不会显着向右移动？

注意：相机和滚动代码在单独的模块中，如果看起来很奇怪，请不要担心

标签： python-3.xpygame2dparallax