Question

I am fairly new to pygame and am working on my first game. (So sorry if I m asking a stupid question) I am trying to get the title of the game to slowly increase and decrease in size like a sort of breathing effect in order to make the home screen more visually appealing.

这里,我已想到的是,要输入形象:

name = self.dir_path + "pixeltitle.png"
self.pixeltitle = pg.image.load(name)
self.pixeltitlerect = self.pixeltitle.get_rect()
self.pixeltitlerect.center = (250,120)
self.screen.blit(self.pixeltitle,self.pixeltitlerect)

我先看一看一眼,我会增加休养的体积,然而,它却被转移到右上下。是否有办法增加面积,并在同一地点保留中心? 是否有办法使增减规模更加顺利? 该法典的其余部分:

clicked = False
        grow = 0
        mode =  grow 
        while not clicked:
            if grow>40:
                mode =  shrink 
            if grow<1:
                mode =  grow 
                self.pixeltitle = pg.transform.scale(self.pixeltitle,(400,400))


            if mode ==  grow :
                grow+=1
            else:
                grow-=1

            xsize=400+int(grow)
            ysize=400+int(grow)

            self.pixeltitle = pg.transform.scale(self.pixeltitle,(xsize,ysize))
            self.pixeltitlerect.center = (250,120)
            self.screen.blit(self.pixeltitle,self.pixeltitlerect)
            pg.display.flip()

Answer 1

在水面缩小后,你未能更新<代码>本身。

self.pixeltitle = pg.transform.scale(self.pixeltitle,(xsize,ysize))

# size of surface has been changed get the new rectangle
self.pixeltitlerect = self.pixeltitle.get_rect()

self.pixeltitlerect.center = (250,120)
self.screen.blit(self.pixeltitle,self.pixeltitlerect)

甚至更短(见pyega.Surface.get_rect():

self.pixeltitle = pg.transform.scale(self.pixeltitle,(xsize,ysize))
self.pixeltitlerect = self.pixeltitle.get_rect(center = (250,120))
self.screen.blit(self.pixeltitle,self.pixeltitlerect)

不包括原水面。如果原水面缩小,就会发生扭曲。保存原始形象<代码>。

self.pixeltitle = pygame.transform.scale(self.pixeltitleorig,(xsize,ysize))

另见

例如:

import pygame
pygame.init()
window = pygame.display.set_mode((500, 500))
clock = pygame.time.Clock()

class ScalingSurface:
    def __init__(self):
        name = "pixeltitle.png"
        self.pixeltitleorig = pg.image.load(name)
        self.pixeltitle     = self.pixeltitleorig
        self.pixeltitlesize = self.pixeltitle.get_size()
        self.pixeltitlerect = self.pixeltitle.get_rect()
        self.pixeltitlerect.center = (250,120)
        self.mode =  grow 
        self.grow = 0

    def update(self):
        if self.grow > 40:
            self.mode =  shrink 
        if self.grow<1:
            self.mode =  grow 
        self.grow += 1 if self.mode ==  grow  else -1

        xsize = self.pixeltitlesize[0] + round(self.grow)
        ysize = self.pixeltitlesize[1] + round(self.grow)
        self.pixeltitle = pygame.transform.scale(self.pixeltitleorig,(xsize,ysize))
        self.pixeltitlerect = self.pixeltitle.get_rect(center = (250,120))

    def draw(self, surf):
        surf.blit(self.pixeltitle,self.pixeltitlerect)

img = ScalingSurface()
run = True
while run:
    clock.tick(60)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

    window.fill(0)
    img.update()
    img.draw(window)
    pygame.display.flip()

友情链接