![](/img/trans.png)
[英]Keeping transparent pixels through rotozoom in pygame, Python 3
[英]How to animate scale and rotate in pygame using rotozoom
好的,我只是尝试先使其旋转,然后再缩放,然后一旦我确定旋转缩放应该很容易。 对于我的一生,我似乎无法正常工作。 这是一个简单的类,我希望对象随时间旋转以及在x方向上进行变换。 转换工作正常,但我无法旋转。
class Puff(pygame.sprite.Sprite):
def __init__(self, screen):
pygame.sprite.Sprite.__init__(self)
self.screen = screen
try:
self.imagePuff = pygame.image.load(os.path.join("Images","puff.tga")).convert()
except:
raise UserWarning, "Unable to find Puff image"
self.imagePuff.set_colorkey((0,0,255))
self.image = self.imagePuff
self.rect = self.image.get_rect()
self.x = self.screen.get_width()/3
self.y = self.screen.get_height()/3+10
self.rect.center = (self.x, self.y)
self.lifespan = 60
self.speed = 1
self.count = 0
self.angle = 0
def update(self):
self.calcPos()
self.rect.center = self.x, self.y
self.transform()
if self.count > self.lifespan:
self.kill()
def calcPos(self):
self.x -= 5
self.y = self.y
def transform(self):
self.count += 1.1
self.angle += self.count*25
self.newTrans = pygame.transform.scale(self.copyImage, (400,400))
self.newRect = self.newTrans.get_rect()
self.newRect.center = self.rect.center
这就是我做到的方式,因此您可以轮换粉扑课程:
import pygame
class Puff(pygame.sprite.Sprite):
def __init__(self, screen):
pygame.sprite.Sprite.__init__(self)
self.screen = screen
try:
self.imagePuff = pygame.image.load("puff.jpg").convert()
except:
raise UserWarning, "Unable to find Puff image"
self.image = self.imagePuff
self.imagePuff.set_colorkey((0,0,255))
self.rect = self.image.get_rect()
self.x = self.screen.get_width()/3
self.y = self.screen.get_height()/3+10
self.rect.center = (self.x, self.y)
self.lifespan = 60
self.speed = 1
self.count = 0
self.angle = 0
def update(self):
oldCenter = self.rect.center
self.image = pygame.transform.rotate(self.imagePuff, self.angle)
self.rect = self.image.get_rect()
self.rect.center = oldCenter
def calcPos(self):
self.x -= 5
self.y = self.y
def turnLeft(self):
self.angle = (self.angle + 45) % 360
def turnRight(self):
self.angle = (self.angle - 45) % 360
if __name__ == "__main__":
pygame.init()
screen = pygame.display.set_mode((400,300))
clock = pygame.time.Clock()
background = pygame.Surface(screen.get_size())
background.fill((0, 0, 0))
pygame.display.set_caption("Spinning sprite!!!")
ball = Puff(screen)
sprites = pygame.sprite.Group()
sprites.add(ball)
keepGoing = True
while keepGoing:
for event in pygame.event.get():
if event.type == pygame.QUIT:
keepGoing = False
ball.turnRight()
sprites.clear(screen, background)
sprites.update()
sprites.draw(screen)
pygame.display.flip()
clock.tick(30)
本质上,关键点是:
self.image = pygame.transform.rotate(self.imagePuff, self.angle)
在更新方法和更改角度的两种方法中:
def turnLeft(self):
self.angle = (self.angle + 45) % 360
def turnRight(self):
self.angle = (self.angle - 45) % 360
在每个时钟刻度上方的代码中,子画面会向右旋转:
ball.turnRight()
当您省略了transform方法时,我不得不编辑代码以演示如何进行旋转。
希望这会有所帮助,如果您需要更多帮助,请发表评论。
编辑:
如果要旋转并向左移动,则只需添加以下内容:
def update(self):
self.calcPos() # This moves the position - 5 in the x direction
self.rect.center = self.x, self.y
self.rotate() # This calls the bit to change the angle
if self.count > self.lifespan:
self.kill()
oldCenter = self.rect.center
self.image = pygame.transform.rotate(self.imagePuff, self.angle) # This rotates
self.rect = self.image.get_rect()
self.rect.center = oldCenter
def calcPos(self):
self.x -= 5
def rotate(self):
self.angle = (self.angle + 45) % 360
您应该签出:
http://www.gamedev.net/topic/444490-pygame-easy-as-py/
如果您搜索“ rotate.py”,您将看到有关旋转精灵的一段代码
编辑:
尝试将变换方法更改为:
def transform(self):
self.count += 1.1
self.angle += (self.count*25) % 360
self.copyImage = pygame.transform.rotate(self.imagePuff, self.angle)
self.newTrans = pygame.transform.scale(self.copyImage, (400,400))
self.image = self.newTrans
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