Pygame. How Do I Resize My Fish Player Image Everytime It Eats A Fish?

Question

I am trying to make my fish bigger everytime it eats a fish but I am not sure why its not working this is what I did

everything else works but my playerman height or width is not adding up video

# our main loop
runninggame = True
while runninggame:
    clock.tick(fps)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            runninggame = False

         #[...........]
    for blac in blacs:
        if playerman.rect.colliderect(blac.rect):
            playerman.width += 10
            playerman.height += 10
            blac.x = 880

my full code: https://pastebin.com/iL5h4fst

Answer 1

You need to scale all the images of the player with pygame.transform.smoothscale(), when the size is inreased:

if playerman.rect.colliderect(blac.rect):
    playerman.width += 10
    playerman.height += 10
    blac.x = 880
    playerman.right = [pygame.transform.scale(image, (playerman.width,playerman.height)) for image in playerman.right]
    playerman.left = [pygame.transform.scale(image, (playerman.width,playerman.height)) for image in playerman.left]
    playerman.rect = pygame.Rect(playerman.x, playerman.y, playerman.width, playerman.height)

The attributes self.width and self.height have to be initialized by the down scaled size of the images (image.get_width()//8 respectively image.get_height()//8)

As the player grows, you'll need to multiply the size of the player by a scale factor to keep the aspect ratio. When using pygame.transform.scale, round the width and height to integral numbers:

class player:
    def __init__(self,x,y,height,width,color):
        # [...]

        self.right_original = [pygame.image.load("r" + str(i) + ".png") for i in range(1, 13)]
        self.left_original = [pygame.image.load("l" + str(i) + ".png") for i in range(1, 13)]
        self.width = self.right_original[0].get_width() / 8
        self.height = self.right_original[0].get_height() / 8
        self.scale_images()

        # [...]

    def scale_images(self):
        w, h = round(self.width), round(self.height)
        self.right = [pygame.transform.scale(image, (w, h)) for image in self.right_original]
        self.left = [pygame.transform.scale(image, (w, h)) for image in self.left_original]
        self.rect = pygame.Rect(self.x, self.y, w, h)

    def collide(self, other_rect):
        return self.rect.colliderect(other_rect)

    def grow(self, scale):
        self.width *= scale
        self.height *= scale
        self.scale_images()

for blac in blacs:
    if playerman.collide(blac):
        blac.x = 880
        playerman.grow(1.1)