I’m trying to make a game where a laser is being fired and you have to dodge it, but when i resize the laser to make it taller, the image moves downwards. I think this is because the sprite isn’t properly centered. How do i center it? Sorry if I’m asking a stupid question.

I tried moving the sprite upwards to give the illusion that it isn’t moving, but that didn’t work.

Here’s my code:

import pygame

import math


class Laser(pygame.sprite.Sprite):
    def __init__(self, x, y):
        pygame.sprite.Sprite.__init__(self)
        self.images = []
        for num in range(1, 4):
            self.img = pygame.image.load(f"visuals/obstacles/laser/laser_{num}.png").convert_alpha()
            self.images.append(self.img)
        self.image = self.images[0]
        self.rect = self.image.get_rect()
        self.rect.center = (x, y)
        self.frame = 0
        self.is_visible = False
        self.time = 0
        self.is_firing = False
        self.is_charging = False
        self.charge_width = 0
        self.offset_y = 0

    def update(self):
        self.frame += 0.3
        self.image = self.images[math.floor(self.frame % 3)]
        self.image = pygame.transform.scale(self.image, (900, self.charge_width * 10))

        # Behaviour

        key = pygame.key.get_pressed()

        if key[pygame.K_SPACE]:
            self.is_charging = True

        if self.is_firing:
            self.is_visible = True
            self.time += 1
        if self.time >= 30:
            self.is_visible = False
            self.time = 0
            self.is_firing = False
            self.charge_width = 0

        if self.is_charging:
            self.charge_width += (10 - self.charge_width) / 4
        if self.is_visible:
            self.charge_width = 30

        if self.is_charging:
            self.time += 1
            if self.time >= 30:
                self.time = 0
                self.is_charging = False
                self.is_firing = True

import pygame

import math


class Laser(pygame.sprite.Sprite):
    def __init__(self, x, y):
        pygame.sprite.Sprite.__init__(self)
        self.images = []
        for num in range(1, 4):
            self.img = pygame.image.load(f"visuals/obstacles/laser/laser_{num}.png").convert_alpha()
            self.images.append(self.img)
        self.image = self.images[0]
        self.rect = self.image.get_rect()
        self.rect.center = (x, y)
        self.frame = 0
        self.is_visible = False
        self.time = 0
        self.is_firing = False
        self.is_charging = False
        self.charge_width = 0
        self.offset_y = 0

    def update(self):
        self.frame += 0.3
        self.image = self.images[math.floor(self.frame % 3)]
        self.image = pygame.transform.scale(self.image, (900, self.charge_width * 10))

        # Behaviour

        key = pygame.key.get_pressed()

        if key[pygame.K_SPACE]:
            self.is_charging = True

        if self.is_firing:
            self.is_visible = True
            self.time += 1
        if self.time >= 30:
            self.is_visible = False
            self.time = 0
            self.is_firing = False
            self.charge_width = 0

        if self.is_charging:
            self.charge_width += (10 - self.charge_width) / 4
        if self.is_visible:
            self.charge_width = 30

        if self.is_charging:
            self.time += 1
            if self.time >= 30:
                self.time = 0
                self.is_charging = False
                self.is_firing = True