I am creating a racecar game and I have decided to rewrite it because I realised I was initially writing it in a very inefficient way. I initially used image an just changed their location around the screen but I am now trying to learn how to create an object and I am running into a problem which I had initially but I don't know how to fix within a class.
What happens is when I turn the image it distorts a lot and ends up slowing down because I think pygame can't handle it maybe. In my old code, I created a copy of the original image and rotated the copy of the image which fixed the distortion problem. I now don't know how to do the same within a class.
main.py
import pygame, random
#Let's import the Car Class
from Car import Car
pygame.init()
SCREENWIDTH=800
SCREENHEIGHT=600
size = (SCREENWIDTH, SCREENHEIGHT)
screen = pygame.display.set_mode(size)
pygame.display.set_caption("Car Racing")
#This will be a list that will contain all the sprites we intend to use in our game.
all_sprites_list = pygame.sprite.Group()
playerCar = Car(60, 80, 70)
playerCar.rect.x = 160
playerCar.rect.y = 100
# Add the car to the list of objects
all_sprites_list.add(playerCar)
#Allowing the user to close the window...
carryOn = True
clock=pygame.time.Clock()
while carryOn:
for event in pygame.event.get():
if event.type==pygame.QUIT:
carryOn=False
elif event.type==pygame.KEYDOWN:
if event.key==pygame.K_x:
playerCar.moveRight(10)
keys = pygame.key.get_pressed()
if keys[pygame.K_LEFT]:
#playerCar.moveLeft(5)
playerCar.rot_center(2)
if keys[pygame.K_RIGHT]:
#playerCar.moveRight(5)
playerCar.rot_center(-2)
if keys[pygame.K_UP]:
playerCar.moveUp(5)
if keys[pygame.K_DOWN]:
playerCar.moveDown(5)
all_sprites_list.update()
#Drawing on Screen
screen.fill("white")
#Now let's draw all the sprites in one go. (For now we only have 1 sprite!)
all_sprites_list.draw(screen)
#Refresh Screen
pygame.display.flip()
#Number of frames per secong e.g. 60
clock.tick(25)
pygame.quit()
Car.py
import pygame
WHITE = (255, 255, 255)
class Car(pygame.sprite.Sprite):
#This class represents a car. It derives from the "Sprite" class in Pygame.
def __init__(self, width, height, speed):
# Call the parent class (Sprite) constructor
super().__init__()
# Instead we could load a proper picture of a car...
self.image = pygame.image.load("car.png").convert_alpha()
self.image = pygame.transform.rotate(self.image, 90)
#Initialise attributes of the car.
self.width=width
self.height=height
rect_surf = pygame.Surface((width, height), pygame.SRCALPHA)
rect_surf.fill((0, 0, 0, 0))
self.rect_surf = rect_surf
# Draw the car (a rectangle!)
pygame.draw.rect(self.image, (0, 0, 0, 0), [0, 0, self.width, self.height])
# Fetch the rectangle object that has the dimensions of the image.
self.rect = self.image.get_rect()
def moveRight(self, pixels):
self.rect.x += pixels
def moveLeft(self, pixels):
self.rect.x -= pixels
def moveUp(self, pixels):
self.rect.y -= pixels
def moveDown(self, pixels):
self.rect.y += pixels
def changeSpeed(self, speed):
self.speed = speed
def rot_center(self, angle):
rotated_image = pygame.transform.rotate(self.image, angle)
new_rect = rotated_image.get_rect(center = self.image.get_rect(center = (self.rect.x + (self.rect.width / 2), self.rect.y + (self.rect.height / 2))).center)
self.image = rotated_image
self.rect = new_rect
Any help on how to slvoe this would be much appreciated. I had questions about how to initially turn the image on another question, How do I make an object in pygame rotate.
I also don't know how to apply the rect correctly so that it is the size of the image and doesn't create a transparent spot on the image. Any help would be much appreciated thanks. :):)
