I have a character in PyGame which I want to move forward depending on its rotation. Currently it's very strange and wonky.

Here's all my code:

CodePudding user response：

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import pygame, math
pygame.init()

size = width, height = 600, 600
green = 50, 168, 82

screen = pygame.display.set_mode(size)

class Capybara:
    def __init__(self, size_multiplier):
        self.capybara = pygame.image.load('capybara.png')
        self.o_size = 92, 206
        self.new_size = (self.o_size[0] * size_multiplier,self.o_size[1] * size_multiplier)
        self.capybara = pygame.transform.scale(self.capybara, self.new_size)
        self.base_capybara = self.capybara
        self.rotation = 0
        self.x, self.y = 300, 300
        self.rect = self.capybara.get_rect(center = (round(self.x), round(self.y)))

    def rotate(self, amount):
        self.rotation  = amount
        if self.rotation > 360:
            self.rotation -= 360
        elif self.rotation < 0:
            self.rotation  = 360
        self.capybara = pygame.transform.rotate(self.base_capybara, self.rotation)
        self.rect = self.capybara.get_rect(center = (round(self.x), round(self.y)))
        
    def move(self, move):
        self.x  = move * math.cos(math.radians(self.rotation   90))
        self.y -= move * math.sin(math.radians(self.rotation   90))


capybara = Capybara(0.8)

fpsClock = pygame.time.Clock()

rotate_l = False
rotate_r = False

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()

            quit()

    keys = pygame.key.get_pressed()
    rotate = keys[pygame.K_RIGHT] - keys[pygame.K_LEFT]
    move = keys[pygame.K_DOWN] - keys[pygame.K_UP]
    capybara.move(-move * 5)
    capybara.rotate(-rotate)

    screen.fill(green)
    screen.blit(capybara.capybara, capybara.rect)
    pygame.display.update()
    fpsClock.tick(60)