[PyGame] Terrible Sprite controls, need help.

[michael1789]

I have this sprite here. The controls are dreadful, and my tinkering is fruitless. I copied it from an Asteroids game, and took out the friction, but I broke it.

Sometimes the "thrust" will cause it to slow/break.

How fast you go is effected strongly by your angle.


Here is the sprite and the event handling. I haven't success yet with this type of controls yet. Any advice would be appreciated.

ship_max_speed = 2
ship_max_rtspd = 3


class Ship(pygame.sprite.Sprite):
    def __init__(self, x, y):
        
        pygame.sprite.Sprite.__init__(self)
        self.ship_img = pygame.Surface((15,10), pygame.SRCALPHA)
        self.ship_img.fill(red)
        self.image = self.ship_img
        self.rect = self.image.get_rect()
        
        self.hit_rect = ship_HIT_RECT
        self.hit_rect.center = self.rect.center
        self.rect.centerx = x
        self.rect.centery = y
       
        self.hspeed = 0
        self.vspeed = 0
        self.dir = 0
        self.rtspd = 0
        self.thrust = False   
        
        
    def update(self):
        
        speed = math.sqrt(self.hspeed**2 + self.vspeed**2)
        if self.thrust:
            
            if speed < ship_max_speed:
                self.hspeed += math.cos(self.dir * math.pi / 180)
                self.vspeed += math.sin(self.dir * math.pi / 180)
            else:
                self.hspeed = ship_max_speed * math.cos(self.dir * math.pi / 180)
                self.vspeed = ship_max_speed * math.sin(self.dir * math.pi / 180)
        
        self.rect.centerx += self.hspeed
        self.rect.centery += self.vspeed
        self.dir = (self.dir + self.rtspd) % 360
        self.image = pygame.transform.rotate(self.ship_img, -self.dir)
        self.rect = self.image.get_rect(center=self.rect.center)

####################################################################################

def get_event(self, event):
        
        self.ship.rtspd = 0
        
        if event.type == pygame.QUIT:
            gameState = "Exit"
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_UP:
                self.ship.thrust = True
                
            if event.key == pygame.K_LEFT:
                self.ship.rtspd = -ship_max_rtspd
            if event.key == pygame.K_RIGHT:
                self.ship.rtspd = ship_max_rtspd            
            
        if event.type == pygame.KEYUP:
            if event.key == pygame.K_UP:
                self.ship.thrust = False
            if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                self.ship.rtspd = 0