Changing direction of rotation Pygame
- by czl
How would you change the direction of a rotating image/rect in Pygame? Applying positive and negative degree values works but it seems to only be able to rotate one direction throughout my window. Is there a way to ensure a change in direction of rotation?
Perhaps change up rotation of a spinning image every 5 seconds, or if able to change the direction of the spin when hitting a X or Y axis.
I've added some code below.
It seems like switching movement directions is easy with rect.move_ip as long as I specify a speed and have location clause, it does what I want. Unfortunately rotation is't like that. Here I'l adding angles to make sure it spins, but no matter what I try, I'm unable to negate the rotation.
def rotate_image(self): #rotate image
orig_rect = self.image.get_rect()
rot_image = pygame.transform.rotate(self.image, self.angle)
rot_rect = orig_rect.copy()
rot_rect.center = rot_image.get_rect().center
rot_image = rot_image.subsurface(rot_rect).copy()
return rot_image
def render(self):
self.screen.fill(self.bg_color)
self.rect.move_ip(0,5) #Y axis movement at 5 px per frame
self.angle += 5 #add 5 anglewhen the rect has not hit one of the window
self.angle %= 360
if self.rect.left < 0 or self.rect.right > self.width:
self.speed[0] = -self.speed[0]
self.angle = -self.angle #tried to invert the angle
self.angle -= 5 #trying to negate the angle rotation
self.angle %= 360
self.screen.blit(self.rotate_image(),self.rect)
pygame.display.flip()
I would really like to know how to invert rotation of a image. You may provide your own examples.
