Re: [pygame] Rotation of image

[Tom Wardill <tom@xxxxxxxxxxxxx>]

On Sat, 2006-04-08 at 10:04 -0700, Peter Shinners wrote:
> On Sat, 2006-04-08 at 17:36 +0100, Tom Wardill wrote:
> > I need the ship image to rotate so it always faces the centre.
> > I've tried doing:
> > self.image = pygame.transform.rotate(self.image, -dTheta)
> > (where dTheta is the angle to rotate) but this destroys the image, and
> > does some very strange things with the movement of the ship.
> 
> Rotation is a lossy transformation. To rotate an image once isn't too
> bad, but multiple rotations will eventually chew up the original.
> 
> The solution you will want is to always hang onto the original and
> rotate from that. You may look at pygame.transform for a more filtered
> rotation.
> 
> self.totalRotate -= dTheta
> self.image = pygame.transform.rotate(self.original, self.totalRotate)
> 
> If you are already framiliar with OpenGL in C, you can use the PyOpenGL
> package that lets you do glRotate just like in C.
> 
> 
> 
> 

Just tried that rotate, it works great. Thanks for your help!
--
TomW