Thanks for the quick response! I've mostly been reading trying to see what would work. I did mess with changing the anchorPoint to get the initial animation route, but that didn't seem to suffice.
The object I'm animating is a simple UIView containing an image. I thought about the timer approach like you mention, the reason I shy'd away from it was that it needs to stay in sync with another animating object (in my ferris wheel example this would be the wheel itself.) But now that I think of it I might be able to use the timer to animate that as well so they do stay in sync. Does that seem like the best and/or easiest approach? On Thu, Jun 4, 2009 at 8:40 PM, Graham Cox <graham....@bigpond.com> wrote: > > On 05/06/2009, at 1:34 PM, Miles wrote: > > I am trying to figure out the easiest way to make an object animate around >> a >> circle, but preserve it's orientation. Much in the way that a seat on a >> ferris wheel would look as it goes 'round. >> I assume there's a pretty simple solution, but I haven't thought of it >> yet. >> > > > Well, what have you tried so far? > > This is simple on the face of it - you just compute the x, y coordinates of > the object and increment the angle using a timer or something. Or did you > mean specifically within an animation technology such as Core Animation? > What is the "object". It's all a bit vague... > > position.x = origin.x + radius * cos( angle ); > position.y = origin.y + radius * sin( angle ); > [object setPosition:position]; > > > > --Graham > > > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
