On Feb 16, 2010, at 11:18 PM, Kalyanraju M wrote: > I am trying to implement Ken-burns effect for iPhone. Implemented Zoom-In And > Zoom-Out. Got struck while implementing "Panning". > > Any ideas to implement "Panning".
Panning's just changing the x/y offset, while zooming changes the x/y scale. So figure out a position to start and end, and interpolate between them based on the time elapsed. fract = (now - startTime) / totalTime x = x0 + fract*(x1-x0) y = y0 + fract*(y1-y0) scale = scale0 + fract*(scale1-scale0) then construct a transform based on x,y and scale, and set that. —Jens_______________________________________________ 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
