Re: Custom path animation for CAShapeLayer
On Sat, 08 Jan 2011 00:07:17 + (GMT), Kenneth Baxter k.b.bax...@mac.com said: Hi, I'm trying to use a CAShapeLayer for some paths in my application. For the most part this works fine, but in some circumstances the animation from one path to another looks really strange during the animation. I would be able to tell it what the path should be at any intermediate point in the animation, but I'm not sure how to get access to it to provide those paths. A path is not a concept that has a natural and obvious interpolation, so I presume you'd need to do the whole animation explicitly e.g. as a keyframe animation. Or maybe you could sort of cheat and animate some other property; you can create your own animatable property such that when you set it, your drawInContext: is called over and over as the value changes, so you could take that opportunity to redraw the path appropriately. m. -- matt neuburg, phd = m...@tidbits.com, http://www.apeth.net/matt/ A fool + a tool + an autorelease pool = cool! AppleScript: the Definitive Guide - Second Edition! http://www.apeth.net/matt/default.html#applescriptthings___ 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
Re: Custom path animation for CAShapeLayer
On Jan 7, 2011, at 4:07 PM, Kenneth Baxter wrote: Hi, I'm trying to use a CAShapeLayer for some paths in my application. For the most part this works fine, but in some circumstances the animation from one path to another looks really strange during the animation. Core Animation's path animation requires the source and destination paths to be of the same structure – that is you can animate between two lines, or two beziers but not from a line to a bezier (as such – you can generate degenerate bezier curves that look like lines to emulate this). If your source destination paths do not meet this requirement, you may get unexpected results. I would be able to tell it what the path should be at any intermediate point in the animation, but I'm not sure how to get access to it to provide those paths. The closest thing you could do here is use a Keyframe animation, but I'm not certain this could be done cleanly or without using lots of intermediate paths for even short sequences. It is something to explore. -- David Duncan ___ 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
Re: Custom path animation for CAShapeLayer
Thanks for the feedback David. I'll try the keyframe approach. On 11 Jan, 2011,at 09:24 AM, David Duncan david.dun...@apple.com wrote: The closest thing you could do here is use a Keyframe animation, but I'm not certain this could be done cleanly or without using lots of intermediate paths for even short sequences. It is something to explore. -- David Duncan ___ 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
