John,

Thanks for your reply.  I'll submit the radar later today.

I'm still curious about elliptical paths and 360 degree arcs.  Do they
always start/end on horizontals, or is there something that I'm overlooking
to have the path start at an arbitrary point?

Gordon


On 9/2/08, John Harper <[EMAIL PROTECTED]> wrote:
>
>
> On Sep 2, 2008, at 10:30 AM, Gordon Hughes wrote:
>
> I guess I had gotten lucky with a previous path animation attempt (a
>> MoveToPoint and EllipseInRect) when I used the paced calculation
>> mode because it worked.  According to the CAKeyframeAnimation Class
>> Reference, although it's available in OS X 10.5, it's not currently
>> implemented.
>>
>
> That is incorrect (probably left over from a prerelease version), paced
> animation should work correctly. If it doesn't, please file a radar, with a
> test case if possible, so we can fix it.
>
>
>> After commenting out the calculationMode property of the path, the layers
>> animate around the arc, but pause briefly at the start/end point of each
>> arc, making the animation anything but smooth.
>>
>
> That is what the "paced" mode is supposed to fix, so what you're seeing
> there is expected. (The distance along each path segment is not linearly
> related to the parametric value)
>
>        John
>
>
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