Re: Threaded drawing
Re: Threaded drawing
- Subject: Re: Threaded drawing
- From: David Duncan <email@hidden>
- Date: Wed, 11 Dec 2013 16:21:10 -0800
- Sun-java-system-smtp-warning: Lines longer than SMTP allows found and truncated.
On Dec 11, 2013, at 4:17 PM, Dave Fernandes <email@hidden> wrote:
> Is there any way to zoom in just one dimension?
Not really. You could put a counter transform before drawing that eliminates the opposite direction (and the aforementioned sample should show how to find out the current zoom level) but thats not really a satisfying solution...
>
> On Dec 11, 2013, at 6:05 PM, David Duncan <email@hidden> wrote:
>
>> On Dec 11, 2013, at 8:05 AM, Jeffrey Oleander <email@hidden> wrote:
>>
>>> * (The posted snippet from sample code was as clear as mud to me. Why powers of 4 (and -4) instead of 5 when we're talking about 5 levels of detail?
>>> 1/(2^2) - 2^2 = (1/4) - 4 means "...levelsOfDetail" should be set to 5?!? It needs more words, more context.)
>>
>>
>> The base level of detail is a zoom level of 2^0 (1 level of detail only allows for a single representation like that). Each additional level of detail is a zoom level half that size smaller (thus a 2nd level if 2^-1x or 1/2x, then 2^-2x or 1/4x, etc). The bias adds to the base level’s exponent, thus a bias of 2 means the base level if 2^2x (4x) zoom instead of 2^0x zoom.
>>
>> There are no powers of 4, (or 5 or any other except for 2). The level of detail is range of the exponent, not the base.
>> --
>> David Duncan
>>
>> _______________________________________________
>>
>> Cocoa-dev mailing list (email@hidden)
>>
>> 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:
>>
>> This email sent to email@hidden
--
David Duncan
_______________________________________________
Cocoa-dev mailing list (email@hidden)
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:
This email sent to email@hidden