i hardly ever dare brag about myself, but here i must say this
(multi-touch) tecnnilogy is so .. 2004 :)
ok, joking, but for inspiration some of you might want to check-out
two projects i worked on with a friend, back in .. 2004.
they're based on a huge multitouch screen we developed using infrared
light and motion-tracking in, mind you, director.
the credits for the great concepts all go to Joes (usemedia),
i developed the user-initeraction system.
http://usemedia.com/?find=Touch+mehttp://usemedia.com/?find=USETEXT,+please+touch
.arri
On 2/15/08, Jacopo Mangiavacchi <email@hidden> wrote:
> Ciao Alessandro,
>
> Thanks, I've seen how easy it is to extend the tool with custom patch
> programming but I'd like to better understand the real focus and
> potential of this gorgeous tool.
>
> I know that some of the work is done at the CPU level, let me say most
> in my sample composition. This is the reason because I'm not sure
> that I correctly use this tool. Of course this doesn't mean that
> coding in Quartz2D or OpenGL automagically move all the workload to
> the GPU but I think that implementing the application flow in code,
> instead of a composition, can give me lot more control about
> performance.
>
> For example, as you have seen in the sample, I use the standard
> Iterator patch to draw the photos but if I need to redraw just one
> sprite, for example because I select it and I want to change his
> border color, it seems to me that I need to execute the entire
> Iteration and redraw all the sprites.
>
> Of course my composition is very basic but what about something more
> tricky. I wonder for example if QC is the right tool to write games
> where you know, performance are so important.
>
> Probably the problem is my background and I have the tendency to
> confuse the compositon pattern with the workflow pattern.
>
> Actually I'm not realy think about games in QC. I'm working let me
> say on some content protection and video mixer solution and QC could
> give me an immense help to build some usability scenario and of course
> could strongly reduce the development cost.
>
> Again, thank you so much for any suggestion,
> jacopo mangiavacchi
>
>
>
>
> On Feb 15, 2008, at 11:21 AM, Alessandro Sabatelli wrote:
>
> > Some work is done on the GPU and some on the CPU. It very much
> > depends on the work involved. As an example, Core Image patches are
> > compiled on the CPU and the execution is attempted on the GPU. It is
> > possible that the host will not be able to execute on the GPU, in
> > which case the work will be done on the CPU.
> >
> > Note that you can render whatever you'd like on the CPU. Take a look
> > at the Histogram Operation developer example and the documentation
> > which covers patch writing.
> > .xX
> >
> > On Feb 14, 2008, at 4:22 PM, Karan Lyons <email@hidden>
> > wrote:
> >
> >> First of all, this is incredibly awesome, especially considering
> >> it's one of your first compositions.
> >> Quartz Composer is pretty good for handling visual stuff, but it
> >> is my understanding that all work is done by the GPU, which
> >> severely limits the work you can do directly in Quartz Composer.
> >> I've done some simple things with Cocoa and QC, and I think that's
> >> your best bet for something that looks great whilst running quickly.
> >> If you're looking for some tutorials or other Quartz Compositions
> >> that you can look at, there are of course the Developer Examples
> >> at /Developer/Examples/Quartz Composer/. Some websites that you can
> >> also check out are http://quartzcompositions.com and Sam Kass' blog
> >> at http://www.samkass.com/blog/
> >> Good luck!
> >>
> >> Namaste,
> >> Karan
> >>
> >> Karan "The Architect" Lyons: Web Design & Development at Geek
> >> Ramblings | Student | Omnigeek
> >> contact | email: email@hidden| cell: 857-544-9527 |
> >> skype: taoofkaran | aim: taoofkaran
> >>
> >>
> >>
> >> On Feb 14, 2008, at 3:48 PM, Jacopo Mangiavacchi wrote:
> >>
> >>> <Surface.qtz>
> >>>
> >>> Hi,
> >>> I'm a newbie in QC with background on microsoft tech like
> >>> silverlight/wpf and xdk. Charmed by the Surface photo browsing
> >>> demo and as a real mac lover I tried to implement a prototype of
> >>> it on QC.
> >>>
> >>> I looked at some other implementations of it, from iPhone to
> >>> several RIA demos (SVG, silverlight etc.), but I figure out that
> >>> Apple multi touch approach is far more than let the user put their
> >>> fingers on the screen, especially big screen. I believe that big
> >>> screen multi touch is very fun and there are lot of stuff you can
> >>> do in QC using tools like the Wiimote but I think that asking the
> >>> user to always hold on their arms is not the real solution for me.
> >>>
> >>> For operation like zoom and rotate I've planned to use the new
> >>> MacBookAir trackpad gesture for pinch, swipe and rotate but in the
> >>> view of the fact that first I don't have a MacBookAir and second
> >>> gesture SDK doesn't seems to be available at the moment I simulate
> >>> the pich effect with the scroll up/down gesture and the rotation
> >>> with the scroll left/right gesture of a MacBook regular trackpad.
> >>> An interesting side effect of this roundtrip by the way is that it
> >>> works even with a mighty mouse, that in some way it also implement
> >>> a sort of multi touch experience.
> >>>
> >>> Well the composition in attach is just a prototype and doesn't
>
> >>> implement all the features of the original demo but there are some
> >>> consideration about the development of it that I'd like to share
> >>> with you.
>
> >>>
> >>> As I just said I'm not a expert at all here and this was really my
> >>> first experience with this tool but I found extreme advantages
>
> >>> from Quartz Composer. I found it a very high level tool, easier
>
> >>> to use then any other traditional development environment and I
>
> >>> believe it implements a real visual approach on graphic
>
> >>> programming. I really appreciate how it's so easy to reuse
> >>> graphic components. Actually I focused only on the script that
> >>> handle user input and move photos, all the graphics effects have
>
> >>> been just copied from the samples in the SDK.
>
> >>>
> >>> It's amazing how it is so easy and transparent to add complex
>
> >>> animation and graphic filtering. I found outstanding how few lines
>
> >>> of code I had to write to build such a user interface prototype.
> >>>
> >>> I really believe that QC has lot of potential but as a newbie I've
> >>> found no book and few stuff on the SDK and on the web helping me
> >>> to understand the potential and the right usage of this tool.
> >>>
> >>> I'm investigating the easy integration with Cocoa Bindings,
>
> >>> DashCode, QuickTime and even Safari but my question is if QC is
> >>> the right tool to build an application like this one or if it
> >>> better to directly code in Cocoa and Quartz2D/OpenGL ? Please
> >>> review the prototype and let me know.
>
> >>>
> >>>
> >>> Thanks in advance,
> >>> jacopo mangiavacchi
> >>>
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