Re: newbie needs quickdraw help
Re: newbie needs quickdraw help
- Subject: Re: newbie needs quickdraw help
- From: Urs Heckmann <email@hidden>
- Date: Thu, 28 Nov 2002 17:39:14 +0100
Hi John,
nah, it's quite obvious that OpenGL is much faster than CG. On the
other hand, especially for a newbie, it's easier to use CG.
However, I think my tiny Framework can easily be adapted to use OpenGL
instead of CG. Said, though I only have some experience in using
OffscreenContexts which is slower but still faster than anything else.
It all depends on what you want to do. Painting 2x 48.000 samples per
second per instance as lines is kinda, umm, not so useful whereas
updating a 256 x 256 pixel area @ 10Hz with 2 differently coloured,
bandwidth optimized curves (right/left) seems to be a viable goal with
either approach.
Cheers,
;) Urs
Am Donnerstag, 28.11.02, um 17:09 Uhr (Europe/Berlin) schrieb john:
Hi Urs,
I had found that CoreGraphics was pretty slow when drawing many lines
(say around 2000). I think CG's lines look better (especially the
antialiasing!), but I also find OpenGL can render 20,000 lines in less
time than CG can do 2000, even with OpenGL's antialiasing enabled.
Have you had different results? I'd rather use CG...
-- John
Hi,
I still have the totally outdated and undocumented but still working
version 0.1 of my AU Graphics Framework on my page:
http.//www.u-he.com/CAUGui0.1.dmg (ctrl-click and save to disc or
curl for it)
It utilizes CoreGraphics drawing and thus can easily manage fast
anti-aliased line drawing.
The latest version will be out when I get it all working in real life
situations (== new AudioUnits) and can provide some docs. It has some
support for GUI-DSP communication built in for VU Meters, so if you
need it, just mail me directly.
Cheers,
;) Urs
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