[PD] GEM tips
tigital at mac.com
Tue Sep 24 20:15:51 CEST 2002
>Enrique Franco wrote:
>>I have a patch with two balls moving but the movement isn't
>>smooth.....what can I do to optimize the refreshment of the images
>>and get a smoother movement?
...kinda hard to figure out what the smooth-lack problem is without
seeing a patch...
>well, this depends:
>first: do you have a fast graphics card ?
>geforce should be ok.
since it's an ibook, that means it has an ATI card, possibly a rage
128 mobility...but I wouldn't imagine this to be the problem...
>the example patch 07.texture/04.moveImages.pd is a good starting point.
>if the spheres move smoothly, try optimizing your patch
>if they don't, you might have no hw-acceleration.
>if the XServer (i guess osX is Xserver-based...) eats 99% this is
>surely the problem.
well, OS X GEM doesn't use XServer, it is setup to use AGL and the
'aqua'-native windowing system...tho it could be possible now to set
up a link with the Xserver, because XFree86 is now sporting native
opengl acceleration...but I haven't tried it, it's probably buggy,
and apple's windowing system works fine...
>try getting a good card with an appropriate driver.
One can't replace laptop graphics cards, to my knowledge...
>if this patch is ok, you might want to set the refresh-rate of the
>gemwin with a message like "frame 30" (which gives you 30 fps)
>and of course be sure, that you update your movement accordingly:
>a translation by 1 each second will naturally be more jerky than wee
>translations of 0.02 each 50ms.
...did you ever open an official GEM CVS repository? I've got plenty
of changes to file, all OS X-centric, in addition to the
projectBuilder project file...Chris Clepper has been helping out a
bit, and we're wanting to take GEM into YUV processing completely,
instead of RGB (due to decompressor preferences and the new apple GL
extension that allows YUV textures...)
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