Re: issues for VJ apps with Quartz Composer

• Subject: Re: issues for VJ apps with Quartz Composer
• From: Tom Birch <email@hidden>
• Date: Wed, 4 May 2005 23:27:11 +1000
• Delivered-to: email@hidden
• Delivered-to: email@hidden

On 04/05/2005, at 23:05:11, Roger Bolton wrote:

they are all using GWorlds so slow performance but hopefully updates
soon.  Can the faster "Quicktime visual context" mode be used if an
App
is written in Carbon and C or is this option only available to Cocoa
Objective C apps?

afaik all the interfaces to QCRenderer which is what you'd use to
render a composition manually, are written in Objective C, so you'd
need to use this for your apps, but I don't see any reason why that
would be a problem.

unfortunately the issue is that most VJ applications that already exist
are not written in Cocoa so it's a case of trying to bolt it on somehow.

can one Quartz Composer patch feed it's result into a second patch
as a
texture stream?

yes, you just need to enclose a composition in a "Render In Image"
macro for it to output its result as an image, which can then be used
in any image input

just to clarify I mean having two completly seperate compositions and a
host application is bridging texture streams between them on the fly to
build effects chains. I know how to do this inside one composition already.

Thanks very much for the info

no problem! :D

Roger
Eskatonia Visuals

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