Not trying to get OT, but I'd like to ask a quick (hopefully simple) question about GL Scissor...
Is it possible to perform a GL Scissor function over a certain range of Z? For instance, to create the effect of anything having a Z of greater than 1 being scissored, but anything under not being affected (or vice versa)? -George Toledo On Thu, Oct 14, 2010 at 11:14 AM, Christopher Wright < [email protected]> wrote: > Now we can use QCPlugInContext methods to know info about the context (as > explained > here<http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/QCPlugInContext_Protocol/QCPlugInContext_Protocol.pdf>). > But.. how can I set its attributes? > Is the context we received in the execution method customizable? Can I > customize PixelFormat attributes or rendering bounds? > > > You cannot. QC manages the context for you (e.g. it creates the context, > and defines the rendering bounds). If your application provides an > NSOpenGLContext or CGLContextObj, you can control those attributes then, but > otherwise they are immutable. You cannot change a context's pixel format > dynamically. > > You can simulate rendering bounds using glScissor(), if you want to draw > less than the full extent of the context. > > Note that the immutability of the context is not a function of > QuartzComposer -- even in normal applications contexts are immutable. It > has always been that way, even on other platforms. > > -- > Christopher Wright > [email protected] > > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > > http://lists.apple.com/mailman/options/quartzcomposer-dev/gtoledo3%40gmail.com > > This email sent to [email protected] > -- George Toledo [email protected] www.georgetoledo.com The information contained in this E-mail and any attachments may be confidential. If you have received this E-mail in error, please notify us immediately by telephone or return E-mail. You should not use or disclose the contents of this E-mail or any of the attachments for any purpose or to any persons.
_______________________________________________ Do not post admin requests to the list. They will be ignored. Quartzcomposer-dev mailing list ([email protected]) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/quartzcomposer-dev/archive%40mail-archive.com This email sent to [email protected]
