Re: iOS OpenGL ES woes
David, BTW, is it possible to add subviews to a CAEAGLLayer backed view? I have been fighting all day to show a progress indicator atop this backed view, in vain. Thanks! Vincent ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS OpenGL ES woes
On Jul 3, 2013, at 10:08 AM, Vincent Habchi vi...@macports.org wrote: David, BTW, is it possible to add subviews to a CAEAGLLayer backed view? I have been fighting all day to show a progress indicator atop this backed view, in vain. Yes, as long as you wrap the CAEAGLLayer with a UIView (override +layerClass), then you can add subviews to that view to your hearts content. -- David Duncan ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS OpenGL ES woes
David, Yes, […] Thanks for your quick answer and your kindness, as usual! Then something is wrong with my setup, I’ll investigate further. Have a great day! Vincent ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
iOS OpenGL ES woes
Hi folks, I am trying to develop a demo application (DEM viewer) on iOS for educational purposes. I am fairly fluent with OpenGL but this my first try at an iOS app (I usually do OS X development). My problem is that albeit I seem to have abided by all terms of what’s described in the ‘Drawing with OpenGL ES’ document, nothing appears on screen. I create a window/view controller/view with an opaque CAEAGLLayer. I alloc everything, EAGLContext, frame buffer, render buffer, call [_glContext renderBufferStorage:fromDrawable], etc. check if my frame buffer is complete (it is) and eventually I just try to clear the display to blue via a glClearColor (0, 0, 1, 1) in the -viewDidLoad: method (calling glFlush () immediately after). Nothing happens (on the simulator): I get a white screen. I have fiddled with some controls in IB, but to no avail. Has anybody any hint? Thanks! Vincent ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS OpenGL ES woes
Uh, I just realized I had overlooked the call to EAGLContext presentRenderbuffer. It should work better when I add it. Sorry for the noise, but this is a bit confusing at start! Vincent ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS OpenGL ES woes
On 2 juil. 2013, at 17:54, Vincent Habchi vi...@macports.org wrote: Uh, I just realized I had overlooked the call to EAGLContext presentRenderbuffer. It should work better when I add it. It doesn’t work even with that call added. I don’t really grasp when the CAEAGLLayer gets somehow hooked to the render buffer. Maybe I should ask on the OpenGL list instead. Vincent ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS OpenGL ES woes
Honestly my first question would be why not use GLKit (which the Xcode OpenGL ES template should be using by default) instead? It pretty much sets up all the expected bits for you. On Jul 2, 2013, at 12:46 PM, Vincent Habchi vi...@macports.org wrote: On 2 juil. 2013, at 17:54, Vincent Habchi vi...@macports.org wrote: Uh, I just realized I had overlooked the call to EAGLContext presentRenderbuffer. It should work better when I add it. It doesn’t work even with that call added. I don’t really grasp when the CAEAGLLayer gets somehow hooked to the render buffer. Maybe I should ask on the OpenGL list instead. Vincent ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/david.duncan%40apple.com This email sent to david.dun...@apple.com -- David Duncan ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS OpenGL ES woes
Hi David, I made it work eventually. I just figured out both the frame buffer and the render buffer must be bound before drawing. Now I have a fine blue screen, so I guess I can go ahead after a good sleep. :) Honestly my first question would be why not use GLKit (which the Xcode OpenGL ES template should be using by default) instead? It pretty much sets up all the expected bits for you. I use the GLKit for matrix operations. It is very handy. But I like being able to tinker with OpenGL the hard way: I begun as a assembly kernel programer, I still appreciate low level APIs over higher abstractions! Just a further question: on a CAEAGLLayer backed view, [view setNeedDisplay] does nothing, doesn’t it? Thanks for your answer! Vincent ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS OpenGL ES woes
I found it helpful to start with a working sample code app. GLSprite was my mentor. David On Jul 2, 2013, at 12:46 PM, Vincent Habchi vi...@macports.org wrote: On 2 juil. 2013, at 17:54, Vincent Habchi vi...@macports.org wrote: Uh, I just realized I had overlooked the call to EAGLContext presentRenderbuffer. It should work better when I add it. It doesn’t work even with that call added. I don’t really grasp when the CAEAGLLayer gets somehow hooked to the render buffer. Maybe I should ask on the OpenGL list instead. Vincent ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/rowlandd%40sbcglobal.net This email sent to rowla...@sbcglobal.net ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: iOS OpenGL ES woes
On Jul 2, 2013, at 1:15 PM, Vincent Habchi vi...@macports.org wrote: Just a further question: on a CAEAGLLayer backed view, [view setNeedDisplay] does nothing, doesn’t it? Correct. You'll get a log along the lines of -display does nothing in the console. -- David Duncan ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
