GLenum use of undeclared identifier bug in Xcode

akilone · wrote on 23 Jun 2015, 19:10

I started doing Qt project in Visual Studio 2013, then I wanted to port project to Xcode on Mac. But I have problem compiling it in Xcode, strange error appears: Use of undeclared identifier 'GL_PRIMITIVE_RESTART_FIXED_INDEX' .

I check all of includes, I don't know what else can be source of error. As I mentioned, everything compiles fine in Visual Studio 2013. Every other GLenum seems to work, but GL_PRIMITIVE_RESTART_FIXED_INDEX is not recognized. Is there difference between version for Mac and PC?
I should mention that I use Qt's OpenGL functionality.

Thanks

SGaist · 24 Jun 2015, 13:04

Hi and welcome to devnet,

Which version of Qt and Xcode are you using ?

Difference in OpenGL between OS X and Windows ? Sure there is, both OS offer different support for it that Qt tries to leverage so that you don't have to go into the gory details.

akilone · S SGaist 23 Jun 2015, 21:22

Hi, I'm using Qt 5.4 and Xcode 6.

SGaist · wrote on 24 Jun 2015, 22:26

Just checked, GL_PRIMITIVE_RESTART_FIXED_INDEX comes with OpenGL 4.3 and currently it seems that OS X 10.9 and 10.10 are implementing OpenGL 4.1

akilone · wrote on 25 Jun 2015, 16:20

Thanks @SGaist.

Is there alternative to functionality of GL_PRIMITIVE_RESTART_FIXED_INDEX? I need to draw multiple geometric primitives (for example few triangle strips for cylinder), and I did it by passing list of all indices and restarting index with null element in list. How can I have same functionality in OpenGL 4.1?

SGaist · wrote on 25 Jun 2015, 21:05

Sorry, I don't know OpenGL well enough to propose you an alternative/workaround to emulate that behavior.