Problem compiling the OpenGL es2 example code

[wacol]

I am trying to compile the "hellogl_es2" sample code in FREMANTLE target with the following errors. I am not sure if my setup is missing or with out dated header files? These functions seem missing from "gl2.h".

src/glwidget.cpp: In member function 'void GLWidget:aintQtLogo()':
src/glwidget.cpp:84: error: 'GL_VERTEX_ARRAY' was not declared in this scope
src/glwidget.cpp:84: error: 'glEnableClientState' was not declared in this scope
src/glwidget.cpp:85: error: 'glVertexPointer' was not declared in this scope
...


I have following declare in my .pro file
QT += opengl
LIBS += -lGLESv2 -lQtOpenGL

I have been struggling with this for a couple of days! please any help would be appreciated.
thx,

[newscape]

I have the same problem but it's normal. OpenGL ES v2 doesn't include these functions (GL_VERTEX_ARRAY, glEnableClientState...).
It's possible to compile a project with OpenGL ES 1 adding lGLES_CM to LIBS.
But I dont' know if it's possible to execute a such program on N900.

[divanov]

hellogl_es2 example from Qt 4.6 compiles with Qt 4.6 fine:
http://qt.gitorious.org/qt/qt/trees/...gl/hellogl_es2
You can notice the source is different from what you are trying to compile.

[wacol]

Thanks, the sample code in your link is indeed different, and looks a lot more promising.
However, I am missing some header files: <qvector3d.h> <qmartix4x4.h> <gglshaderprogram.h>.
Are these included in the qtcore or qtui lib? They are not in my qt4.6 lib/inc?

In case some else has the same problem, the wiki page blow has a link to the wrong hollegl_es code.
http://wiki.maemo.org/OpenGL_ES_Libraries

[divanov]

Thanks, the sample code in your link is indeed different, and looks a lot more promising.
However, I am missing some header files: <qvector3d.h> <qmartix4x4.h> <gglshaderprogram.h>.
Are these included in the qtcore or qtui lib?

$ rpm -ql qt-devel-4.6.0-3.fc13.x86_64 | grep -E "(qmatrix4x4|qvector3d|qglshaderprogram)"
/usr/include/Qt/qglshaderprogram.h
/usr/include/Qt/qmatrix4x4.h
/usr/include/Qt/qvector3d.h
/usr/include/QtGui/qmatrix4x4.h
/usr/include/QtGui/qvector3d.h
/usr/include/QtOpenGL/qglshaderprogram.h

In case some else has the same problem, the wiki page blow has a link to the wrong hollegl_es code.
http://wiki.maemo.org/OpenGL_ES_Libraries

This is Qt 4.5.x example, so it has to be compiled with Qt 4.5.x.

[wacol]

Thanks, what .deb package this is in? I am a linux newbie using Ubuntu

This is Qt 4.5.x example, so it has to be compiled with Qt 4.5.x.

I am just trying to lean something, so correct me if I'm wrong. The 'glEnableClientState' is OpenGL ES 1.x api, I thought this is incompatible with ESv2. How does Qt 4.5 or 4.6 affect the compiler error?

[divanov]

Thanks, what .deb package this is in? I am a linux newbie using Ubuntu

If you are using Ubuntu, then this is offtopic as this sub-forum is about Maemo. The same command on Maemo:

dpkg -L libqt4-maemo5-dev | grep -E "(qmatrix4x4|qvector3d|qglshaderprogram)"
/opt/qt4-maemo5/include/Qt/qmatrix4x4.h
/opt/qt4-maemo5/include/Qt/qvector3d.h
/opt/qt4-maemo5/include/Qt/qglshaderprogram.h
/opt/qt4-maemo5/include/QtGui/qmatrix4x4.h
/opt/qt4-maemo5/include/QtGui/qvector3d.h
/opt/qt4-maemo5/include/QtOpenGL/qglshaderprogram.h

I am just trying to lean something, so correct me if I'm wrong. The 'glEnableClientState' is OpenGL ES 1.x api, I thought this is incompatible with ESv2. How does Qt 4.5 or 4.6 affect the compiler error?

It's in Open GL since version 1.1. Different versions are using different includes.