Why doesn't QT accept the Shading and the Lightning Features of OpenGL?

[taulant01]

Hi guys,

I am trying to create an Object in QT with OpenGL. I found a code that's in OpenGL and it works fine, it has Lighting sources, Shading and the object.

The Interesting thing is that, in the C++ code that I downloaded, the program works perfectly, the Object appears with a shiny material, the shading works perfect and the light source also.

I took and copy the code into a QT project, it is the same except I didn't add the Keyboard handling, because I don't need them. And in the QT project, the object is WHITE. No shading, no light nothing!

Here are the pictures of the QT project and the original OpenGL project:

Original Project - Image

QT Project - Image

I am new in QT and I really don't understand why the code isn't working ?

Does anybody have any idea why it isn't working?

[mrjj]

Hi , Im no expert on opengl but I think the old code used stuff from fixed pipeline times
and qt expects shaders as its modern opengl.

If you look at
http://doc.qt.io/qt-5/qtgui-openglwindow-example.html

they use
glVertexAttribPointer and other moden constructs.

But its just a guess.

[taulant01]

@mrjj , can you please explain to me which are these "fixed pipeline times"... because I really can't understand what should I do with the link that you sent me :(

I checked these glVertexAttribPointer, but what should I do with them?

I am new in QT and in OpenGL, sorry for not understanding you

[mrjj]

@taulant01
Sorry for not being clear.
I think the sample uses old opengl calls for lighting and textures.

The old way is called fixed pipeline. And new is called modern/programmable pipeline.

Most (older) samples use the fixed style and it just don't work nowadays.

please read
http://www.gamedev.net/topic/466751-fixed-pipeline-vs-programmable-pipeline/

For good info to learn opengl (modern)
http://www.opengl-tutorial.org/