Hey,

I (an OpenGL novice) am writing a small app to visualize meshes used for numerical computations. I developed this using GLSL 1.30 (on OpenGL 4.4, it turns out I was using), but it looks like I need to move to GLSL 1.50 (on OpenGL 3.2, using just the core profile) to help one of our Mac users out.

I thought this wouldn't be a big deal, I just switched out the #version 130 with #version 150 and declared the gl_FragColor in the fragment shader (which was previously undeclared) as an out. But now nothing is drawn, the frame contains only the background color (white).

My shaders:

• Fragment
• Vertex

Other code that might be of interest:

• OpenGL initialization.
• Main drawing code
• Per-object drawing code

Have I inadvertently used a feature not available on OpenGL 3.2? I find that a bit hard to believe since I don't get any error messages, just blank space...

I regret that there are quite a few Qt-isms that might cloud the OpenGL layer behind it, but it should be clear enough I hope.

Also you will have problems compiling this if you try because you'll need GoTools, which you probably don't have.