OpengGL Shader Program fails
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Yes it is but what is the code about ?
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[quote author="sasmaster" date="1316083047"]
I am getting no shader program errors either .Everything compiles and runs OK .But the display is empty.[/quote]Sorry for lateness, I am looking at your code, first question, why did you enable GL_LIGHTING/GL_LIGHT? That's fixed pipeline stuff.
Second look, GL_MODELVIEW and GL_PROJECTION matrices, you don't have that also in programmable pipeline. You have to do it yourself in vertex shader. Yes, there is option to set the matrices and access them in shader, but all of the multiplying you have to do it yourself.
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Those are remnants from my previous trials.I don't think those influence the modern pipeline as I am using a compatibility mode .So those should be discarded by the OpenGL. Regarding the matrices ,you can see that I load a orthogonal projection matrix into the vertex shader on each render loop. Still nothing works.If anybody could put a full example on how to write a OpenGL 3x in Qt it could be really helpful to many people I believe :)
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Hey, I have example, http://minimoog.wordpress.com/2010/05/10/transfverteksi/ Oh, I am sorry it's in my native language (if it is for somebody interesting I would translate/write in english) but code is simple for understanding http://dl.dropbox.com/u/6108964/QtGL2.zip
BR.
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Also you can use it for learning basic usage of VBO. :)
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[quote author="sasmaster" date="1316340394"]I can see you didn't define the format and it actually works ?Another question ,are those inclosed GLEW headers and sources used in your program? [/quote]
By format you mean 'window framebuffer pixel format'?
Yes, it's using GLEW, since there are glGenBuffers, glBindBuffers, glBufferData, glVertexAttribPointer etc.
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[quote author="sasmaster" date="1316343899"]But why haven't you used the Qt version of those methods?[/quote]
You mean QGLBuffer. Well at that time there was no QGLBuffer.
[quote]By Format I mean the QGLFormat.[/quote]
It uses default format. I don't see why would I need a fancy format for that code. :)
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An idea (maybe wrong...) : Implementation of openGL is platform (hardware) dependent. So I guess it could permit an universal call through various platforms or OpenGL revision (and avoid use of OGL extension which I used to add on mac OS platform for exemple).
Nervertheless I prefer use pure OpenGL functions call as long as OGL 4.0 (and so OGL ES 2.0) will not be supported anywhere...