Hello,

I'm really struggling to grasp the thinking behind OpenGL ES 2.0, and the lack of immediate mode and push/pop matrix.

Usually, when rendering a scene in OpenGL I would do something like...

Nevermind, I managed to work it out myself:

Matrix4 matrix = new Matrix4();
GL.GetFloat(GetPName.ProjectionMatrix, out matrix.Row0.X);

float left = - (1f...

Hello,

Suppose I set an orthog projection :

GL.Ortho(0, 800, 800, 0, -1, 100);

I can then read back the projection matrix using:

GL.GetFloat(GetPName.ProjectionMatrix,...);

Woot! The fresh install did the trick. Full support up to 2.1, and 70% at 3.0.

Well, I'm going to have one last-ditch attempt: I'm going to pop to the shops now to buy a 4gb USB stick so that I can reinstall Windows 7. I will then attempt to freshly install the intel drivers,...

I've wasted a whole day trying to get this to work now, and I've come to the conclusion that Intel HD + my current chipset simply does not support OpenGL properly. Everything indicates that the...

I'm running windows 7, 64 bit.

I'm running OpenGL extension viewer. It says I only have OpenGL 1.1 supported.

I've installed the latest drivers from Intel in 3 separate different ways, all...

Hello, I just bought a brand new Sony VAIO VPCY21S1E laptop with an Intel HD Graphics card, however the machine is nearly totally useless to me because it does not appear to support basic OpenGL...

Thanks very much Jan. Unfortunately texture_non_power_of_two.txt doesn't really talk about performance.

As a bit of background, let me explain my reasoning for wanting NPOTs: the game I'm...

<quote>The main reason to still keep an eye on POT dimensions is performance. NPOT textures are a bit slower, because the GPU needs to do more computations.</quote>

How much slower? Also, when...

In the past I used to pack my textures into POTs, however I'm told that this is fairly redundant with NPOTs supported by most cards.

So, what exactly are the limitations of NPOTs? - I know they...

Heh, I could have sworn that existed, however after 15 minutes of googling for "opengl colour mask" and not finding it, I concluded that I was imagining things and it didn't actually exist. I blame...

I have a texture that is a render target which has an alpha channel. I'm trying to get an effect where objects leave a trail when drawn. The idea would be to render to a texture T, and then, instead...

Here's what I would like to do:

I have some texture which has an alpha layer. Let's, for argument's sake, say that it is an image of a tree with backround having an alpha value of 0.

Firstly,...