Thanks again for your suggestion of using primitive restart. This is quite interesting.
I have read the spec and I am not sure I can specify multiple consecutive restart indices, eg.
...

Do you mean the following:



This seems to be a nice idea, thank you.

Right now, since I'm only generating triangle strips (in fact) with 4 vertices, I'm generating GL_QUADs instead. Nvidia's...

It's a bit more effort to write a batch of 3 indices on a 12-byte boundary than it is on a 16-byte (ie. vec4) boundary.

Hi,

I'm generating a VBO and EBO from a compute shader, after which I'm issuing a call to glDrawElements. Every vertex data is aligned on a 16-byte boundary making it convenient for the compute...

Things have settled down. The code was pretty much going berserk before, and calling glBindBuffer was, I believe, randomly making it work.
glBindBuffer(GL_TEXTURE_BUFFER) is not needed. The compute...

The following code works, but I am unable to say why:



if (textureID == -1)
{
// Create TBO on demand, if needed
textureID = GL11.glGenTextures();
...

I located the error, it is here:



if (textureID == -1)
{
// Create TBO on demand, if needed
textureID = GL11.glGenTextures();
GL11.glBindTexture(GL31.GL_TEXTURE_BUFFER, textureID);
...

Hi,

I need to fill in a VBO and an EBO as part of the execution of a compute shader. My scenario is a dynamic tessellation scenario where the usual hardware tessellation shaders are not sufficient...

I had started a thread about this issue a year ago, but this didn't go very far
http://www.opengl.org/discussion_boards/showthread.php/176164-Probable-nVidia-GLSL-compiler-bug

You do need to call return as well to cancel execution. IIRC, AMD drivers abandon shader execution upon discard, whilst nVidia drivers don't. The OpenGL spec does not define a specific behavior.

Hi,

Anybody knows what this extension is for? Is this some kind of progressive occlusion query, a desired functionality that has been discussed last year on this forum?

Thanks,
Fred

Thanks a lot for your insight Ilian.

Hi there,

I have asked this question before on this forum but the question was not very well presented, buried inside a thread on another topic.

I'm trying to see if it is faster to

a) load...

Code A)


voir *new_data = malloc(new_data_size);
writeDataInto(new_data);
glBufferData(target, new_data)

Code B)

Strictly speaking I don't believe this is the case, otherwise this would mean things are very unoptimized. Consider the following scenario:

glBufferData(large_buffer)...

Hi,

Is there a way to be notified that a buffer transfer is complete with OpenGL?
As part of a simple test that I am doing this weekend, I have the following code:

for (int n=0; n < 50; n++)...

Well, they are two different contexts. They can be bound at the same time, so this could work, couldn't it?

My scenario would be the following:

At application start:
- create and bind a CUDA...

Sweet, I will give this a shot.

Thank you.

Hi,

I have a situation in which I really need OpenGL rendering and CUDA calculations to run in parallel, completely decoupled. They really *need* to run in parallel, from an application, and even...

Hi,

In a fragment shader I'm trying to calculate the mipmap level of a texture for the current fragment. To be more specific, my texture is not a real texture per se but a structure organized like...

Quite note, for what it's worth: the new Catalyst 12.4 drivers do not solve my problem on the AMD platform (program freezes).

Thanks both of you for your replies.

Lately I have been unable to run my shaders on AMD hardware, they just hang, and indeed cause a graphic driver recovery (my AMD card is on a Win7 box). 1-2...

Hi,

Under Windows XP (not Windows 7), when there is a GLSL bug or an infinite loop inside a shader, for instance, a Blue Screen Of Death (BSOD) shows up, causing a reboot. Sometimes, when I'm...

Hi,

My application performance is mainly affected by what I'm doing in my shaders. These shaders really do a very large amount of work (maths, access the whole GPU memory and so on).

I use low...

There is no bottleneck, I'm just doing an awful lot of processing.

STATIC_DRAW and DYNAMIC_DRAW have no difference it seems, in terms of performance. I said there was no difference in performance...