View Profile: thokra - OpenGL Discussion and Help Forums

Yesterday, 01:58 AM

thokra replied to a thread OpenGL points and lines in Items of Importance to the OpenGL Community

First of all, please read the forum rules on how to format your posts - especially pieces of code. Can you post a screen shot of what's rendered?

3 replies | 172 view(s)

01-02-2013, 08:23 AM

thokra replied to a thread using multiple textures in OpenGL coding: beginners

It's not a call list, it's a display list. And yes, you can switch the texture unit inside a display list. An access violation is not the result...

6 replies | 277 view(s)

01-02-2013, 07:50 AM

thokra replied to a thread Determine the texture target from the GLuint in OpenGL coding: advanced

I would suggest the appropriate sub-forum but I don't think there is much evidence for anything in there having an actual effect. It would be nice to...

6 replies | 285 view(s)

01-02-2013, 06:39 AM

thokra replied to a thread Determine the texture target from the GLuint in OpenGL coding: advanced

Could be a valid addition to the API though. Not that I would use it, but since the GL in some way has to keep track of the target as soon as you...

6 replies | 285 view(s)

01-02-2013, 05:59 AM

thokra replied to a thread Determine the texture target from the GLuint in OpenGL coding: advanced

I don't think there is one - oddly enough - but should be trivial to implement. I guess you'll have to store the info on the application level.

6 replies | 285 view(s)

12-24-2012, 08:49 AM

thokra replied to a thread problem when switching color buffer for reading in OpenGL under Windows

That is complete nonsense.

4 replies | 324 view(s)

12-24-2012, 06:41 AM

thokra replied to a thread Updating uniforms between sets of primitives in OpenGL coding: beginners

Setting constant memory values is possible at any time while a shader program is active. It has nothing to do with the bound VBO or VAO. You can go...

2 replies | 274 view(s)

12-24-2012, 06:27 AM

thokra replied to a thread problem when switching color buffer for reading in OpenGL under Windows

One question: Why do you need Microsoft's implementation?

4 replies | 324 view(s)

12-23-2012, 06:22 AM

thokra replied to a thread Simple convolution question in OpenGL coding: advanced

And you think this is due to the sub-forum you chose? Do you think you'll get more answers by cross-posting? Please read the forum guidelines.

4 replies | 364 view(s)

12-23-2012, 05:49 AM

thokra replied to a thread Simple convolution question in OpenGL coding: advanced

How is this different from the question you asked in the beginner's forum? Don't cross post. Don't ask the same question in a different forum a few...

4 replies | 364 view(s)

12-20-2012, 10:51 AM

thokra replied to a thread OpenGL for counter strike 1.6 not working on windows 8 in User Hardware, Software, & Gaming Help

Well, I'd simply do it then and see what happens.

3 replies | 996 view(s)

12-20-2012, 09:03 AM

thokra replied to a thread Problem with "layout" Syntax in OpenGL coding: beginners

First of all, the HD4000 GPU is integrated in an Ivy bride CPU which supports OpenGL 4.0 on Windows so you should definitely update your drivers....

7 replies | 465 view(s)

12-20-2012, 07:44 AM

thokra replied to a thread Problem with "layout" Syntax in OpenGL coding: beginners

As I said, if your implementation (i.e. the GL implementation that comes with your driver) does not expose GL_ARB_explicit_uniform_location your out...

7 replies | 465 view(s)

12-20-2012, 07:23 AM

thokra replied to a thread Problem with "layout" Syntax in OpenGL coding: beginners

GL_ARB_explicit_attrib_location and GL_ARB_explicit_uniform_location are only available in GL 3.3 and 4.3 respectively or if the extension is...

7 replies | 465 view(s)

12-19-2012, 02:45 AM

thokra replied to a thread get the currently bound VAO? in OpenGL coding: beginners

Why don't you keep track of the currently bound VAO yourself? struct BufferBindings { GLuint previous; GLuint current; }; // INIT -...

3 replies | 343 view(s)

12-19-2012, 02:04 AM

thokra replied to a thread intel map texture extension in OpenGL coding: advanced

It's like mapping buffer data, only in case of textures you have to select a mip-map level and can provide pointers to retrieve the stride and layout...

1 replies | 286 view(s)

12-17-2012, 01:54 PM

thokra replied to a thread Shadow Mapping and Shadow2DProj in OpenGL coding: beginners

Can you absolutely verfiy that the depth texture still works?

5 replies | 424 view(s)

12-17-2012, 02:37 AM

thokra replied to a thread OpenGL forum upgrade April 25th at 4AM PST in Items of Importance to the OpenGL Community

I just noticed that using code tags which are set in italics are completed automatically and form the following: ''I would use QT for window/input...

116 replies | 20708 view(s)

12-17-2012, 02:33 AM

thokra replied to a thread GLFW / SDL vs QT in OpenGL coding: beginners

I would use QT for window/input management and possibly for an ingame GUI. I've used Qt extensively fr the past years and it's quite good for GL...

4 replies | 441 view(s)

12-17-2012, 02:28 AM

thokra replied to a thread OpenGL for counter strike 1.6 not working on windows 8 in User Hardware, Software, & Gaming Help

Are your drivers stock from Windows 8 or did you install a GFX driver yourself?

3 replies | 996 view(s)

12-17-2012, 02:18 AM

thokra replied to a thread Shadow Mapping and Shadow2DProj in OpenGL coding: beginners

FloatBuffer biasMatrix = (FloatBuffer)BufferUtils.createFloatBuffer(16).put(biasValues).flip(); Does flip() transpose the matrix returned by put()...

5 replies | 424 view(s)

12-14-2012, 06:52 AM

thokra replied to a thread Quaternion-based camera still has gimbal lock. in OpenGL coding: beginners

Yes, you're absolutely correct. I should have been more precise.

5 replies | 366 view(s)

12-14-2012, 05:54 AM

thokra replied to a thread MultiTexturing/GLSL in OpenGL coding: beginners

Could you please state what's going wrong? What are we looking for here?

4 replies | 374 view(s)

12-14-2012, 03:22 AM

thokra replied to a thread Redbook 8th sample code? in OpenGL coding: beginners

What actual problem do you have? I think we can help.

9 replies | 663 view(s)

12-14-2012, 02:51 AM

thokra replied to a thread Quaternion-based camera still has gimbal lock. in OpenGL coding: beginners

Mathematically, gimbal lock using quaternions is impossible. If you still get similar problems, you're doing it wrong. EDIT: BTW, where do you...

5 replies | 366 view(s)

12-13-2012, 01:54 AM

thokra replied to a thread GLUT app not running in GPU in OpenGL Toolkits (e.g. GLUT, GLFW, GLM)

You're neither running on the Intel nor on the NVIDIA GPU. If the vendor is Microsoft, something's terribly wrong with your drivers.

1 replies | 348 view(s)

12-12-2012, 04:52 AM

thokra replied to a thread A baffled beginner not quite sure where to start in OpenGL coding: beginners

One thing you have to bare in mind: It may make sense to target Sandy Bridge and Ivy Bridge CPUs (which also integrate a GPU) and possibly multiple...

7 replies | 523 view(s)

12-12-2012, 04:31 AM

thokra replied to a thread A baffled beginner not quite sure where to start in OpenGL coding: beginners

The simple answer is: Don't write for GPUs that don't support at least OpenGL 3.0 (DX10 class hardware). Valve's hardware survey among Steam...

7 replies | 523 view(s)

12-12-2012, 02:25 AM

thokra replied to a thread Sampler variable for SNORM textures in OpenGL coding: beginners

As I said, floating-point samplers should work fine. What result do you expect and what result do you get? GL_BYTE denotes a signed integral type...

5 replies | 460 view(s)