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Dark Photon
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Dark Photon
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Yesterday,
10:10 AM
Dark Photon
replied to a thread
deferred spotlight shadow map value issues
in
OpenGL coding: advanced
Fundamentally, you're not doing anything different (same source and destination spaces in your transformation chain). The only thing you do is...
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7 replies | 410 view(s)
Yesterday,
09:31 AM
Dark Photon
replied to a thread
Ask for examples of the orange book "OpenGL Shading Language"
in
OpenGL Shading Language
Ah! Here you go. Found a copy of them with a web search. Grab 'em quick :D. Also, though the sizes match, I wouldn't run any executables from this...
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3 replies | 118 view(s)
Yesterday,
09:29 AM
Dark Photon
replied to a thread
Ask for examples of the orange book "OpenGL Shading Language"
in
OpenGL Shading Language
That's odd. They used to be up here: http://3dshaders.com, which is noted in the preface to the 3rd edition (published July 2009). But they...
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3 replies | 118 view(s)
01-01-2013,
11:27 AM
Dark Photon
replied to a thread
Multisample textures
in
OpenGL coding: beginners
You don't need it to access multisample textures. You only need it if you plan to do per-sample rasterization. And while that is core in...
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19 replies | 904 view(s)
01-01-2013,
09:51 AM
Dark Photon
replied to a thread
deferred spotlight shadow map value issues
in
OpenGL coding: advanced
Ok, thanks. That helps. Again, first what I'm expecting to see. Then what confuses me. What I'm expecting to see is something like this: ...
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7 replies | 410 view(s)
01-01-2013,
09:10 AM
Dark Photon
replied to a thread
Linker problems to GLEW (can't be my graphic card, can it)
in
OpenGL coding: beginners
Yeah, such are the joys of Windoze's __declspec(dllexport) / __declspec(dllimport) annoyance. Tremendous source of code clutter. In Linux, by...
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8 replies | 231 view(s)
12-31-2012,
06:16 PM
Dark Photon
replied to a thread
deferred spotlight shadow map value issues
in
OpenGL coding: advanced
Will try, but what I see here is confusing -- I'll try to highlight what's causing me that confusion. First, a total side-issue, but why are you...
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7 replies | 410 view(s)
12-31-2012,
04:20 PM
Dark Photon
replied to a thread
help: problem getting OpenGL v4.30 context (or newer than OpenGL v2.10 context)
in
OpenGL coding: advanced
No worries. Happens to all of us now and then. :whistle:
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9 replies | 579 view(s)
12-31-2012,
04:18 PM
Dark Photon
replied to a thread
Linker problems to GLEW (can't be my graphic card, can it)
in
OpenGL coding: beginners
If it's a link error, it almost certainly doesn't have anything to do with your graphics card. Just websearch on your error message. These are...
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8 replies | 231 view(s)
12-31-2012,
04:10 PM
Dark Photon
replied to a thread
Ask for example of rendering to texture and then sample using shader
in
OpenGL coding: beginners
Well, beyond the fact that it's holiday break and probably fewer folks are reading the forums, I think it has a lot to do with that you don't seem to...
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7 replies | 318 view(s)
12-31-2012,
04:02 PM
Dark Photon
replied to a thread
How to remove alpha channel and keep full color
in
OpenGL coding: beginners
Yes. If you don't need full color, then "for uncompressed textures only", yes there's no reason to have RGB channels in your texture. Just have...
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1 replies | 71 view(s)
12-30-2012,
07:19 AM
Dark Photon
replied to a thread
help: problem getting OpenGL v4.30 context (or newer than OpenGL v2.10 context)
in
OpenGL coding: advanced
Glad you made some progress. Looks like calling glXCreateContextAttribsARB() was the ticket.
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9 replies | 579 view(s)
12-30-2012,
06:33 AM
Dark Photon
replied to a thread
Ask for example of rendering to texture and then sample using shader
in
OpenGL coding: beginners
What's the bug? You need to do the analysis and give us some details. What works -- what doesn't -- what have you discovered in trying to find the...
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7 replies | 318 view(s)
12-29-2012,
08:00 PM
Dark Photon
replied to a thread
help: problem getting OpenGL v4.30 context (or newer than OpenGL v2.10 context)
in
OpenGL coding: advanced
Just install Mesa-libGLU and Mesa-libGLU-devel packages. Then you'll have it. Alternatively, there's only one usage of a glu symbol in my entire...
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9 replies | 579 view(s)
12-29-2012,
07:46 PM
Dark Photon
replied to a thread
successive display of multiple items 3D with views
in
OpenGL coding: beginners
Why could you not do this? It's not clear what you're trying to accomplish, much less what problem(s) you had in doing it.
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4 replies | 250 view(s)
12-29-2012,
07:43 PM
Dark Photon
replied to a thread
Ask for example of rendering to texture and then sample using shader
in
OpenGL coding: beginners
Web-search for: glGenFramebuffer glBindFramebuffer glFramebufferTexture2D ... for the render-to-texture. For instance, here's a random hit...
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7 replies | 318 view(s)
12-29-2012,
08:18 AM
Dark Photon
replied to a thread
changing vertex location in vertex shader
in
OpenGL Shading Language
Sure looks like you're managing to change the distribution from a box to being distributed throughout a sphere. Don't know for sure, but a couple...
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1 replies | 147 view(s)
12-29-2012,
07:47 AM
Dark Photon
replied to a thread
help: problem getting OpenGL v4.30 context (or newer than OpenGL v2.10 context)
in
OpenGL coding: advanced
Please use ... or ... tags to mark code blocks, especially long ones. Keeps the indentation, uses pretty-printing, and doesn't take up so much...
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9 replies | 579 view(s)
12-29-2012,
07:42 AM
Dark Photon
replied to a thread
OpenGL first person camera orientation issues
in
OpenGL coding: beginners
It's just the 32-bit float version of sin(). Check your man pages or standard C library docs: double sin(double x); float...
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3 replies | 245 view(s)
12-29-2012,
07:37 AM
Dark Photon
replied to a thread
Arcball rotation around viewport-center
in
OpenGL coding: beginners
Your statement is a little ambiguous. For instance, center of the viewport is whatever you make it. I would encourage you to forget the...
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4 replies | 291 view(s)
12-27-2012,
06:49 PM
Dark Photon
replied to a thread
modern 3d graphics programming- impostor tutoria (tutorial 13) showing white screen
in
OpenGL coding: beginners
Do you mean Learning Modern 3D Graphics Programming?: * Learning Modern 3D Graphics Programming If so, Alfonse/Jason will I'm sure get back to...
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2 replies | 422 view(s)
12-27-2012,
06:41 PM
Dark Photon
replied to a thread
2D Bitmap Objects with Custom Lighting
in
OpenGL coding: beginners
It sounds like these rotated sprites all precomputed and basically static images. So just upload these to one or more textures on startup. If you...
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3 replies | 210 view(s)
12-27-2012,
06:37 PM
Dark Photon
replied to a thread
Simple projection matrix question
in
OpenGL coding: beginners
Sure thing.
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4 replies | 377 view(s)
12-27-2012,
06:36 PM
Dark Photon
replied to a thread
Utterly Confused: Amnesia The Dark Descent Help
in
User Hardware, Software, & Gaming Help
Look at which vendor's GPU you have (probably one of AMD, NVidia, or Intel). If this is Windows, look in the Device Manager in Control Panel for...
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1 replies | 249 view(s)
12-27-2012,
03:42 PM
Dark Photon
replied to a thread
help: problem with glGenVertexArrays()
in
OpenGL coding: advanced
Sounds like you don't have a valid context or something else is wrong before this call. First, you aren't checking for GL errors properly. ...
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2 replies | 351 view(s)
12-27-2012,
02:36 PM
Dark Photon
replied to a thread
Arcball rotation around viewport-center
in
OpenGL coding: beginners
Kinda looks like you need to separate the concepts of MODELING transform and VIEWING transform. MODELING transform positions objects in a shared...
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4 replies | 291 view(s)
12-27-2012,
12:22 PM
Dark Photon
replied to a thread
Multisample textures
in
OpenGL coding: beginners
Typically you would pass these into a shader via a sampler2DMS and sample them via texelFetch(). Web search those and you'll come up with some good...
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19 replies | 904 view(s)
12-27-2012,
11:35 AM
Dark Photon
replied to a thread
Simple convolution question
in
OpenGL coding: advanced
Please don't jump his case. Jump mine. link He didn't post these threads at the same time. He followed-up to the Advanced only after not getting...
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4 replies | 359 view(s)
12-25-2012,
03:04 PM
Dark Photon
replied to a thread
Is the Z axis positive or negative "into the screen"?
in
OpenGL coding: beginners
EYE-SPACE -Z is into the screen. glFrustum/gluPerspective takes positive values for near and far, which equate to Z=-near and Z=-far (in EYE-SPACE).
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1 replies | 187 view(s)
12-22-2012,
08:50 PM
Dark Photon
replied to a thread
Simple projection matrix question
in
OpenGL coding: beginners
See the perspective matrix in the back of the Red Book, or those listed here: * http://www.songho.ca/opengl/gl_transform.html *...
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4 replies | 377 view(s)
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Der Schwartz
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Commander of the Imperious Forces
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