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  1. help: copy default depthbuffer to texture; test in vertex shader

    My application needs to do the following:

    1: Render the entire environment and objects to the default framebuffer and depthbuffer per usual practice.

    2: Draw 1+ million point vertices in...
  2. help: cannot link cairo into my 3D engine any more

    I've been developing a 3D engine for a while, and it was working (on both linux and windoze) when my winxp64 drive stopped booting. I bought a new disk drive, installed 64-bit win7 and vs2010, and...
  3. ##### SOLVED ##### Ah, just shoot me! I...

    ##### SOLVED #####

    Ah, just shoot me! I hate when this kind of nonsense happens. Maybe/Probably my fault.

    In my IDE, I had directory "/usr/lib" specified as a linker search path... probably...
  4. Nope, something else, because calling...

    Nope, something else, because calling glXCreateContextAttribsARB() immediately terminated my application (no return from the function, no error message, just terminal window vanishes and application...
  5. An update. I decided to take your approach and...

    An update. I decided to take your approach and create a fairly stripped down version of my ig_graphics_initialize() and ig_window_create() functions. I don't know why, but after the initialization...
  6. Actually, I already did all that (except install...

    Actually, I already did all that (except install GLU). The problem is, when I remove the GLU, I get boatloads of unrecognized OpenGL symbols (because your program doesn't involve GLEW, I assume).
  7. Thanks for the comments and code, and for fixing...

    Thanks for the comments and code, and for fixing up my code.

    Yes, I do have a lot of debug code to query various values and sometimes print them out. That was to help me find problems in the code...
  8. help: problem getting OpenGL v4.30 context (or newer than OpenGL v2.10 context)

    NOTE: This is a continuation of a thread about problems with the glGenVertexArray() function, but apparently the problem is that my program is not getting a recent OpenGL context since I upgrated my...
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    I'm almost certain you are correct (the problem...

    I'm almost certain you are correct (the problem is getting OpenGL v4.30 context, not default OpenGL v2.10 context). Therefore, to keep forum messages consistent with their titles, I will start a new...
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    help: problem with glGenVertexArrays()

    I just installed a new video card (GTX 680) in my computer (64-bit ubuntu linux v12.04) and installed the latest nvidia driver (v310.19) and updated my GLEW files to v190. I updated my GL and GLX...
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    Wait, I read the messages in this thread and...

    Wait, I read the messages in this thread and something didn't seem right. Finally I think I understand what you're talking about. You are talking about a CPU program writing procedural textures,...
  12. Thanks for the idea. But yes, the -m32 and -m64...

    Thanks for the idea. But yes, the -m32 and -m64 settings to compiler and linker have always been in the 32-bit and 64-bit properties of this program.
  13. An update. I was told to NOT install the...

    An update. I was told to NOT install the ia32-libs package, because "multiarch" and "multilib" now takes care of everything. Ehhhhh... not everything. After I installed the ia32-libs package and...
  14. help: build 32-bit OpenGL apps on 64-bit ubuntu 12.04

    I just replaced my 64-bit ubuntu 10.04 LTS system of the past 2 years with a new fresh-install 64-bit ubuntu 12.04 LTS system. Actually it's just a new disk drive on the same computer, but that...
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    Re: Curious to who is sticking with OpenGL now...

    Yeah, that's what I was trying to point at. About 2.5 years ago it looked like OpenGL was headed over a cliff. And a LOT of OpenGL programmers said "see ya" at that time, and there was some degree...
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    Re: Curious to who is sticking with OpenGL now...

    Wow! Obviously D3D fans are amazingly insecure! No OpenGL fans said a thing, yet D3D fans (who have no reason whatsoever to even bother with this forum) immediately jump on this thread.

    Wow! ...
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    Re: Curious to who is sticking with OpenGL now...

    Wow!!! Very interesting to look back on this thread after 2 years or so! Hahaha.

    As it turns out, 2.5 years later, OpenGL is kicking butt! Well, let's just say "holding its own" to avoid D3D...
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    Re: Texture Switching

    The 4-bit field is a vertex attribute, yes (Though how you create a 4-bit attribute is beyond me)? It's effectively part of the texture coordinate. So you simply do what you do if the same position...
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    RE: How to code in C++ using OpenGL in Linux

    I suggest you study the NeHe tutorials (search the internet). This is mostly to expose you to "what needs to be done".

    I also suggest you buy the latest version of the OpenGL SuperBible... which...
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    Re: help: solve GLEW failure with GLX

    Yeah, and I didn't get the "invalid colormap" error, which might have saved me some time if I had.

    Of course the contents of the xcolormap assigned to that other structure will be different on our...
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    Re: help: solve GLEW failure with GLX

    Ha!!! I should have taken your comments more seriously!

    I switched around the code so xcolormap was created before being assigned to xsetwindowattributes.colormap (before XCreateWindow() is...
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    Re: help: solve GLEW failure with GLX

    Thanks much for that link. The process it described worked perfectly, and installed the latest v260.29.19 driver.
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    Re: help: solve GLEW failure with GLX

    I had the same problem with GLEW v155 before I tried GLEW v157, which is the one in the ZIP file. If you have a version of GLEW before v155, could you try again with the GLEW files in the ZIP file I...
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    Re: help: solve GLEW failure with GLX

    Well, that's fine, but I guess you didn't notice that calling the function glXCreateContext() terminates the application!

    Obviously the context must be created before it is "made current", so...
  25. Re: Intel's new graphics chips - OpenGL 3.0 support

    No kidding!

    Which is why CPU-based GPUs and dedicated GPUs will both continue as separate markets for a long, long time.

    What might happen is, the high-end of the GPU market becomes the...
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