Part of the Khronos Group
OpenGL.org

The Industry's Foundation for High Performance Graphics

from games to virtual reality, mobile phones to supercomputers

Search:

Type: Posts; User: Y-tension

Page 1 of 8 1 2 3 4

Search: Search took 0.01 seconds.

  1. Replies
    3
    Views
    737

    Re: shadow question

    There are standard techniques for this kind of stuff. Look into shadow mapping and stencil shadows.
  2. Replies
    0
    Views
    779

    TexFetch and texture coordinates

    Hi, I have been trying to get texFetch working in GLSL and there are some artifacts stemming from the fact that it clamps texture coordinates to the image boundaries. Is there some relatively clean...
  3. Replies
    1
    Views
    1,039

    Re: Cannot Update OpenGL Past 1.1

    Do you use a hybrid system? If you do make sure to enable the NVIDIA card for all applications from the NVIDIA control panel.
  4. Replies
    4
    Views
    1,540

    Re: Problem with stencilling

    Try glClearStencil(0) before glClear(GL_STENCIL_BUFFER_BIT).
  5. Re: texture to texture copy, running through a shader?

    Hi zassGL, set projection and modelview matrix to identity, viewport must match the dimensions of your second (write-to) texture. Then just render a full screen quad (1, 1),(-1, 1),(-1, -1),(1, -1) -...
  6. Replies
    91
    Views
    126,198

    Re: Official feedback on OpenGL 4.0 thread

    Had to stop by to say congrats for the new release. The new features are absolutely fabulous!
  7. Replies
    5
    Views
    1,921

    Re: Framebuffer object initialization

    Yes, that's the idea with WGL_ARB_render_texture. WGL_ARB_render_texture uses a pbuffer context bound to a texture(read the specs but I warn you, it's complicated). So all state is context specific...
  8. Replies
    5
    Views
    1,921

    Re: Framebuffer object initialization

    Yep! Use the old WGL_ARB_render_texture extensions. But be warned: they are too clumsy.
  9. Replies
    4
    Views
    2,704

    Re: VBO Buffering

    What platform is this? Java? What video card?
    I know for sure that calling glBufferData with NULL and then glBufferSubData is more expensive than simply calling glBufferData. Actally, in contrast to...
  10. Replies
    9
    Views
    7,126

    Re: Beginner Book Recommendations

    Yes HD 4800 supports up to 3.3 if I'm not mistaken.

    There is an openGL 3.1 edition of the 'OpenGL programming guide'(used to be the best book around for beginners)
    but it covers a lot of...
  11. Replies
    2
    Views
    967

    Re: Need some help with waves

    You have made moving waves which means each point at x has a y value of sin(x - ft) (Actually this wave moves to the right) where f; is the frequency of the wave, k is the wave number. To produce...
  12. Replies
    1
    Views
    886

    Re: Drwaing a circle

    http://en.wikipedia.org/wiki/Midpoint_circle_algorithm

    And don't forget: Google is your friend(for now)!
  13. Re: Surface normals, really need help! :( Video shows!

    Because the UxV = -VxU and the cross product depends on the orientation of U and V (counterclockwise for "positive" normal, well I hope you know the maths to understand what I mean).
    What is missing...
  14. Replies
    3
    Views
    1,113

    Re: Advanced Rotating

    I don't understand the problem space very well...The beam is the rotating object? is the beam attached solidly on the surface? What is attached on the other side of the spring?
    A picture could speak...
  15. Replies
    2
    Views
    1,115

    Re: GLSL and npot textures

    Hey there!
    Non power of two textures use sampler2D always, they just have non-power-of-two dimensions. Their coordinates are normalized to {0,1}.
    Texture rectangles on the other hand are another...
  16. Replies
    9
    Views
    1,618

    Re: Pixelbuffers and what exactly is going on

    As far as I know, glBufferData allocates the memory on the GPU, then glMapBuffer copies the data to system memory and gives you a pointer to the copied data if reading only. If writing only, it...
  17. Replies
    9
    Views
    2,669

    Re: Alpha Buffer / Alpha Bits

    Wow, just a minute there! I don't know if i got this right...Actually, there's 256(0 included) values in an 8bit per component buffer, so in fact the largest possible value that can be represented...
  18. Replies
    1
    Views
    1,105

    Correct initialization on GLX?

    Hey people, started porting some of my openGL demos to linux (Ubuntu 9.10) but I've got a couple of compatibility issues.
    On a geforce 8400,I use GLX_BUFFER_SIZE 24 for fbconfig but on an older ATI...
  19. Replies
    4
    Views
    3,180

    Re: Skeletal Animation

    Thanks! :)
    My personal opinion is that learning openGL well, will, in itself, teach you a lot on how graphics work in general. A good, but rapidly becoming outdated, resource is the red book(OpenGL...
  20. Replies
    9
    Views
    2,669

    Re: Alpha Buffer / Alpha Bits

    Not 16 bits per pixel, but bits per component. Anyway, accumulation buffers are slow, outdated, and you can do the same thing with framebuffer objects plus system independently. Plus you can ask for...
  21. Replies
    4
    Views
    3,180

    Re: Skeletal Animation

    Hey, another Blender user there! There is a way actually, but skeletal animation is too complex, you need to write your own animation algorithms, most probably using quaternions and do some skinning...
  22. Replies
    9
    Views
    2,669

    Re: Alpha Buffer / Alpha Bits

    Try floating point color buffers maybe? That's the obvious solution. These are platform dependent solutions because you have to explicitly ask for a float color buffer through...
  23. Replies
    7
    Views
    2,296

    Re: Environment Cube Mapping

    Ah! I realized why you render the quads! It's a skybox...duh! However I think the texture coordinates you use for it are wrong because cube mapping does not use the same kind of coordinates as normal...
  24. Replies
    8
    Views
    3,280

    Re: ,exe file does not work on other computer

    I told you before, just copy glu32.dll into the folder where your executable is compiled.
    Another thing is that I can't see opelgl32 and glu32 in your linker options. Otherwise it looks more or less...
  25. Replies
    8
    Views
    3,280

    Re: ,exe file does not work on other computer

    No,no...I use code blocks too. The only problem that may pop up with MinGW (Supposing you use that as a build system) in general is that sometimes, there is a c runtime library needed that may not be...
Results 1 to 25 of 181
Page 1 of 8 1 2 3 4