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Type: Posts; User: zedrummer

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    Simple (not for me) rotation question

    Hello

    If I want to rotate a mesh around a point (x,y,z) and the axis of the rotation is oriented by the vertex (vx,vy,vz), how can I get the matrix of this rotation, please? I use GLM in cas there...
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    Ok so here are the results I got from internet...

    Ok so here are the results I got from internet and from my own experience:

    1/ If you are going to map different buffers, it's better to glMapBuffer all of them at once, then sending/receiving...
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    Mapping buffers optimisations

    Hello

    1/ Is there any speed improvement in using glMapBufferRange rather than
    glMapBuffer, considering that the transferred datas will be the same after?

    2/ Let's say that I have a 2048x2048...
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    It works with GL_POINTS, thanks again!

    It works with GL_POINTS, thanks again!
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    Good, I'll try! Thanks a lot

    Good, I'll try!
    Thanks a lot
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    Ok I'm gonna try, thanks a lot! At least you...

    Ok I'm gonna try, thanks a lot!
    At least you validate what I said about gl_Position, that was my main interest.
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    GLSL simple question

    Hello

    If I understand well, in the vertex shader, the gl_Position built-in variable should get a clip-space value, that means a value between [-1,-1,-1,1] and [1,1,1,1].

    So if my vertex shader...
  8. Thread: GPU memory

    by zedrummer
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    Ok thank you all, that is clear. I'm gonna google...

    Ok thank you all, that is clear. I'm gonna google about adapting content with computer specs.
    Cathy L.
  9. Thread: GPU memory

    by zedrummer
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    Ok that is what I wanted to know: so for the...

    Ok that is what I wanted to know: so for the moment not all the drivers will switch to main memory with gl(xxxxx)buffer calls if not enough dedicated graphics memory is available. So every program...
  10. Thread: GPU memory

    by zedrummer
    Replies
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    945

    GPU memory

    Hello
    If I try to get GPU memory for VBO, do I need to consider the case when the GPU is out of memory or glGetBuffers/glBindBuffer/glBufferData may use main memory if the GPU is OOM, so this is...
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    Hello Thanks for your answer. I'm switching old...

    Hello
    Thanks for your answer.
    I'm switching old OpenGL 1 code to 3.3 and I didn't know that GL_LUMINANCE/8 was deprecated. Thanks to you, I discovered that. Now googling around, I found that the...
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    Oops that's not the right place for this post,...

    Oops that's not the right place for this post, sorry for that, could anybody move it? Thanks ans sorry again :-[
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    3D texture and GL_LUMINANCE8

    Hello

    With the code:


    glTexImage3D(GL_TEXTURE_2D_ARRAY_EXT,0,GL_LUMINANCE8,512,512,2,0,GL_LUMINANCE,GL_UNSIGNED_BYTE,tex2Darray);

    (tex2Darray pointing to a GLubyte array of the right...
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