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Type: Posts; User: David

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  1. Thread: Graphic Card

    by David
    Replies
    18
    Views
    1,252

    Re: Graphic Card

    My opinion is this, if you are JUST programming buy a nice cheap Riva TNT or TNT2 which you should be able to get second hand or very cheap, but inevitably you will be playing games so in that case...
  2. Thread: zooming

    by David
    Replies
    4
    Views
    168

    zooming

    gluPerspective(m_FOV*m_fZoom, m_AspectRatio, m_NearClipPlane, m_FarClipPlane);

    m_fZoom is a zoom factor (1.0 = normal) and changing it increases / decreases my zoom.
    This is fine but I need to...
  3. Replies
    5
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    700

    Re: Film Grain in OpenGL

    Although this is pretty much a repetition of what has been said above but...

    We created an XRay renderer and to simulate the noise we created a noise texture using 3ds max then blended at the last...
  4. Re: NVIDIA GeForce 2 graphics corruption using OpenGL

    By the way, when I said 'upgrade the bios' i meant on the GeForce...
  5. Re: NVIDIA GeForce 2 graphics corruption using OpenGL

    This is a bit of a wild stab in the dark but we have solved various problems on a Geforce2 but doing the following:

    Upgrading the Bios (this fixed a BIG problem for us)

    Checking whether your...
  6. Replies
    6
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    176

    Re: fog on wildcat 4210

    Yes, we tried GlHint but that had no effect,
    its a bit odd that the Wildcat costs about 5000 dollars and the Geforce2 about 350 dollars and we are continually finding more and more reasons to use...
  7. Replies
    6
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    176

    Re: fog on wildcat 4210

    Thats pretty much the reasoning that we came to, unfortunatly the Wildcat technical support is very minimal.

    Thanks!
  8. Replies
    6
    Views
    176

    fog on wildcat 4210

    Im getting fog problems on a Wildcat 4210, meshes that have a lot of small polygons do not fog to the same intensity as that of larger polygons, I orignally thought it was a code problem but I do...
  9. Replies
    4
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    342

    wrl or 3ds to opengl code

    call me lazy if you want but is there a library or something which converts a 3ds or vrml (wrl) file to opengl code?

    Or does someone know of a text parser which reads in vertex and face...
  10. Replies
    3
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    202

    vectors and rotations

    Hello all,

    Imagine I have a car pointing in a direction (in 3 space), and I have a vector that I want to point the car to (so the car is pointing in the direction of the vector). How do I do...
  11. Replies
    0
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    120

    Splines and orientation

    Can anyone help or point me to a good site...

    I have a 3d Spline line from which I wish to animate an object (for example an aeroplane), problem is as I traverse along the spline how do i rotate...
  12. Replies
    1
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    161

    Nurbs and control points

    Hello,

    This is my problem: I have a set of vertices which are basically waypoints, similar to waypoints in a flight sim or space game. Instead of drawing a line between each pair I want a nice...
  13. Replies
    6
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    261

    Re: Saving screen to bitmap

    Ive done it at last! Thanks for the replies they certainly helped me find out my problem. I had some dodgy code when I was reading in the pixels, but looking at yours, I realised that I could read...
  14. Replies
    3
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    190

    Re: Vector Angles - Math - Help Please :)

    I 'think' this might be the answer,

    to get the three angles, using your vector apply the dot product three times, once against the X axis, Once against the Y and once against the Z axis. This...
  15. Replies
    6
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    261

    Re: Saving screen to bitmap

    I use glreadpixels

    I am using a 24 bit format, and I think it is to do with the way I am formatting my data (currently I am simply packing 3bytes (RGB) one after the other, is this right?

    (I...
  16. Replies
    6
    Views
    261

    Saving screen to bitmap

    Hi, I need to save the screen to a bitmap,
    Ive found the bitmap format out, but my program just doesnt work, does anyone know of any source code (in OpenGL) which does this?


    Thanks
  17. Re: glRotatef() - A newbie question... please help

    Try this,

    Drawscene()
    {
    glRotatef(theta,0,1,0);
    glPushMatrix();
    glTranslatef(-1*myposx,-1*myposy,-1*mypoz);

    drawWorld(); //draws the world
    glPopMatrix();
  18. Replies
    2
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    550

    Re: How to make a 3rd person camera

    This advice is off the top of my head (literally, I found it written there...) so if it is wrong then shoot someone... ;-)

    When you rotate the person you need to get the reverse of the viewing...
  19. Replies
    2
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    110

    Re: how to use indexed color in OpenGL?

    The 'red book' describes how to use color index mode.

    A word of warning though, not many graphics cards support it anymore...

    David
  20. Replies
    3
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    162

    Re: How do collision engines work?

    Collision detection is a real 'bang your head against' the wall subject. There seems to be no easy solution unless you use bounding boxes which arent very accurate. It really depends what you want...
  21. Replies
    8
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    424

    Re: dot & cross products

    Judge,

    It is not as complicated as you think...

    Simply put, the dot product is used to find the cosine of an angle between two vectors.
    (ie apply inverse cos to the result gives you the angle...
  22. Replies
    12
    Views
    407

    Re: What am I doing wrong here?

    I think John is right but if you arent using ms vc++ you need to find out how to link libraries. (the ones john mentioned).

    Also make sure that you have glut.h gl.h and glu32.h (I think they are...
  23. Thread: Voxels

    by David
    Replies
    1
    Views
    139

    Voxels

    Does anyone know where I can find a library or some code which converts a mesh model of some format such as 3DS max to a voxel model?

    Grateful if you could help
  24. Thread: octrees

    by David
    Replies
    2
    Views
    155

    octrees

    Hi,
    Im doing some research into octrees as I wish to simulate material removal of an object using a drill (basically, drilling holes into a 3d object). I guess that the way to do this would using...
  25. Replies
    3
    Views
    262

    Starting under Linux

    Hello,

    Ive been programming in OpenGl under MSwindows for the last year or so and have decided it is time I learnt some 'unix' skills. I am thinking of getting a copy of Suze Linux (or could you...
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