Fw: [Dev-C++] marching cubes (3D)

[michele <mic...@li...>]

hi Jan,
if you are interested...
What I have to do is to render a 3D volume from sampled points (certain =
conditions define that volume)...

So what I do is to divide the 3D space in a 3D grid and to test each =
point of this grid to know if it is inside or outside my suface...
Regards=20
(if you have some suggestions let me know!  thanks)



----- Original Message -----=20
  From: Jan Ringos=20
  To: michele=20
  Sent: Friday, April 09, 2004 6:44 PM
  Subject: Re: [Dev-C++] marching cubes (3D)


  Very interesting. But honestly I see no use for it. In game I would =
instead use something like height-map or model with clipping definitons.
  But I don't know what specific are you want to do with it. Anyway It =
shouldn't be too difficult to implement exact use.

  ---
  Jan Ringos, Tr...@mx...
  http://Tringi.Mx-3.cz

    ----- Original Message -----=20
    From: michele=20
    To: Jan Ringos ; DEV-C++=20
    Sent: Friday, April 09, 2004 10:18 AM
    Subject: Re: [Dev-C++] marching cubes (3D)


    Hi...
    =20
    "The marching cubes algorithm is used in volume rendering to =
construct an isosurface from a 3D field of values.
    The 2D analog would be to take an image, and for each pixel, set it =
to black if the value is below some threshold, and set it to white if =
it's above the threshold. Then smooth the jagged black outlines by =
skinning them with lines..." [James Sharman]

    if you (and someone else) want to read some interesting articles =
about marching cubes:
    Introduction:
    http://www.exaflop.org/docs/marchcubes/ind.html
    =20
    Article with some c code:=20
    =
http://www.cfxweb.net/modules.php?name=3DNews&file=3Darticle&sid=3D199
    (more available at http://matrix.netsoc.tcd.ie/~nash/metaballs/src/ =
gently by Nicholas: nn...@st...)