That head mesh is great. Only other one I've seen was on TV. I'd wager it
was the crowd at SIGGRAPH that caused the nose to be off center. Somebody
probably nudged the tripod (if the laser range finders were tripod
mounted). heh-heh
From what I could make out of that tri-color macro I thought perhaps a
whole texture (including image_map?) might be done the same way. I'm not
much a user of meshes though.
In case you hadn't heard or seen it, there's a thing called Photo Modellor
that applies images to meshes you create by plotting out the points onto
several views of the pictured object (front, side, top, etc.). Only tough
part is the manual mesh making and I didn't have any success learning to
get the surfaces defined enough. Seems potentially a great thing, free
trial version available. Mike Hough told several of us about it at AOL,
it's at:

 http://www.eossystems.com/Lite/


Bob Crispen wrote:
> 
> Bob Hughes wrote:
> 
> > Have you looked at the tri-color macro for triangles yet? You may have and
> > I'm leading you to old stuff. Anyway, it's at:
> >
> > http://www.geocities.com/SiliconValley/Lakes/1434/otherincludes.html
> >
> > No idea if this is the same kind of thing you are looking for or not, but
> > it does apply a pigment to points on the triangles.
> 
> Many thanks, Bob.  That's a feature request I didn't mention, but
> which has a very high coolness-per-byte payoff: per-vertex coloring.
> I'm off to try it now.
> 
> What I had in mind was mapping 2D coordinates of a texture image to
> points on a mesh.  The way it's done in VRML is explained at
> http://home.hiwaay.net/~crispen/vrmlworks/tutorials/texture.html
> There's a fairly spectacular example of texture coordinates at
> http://home.hiwaay.net/~crispen/worlds/avatar/bobhead.wrl -- a
> friend of mine did this for me last summer at SIGGRAPH.  It's three
> photos overlaid on three laser rangefinder scans of my head.
> 
> They messed up on my nose -- it doesn't point west quite so much
> as it does in one of those meshes, but thanks to texture coordinates,
> when I move the points of my nose over, the texture will move with
> the points.
> 
> Granted that file formats where meshes are central and you have
> point sets and indices (Inventor, VRML, lots of others) make the
> texture coordinate mapping pretty compact, but compactness doesn't
> matter so much in POV.  There's no reason why it couldn't be
> applied to the POV notation just like Chris's tri-colour macro.
> Instead of rgb value, just specify the texture image for the
> triangle and the coordinates within the image for each point.
> +-------------------------------+--------------------------------------+
> | Rev. Bob "Bob" Crispen        |            "IT FOUND ME!"            |
> | cri### [at] hiwaaynet            |      Campus Crusade for Cthulhu      |
> +-------------------------------+--------------------------------------+

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/homepage.htm
 mailto://inversez@aol.com?Subject=PoV-News

Post a reply to this message