A long time ago I asked this question, and received an excellent answer, yet
I've long since forgotten what was said(and the post unretrievable).  My
question concerns the basics of image mapping a "decal" on an object.  The
basics of what I remember involve giving the object an ambient texture and
then using an orthographic camera to render an image later to be used as a
template in a paint program.  What I do not remember are the
scaling/translation rules, based on the settings of the camera, used to
place the image map.

Guidance much appreciated,
--
-Chris-

ICQ 85873475

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Your original post, from April 3rd of this year, is still on the news server.
Is this what you were looking for?

Subject:
            Re: Image Map Tutorial?
       Date:
            Thu, 6 Apr 2000 22:20:49 -0700
       From:
            "Chris Spencer" <chr### [at] bluelectrodecom>
 Newsgroups:
            povray.general
  References:
            1 , 2 , 3 , 4 , 5 , 6




> Oh wow, confusing me  :-)
> Anyway, all you're really needing is to center the image first then scale
it to
> the size you have set in the camera.  Since the image starts off as 1 unit
> square with lower left corner at <0,0,0> then you want to do 'translate
> <-0.5,-0.5,0>'  and then  'scale <25,25,1>' and finally 'rotate 90*x' for
the
> camera to see it.
> That should be it I think.   That plane {z,-10 is not going to show up
though.
> The camera will be looking parallel along it and therefore see nothing of
it.

That worked out fine.  The checkered plane was there for a later 3D view,
when the ortho camera was commented out.

I tried mapping the image as a spherical type, but it became incredibly
distorted.  Planar seemed the best option and didn't distort much.

Thanks again,

-Chris-

> If I'm understanding this right then you are trying to get a spherical
image
> which is actually mapped on as planar to be seen orthographically which
then no
> longer has any spherical quality.  Which is why I got confused.  Anyone
else?

Kevin Jackson-Mead
http://www.mindspring.com/~jacksonmead

"Chris S." wrote:

> A long time ago I asked this question, and received an excellent answer, yet
> I've long since forgotten what was said(and the post unretrievable).  My
> question concerns the basics of image mapping a "decal" on an object.  The
> basics of what I remember involve giving the object an ambient texture and
> then using an orthographic camera to render an image later to be used as a
> template in a paint program.  What I do not remember are the
> scaling/translation rules, based on the settings of the camera, used to
> place the image map.
>
> Guidance much appreciated,
> --
> -Chris-
>
> ICQ 85873475

Post a reply to this message

Ah...and so it is:)  Didn't know the records went back so far...  Thanks for
the redirection.

-Chris-

Kevin Jackson-Mead <jac### [at] mindspringcom> wrote in message
news:39A5D00B.4FE221A3@mindspring.com...
> Your original post, from April 3rd of this year, is still on the news
server.
> Is this what you were looking for?
>
> Subject:
>             Re: Image Map Tutorial?
>        Date:
>             Thu, 6 Apr 2000 22:20:49 -0700
>        From:
>             "Chris Spencer" <chr### [at] bluelectrodecom>
>  Newsgroups:
>             povray.general
>   References:
>             1 , 2 , 3 , 4 , 5 , 6

Post a reply to this message