hi all -

i'm new here.  i have a quick question.  does anyone have any info on a way
to render a pov-ray scene using line art?  i'd like to draw my scene's with
hidden surface removal using only line art, no shading or filling.  another
bonus would be to show hidden lines (edges) as dotted or dashed, but that's
not absolutely necessary.  we'll start simple and work towards the whole
package.

any help would be greatly appreciated.

thanks

tom

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Step 1: start with a piece of paper and pencil...;)

-- 
Tim Cook
http://empyrean.scifi-fantasy.com
mirror: http://personal.lig.bellsouth.net/lig/z/9/z993126

-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GFA dpu- s: a?-- C++(++++) U P? L E--- W++(+++)>$
N++ o? K- w(+) O? M-(--) V? PS+(+++) PE(--) Y(--)
PGP-(--) t* 5++>+++++ X+ R* tv+ b++(+++) DI
D++(---) G(++) e*>++ h+ !r--- !y--
------END GEEK CODE BLOCK------

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In article <3cf8843f@news.povray.org> , <htb### [at] sbcglobalnet@sbcglobal.net> 
wrote:

> does anyone have any info on a way
> to render a pov-ray scene using line art?  i'd like to draw my scene's with
> hidden surface removal using only line art, no shading or filling.

POV-Ray is a ray-tracer.  It does not compose object out of triangles (other
than triangle/mesh objects of course).  This is explained very well at
<http://www.students.tut.fi/~warp/povQandT/languageQandT.html#wireframes>

There are a few include files and I suppose tutorials that explain how to do
comic like output (at least i recall seeing that somewhere).  Maybe that could
help you.  I would suggest to search for images in povray.binaries.images or
for tutorials in the POV-Ray linkscollection at <http://www.povray.org/links/>


    Thorsten

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On Sat, 01 Jun 2002 04:25:04 -0500, htb wrote:

> i'm new here.  i have a quick question.  does anyone have any info on a
> way to render a pov-ray scene using line art?  i'd like to draw my
> scene's with hidden surface removal using only line art, no shading or
> filling.  another bonus would be to show hidden lines (edges) as dotted
> or dashed, but that's not absolutely necessary.  we'll start simple and
> work towards the whole package.

It sounds like you don't understand how POV-Ray works. POV-Ray is a
raytracer, so things like hidden surface removal, filling, and "lines"
don't apply. POV doesn't draw lines on the screen and then fill them in,
it follows paths of light through the scene, intersecting rays with
mathematical shapes.

However, MegaPOV has a patch that implements post-processing image
filters, and one of these is a "find_edges" filter that uses changes in
surface distance, normal, and color to detect edges. This can be used
with the posterize filter to produce a cartoon rendering effect, which
might be close to what you want. I think H.E. Day did a tutorial on
this...


-- 
Christopher James Huff <chr### [at] maccom>
POV-Ray TAG e-mail: <chr### [at] tagpovrayorg>
WWW: http://homepage.mac.com/chrishuff/

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