>I have gotten started on a new transparence patch, the syntax might
>eventually be like this:
>finish {
>    transparence {
>        transparence_blur AMOUNT
>        blur_samples SAMPLES
>        filter_pigment {PIGMENT}
>        transmit_pigment {PIGMENT}
>    }
>}


This just got me thinking (actually the idea has been floating around in my
head for a while), the way reflection has been growing, wouldn't it be nice
if instead of

finish
{
 reflection_type
 reflection_min
 reflection_max
 reflect_metallic
 etc.
}

we could have

finish
{
 reflection
{
 val / min, max
 type
 metallic
 etc.
}
}

wouldn't it be shorter and less bothersome than reflection_x? I think that
the number of reflection parameters have gotten to a point where this would
be a good idea.

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Eric Freeman wrote:
> 
> Hey all,
> 
> I'm working on a lamp that I saw in a waiting room the other day.  The
> problem is the lamp shade.  It should be opaque in that you can't see thru
> it but transparent in that it lets light out.  Is such a thing possible?  Is
> this a job for media???  I'm clueless.
> 
> Eric

I would use those patches in povray that are translucent, like the
bicubic patch. 

Here's a example code. Have a look at the texture statement. It's only
rgb ... not rgbt.

camera {location <0,5,0>
        look_at  0}

light_source {y*0.5 rgb 4}

bicubic_patch{
  type 0
  flatness 0.001
  u_steps 4
  v_steps 4
  <0,0,0>,<1,1,0>,<2,1,0>,<3,0,0>,
  <0,1,1>,<1,1,1>,<2,1,1>,<3,1,1>,
  <0,1,2>,<1,1,2>,<2,1,2>,<3,1,2>,
  <0,0,3>,<1,1,3>,<2,1,3>,<3,0,3>
  texture{pigment{rgb<1.0,1.0,0.8>}
          finish {ambient 0
                  diffuse 0.4
                  reflection 0}
         }
  translate <-1.5,0,-1.5>        
}


Hope this one helps.

-- 
Marc Schimmler

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Attachments:
Download 'bezier.jpg' (6 KB)

Preview of image 'bezier.jpg'

In article <388d1251@news.povray.org>, "TonyB" 
<ben### [at] panamaphoenixnet> wrote:

> This just got me thinking (actually the idea has been floating around in 
> my
> head for a while), the way reflection has been growing, wouldn't it be 
> nice if instead of
> 
> finish
> {
>  reflection_type
>  reflection_min
>  reflection_max
>  reflect_metallic
>  etc.
> }
> 
> we could have
> 
> finish
> {
>  reflection
> {
>  val / min, max
>  type
>  metallic
>  etc.
> }
> }
> 
> wouldn't it be shorter and less bothersome than reflection_x? I think 
> that
> the number of reflection parameters have gotten to a point where this 
> would be a good idea.

I have done something similar to this in my reflectivity patch, which 
mostly just gave a new syntax to blurred/angle-dependant reflections. 
The syntax for this patch is pretty strange,though. Several things are 
controlled by patterns instead of float values.
But it wouldn't be difficult at all to simply add an alternate syntax. I 
don't really care for the current one...

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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You could try adding no_shadow to the shade, then give the shade some amient
value to make it look like it's glowing from the inside, but that won't make a
defined shadow against the wall, so make a slightly smaller version that is grey
with high transmit value (but not 1) to create the shadow effect.

Just a guess at a workaround

Eric Freeman wrote:

> Hey all,
>
> I'm working on a lamp that I saw in a waiting room the other day.  The
> problem is the lamp shade.  It should be opaque in that you can't see thru
> it but transparent in that it lets light out.  Is such a thing possible?  Is
> this a job for media???  I'm clueless.
>
> Eric
> ---------------
> "A wise and frugal government, which shall restrain men from injuring one
> another, which shall leave them otherwise free to regulate their own
> pursuits of industry and improvement, and shall not take from the mouth of
> labor the bread it has earned.  This is the sum of good government."
>      - Thomas Jefferson
>      - First inaugural address, 1801
> ---------------
> http://www.ametro.net/~ericfree
>
>  [Image]

--
Josh English
eng### [at] spiritonecom
"May your hopes, dreams, and plans not be destroyed by a few zeros."

Post a reply to this message

> You could try adding no_shadow to the shade, then give the shade some amient
> value to make it look like it's glowing from the inside, but that won't make a
> defined shadow against the wall, so make a slightly smaller version that is grey
> with high transmit value (but not 1) to create the shadow effect.

Maybe keep the shadow but give it a texture with high ambience and use a gradient y
to make it brighter (more ambient) where it's closer to the bulb.

--
Homepage: http://www.faricy.net/~davidf/
___     ______________________________
 | \     |_       <dav### [at] faricynet>
 |_/avid |ontaine      <ICQ 55354965>

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I sure appreciate everybody's input.  I'm going to try all of your
suggestions and see which one (or maybe something else) works.

Eric
---------------
"A wise and frugal government, which shall restrain men from injuring one
another, which shall leave them otherwise free to regulate their own
pursuits of industry and improvement, and shall not take from the mouth of
labor the bread it has earned.  This is the sum of good government."
     - Thomas Jefferson
     - First inaugural address, 1801
---------------
http://www.ametro.net/~ericfree

Post a reply to this message