Jellby <jel### [at] M-yahoocom> wrote:
> Among other things, dan B hentschel wrote:
>
>
> > I like the photon effects in the right side image, but I don't like the
> > shadowy interior of the block. Again, any suggestions would be
> > appreciated.
>
> Not that I have any useful idea, but are the plastic walls solid? Do they
> have outer surface, inner surface and an interior or are they just the
> outer surface of a clipped/hollow box?
>
> --
> light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
> 9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
> 0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby

They are completely CSG objects. Here is the code:


#declare clear_round_corner_box =
intersection {
    merge {
        // Front left corner
        cylinder {
          <-box_size + corner_width, -2*box_size, -box_size + corner_width>
          <-box_size + corner_width, 2*box_size, -box_size + corner_width>
          corner_width
        }
        // Front right corner
        cylinder {
          <box_size - corner_width, -2*box_size, -box_size + corner_width>
          <box_size - corner_width, 2*box_size, -box_size + corner_width>
          corner_width
        }
        // Back left corner
        cylinder {
          <-box_size + corner_width, -2*box_size, box_size - corner_width>
          <-box_size + corner_width, 2*box_size, box_size - corner_width>
          corner_width
        }
        // Back right corner
        cylinder {
          <box_size - corner_width, -2*box_size, box_size - corner_width>
          <box_size - corner_width, 2*box_size, box_size - corner_width>
          corner_width
        }
        box {
          <-box_size + corner_width, -2*box_size, -box_size>
          <box_size - corner_width, 2*box_size,  box_size>
        }
        box {
          <-box_size, -2*box_size, -box_size + corner_width>
          <box_size, 2*box_size,  box_size - corner_width>
        }
    }
    box {
        <-box_size-0.001, -box_size, -box_size-0.001>
        <box_size+0.001, box_size, box_size+0.001>
    }
}

#declare glass_walls =
difference {
    object {
        clear_round_corner_box
        scale <1, glass_height*0.9999/box_size, 1>
    }
    object {
        clear_round_corner_box
        scale <(box_size-wall_thickness)/box_size, 2,
(box_size-wall_thickness)/box_size>
    }
    texture {
        finish {
            specular 1
            roughness 0.02
            ambient 0
            diffuse 0.1
            reflection {
                0.06, 0.45
                fresnel on
            }
            conserve_energy
        }
        pigment { Clear }
    }
    interior {
        ior 1.7
        fade_distance 1.0
        fade_power 2
    }
    photons {
        target
        refraction on
        //pass_through
        reflection on
        collect off
    }
}

 - dan B hentschel

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