Thank's for the script i try and is working ...

i have to do some test more i let you know

PR


news:3fa3650d@news.povray.org...
> /* how a slide projector might work in POV 3.5 */
>
> #version 3.5;
>
> global_settings {
>   assumed_gamma 1.0
>   photons {
>    spacing 0.003 // quality (lower better)
>   }
> }
>
> // ----------------------------------------
>
> camera {
>   location  <0, 3, -3>
>   right     x*image_width/image_height
>   look_at   <0, 1, 0>
> }
>
> light_source {
>   <0,0,0>, color rgb 1
>   looks_like {cone {-x/2,1/4,x/2,1/2 pigment {rgb 1} finish {ambient
0.5}}}
>   spotlight
>   radius 6 falloff 8
>   point_at x
>   rotate 45*y translate <-3, 0, 3>
> }
>
> // ----------------------------------------
>
> plane {
>   y, -1
>   texture {
>     pigment { checker color rgb 1 color blue 1 scale 0.5 }
>   }
>   photons {
>    collect off // no photons gathered here
>   }
> }
>
> /* MIRROR */
> box {-1,1 scale <1,1,.1>
>  pigment {rgb 0}
>  finish {ambient 0 diffuse 0 reflection {0.1,1}}
>   photons { // make visible to light rays
>    target
>    reflection on
>    refraction off
>   }
> }
>
> /* SCREEN */
> box {-1,1 scale <1,1,.1>
>  pigment {rgb 1}
>  finish {ambient 0 diffuse 0.5}
>  rotate 45*y translate <3,0,3>
>   photons { // make visible to light rays
>    //target
>    collect on
>   }
> }
>
> /* PICTURE */
> box {
>   0, 1
>   clipped_by {plane {-z,0}}
>   texture {
>     pigment {
>       image_map {
>         gif "test.gif"
>         interpolate 2 // smooth it
>         once   // don't tile image, just one copy
>         filter 0 0.5  // make 1st color half transparent
>         filter 1 1  // make 2nd color mostly transparent
>         filter 2 0.75  // make 3rd color 3/4 transparent
>       }
>       // transform it to unit-size (-1 to +1)
>     }
>     finish { ambient 0.3 }
>   }
>       translate -0.5*(x+y) // center on the origin
>       scale 2              // make it unit-sized
>       /* now fit in front of light */
>   scale <1,1,0.1>/4 rotate -45*y translate <-2,0,2>
>   photons { // make visible to light rays
>    target
>    reflection off
>    refraction off
>    pass_through // let light pass by
>    collect off // no photons gathered here
>   }
> }
>
> /////////////////////////
>
> There might be such an example scene file someplace else but I went ahead
> with my on try anyhow.
>
> Again, you may have already realized how to do this but you did not say
> exactly. I wanted to prove it could be done to some extent myself anyhow,
> and of course, with enough photons packed into the area the "projected"
> could be fine enough. Only slower and slower to parse, perhaps, depending
on
> the complexity of the objects used.
>
> Bob H.
>
>

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