You guys are stars. It worked almost perfectly the first time.


Mike Williams <nos### [at] econymdemoncouk> wrote:
> Wasn't it dave who wrote:
> >how can you use an arbitrary image as a background in a pov file? i want to
> >put a photograph as the background, then generate my image over top of it.
> >any ideas?
> >
> >as i am very new, the script would be helpful.
>
> An easy way to do it is to use "screen.inc". Look at the demo file
> incdemo/screen.pov that came with the POV distribution for lots of
> comments on how the system works.
>
> To use screen.inc, you replace your camera statements by a call to
> Set_Camera(), and then you can place your background by calling
> Screen_Plane().
>
>
> #include "screen.inc"
> Set_Camera(<25,15,-33>, <2,2,0>, 70) // set location, look_at and angle
> #declare MyScreenTexture =
> texture {
>    pigment { image_map { png "test.png" interpolate 2 } }
>    finish {ambient 1 diffuse 0} // Don't want any shadows on it
>    scale 0.5 translate <0.5,0.5,0> // move it into the <0,0><1,1> region
> }
> // Make screen plane with the texture MyScreenTexture and scale
> // it by 1000 to move it far from the camera.
> // Place the bottom corner of the photo
> //          at the bottom corner of the screen <0,0>
> // Place the top corner of the photo
> //          at the top corner of the screen <1,1>
> Screen_Plane ( MyScreenTexture, 100000, <-1,-1>, <1,1> )
>
>
> If your photo isn't in the correct aspect ratio it will get stretched to
> fit.
>
> If you want more complicated camera settings you can call things like
> Set_Camera_Sky() and Set_Camera_Aspect_Ratio().
>
> [It's possible to take a bit of a short cut by omitting the scale and
> translate and then using
> Screen_Plane ( MyScreenTexture, 100000, <0,0>, <1,1> )
> but I thought I'd show the calls being used in the way that they're
> documented].
>
> --
> Mike Williams
> Gentleman of Leisure

Post a reply to this message