Patrick Elliott napsal(a):
> Decided to rework the design of the octahedron, so that it *should* 
> allow me to do this:
> 
> #declare octoside = {blah}
> 
> union {
>   object {octoside
>           rotate <0,90,0>}
>   ...
> }
> 
> and get the result I want. The problem is, this is as far as I got:
> 
> camera{
>         orthographic
>         location <0,sqrt(2)/2,-3> look_at <0,sqrt(2)/2,0> angle 60
>         right x up y
> }
> 
> light_source{<5,5,-10>,1.5}
> 
> //intersection {
>   union {
>     sphere {<-1,0,0>,0.075}
>     sphere {<1,0,0>,0.075}
>     sphere {<0,sqrt(2),0>,0.075}
>     cylinder {<-1,0,0>,<1,0,0>,0.075}
>     cylinder {<0,sqrt(2),0>,<1,0,0>,0.075}
>     cylinder {<-1,0,0>,<0,sqrt(2),0>,0.075}
>     texture {
>       pigment {rgb <1,1,1>}
>     }
>     //triangle {<-1,0,-0.075>,<0,sqrt(2),-0.075>,<1,0,-0.075>}
>     //triangle {<-1,0,0.075>,<0,sqrt(2),0.075>,<1,0,0.075>}
>   //rotate <45,0,0> <- test purposes, move to last statement in final 
> object, with translate.
>   //translate <0,0,-1>
>   }
> //  box {<-1,0,-0.075>,<1,sqrt(2),0.075>}
> //
> //}
> 
> Neeless to say, since the original used intersection, I took a chance on 
> that working. It didn't. The **best** solution would be if I could tie 
> triangles to the center points and weld them to the main object, to 
> produce a solid, or at least one solid enough to cut sections out of and 
> have material left behind, instead of a hollow shell with a hole in it. 
> It only get worse if I want to late make a crystal version, or some 
> other such thing, where the entire inside has to be solid, instead of it 
> being hollow. There has got to be some means I can fill in the sides, 
> like I want, and also the rest of the interior of the final object. I am 
> just not seeing it at the moment. And, if its something blindingly 
> obvious, like using triangles some how, then I can even set the exact 
> points I want, instead of using the 45 degree angle trick and computing 
> the sqrt(2) length for the side being rotated into place. Can't imaging 
> why I didn't try something like this before... lol Might have been 
> easier to model this bloody thing as a patch.
> 
When I think about it now, wouldn't it be possible to use a superellipsoid?

-- 
You know you've been raytracing too long when...
you ever saw a beautiful scenerey and regretted not to take your 6" 
reflective ball and a digital camera, thinking "this would have been a 
perfect light probe"
-Johnny D

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