Thanks that helped! My documentation (ms-dos vertion) says OPEN would remove
the end CAPS .But
with you help I found that open only affects the lower end and you have to
close the high end yourself.
Even so 'sturm' has to be use on some complicated objects.
 Here what I think is the basic setup.
sor { 5
        <0,0>//  p1 slope for p2 & p3
        <0.2,0.3>// p2 without open this will be close to point <0,.3>
        <0.6,0.7>// p3
        <0,1>// p4 this is the point that you have to close yourself
        <0,1> // p5 this is the last slope and effects p4 and p3
  //sturm //open
    pigment {rgb 1}
 }

Bob Hughes wrote:

> 'sor' and 'lathe' can be particular about their closing ends, basically
> the idea is to kind of double-up on the end points (also make sure an
> 'open' keyword isn't in there) and using sturm might help in some cases
> too.
> Example:
> sor { 5 //change to 4 and comment out last <0,1> to see unclosed effect
>         <0,0>
>         <0.2,0.3>
>         <0.6,0.7>
>         <0,1>
>         <0,1> //here's the jist of it
>   //sturm //open
>     pigment {rgb 1}
>   rotate -30*x //30*x to see underside
>  }
>
> // 4 X 3 window and white pointlight at camera position
> #declare LCX = 0.0
> #declare LCY = 0.0
> #declare LCZ = -10.0    // (-6.32 = 4x3 view at <0,0,0> with angle 36)
>
> light_source { <LCX,LCY,LCZ> color rgb <1.5,1.5,1.5>
> }
> camera
> {
>   location  <LCX,LCY,LCZ>
>   angle 22.5   // angle 67 = direction 1
>   look_at   <0, 0, 0>
> }
>
> Leroy Whetstone wrote:
> >
> > I'm a newbe to POV and have lots of fun learning it. My question is
> > this: The SOR object don't want to close at the ends.Is this a bug? I
> > made a simple object. At some angles the top seems close.Then just
> > moving the camera a little it opens up. I realy like one test where half
> > the hole shadows like closed and you could still see the hole.
>
> --
>  omniVERSE: beyond the universe
>   http://members.aol.com/inversez/POVring.htm
>  mailto:inv### [at] aolcom?PoV

Post a reply to this message