Correct! You learn fast I see. I just never can remember it all without
looking back at the DOC all the time. Version 3.1d has improved upon the
speed of these sor and lathe primitives greatly too. However I don't
know if they still cause a fatal error on occasion if the shape is not
conformable enough to what POV-Ray wants to do. Sturm may help when it
works halfway right but there are times the shape is just too wrong to
render apparently. Like I say though, it might be better than before.


Leroy Whetstone wrote:
> 
> 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

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/POVring.htm
 mailto:inv### [at] aolcom?PoV

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