Subject:
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Re: Problem using difference
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Newsgroups:
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lugnet.cad.ray
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Date:
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Wed, 11 Apr 2001 05:22:32 GMT
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Viewed:
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959 times
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Hi Paul,
I'd like to thank you for your help on this. I assigned a clear pigment to the
box:
difference{
object { Scimitr2_dot_dat }
box { <40,-43,-360>,<350,85,280> pigment{color Clear}}
}
It never occurred to me to give the box a color. Of course, this has caused
some other problems as seen at
http://www.brickshelf.com/cgi-bin/gallery.cgi?i=41019
but I can attempt to fix some of these during the post rendering process.
Again, thank you.
Travis Dickinson
Paul Easter wrote:
> Well Travis,
> This one could have some error messages that may be appearing. I have been
> rendering most of the day today and have seen many different error messages.
>
> An example that works for me is;
> difference{
> box{<-60,-5,70>,<50,70,-30>
> #if (version >= 3.1) material #else texture #end { Color7 }}
> box{<10,-10,30>,<100,50,-100>
> #if (version >= 3.1) material #else texture #end { Color47 }}
> }
> If I didn't use a color on the "cutting" box, it would render all "cut"
> edges in black. Color 47 is "transparent white", it allows for the colors of
> the parts being "cut" to show.
>
> I have been working on a canopy piece lately, for now it is 3/4 ldraw and
> 1/4 pov. When I try to "cut" it with a box, I get several error messages,
> with the main one being; "Camera is inside a non-hollow object. Fog and
> participating media may not work as expected."
> When the "QUAL" variable is set to anything other than "0", the "cutting"
> box renders whole, like it is ignoring the difference instruction. This may
> have to do with the camera error. So far I have not figured out what is
> causing this error. The camera is really not inside something.
>
> This might be your problem too. Maybe someone else can help us both out.
>
> You might try this;
>
> object { Scimitr2_dot_dat
> clipped_by{
> difference{
> box {<-100000,-100000,-100000>,<100000,100000,100000>
> box { <40,-43,-360>,<350,85,280> }
> }}}
> The first box needs to be large enough to enclose your whole model.
> This is basically a box with a notch cut out. It doesn't cut the edges of
> the parts correctly, but if the rendering is small it isn't too noticable.
>
> Good luck!
>
> Paul
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Message is in Reply To:
 | | Re: Problem using difference
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| (...) Well Travis, This one could have some error messages that may be appearing. I have been rendering most of the day today and have seen many different error messages. An example that works for me is; difference{ box{<-60,-5,70>,<50,70,-30> #if (...) (24 years ago, 9-Apr-01, to lugnet.cad.ray)
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