Subject:
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Re: How can I hide an object in a frame?
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Newsgroups:
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lugnet.cad.ray
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Date:
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Mon, 17 Jun 2002 18:05:21 GMT
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Viewed:
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837 times
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Yes, it will work as Roland has suggested using a bunch of #if statements.
I have used this technique to make a parade of Classic Space vehicles
(I'll upload the movie soon) passing by the camera. I wanted to save memory
and parse time by only loading the vehicles which were inside the camera's
view at a particular time. So I did it like this:
#declare starting_offset_452 = starting_offset_885 + 22.5;
#declare offset_452 = starting_offset_452 - my_clock*parade_speed;
#if (offset_452 < 30 & offset_452 > -30)
#include "452 - Mobile Tracking Station.inc"
object { vehicle_452 translate <0, 0, offset_452> }
#end
Oh, and I just had an evil thought. If time is no concern and/or you have
infinite patience, a CSG 'difference' box edge at <0, 0, -2800> could also
be used to make your train disappear. This effect would be really cool,
kinda Tron-esque. (Or at least that's what the lil' devil on my shoulder is
telling me.)
In lugnet.cad.ray, Roland Melkert writes:
> Funny, I was thinking about this myself yesterday while testing some
> stuff. I think you've got to play around with major #IF structures based
> upon the clock variable.
>
> Roland.
>
> Eduardo Vazquez Harte wrote:
>
> > I'm making an animation where I need to hide pieces of a trains as they pass
> > the end of a track "just like in simcity games" How can I tell pov-ray to hide a
> > piece when it gets to <0,0,-2800> if the trains goes from <0,0,300> and it ends
> > at <0,0,-3200>?
> >
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