"david sharp" <dav### [at] rcncom> wrote in message
news:3d7c04ec@news.povray.org...
> Trying to get POV 3.5 spline object to behave.

Looks like a decent start on a roller coaster. :)


--
light_source{0,1}#macro c(J,a)sphere{0,1pigment{rgb z}scale a translate J+O}
#end#macro B(R,V,O)c(0,4)intersection{c(V,R)difference{c(-z*4x+10)c(-z*4.1x+
10)c(0<7.5,45,5>)}}#end B(12,0z*25)B(8y*4<0,12,50>)          // Batronyx ^"^

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