> 
> 't' is the fourth float in a 4D vector, as used in julia_fractal for
> example.  That's why it remains zero, it isn't seeing a 4D vector present.
> I don't know of a dot to get filter or transmit.
> 

Yes, thanks, I actually knew that once and forgot it again :) Looking at the
docs, it seems I can use .red .green .blue .transmit and .filter, and .x .y
.z works for the first 3 (but .t not for the 4th).

-- 
#macro C(X,Y)cylinder{X*x<X,0,-Y/2>.1}#end#macro U(R,X,Y)intersection{torus{.9
.1}box{-1 0rotate y*R*90}translate<X,0,Y>scale 1-z*.5}#end union{U(0,0,0)U(1,0
,0)U(2,-1,-1)U(1,1,0)U(1,1.5,-3)U(1,2,0)U(3,1,0)U(2,2,0)U(0,3,0)U(3,2,.5)C(.1,
2)C(.8,1)C(.8,-1)C(1.1,1)C(1.9,-1)pigment{rgb 10}rotate x*90translate<-1,0,4>}

Post a reply to this message