//Nondegenerate parabolic point animation //by Adam Coffman //June 2006 camera { location <-0.62,0.52,1.02> look_at <0,-0.15,0> } #include "colors.inc" #declare T=1/6*(sin(2*pi*(clock))); background{White} poly { 3 < 0,-2,0,2,0,0,0,0,0,0,0,0,0,0,0,-1,-2,0,-2*T,0> sturm pigment { brick rgb <0,0,0,0,0> rgb <0,0,1,0,.6> brick_size <50,0.035,50> mortar 0.005 translate <2,0.001+4*pow(abs(T/3),(3/2)),2> } bounded_by { cylinder{<0,3,0> <0,-3,0> 1/2 } } clipped_by { bounded_by } } light_source{<0.5,20,0> White} light_source{<-40,0,0.5> White shadowless} light_source{<40,0,0.5> White shadowless} light_source{<0,0.5,40> White shadowless}