// camera ------------------------
#declare Jump_Start  = 0.5;
#declare Jump_Height = 7;

#if (clock < Jump_Start )
 #declare Camera_Y = 1.00;
#else
 #declare Camera_Y = 1.00
   + Jump_Height*
     0.5*(1-cos(4*pi*(clock-Jump_Start)));
#end

camera{ angle 38
        location <3,Camera_Y,-20>
        right x*image_width/image_height
        look_at <-3,3,5>
        rotate<0,-360*(clock+0.1),0>
      }