GRAPH3D.BOX := TRUE
graph3d.minimumx := -10
graph3d.maximumx := 10
graph3d.minimumy := -10
graph3d.maximumy := 10
graph3d.minimumz := -30
graph3d.maximumz := 30
GRAPH3D.STEPSU := 100
GRAPH3D.STEPSV := 20
GRAPH3D.MINIMUMU := 0
GRAPH3D.MAXIMUMU := 8*PI
GRAPH3D.MINIMUMV := 0
GRAPH3D.MAXIMUMV := 2*PI
GRAPH3D( CYLINDRICAL( 8, U, U*cos(time) ))