Nuke vector field expressions

gistfile1.tcl

set cut_paste_input [stack 0]
version 7.0 v9
push $cut_paste_input
Expression {
 expr0 (x-width/2)/width
 expr1 (y-height/2)/height
 name Expression8
 label "Zoom blur vectors expression"
 selected true
 xpos -2723
 ypos 176
}
push $cut_paste_input
Expression {
 expr0 ((y-height/2)/height)
 expr1 -((x-width/2)/width)
 name Expression10
 label "circular vectors expression"
 selected true
 xpos -2536
 ypos 176
}
push $cut_paste_input
Expression {
 expr0 ((y-height/2)/height)
 expr1 ((x-width/2)/width)
 name Expression9
 label "Hyperbolic vectors expression"
 selected true
 xpos -2896
 ypos 176
}