HueRotate.nk

set cut_paste_input [stack 0]
push $cut_paste_input
Group {
 name HueRotate
 addUserKnob {20 HueRotate_tab l HueRotate}
 addUserKnob {22 minus l - T "n = nuke.thisNode()\nrot = n\['rotate']\nrot.setValue(rot.getValue()-30)" +STARTLINE}
 addUserKnob {22 plus l + -STARTLINE T "n = nuke.thisNode()\nrot = n\['rotate']\nrot.setValue(rot.getValue()+30)"}
 addUserKnob {7 rotate t "hue angle in degrees to rotate input colors" R 0 360}
}
 Input {
  inputs 0
  name Input
  xpos -40
  ypos 20
 }
 Expression {
  temp_name0 M
  temp_expr0 max(r,g,b)
  temp_name1 C
  temp_expr1 M-min(r,g,b)
  temp_name2 H
  temp_expr2 ((C==0?0:r==M?((g-b)/C+6)%6:g==M?(b-r)/C+2:b==M?(r-g)/C+4:0)+shift)%6
  temp_name3 X
  temp_expr3 C*(1-fabs(H%2-1))
  expr0 (H<1?C:H<2?X:H<3?0:H<4?0:H<5?X:C)+min(r,g,b)
  expr1 (H<1?X:H<2?C:H<3?C:H<4?X:H<5?0:0)+min(r,g,b)
  expr2 (H<1?0:H<2?0:H<3?X:H<4?C:H<5?C:X)+min(r,g,b)
  expr3 H
  name Expression
  xpos -40
  ypos 52
  addUserKnob {20 HueRotate_tab l HueRotate}
  addUserKnob {7 shift R 0 6}
  shift {{6*radians(rotate)/pi/2}}
 }
 Output {
  name Output
  xpos -40
  ypos 80
 }
end_group