LinearGrade.nk

set cut_paste_input [stack 0]
push $cut_paste_input
Group {
 name LinearGrade
 addUserKnob {20 LinearGrade_tab l LinearGrade}
 addUserKnob {41 exposure T Expression.exposure}
 addUserKnob {41 c l contrast T Expression.c}
 addUserKnob {41 pivot T Expression.pivot}
 addUserKnob {41 off l offset T Expression.off}
}
 Input {
  inputs 0
  name Inputmask
  xpos -40
  ypos -201
  number 1
 }
 Input {
  inputs 0
  name Input
  xpos -150
  ypos -250
 }
 Expression {
  inputs 1+1
  temp_name0 m
  temp_expr0 (max(r,g,b))/p
  temp_name1 s
  temp_expr1 c==1?ex:m>0?pow(m,c-1)*ex:1
  expr0 (r+o)*s
  expr1 (g+o)*s
  expr2 (b+o)*s
  name Expression
  selected true
  xpos -150
  ypos -202
  addUserKnob {20 Params}
  addUserKnob {7 exposure R -6 6}
  addUserKnob {7 c l contrast R 0.1 2}
  c 1
  addUserKnob {7 pivot R -4 4}
  addUserKnob {7 off l offset R -0.02 0.02}
  addUserKnob {7 ex R 0 10}
  ex {{pow(2,exposure)}}
  addUserKnob {7 p R 0 4}
  p {{0.18*pow(2,pivot)}}
  addUserKnob {7 o R -0.02 0.02}
  o {{this.off}}
 }
 Output {
  name Output
  xpos -150
  ypos -154
 }
end_group