set cut_paste_input [stack 0]
version 12.1 v1
push 0
push $cut_paste_input
Group {
inputs 2
name grade_Luminance
knobChanged "\nk = nuke.toNode('Keymix1')\n\nif nuke.thisKnob().name() == 'inputChange':\n    if nuke.thisNode().input(1) != None:\n        k\['maskChannel'].setValue('rgba.alpha')\n    else:\n        k\['maskChannel'].setValue('none')\n"
selected true
xpos 80
ypos 1250
addUserKnob {20 Main}
addUserKnob {41 blackpoint T MainGrade.blackpoint}
addUserKnob {41 whitepoint T MainGrade.whitepoint}
addUserKnob {41 black l lift T MainGrade.black}
addUserKnob {41 white l gain T MainGrade.white}
addUserKnob {41 multiply T MainGrade.multiply}
addUserKnob {41 add l offset T MainGrade.add}
addUserKnob {41 gamma T MainGrade.gamma}
addUserKnob {26 "" l "  "}
addUserKnob {6 Clamp l Clamp_bottom +STARTLINE}
addUserKnob {26 ""}
addUserKnob {41 maskChannel l "mask channel" T Keymix1.maskChannel}
addUserKnob {26 ""}
addUserKnob {26 Text l "" +STARTLINE T "Lightness grade by Pavel Uliashka, 2020"}
addUserKnob {20 Shadows}
addUserKnob {7 Offset R -0.7 0.7}
addUserKnob {7 Saturation R 0 2}
Saturation 1
addUserKnob {6 PreviewMask l "Preview Mask" +STARTLINE}
addUserKnob {41 lut l "" +STARTLINE T Keyer_Mask.lut}
}
Input {
inputs 0
name Input1
xpos 818
ypos 412
}
Colorspace {
colorspace_out CIE-Lab
name Colorspace4
xpos 818
ypos 489
}
Dot {
name Dot6
xpos 852
ypos 589
}
set Nc1a4c400 [stack 0]
Grade {
channels {rgba.red -rgba.green -rgba.blue none}
multiply 0.81
black_clamp false
name MainGrade
xpos 818
ypos 678
}
Dot {
name Dot3
xpos 852
ypos 750
}
set Nc1a85c00 [stack 0]
Dot {
name Dot1
xpos 989
ypos 750
}
Expression {
expr0 r<=0?max(abs(r),g,b):r
name Expression1
xpos 955
ypos 809
}
Group {
name Keyer_Mask
help "Rebuilt Nuke Keyer.  Non-clamped, so values can exceed 1.0.  Added LUT color controls, so you can perform gamma corrections or any other cc you desire.  Output is in the Alpha."
tile_color 0xff00ff
label "\[value opT]"
xpos 955
ypos 872
addUserKnob {20 CBuehler l "Keyer CB"}
addUserKnob {41 channels T Remove1.channels}
addUserKnob {41 opT l operation t "None of these operations are clamped.  They're all based on the in coming channels, which you can turn on and off as desired." T Expression2.opT}
addUserKnob {6 cMath l clamp -STARTLINE}
addUserKnob {6 iNv l invert -STARTLINE}
addUserKnob {6 keep0 l "keep 0" t "Anything that is the value of zero, will remain zero.  Great for premultiplied images." -STARTLINE}
addUserKnob {26 range l "range (alpha only)"}
addUserKnob {6 usecc l "<font size=\"3\"><font color=\"Goldenrod\">use CC" +STARTLINE}
usecc true
addUserKnob {35 APresets l "  " t "Alpha presets" -STARTLINE M {"alpha presets/4 points" "knob ColorLookup1.lut \{master \{\} red \{\} green \{\} blue \{\} alpha \{curve C 0 s0 u0 v0 1 s0 u0 v0 x1.1 1 s0 u0 v0 1 s0 u0 v0\}\}" "alpha presets/2 points" "knob ColorLookup1.lut \{master \{\} red \{\} green \{\} blue \{\} alpha \{curve C 0 s0 u0 v0 1 s0 u0 v0\}\}" "alpha presets/2 points smooth" "knob ColorLookup1.lut \{master \{\} red \{\} green \{\} blue \{\} alpha \{curve 0 s0 1 s0\}\}"}}
addUserKnob {41 choice l "  feather type" -STARTLINE T Expression.choice}
addUserKnob {41 lut l "" +STARTLINE T ColorLookup1.lut}
addUserKnob {32 Chad l ChadB t "Go to nukepedia.com to download the latest version, leave a comment/request or a bug." T "start http://www.vfxconnection.com/profile/Buehler" +STARTLINE}
addUserKnob {26 version l "" -STARTLINE T "               by Chad Buehler    v1.9  "}
}
Input {
inputs 0
name Input1
xpos 290
ypos 235
}
set Nc1a85000 [stack 0]
Dot {
name Dot1
xpos 178
ypos 398
}
push $Nc1a85000
Remove {
operation keep
channels {rgba.red -rgba.green -rgba.blue none}
name Remove1
xpos 290
ypos 301
}
Expression {
temp_name0 lumMax
temp_expr0 "((max(r, g, b))+(min(r, g, b)))/2"
temp_name1 deltaMax
temp_expr1 "max(r, g, b)-min(r, g, b)"
temp_name2 pick
temp_expr2 "opT==0?r:opT==1?g:opT==2?b:opT==3?1-(r-max(g,b)):opT==4?1-(g-max(r,b)):opT==5?1-(b-max(r,g)):opT==6?(r*.2125)+(g*.7154)+(b*.0721):opT==7?max(abs(lumMax<0.5?deltaMax/((max(r, g, b))+(min(r, g, b))):deltaMax/(2 -(max(r, g, b))-(min(r, g, b))))==inf?0:(lumMax<0.5?deltaMax/((max(r, g, b))+(min(r, g, b))):deltaMax/(2 -(max(r, g, b))-(min(r, g, b)))),0):opT==8?max(abs(deltaMax/max(r, g, b))==inf?0:(deltaMax/max(r, g, b)),0):opT==9?max(r,g,b):opT==10?min(r,g,b):opT==11?1-((1-r)-max(1-g,1-b)):opT==12?1-((1-g)-max(1-r,1-b)):opT==13?1-((1-b)-max(1-r,1-g)):0"
temp_name3 pf
temp_expr3 "abs(pick)==inf || isnan(pick)?0:pick"
expr3 pf
maskChannelMask -rgba.alpha
maskChannelInput -rgba.alpha
unpremult -rgba.alpha
name Expression2
xpos 290
ypos 346
addUserKnob {20 Buehler l User}
addUserKnob {4 opT l operation M {"red keyer" "green keyer" "blue keyer" redscreen greenscreen bluescreen "luminance key" "saturation key (HSL)" "saturation key (HSV)" "max keyer" "min keyer" cyanscreen magentascreen yellowscreen}}
}
Clamp {
channels alpha
maskChannelMask -rgba.alpha
maskChannelInput -rgba.alpha
unpremult -rgba.alpha
name Clamp1
xpos 290
ypos 408
disable {{!parent.cMath i}}
}
Invert {
channels alpha
maskChannelMask -rgba.alpha
maskChannelInput -rgba.alpha
unpremult -rgba.alpha
name Invert1
xpos 290
ypos 461
disable {{"iNv ==1  && keep0 == 0 ? 0 : 1" i}}
}
MergeExpression {
inputs 2
expr3 "Aa == 0 ? 0 : parent.iNv == 1 ? 1-Ba : Ba"
name MergeExpression3
xpos 290
ypos 535
disable {{"keep0 == 1 ? 0 : 1" i}}
}
ColorLookup {
lut {master {curve C k 0 s0 1 s0}
  red {}
  green {}
  blue {}
  alpha {}}
name ColorLookup1
xpos 290
ypos 591
disable {{!parent.usecc}}
}
Expression {
temp_name0 cl
temp_expr0 clamp(a)
expr3 "a >= 0 && a <= 1 ? choice == 1 ? cl*cl*(3 - 2*cl) : choice == 2 ? cl*(1 + cl*(1 - cl)) : choice == 3 ? cl*cl*(2 - cl) :  choice == 4 ? pow(cl, 3) : choice == 5 ? 1.01832 - exp(-4 * cl) : a : a"
name Expression
xpos 290
ypos 633
disable {{!parent.usecc i}}
addUserKnob {20 User}
addUserKnob {4 choice l "feather type" M {linear smooth smooth1 smooth0 plinear "ease in"}}
}
ModifyMetaData {
metadata {
 {set version "Keyer_CB 1.9"}
}
name MetaDataVersion
xpos 290
ypos 678
}
Output {
name Output1
xpos 290
ypos 723
}
end_group
Invert {
channels alpha
name Invert1
xpos 955
ypos 951
}
set Nc0f14400 [stack 0]
Dot {
name Dot9
xpos 1142
ypos 961
}
Shuffle {
red alpha
green alpha
blue alpha
out rgb
name Shuffle1
xpos 1108
ypos 1410
}
Input {
inputs 0
name Mask
label Mask
xpos 1226
ypos 405
number 1
}
Invert {
channels alpha
name Invert2
xpos 1226
ypos 869
}
Dot {
name Dot5
xpos 1260
ypos 1139
}
push $Nc1a4c400
Dot {
name Dot7
xpos 725
ypos 589
}
Dot {
name Dot8
xpos 725
ypos 1139
}
push $Nc0f14400
Dot {
name Dot2
xpos 989
ypos 1038
}
set Nc0f4a400 [stack 0]
Dot {
name Dot4
xpos 989
ypos 1064
}
push $Nc0f4a400
push $Nc1a85c00
Grade {
inputs 1+1
channels {-rgba.red rgba.green rgba.blue none}
multiply {{parent.Saturation}}
black_clamp false
name Saturation
xpos 818
ypos 1034
}
Grade {
inputs 1+1
channels {rgba.red -rgba.green -rgba.blue none}
add {{parent.Offset}}
black_clamp false
name Luminance
selected true
xpos 818
ypos 1060
}
Keymix {
inputs 3
name Keymix1
xpos 818
ypos 1129
}
Colorspace {
colorspace_in CIE-Lab
name Colorspace5
xpos 818
ypos 1194
}
Clamp {
maximum_enable false
name Clamp1
xpos 818
ypos 1274
disable {{!parent.Clamp}}
}
Switch {
inputs 2
which {{parent.PreviewMask.main}}
name Switch1
xpos 818
ypos 1410
}
Output {
name Output1
xpos 818
ypos 1507
}
end_group