relight.nk

#http://www.nukepedia.com/gizmos/other/relight v1.4 Michael Garrett
set cut_paste_input [stack 0]
version 9.0 v1
push $cut_paste_input
add_layer {N N.X N.Y N.Z}
add_layer {P P.X P.Y P.Z}
Group {
 name Relight
 help "Relight is driven by a Light (Light2 class) node and relights a 2D image based on rendered point positions and normal vectors in the vec input.  It also uses a camera to calculate specular.\n\nCurrently the cone in the spotlight light type matches the Nuke spotlight closely but not exactly, and the cone falloff knob is unsupported.\n\nAdditional features are diffuse wrap for simulating fill light, and energy conserving normalized specular, meaning that the specular intensity increases and decreases proportional to shininess."
 selected true
 xpos -138
 ypos -39
 addUserKnob {20 Relight}
 addUserKnob {6 use_alpha l "use alpha" +STARTLINE}
 addUserKnob {41 normal l "normal vectors" T Shuffle2.in}
 addUserKnob {41 point l "point positions" T Shuffle1.in}
 addUserKnob {4 camera t "The camera position is used to calculate the specular reflection.  Choose either a Nuke 3D camera (cam input) or, if available, derive the camera position from RenderMan OpenEXR metadata (vec input)." M {"nuke camera" "renderman openexr metadata" "" "" "" "" "" ""}}
 addUserKnob {22 loadExrReader l "load Exr reader" -STARTLINE T "def exrCam():  \n\tdef getMetadataMatrix(meta_list):\n\t  m = nuke.math.Matrix4()\n\t  try: \n\t\t  for i in range(0,16):\n\t\t\t  m\[i] = meta_list\[i]   \n\t  except:\n\t\t  m.makeIdentity()\n\t  return m\n \n\tn=nuke.thisNode()\n \n\thold=int(n\['frameHold'].value())\n \n\tcamMatrix = getMetadataMatrix(n.metadata('exr/worldToCamera',hold))\n \n\tflipZ=nuke.math.Matrix4()\n\tflipZ.makeIdentity()\n\tflipZ.scale(1,1,-1)\n \n\ttransposedMatrix = nuke.math.Matrix4(camMatrix)\n\ttransposedMatrix.transpose()\n\ttransposedMatrix=transposedMatrix*flipZ\n\tinvMatrix=transposedMatrix.inverse()\t\n \n\tn\['matrix'].setValue(invMatrix\[0],0)\n\tn\['matrix'].setValue(invMatrix\[1],1)\n\tn\['matrix'].setValue(invMatrix\[2],2)\n\tn\['matrix'].setValue(invMatrix\[3],3)\n\tn\['matrix'].setValue(invMatrix\[4],4)\n\tn\['matrix'].setValue(invMatrix\[5],5)\n\tn\['matrix'].setValue(invMatrix\[6],6)\n\tn\['matrix'].setValue(invMatrix\[7],7)\n\tn\['matrix'].setValue(invMatrix\[8],8)\n\tn\['matrix'].setValue(invMatrix\[9],9)\n\tn\['matrix'].setValue(invMatrix\[10],10)\n\tn\['matrix'].setValue(invMatrix\[11],11)\n\tn\['matrix'].setValue(invMatrix\[12],12)\n\tn\['matrix'].setValue(invMatrix\[13],13)\n\tn\['matrix'].setValue(invMatrix\[14],14)\n\tn\['matrix'].setValue(invMatrix\[15],15)\n\treturn"}
 addUserKnob {26 material l "Phong material"}
 addUserKnob {18 mcolor l color}
 mcolor {1 1 1}
 addUserKnob {6 mcolor_panelDropped l "panel dropped state" -STARTLINE +HIDDEN}
 addUserKnob {7 diffuse R 0 4}
 diffuse 0.18
 addUserKnob {7 wrap l "diffuse wrap" R 90 360}
 wrap 90
 addUserKnob {7 specular R 0 4}
 specular 0.8
 addUserKnob {6 energy_conserving l "energy conserving" t "This isn't a full blown \"energy conserving shader\" solution, but more of a test implementation of normalizing the specular so that the phong lobe area remains constant regardless of the shininess.  This can be visualized with a slice tool.  \n\nFor large specular sizes, this will diminish the overall spec intensity and for small tight spec sizes it will greatly increase the spec intensity, so watch out for massive overbrights and adjust accordingly. \n" +STARTLINE}
 energy_conserving true
 addUserKnob {7 shininess R 2 100}
 shininess 10
addUserKnob {20 Info}
addUserKnob {22 documentation l " Documentation / Feedback " T "import webbrowser\nwebbrowser.open(/'http://opennuke.github.io/relight_nk/')" +STARTLINE}
addUserKnob {26 ""}
addUserKnob {26 version l version: T 1.4}
addUserKnob {26 created l created: T "23/10/2010 by <a href=\\'http://www.nukepedia.com/gizmos/other/relight'> Michael Garrett.</a>"}
addUserKnob {26 source l source: T "23/10/2010 by <a href=\\'http://www.nukepedia.com/gizmos/other/relight'> Nukepedia.</a>"}
addUserKnob {26 licence l licence: T "<a href=\"https://github.com/openNuke/toolset/blob/master/LICENCE\">READ ME</a>"}
}
 BackdropNode {
  inputs 0
  name BackdropNode1
  tile_color 0x7171c600
  label "reflection vector"
  note_font_size 42
  xpos -438
  ypos -184
  bdwidth 482
  bdheight 608
 }
 BackdropNode {
  inputs 0
  name BackdropNode2
  tile_color 0x8e8e3800
  label directional
  note_font_size 42
  xpos -5
  ypos 601
  bdwidth 492
  bdheight 558
 }
 BackdropNode {
  inputs 0
  name BackdropNode3
  tile_color 0x8e8e3800
  label point
  note_font_size 42
  xpos 734
  ypos 532
  bdwidth 670
  bdheight 657
 }
 BackdropNode {
  inputs 0
  name BackdropNode5
  tile_color 0x7171c600
  label "spotlight cone maths"
  note_font_size 12
  xpos 1474
  ypos 620
  bdwidth 154
  bdheight 356
 }
 Input {
  inputs 0
  name vec
  xpos 217
  ypos -611
 }
 Dot {
  name Dot4
  xpos 251
  ypos -480
 }
set N4d8443b0 [stack 0]
 Dot {
  name Dot1
  xpos -458
  ypos -480
 }
 Dot {
  name Dot2
  xpos -475
  ypos 1269
 }
set N4d84c940 [stack 0]
push $N4d84c940
push $N4d8443b0
 Shuffle {
  in P
  out rgb
  name Shuffle1
  label "point to rgb"
  xpos 336
  ypos -338
 }
set N4d850c30 [stack 0]
 Expression {
  expr0 translate.x-r
  expr1 translate.y-g
  expr2 translate.z-b
  name VectorL
  xpos 1028
  ypos 547
  addUserKnob {20 User}
  addUserKnob {13 translate}
  translate {{"\[lindex \[lindex \[value Axis1.world_matrix] 0] 3]" i} {"\[lindex \[lindex \[value Axis1.world_matrix] 1] 3]" i} {"\[lindex \[lindex \[value Axis1.world_matrix] 2] 3]" i}}
 }
set N4d85da90 [stack 0]
 Expression {
  temp_name0 length
  temp_expr0 sqrt((r*r)+(g*g)+(b*b))
  expr0 r/length
  expr1 g/length
  expr2 b/length
  name Normalize4
  xpos 1028
  ypos 573
 }
set N4d86ab30 [stack 0]
push $N4d8443b0
 Shuffle {
  red black
  green black
  blue white
  name Shuffle6
  label "Make +z vector"
  xpos 228
  ypos 412
 }
 ColorMatrix {
  matrix {
      {{Axis1.world_matrix.0 i} {Axis1.world_matrix.1 i} {Axis1.world_matrix.2 i}}
      {{Axis1.world_matrix.4 i} {Axis1.world_matrix.5 i} {Axis1.world_matrix.6 i}}
      {{Axis1.world_matrix.8 i} {Axis1.world_matrix.9 i} {Axis1.world_matrix.10 i}}
    }
  name ColorMatrix3
  label rotation
  xpos 228
  ypos 488
 }
set N4d884600 [stack 0]
 Dot {
  name Dot9
  xpos 1538
  ypos 474
 }
 MergeExpression {
  inputs 2
  temp_name0 DotProduct
  temp_expr0 (Ar*Br)+(Ag*Bg)+(Ab*Bb)
  channel0 rgb
  expr0 max(0,DotProduct)
  name MergeExpression9
  label "Dot product (L.A)"
  xpos 1504
  ypos 670
 }
 Expression {
  temp_name0 radConeAngle
  temp_expr0 radians(LightKnobs.coneAngle/2)
  temp_name1 radInnerConeAngle
  temp_expr1 radians(LightKnobs.innerConeAngle/2)
  temp_name2 LdotA
  temp_expr2 r
  expr0 LdotA-cos(radConeAngle)
  expr1 cos(radInnerConeAngle)-cos(radConeAngle)
  expr2 0
  channel3 {none none none -rgba.alpha}
  maskChannelMask -rgba.alpha
  name Expression3
  label "Compare cosines of coneangles with L.A"
  xpos 1504
  ypos 770
 }
 Expression {
  expr0 clamp(r/g)
  name Expression1
  label "Divide and clamp from 0-1"
  xpos 1504
  ypos 844
 }
 Expression {
  channel0 rgb
  expr0 pow(r,2)
  channel1 {-rgba.red -rgba.green -rgba.blue none}
  channel2 {-rgba.red -rgba.green -rgba.blue none}
  name BasicConeFalloff
  xpos 1504
  ypos 929
 }
 Dot {
  name Dot19
  xpos 1538
  ypos 1261
 }
push $N4d85da90
 Dot {
  name Dot8
  xpos 772
  ypos 678
 }
 Dot {
  name Dot6
  xpos 772
  ypos 1165
 }
push $N4d86ab30
push $N4d850c30
push $N4d8443b0
push 0
 Switch {
  inputs 2
  which {{parent.camera i}}
  name Switch3
  selected true
  xpos 8
  ypos -394
 }
 Matrix {
  channels none
  matrix {
      {1 0 0 0}
      {0 1 0 0}
      {0 0 -1 0}
      {0 0 0 1}
    }
  name Matrix1
  label "working with callback in init.py"
  xpos -97
  ypos -360
  addUserKnob {20 User}
  addUserKnob {3 frameHold}
  frameHold {{frame i}}
  addUserKnob {3 doThis}
  doThis {{"\[python exrCam()]" i}}
 }
 Expression {
  temp_name0 R
  temp_expr0 Matrix1.matrix.3
  temp_name1 G
  temp_expr1 Matrix1.matrix.7
  temp_name2 B
  temp_expr2 Matrix1.matrix.11
  expr0 R
  expr1 G
  expr2 B
  name Expression5
  label "Get \"point world\" value \nof camera position"
  xpos -97
  ypos -281
 }
push $N4d8443b0
 Expression {
  temp_name0 R
  temp_expr0 Axis2.world_matrix.3
  temp_name1 G
  temp_expr1 Axis2.world_matrix.7
  temp_name2 B
  temp_expr2 Axis2.world_matrix.11
  expr0 R
  expr1 G
  expr2 B
  name Expression4
  label "Get \"point world\" value \nof camera position"
  xpos -305
  ypos -384
 }
 Switch {
  inputs 2
  which {{camera i}}
  name Switch2
  label "select method for getting camera position"
  xpos -305
  ypos -260
 }
 Merge2 {
  inputs 2
  operation minus
  Achannels rgb
  Bchannels rgb
  output {rgba.red rgba.green rgba.blue -rgba.alpha}
  maskChannelMask -rgba.alpha
  name Merge3
  label "Cam to surface \nlight ray direction"
  xpos -305
  ypos -52
 }
 Expression {
  temp_name0 length
  temp_expr0 sqrt((r*r)+(g*g)+(b*b))
  expr0 r/length
  expr1 g/length
  expr2 b/length
  name Normalize2
  xpos -305
  ypos 20
 }
set N3ba2e280 [stack 0]
 Dot {
  name Dot13
  xpos -387
  ypos 23
 }
 Dot {
  name Dot14
  xpos -387
  ypos 318
 }
push $N4d8443b0
 Shuffle {
  in N
  out rgb
  name Shuffle2
  label "normals to rgb"
  xpos 94
  ypos -337
 }
 Expression {
  temp_name0 length
  temp_expr0 sqrt((r*r)+(g*g)+(b*b))
  expr0 r/length
  expr1 g/length
  expr2 b/length
  name Normalize6
  xpos 94
  ypos -297
 }
set N3ba4fdf0 [stack 0]
 Dot {
  name Dot15
  xpos -36
  ypos 116
 }
set N3ba5c510 [stack 0]
push $N3ba2e280
 MergeExpression {
  inputs 2
  channel0 rgb
  expr0 (Ar*Br)+(Ag*Bg)+(Ab*Bb)
  channel1 {-rgba.red -rgba.green -rgba.blue none}
  channel2 {-rgba.red -rgba.green -rgba.blue none}
  channel3 {none none none -rgba.alpha}
  maskChannelMask -rgba.alpha
  name DotP1
  label I.N
  xpos -305
  ypos 106
 }
 Multiply {
  channels rgb
  value 2
  name Multiply5
  label *2
  xpos -305
  ypos 146
 }
 Dot {
  name Dot16
  xpos -271
  ypos 262
 }
push $N3ba5c510
 MergeExpression {
  inputs 2
  expr0 Ar*Br
  expr1 Ag*Bg
  expr2 Ab*Bb
  name MergeExpression5
  label *N
  xpos -70
  ypos 251
 }
 Merge2 {
  inputs 2
  operation minus
  name Merge6
  xpos -70
  ypos 314
 }
 Expression {
  temp_name0 length
  temp_expr0 sqrt((r*r)+(g*g)+(b*b))
  expr0 r/length
  expr1 g/length
  expr2 b/length
  name Normalize3
  xpos -70
  ypos 365
 }
 Dot {
  name Dot12
  xpos 557
  ypos 397
 }
set N3baa05d0 [stack 0]
 MergeExpression {
  inputs 2
  temp_name0 DotProduct
  temp_expr0 (Ar*Br)+(Ag*Bg)+(Ab*Bb)
  channel0 rgb
  expr0 max(0,DotProduct)
  name MergeExpression7
  label "Dot product (N.L)"
  xpos 877
  ypos 748
 }
 Expression {
  channel0 rgb
  expr0 "pow(r, shininess)"
  channel1 {-rgba.red -rgba.green -rgba.blue none}
  channel2 {-rgba.red -rgba.green -rgba.blue none}
  name shinyness1
  xpos 877
  ypos 837
  addUserKnob {20 User}
  addUserKnob {7 shininess R 0 10}
  shininess {{parent.shininess i}}
 }
 set C3bab0710 [stack 0]
 Expression {
  temp_name0 nfactor
  temp_expr0 (phexp+2)/(2*pi)
  channel0 rgb
  expr0 r*nfactor
  channel1 {-rgba.red -rgba.green -rgba.blue none}
  channel2 {-rgba.red -rgba.green -rgba.blue none}
  channel3 {none none none -rgba.alpha}
  name PhongNfactor
  xpos 877
  ypos 906
  disable {{!energy_conserving}}
  addUserKnob {20 User}
  addUserKnob {7 phexp}
  phexp {{parent.shininess}}
 }
 set C3babd250 [stack 0]
 Multiply {
  channels rgb
  value {{parent.specular i}}
  name Multiply1
  label "Spec white point"
  xpos 877
  ypos 1032
 }
 set C3bac9fe0 [stack 0]
push $N4d86ab30
push $N3ba4fdf0
 Dot {
  name Dot5
  xpos 1241
  ypos 340
 }
 Dot {
  name Dot7
  xpos 1241
  ypos 583
 }
set N3bad8680 [stack 0]
 MergeExpression {
  inputs 2
  temp_name0 DotProduct
  temp_expr0 (Ar*Br)+(Ag*Bg)+(Ab*Bb)
  channel0 rgb
  expr0 max(0,DotProduct)
  name MergeExpression2
  label "Dot product (N.L)"
  xpos 1128
  ypos 742
 }
push $N4d86ab30
push $N3bad8680
 MergeExpression {
  inputs 2
  temp_name0 DotProduct
  temp_expr0 (Ar*Br)+(Ag*Bg)+(Ab*Bb)
  channel0 {rgba.red rgba.green rgba.blue -rgba.alpha}
  expr0 "max(0, (1-acos(DotProduct)/radians(wrap)))"
  channel1 none
  channel2 none
  channel3 none
  unpremult -rgba.alpha
  name MergeExpression6
  label DotProduct_LightWrap
  xpos 1287
  ypos 741
  addUserKnob {20 User}
  addUserKnob {7 wrap R 90 360}
  wrap {{parent.wrap.main i}}
 }
 Merge2 {
  inputs 2
  operation max
  name Max1
  xpos 1206
  ypos 816
 }
 Multiply {
  channels rgb
  value {{parent.diffuse i}}
  name Multiply4
  label "Diffuse white point"
  xpos 1206
  ypos 1004
 }
 set C3e505e80 [stack 0]
 Multiply {
  channels rgb
  value {{mcolor i} {mcolor i} {mcolor i} 1}
  name Multiply2
  label "Material colour"
  xpos 1206
  ypos 1044
 }
 set C3e510240 [stack 0]
 Merge2 {
  inputs 2
  operation plus
  name Merge2
  xpos 1048
  ypos 1123
 }
 MergeExpression {
  inputs 2
  temp_name0 length
  temp_expr0 sqrt((Ar*Ar)+(Ag*Ag)+(Ab*Ab))
  channel0 rgb
  expr0 Br/pow(length,falloffval)
  channel1 {-rgba.red -rgba.green -rgba.blue none}
  channel2 {-rgba.red -rgba.green -rgba.blue none}
  name OverallFalloff1
  xpos 1048
  ypos 1161
  addUserKnob {20 User}
  addUserKnob {7 falloffval R 0 3}
  falloffval {{parent.LightKnobs.falloff_type i}}
 }
set N3e527de0 [stack 0]
 Merge2 {
  inputs 2
  operation multiply
  Achannels rgb
  Bchannels rgb
  output rgb
  name Merge5
  xpos 1048
  ypos 1257
 }
push $N3baa05d0
push $N4d884600
 MergeExpression {
  inputs 2
  temp_name0 DotProduct
  temp_expr0 (Ar*Br)+(Ag*Bg)+(Ab*Bb)
  channel0 rgb
  expr0 max(0,DotProduct)
  name MergeExpression1
  label "Dot product"
  xpos 315
  ypos 732
 }
clone $C3bab0710 {
  xpos 315
  ypos 845
  selected false
 }
clone $C3babd250 {
  xpos 316
  ypos 912
  selected false
 }
clone $C3bac9fe0 {
  xpos 315
  ypos 996
  selected false
 }
push $N3ba4fdf0
 Dot {
  name Dot3
  xpos 77
  ypos 551
 }
set N3e570080 [stack 0]
push $N4d884600
 MergeExpression {
  inputs 2
  temp_name0 DotProduct
  temp_expr0 (Ar*Br)+(Ag*Bg)+(Ab*Bb)
  channel0 rgb
  expr0 max(0,DotProduct)
  name MergeExpression3
  label "Dot product (N.L)"
  xpos 43
  ypos 734
 }
push $N3e570080
push $N4d884600
 MergeExpression {
  inputs 2
  temp_name0 DotProduct
  temp_expr0 (Ar*Br)+(Ag*Bg)+(Ab*Bb)
  channel0 {rgba.red rgba.green rgba.blue -rgba.alpha}
  expr0 "max(0, (1-acos(DotProduct)/radians(wrap)))"
  channel1 none
  channel2 none
  channel3 none
  unpremult -rgba.alpha
  name MergeExpression4
  label DotProduct_LightWrap
  xpos 177
  ypos 736
  addUserKnob {20 User}
  addUserKnob {7 wrap R 90 360}
  wrap {{parent.wrap i}}
 }
 Merge2 {
  inputs 2
  operation max
  name Max
  xpos 113
  ypos 852
 }
clone $C3e505e80 {
  xpos 113
  ypos 953
  selected false
 }
clone $C3e510240 {
  xpos 113
  ypos 1012
  selected false
 }
 Merge2 {
  inputs 2
  operation plus
  name Merge1
  xpos 231
  ypos 1123
 }
push $N3e527de0
 Switch {
  inputs 3
  which {{parent.LightKnobs.light_type i}}
  name Switch1
  label "Light type"
  xpos 601
  ypos 1337
 }
 Multiply {
  channels rgb
  value {{parent.LightKnobs.intensity i}}
  name Multiply6
  label "Light intensity"
  xpos 601
  ypos 1401
 }
 Multiply {
  channels rgb
  value {{parent.LightKnobs.lcolor i} {parent.LightKnobs.lcolor i} {parent.LightKnobs.lcolor i} 1}
  name Multiply3
  label "Light colour"
  xpos 601
  ypos 1465
  disable {{"!\[exists parent.input1]" i}}
 }
 Expression {
  expr0 isnan(r)?0:r
  expr1 isnan(g)?0:g
  expr2 isnan(b)?0:b
  name Expression2
  label isnan
  xpos 601
  ypos 1515
 }
 Keymix {
  inputs 3
  channels rgb
  invertMask true
  name Keymix1
  xpos 601
  ypos 1595
  disable {{!use_alpha i}}
 }
 Output {
  name Output1
  xpos 601
  ypos 1681
 }
 Input {
  inputs 0
  name light
  xpos 657
  ypos -613
  number 1
 }
set N3e5efc60 [stack 0]
 Axis2 {
  selectable false
  name Axis1
  xpos 667
  ypos -524
 }
 Input {
  inputs 0
  name cam
  xpos -302
  ypos -609
  number 2
 }
 Axis2 {
  name Axis2
  xpos -292
  ypos -541
 }
push $N3e5efc60
 Shuffle {
  red black
  green black
  blue black
  alpha black
  name LightKnobs
  xpos 895
  ypos -323
  disable {{"!\[exists parent.input1]" i}}
  addUserKnob {20 User}
  addUserKnob {3 light_type l "light type"}
  light_type {{"\[input \[node this.parent] 1].light_type" i}}
  addUserKnob {18 lcolor l color}
  lcolor {{"\[input \[node this.parent] 1].color" i} {"\[input \[node this.parent] 1].color" i} {"\[input \[node this.parent] 1].color" i}}
  addUserKnob {6 lcolor_panelDropped l "panel dropped state" -STARTLINE +HIDDEN}
  addUserKnob {7 intensity R 0 50}
  intensity {{"\[input \[node this.parent] 1].intensity" i}}
  addUserKnob {7 cone_angle l "cone angle" R 0 180}
  cone_angle {{"\[input \[node this.parent] 1].cone_angle" i}}
  addUserKnob {7 cone_penumbra_angle l "cone penumbra angle" R -60 60}
  cone_penumbra_angle {{"\[input \[node this.parent] 1].cone_penumbra_angle" i}}
  addUserKnob {7 cone_falloff l "cone falloff" R 0 1000}
  cone_falloff {{"\[input \[node this.parent] 1].cone_falloff" i}}
  addUserKnob {3 falloff_type l "falloff type"}
  falloff_type {{"\[input \[node this.parent] 1].falloff_type" i}}
  addUserKnob {26 modified}
  addUserKnob {7 coneAngle R 0 180}
  coneAngle {{cone_penumbra_angle<=0?cone_angle:cone_angle+cone_penumbra_angle i}}
  addUserKnob {7 innerConeAngle R 0 180}
  innerConeAngle {{cone_penumbra_angle>0?cone_angle:cone_angle+cone_penumbra_angle i}}
 }
end_group