HDRI Probe - Normalisation

hdri_probe_normalisation.nkp

set cut_paste_input [stack 0]
version 10.5 v2
Read {
 inputs 0
 file /Users/kelsolaar/Downloads/grace_probe.hdr
 format "1000 1000 0 0 1000 1000 1 "
 origset true
 name grace_probe_Read
 label http://www.pauldebevec.com/Probes/grace_probe.hdr
 selected true
 xpos -17
 ypos -240
}
set N20735970 [stack 0]
push $N20735970
SphericalTransform {
 inputs 2
 input "Light Probe 360"
 format "1024 512 0 0 1024 512 1 1024_512"
 fix true
 name angular_to_latlong_SphericalTransform
 label "Transformation is incorrect but illustrates the purpose."
 selected true
 xpos -17
 ypos -144
}
set N2bccad50 [stack 0]
Group {
 name EnvConvolve
 help "A fast (FFT-based) approximation of brute force environment map convolution a la HDR Shop, using a Phong BRDF.  The output image is seamless and can be diffuse or specular.\n\nFor a diffuse surface, a 512*256 map will hold enough detail.  Higher resolution is required depending on how specular the surface is."
 label http://www.nukepedia.com/gizmos/filter/envconvolve/
 selected true
 xpos -17
 ypos -116
 addUserKnob {20 EnvConvolve l "Env Convolve"}
 addUserKnob {7 phexp l exponent t "Set to 1 is a diffuse surface.  Anything higher exponentially increases glossiness/specularity." R 1 200}
 phexp 1
}
 BackdropNode {
  inputs 0
  name BackdropNode12
  tile_color 0x8e8e3800
  label +Z
  note_font_size 24
  xpos -586
  ypos -495
  bdwidth 216
  bdheight 142
 }
 BackdropNode {
  inputs 0
  name BackdropNode18
  tile_color 0x7171c600
  label "Phong BRDF"
  note_font_size 24
  xpos -1331
  ypos -177
  bdwidth 197
  bdheight 176
 }
 BackdropNode {
  inputs 0
  name BackdropNode4
  tile_color 0x8e8e3800
  label -Z
  note_font_size 24
  xpos -925
  ypos -494
  bdwidth 216
  bdheight 142
 }
 Input {
  inputs 0
  name Input
  xpos -1033
  ypos -1072
 }
set N2ac010 [stack 0]
 Dot {
  name Dot4
  xpos -1492
  ypos -958
 }
 Dot {
  name Dot6
  xpos -1492
  ypos 856
 }
push $N2ac010
 Shuffle {
  red black
  green black
  blue black
  alpha white
  name Shuffle1
  xpos -1033
  ypos -763
 }
set N29f5b0 [stack 0]
 Reformat {
  type scale
  name Reformat3
  label "Pass through"
  xpos -723
  ypos -741
 }
 Expression {
  expr0 cos(2*PI*x/size.w+PI/2)*sin(PI*(y/size.h))
  expr1 cos(PI*(1-y/size.h))
  expr2 cos(2*PI*x/size.w)*sin(PI*(y/size.h))
  name Expression3
  label "latlong unit sphere"
  selected true
  xpos -723
  ypos -701
  postage_stamp true
  addUserKnob {20 User}
  addUserKnob {14 size R 0 100}
  size {{!proxy?input.width:(input.width/proxy_scale) i} {!proxy?input.height:(input.height/proxy_scale) i}}
 }
set N2bc066b0 [stack 0]
 Dot {
  name Dot3
  xpos -262
  ypos -666
 }
 Dot {
  name Dot2
  xpos -276
  ypos 397
 }
 Dot {
  name Dot1
  xpos -809
  ypos 397
 }
set N2bc5b0 [stack 0]
 Shuffle {
  alpha blue
  name Shuffle4
  label "Z direction to alpha"
  xpos -843
  ypos 704
 }
 Grade {
  channels alpha
  whitepoint 0.98
  gamma 0.8
  white_clamp true
  name Grade1
  xpos -843
  ypos 744
 }
push $N2bc5b0
 Group {
  name RotationMatrix3
  help "Use this for rotating xyz vector data such as P and N."
  xpos -776
  ypos 476
  addUserKnob {20 RotationMatrix}
  addUserKnob {13 rot l rotation t "Link to say axis' or camera's rotate.\nYaw = y axis.\nPitch = x axis.\nRoll = z axis."}
  rot {0 180 0}
 }
  Input {
   inputs 0
   name Input
   xpos -304
   ypos -17
  }
  ColorMatrix {
   matrix {
       {{cos(radians(yrot)) i} 0 {-sin(radians(yrot)) i}}
       {0 1 0}
       {{sin(radians(yrot)) i} 0 {cos(radians(yrot)) i}}
     }
   name ColorMatrix14
   label "yrot (yaw)"
   xpos -304
   ypos 89
   addUserKnob {20 "" l User}
   addUserKnob {7 yrot l "y rotation" R -90 90}
   yrot {{parent.rot.y i}}
  }
  ColorMatrix {
   matrix {
       {1 0 0}
       {0 {cos(radians(xrot)) i} {sin(radians(xrot)) i}}
       {0 {-sin(radians(xrot)) i} {cos(radians(xrot)) i}}
     }
   name ColorMatrix15
   label "xrot (pitch)\n"
   xpos -304
   ypos 127
   addUserKnob {20 "" l User}
   addUserKnob {7 xrot l "x rotation" R -90 90}
   xrot {{parent.rot.x i}}
  }
  ColorMatrix {
   matrix {
       {{cos(radians(zrot)) i} {sin(radians(zrot)) i} 0}
       {{-sin(radians(zrot)) i} {cos(radians(zrot)) i} 0}
       {0 0 1}
     }
   name ColorMatrix13
   label "zrot (roll)"
   xpos -304
   ypos 165
   addUserKnob {20 "" l User}
   addUserKnob {7 zrot l "z rotation" R -90 90}
   zrot {{parent.rot.z i}}
  }
  Output {
   name Output1
   xpos -304
   ypos 280
  }
 end_group
 Expression {
  temp_name0 radius
  temp_expr0 ".5/pi*acos(-b)/sqrt(r*r + g*g)"
  expr0 "0.5 + (r*radius)"
  expr1 "0.5 + (g*radius)"
  expr2 0
  name AngularMapProjection3
  xpos -776
  ypos 502
 }
push $N29f5b0
 Reformat {
  type scale
  scale {1 2}
  resize none
  name Reformat2
  xpos -1033
  ypos -335
 }
 Expression {
  expr0 (pi+atan(cx,cy))/(2*pi)
  expr1 sqrt((cx**2)+(cy**2))
  expr2 0
  name st2polar1
  xpos -1033
  ypos -291
 }
set N2bc32dd0 [stack 0]
push $N2bc32dd0
push $N29f5b0
 Reformat {
  type scale
  scale 2
  name Reformat1
  xpos -1230
  ypos -523
 }
 Expression {
  expr0 cos(2*PI*x/size.w+PI/2)*sin(PI*(y/size.h))
  expr1 cos(PI*(1-y/size.h))
  expr2 cos(2*PI*x/size.w)*sin(PI*(y/size.h))
  name Expression1
  label "latlong unit sphere"
  xpos -1230
  ypos -497
  postage_stamp true
  addUserKnob {20 User}
  addUserKnob {14 size R 0 100}
  size {{!proxy?input.width:(input.width/proxy_scale) i} {!proxy?input.height:(input.height/proxy_scale) i}}
 }
 Group {
  name RotationMatrix1
  help "Use this for rotating xyz vector data such as P and N."
  label identity
  xpos -1230
  ypos -409
  addUserKnob {20 RotationMatrix}
  addUserKnob {13 rot l rotation t "Link to say axis' or camera's rotate.\nYaw = y axis.\nPitch = x axis.\nRoll = z axis."}
  rot {0 90 -90}
 }
  Input {
   inputs 0
   name Input
   xpos -304
   ypos -17
  }
  ColorMatrix {
   matrix {
       {{cos(radians(yrot)) i} 0 {-sin(radians(yrot)) i}}
       {0 1 0}
       {{sin(radians(yrot)) i} 0 {cos(radians(yrot)) i}}
     }
   name ColorMatrix14
   label "yrot (yaw)"
   xpos -304
   ypos 89
   addUserKnob {20 "" l User}
   addUserKnob {7 yrot l "y rotation" R -90 90}
   yrot {{parent.rot.y i}}
  }
  ColorMatrix {
   matrix {
       {1 0 0}
       {0 {cos(radians(xrot)) i} {sin(radians(xrot)) i}}
       {0 {-sin(radians(xrot)) i} {cos(radians(xrot)) i}}
     }
   name ColorMatrix15
   label "xrot (pitch)\n"
   xpos -304
   ypos 127
   addUserKnob {20 "" l User}
   addUserKnob {7 xrot l "x rotation" R -90 90}
   xrot {{parent.rot.x i}}
  }
  ColorMatrix {
   matrix {
       {{cos(radians(zrot)) i} {sin(radians(zrot)) i} 0}
       {{-sin(radians(zrot)) i} {cos(radians(zrot)) i} 0}
       {0 0 1}
     }
   name ColorMatrix13
   label "zrot (roll)"
   xpos -304
   ypos 165
   addUserKnob {20 "" l User}
   addUserKnob {7 zrot l "z rotation" R -90 90}
   zrot {{parent.rot.z i}}
  }
  Output {
   name Output1
   xpos -304
   ypos 280
  }
 end_group
 Shuffle {
  red blue
  blue red
  name Shuffle3
  xpos -1230
  ypos -351
 }
 STMap {
  inputs 2
  channels rgb
  uv rgb
  name STMap25
  label "latlong to angular"
  xpos -1230
  ypos -298
 }
 CopyBBox {
  inputs 2
  name CopyBBox1
  xpos -1230
  ypos -260
 }
 Dot {
  name Dot9
  xpos -1196
  ypos -131
 }
set N2bc6be80 [stack 0]
 Shuffle {
  red black
  green black
  blue white
  name Shuffle2
  label "Make +z vector"
  xpos -1313
  ypos -121
 }
push $N2bc6be80
 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 -1230
  ypos -74
 }
 Expression {
  channel0 rgb
  expr0 pow(r,phexp)
  channel1 none
  channel2 {-rgba.red -rgba.green -rgba.blue none}
  channel3 {none none none -rgba.alpha}
  name PhongExponent1
  xpos -1230
  ypos -34
  addUserKnob {20 User}
  addUserKnob {7 phexp l "phong exponent" R 1 200}
  phexp {{parent.phexp.main i}}
 }
 FFT {
  channels rgb
  normalize_input true
  center_kernel true
  name FFT3
  xpos -863
  ypos 208
 }
set N29425640 [stack 0]
push $N2bc32dd0
push $N2bc066b0
 Group {
  name RotationMatrix4
  help "Use this for rotating xyz vector data such as P and N."
  label identity
  xpos -723
  ypos -593
  addUserKnob {20 RotationMatrix}
  addUserKnob {13 rot l rotation t "Link to say axis' or camera's rotate.\nYaw = y axis.\nPitch = x axis.\nRoll = z axis."}
  rot {0 90 -90}
 }
  Input {
   inputs 0
   name Input
   xpos -304
   ypos -17
  }
  ColorMatrix {
   matrix {
       {{cos(radians(yrot)) i} 0 {-sin(radians(yrot)) i}}
       {0 1 0}
       {{sin(radians(yrot)) i} 0 {cos(radians(yrot)) i}}
     }
   name ColorMatrix14
   label "yrot (yaw)"
   xpos -304
   ypos 89
   addUserKnob {20 "" l User}
   addUserKnob {7 yrot l "y rotation" R -90 90}
   yrot {{parent.rot.y i}}
  }
  ColorMatrix {
   matrix {
       {1 0 0}
       {0 {cos(radians(xrot)) i} {sin(radians(xrot)) i}}
       {0 {-sin(radians(xrot)) i} {cos(radians(xrot)) i}}
     }
   name ColorMatrix15
   label "xrot (pitch)\n"
   xpos -304
   ypos 127
   addUserKnob {20 "" l User}
   addUserKnob {7 xrot l "x rotation" R -90 90}
   xrot {{parent.rot.x i}}
  }
  ColorMatrix {
   matrix {
       {{cos(radians(zrot)) i} {sin(radians(zrot)) i} 0}
       {{-sin(radians(zrot)) i} {cos(radians(zrot)) i} 0}
       {0 0 1}
     }
   name ColorMatrix13
   label "zrot (roll)"
   xpos -304
   ypos 165
   addUserKnob {20 "" l User}
   addUserKnob {7 zrot l "z rotation" R -90 90}
   zrot {{parent.rot.z i}}
  }
  Output {
   name Output1
   xpos -304
   ypos 280
  }
 end_group
set Nc5fb200 [stack 0]
 Group {
  name RotationMatrix2
  help "Use this for rotating xyz vector data such as P and N."
  xpos -575
  ypos -440
  addUserKnob {20 RotationMatrix}
  addUserKnob {13 rot l rotation t "Link to say axis' or camera's rotate.\nYaw = y axis.\nPitch = x axis.\nRoll = z axis."}
  rot {0 180 0}
 }
  Input {
   inputs 0
   name Input
   xpos -304
   ypos -17
  }
  ColorMatrix {
   matrix {
       {{cos(radians(yrot)) i} 0 {-sin(radians(yrot)) i}}
       {0 1 0}
       {{sin(radians(yrot)) i} 0 {cos(radians(yrot)) i}}
     }
   name ColorMatrix14
   label "yrot (yaw)"
   xpos -304
   ypos 89
   addUserKnob {20 "" l User}
   addUserKnob {7 yrot l "y rotation" R -90 90}
   yrot {{parent.rot.y i}}
  }
  ColorMatrix {
   matrix {
       {1 0 0}
       {0 {cos(radians(xrot)) i} {sin(radians(xrot)) i}}
       {0 {-sin(radians(xrot)) i} {cos(radians(xrot)) i}}
     }
   name ColorMatrix15
   label "xrot (pitch)\n"
   xpos -304
   ypos 127
   addUserKnob {20 "" l User}
   addUserKnob {7 xrot l "x rotation" R -90 90}
   xrot {{parent.rot.x i}}
  }
  ColorMatrix {
   matrix {
       {{cos(radians(zrot)) i} {sin(radians(zrot)) i} 0}
       {{-sin(radians(zrot)) i} {cos(radians(zrot)) i} 0}
       {0 0 1}
     }
   name ColorMatrix13
   label "zrot (roll)"
   xpos -304
   ypos 165
   addUserKnob {20 "" l User}
   addUserKnob {7 zrot l "z rotation" R -90 90}
   zrot {{parent.rot.z i}}
  }
  Output {
   name Output1
   xpos -304
   ypos 280
  }
 end_group
 Expression {
  temp_name0 u
  temp_expr0 0.5*(1+atan(b,r)/pi)
  temp_name1 v
  temp_expr1 acos(-g)/pi
  expr0 u
  expr1 v
  expr2 0
  channel3 {none none none -rgba.alpha}
  name SphericalProjection6
  label "Convert normals \nto latlong UV coords"
  xpos -575
  ypos -414
 }
push $N2ac010
 Dot {
  name Dot5
  xpos -431
  ypos -630
 }
set N2bcbe560 [stack 0]
 STMap {
  inputs 2
  channels rgb
  uv rgb
  name STMap14
  xpos -465
  ypos -400
 }
 STMap {
  inputs 2
  channels rgb
  uv rgb
  name STMap15
  label "latlong to angular"
  xpos -682
  ypos 228
 }
 Group {
  inputs 2
  name FFTConvolve3
  xpos -682
  ypos 307
 }
  Input {
   inputs 0
   name brdf
   xpos -768
   ypos -542
   number 1
  }
  Input {
   inputs 0
   name probe
   xpos -592
   ypos -543
  }
  FFT {
   channels rgb
   name FFT1
   xpos -615
   ypos -466
  }
  FFTMultiply {
   inputs 2
   channels rgb
   name FFTMultiply4
   xpos -669
   ypos -404
  }
  InvFFT {
   channels rgb
   name InvFFT4
   xpos -669
   ypos -378
  }
  Output {
   name Output1
   xpos -669
   ypos -278
  }
 end_group
 STMap {
  inputs 2
  channels rgba
  uv rgb
  name STMap26
  xpos -682
  ypos 560
 }
push $N2bc5b0
 Expression {
  temp_name0 radius
  temp_expr0 ".5/pi*acos(-b)/sqrt(r*r + g*g)"
  expr0 "0.5 + (r*radius)"
  expr1 "0.5 + (g*radius)"
  expr2 0
  name AngularMapProjection
  xpos -964
  ypos 500
 }
push $N29425640
push $N2bc32dd0
push $Nc5fb200
 Expression {
  temp_name0 u
  temp_expr0 0.5*(1+atan(b,r)/pi)
  temp_name1 v
  temp_expr1 acos(-g)/pi
  expr0 u
  expr1 v
  expr2 0
  channel3 {none none none -rgba.alpha}
  name SphericalProjection5
  label "Convert normals \nto latlong UV coords"
  xpos -914
  ypos -413
 }
push $N2bcbe560
 STMap {
  inputs 2
  channels rgb
  uv rgb
  name STMap13
  xpos -804
  ypos -399
 }
 STMap {
  inputs 2
  channels rgb
  uv rgb
  name STMap12
  label "latlong to angular"
  xpos -1033
  ypos 209
 }
 Group {
  inputs 2
  name FFTConvolve1
  xpos -1033
  ypos 305
 }
  Input {
   inputs 0
   name brdf
   xpos -768
   ypos -542
   number 1
  }
  Input {
   inputs 0
   name probe
   xpos -592
   ypos -543
  }
  FFT {
   channels rgb
   name FFT1
   xpos -615
   ypos -466
  }
  FFTMultiply {
   inputs 2
   channels rgb
   name FFTMultiply4
   xpos -669
   ypos -404
  }
  InvFFT {
   channels rgb
   name InvFFT4
   xpos -669
   ypos -378
  }
  Output {
   name Output1
   xpos -669
   ypos -278
  }
 end_group
 STMap {
  inputs 2
  channels rgba
  uv rgb
  name STMap24
  xpos -1033
  ypos 566
 }
 Keymix {
  inputs 3
  channels rgb
  name Keymix3
  xpos -843
  ypos 852
 }
 CopyBBox {
  inputs 2
  name CopyBBox2
  xpos -843
  ypos 897
 }
 Output {
  name Output1
  xpos -843
  ypos 1015
 }
end_group
Saturation {
 saturation 0
 name desaturation_Saturation
 selected true
 xpos -17
 ypos -92
}
CurveTool {
 ROI {0 0 1024 512}
 autocropdata {256 128 768 384}
 intensitydata {{curve x1 0.505609585} {curve x1 0.505609585} {curve x1 0.505609585} {curve x1 0.7027262405}}
 name average_CurveTool
 selected true
 xpos -17
 ypos -68
}
push $N2bccad50
Multiply {
 value {{"1 / parent.average_CurveTool.intensitydata.r"}}
 name normalisation_Multiply
 selected true
 xpos 154
 ypos -72
}
Viewer {
 frame 1
 frame_range 1-100
 name Viewer1
 selected true
 xpos 154
 ypos -40
}