Would this work? or too simple?
Howard
set cut_paste_input [stack 0]
version 6.3 v8
ColorWheel {
inputs 0
gamma 0.45
name ColorWheel1
selected true
xpos -6225
ypos 10704
}
Ramp {
output depth
p0 {562 48}
p1 {946 540}
name Ramp6
selected true
xpos -6225
ypos 10800
}
Colorspace {
colorspace_out HSV
name Colorspace1
selected true
xpos -6225
ypos 10890
}
Expression {
expr0 r*z
name Expression1
selected true
xpos -6225
ypos 10965
}
Colorspace {
colorspace_in HSV
name Colorspace2
selected true
xpos -6225
ypos 11053
}
>________________________________
> From: Lewis Saunders <[email protected]>
>To: [email protected]
>Sent: Friday, 26 October 2012, 11:58
>Subject: [Nuke-users] Re: change knob value based on channel value
>
>Ryan O'Phelan wrote:
>> I'm looking for a way to drive a hue rotation (as an example) with, say a
>> depth map. The larger the value, the more the hue rotation.
>
>You could do this with an expression node sampling the control image
>but I reckon there are easier ways. For transforms you can use
>that ITransform gizmo and for most colour corrections you can use
>mixes in the appropriate colour space. For anything else it's possible
>to use lots of ZSlice nodes to do arbitrary operations based on a
>control image... but I've been there and it mostly results in
>headaches, 100Mb scripts and huge caffeine consumption :-/
>
>Hue shifting you can kinda do with HSVTool but the method below is
>smoother when it wraps around the end of the rainbow.
>
>--
>Lewis Saunders
>deeply misses for loops in shake macros
>London
>
>
>
>
>Radial {
>area {512 389 1914 1464}
>name Radial1
>xpos -40
>ypos -13
>}
>CheckerBoard2 {
>inputs 0
>color0 {0.7 0 0 1}
>color1 {0 0.7 0 1}
>color2 {0 0 0.7 1}
>centerlinewidth 20
>name CheckerBoard1
>xpos -200
>ypos -144
>}
>Colorspace {
>colorspace_out HSV
>name Colorspace1
>xpos -200
>ypos -13
>}
>Merge2 {
>inputs 2
>operation plus
>Achannels {rgba.red -rgba.green -rgba.blue -rgba.alpha}
>Bchannels {rgba.red -rgba.green -rgba.blue -rgba.alpha}
>output {rgba.red -rgba.green -rgba.blue -rgba.alpha}
>mix 0.362
>name Plus
>xpos -200
>ypos 23
>}
>Colorspace {
>colorspace_in HSV
>name Colorspace2
>xpos -200
>ypos 59
>}
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