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Adds a Color Correct node (#1086)
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Wraps up existing adjustment nodes into an artist-friendly color correction node.
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@crydalch
crydalch authored Oct 14, 2022
1 parent 3cd49f6 commit 38669ab
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30 changes: 30 additions & 0 deletions libraries/stdlib/stdlib_defs.mtlx
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<input name="lumacoeffs" type="color3" value="0.2722287, 0.6740818, 0.0536895" enum="acescg, rec709, rec2020, rec2100" enumvalues="0.2722287,0.6740818,0.0536895, 0.2126,0.7152,0.0722, 0.2627,0.6780,0.0593, 0.2627,0.6780,0.0593" />
<output name="out" type="color4" defaultinput="in" />
</nodedef>

<!--
Node: <colorcorrect> Supplemental Node
Combines various adjustment nodes into one, artist-friendly color correction node.
The color4 signature does not touch the alpha channel.
-->
<nodedef name="ND_colorcorrect_color3" node="colorcorrect" nodegroup="adjustment">
<input name="in" type="color3" uiname="Input Color" value="1, 1, 1" doc="The input color to be adjusted." />
<input name="hue" type="float" uiname="Hue" uisoftmin="0.0" uisoftmax="1.0" value="0" doc="Rotates the color hue, with values wrapping at 0-1 boundaries." />
<input name="saturation" type="float" uiname="Saturation" uisoftmin="0.0" uisoftmax="1.0" value="1" doc="Adjusts the input color saturation level." />
<input name="gamma" type="float" uiname="Gamma" uisoftmin="0.0" uisoftmax="3.0" value="1" doc="Applies a gamma correction to the color." />
<input name="lift" type="float" uiname="Lift" uisoftmin="0.0" uisoftmax="1.0" value="0" doc="Raise the dark color values, leaving the white values unchanged." />
<input name="gain" type="float" uiname="Gain" uisoftmin="0.0" uisoftmax="1.0" value="1" doc="Multiplier increases lighter color values, leaving black values unchanged."/>
<input name="contrast" type="float" uiname="Contrast" uisoftmin="0.0" uisoftmax="1.0" value="1" doc="Linearly increase or decrease the color contrast." />
<input name="contrastpivot" type="float" uiname="Contrast Pivot" uisoftmin="0.0" uisoftmax="1.0" value="0.5" doc="Pivot value around which contrast applies. This value will not change as contrast is adjusted." />
<input name="exposure" type="float" uiname="Exposure" uisoftmin="-1.0" uisoftmax="1.0" value="0" doc="Multplier which increases or decreases color brightness by 2^value." />
<output name="out" type="color3" />
</nodedef>
<nodedef name="ND_colorcorrect_color4" node="colorcorrect" nodegroup="adjustment">
<input name="in" type="color4" uiname="Input Color" value="1, 1, 1, 0" doc="The input color to be adjusted." />
<input name="hue" type="float" uiname="Hue" uisoftmin="0.0" uisoftmax="1.0" value="0" doc="Rotates the color hue, with values wrapping at 0-1 boundaries." />
<input name="saturation" type="float" uiname="Saturation" uisoftmin="0.0" uisoftmax="1.0" value="1" doc="Adjusts the input color saturation level." />
<input name="gamma" type="float" uiname="Gamma" uisoftmin="0.0" uisoftmax="3.0" value="1" doc="Applies a gamma correction to the color." />
<input name="lift" type="float" uiname="Lift" uisoftmin="0.0" uisoftmax="1.0" value="0" doc="Raise the dark color values, leaving the white values unchanged." />
<input name="gain" type="float" uiname="Gain" uisoftmin="0.0" uisoftmax="1.0" value="1" doc="Multiplier increases lighter color values, leaving black values unchanged."/>
<input name="contrast" type="float" uiname="Contrast" uisoftmin="0.0" uisoftmax="1.0" value="1" doc="Linearly increase or decrease the color contrast." />
<input name="contrastpivot" type="float" uiname="Contrast Pivot" uisoftmin="0.0" uisoftmax="1.0" value="0.5" doc="Pivot value around which contrast applies. This value will not change as contrast is adjusted." />
<input name="exposure" type="float" uiname="Exposure" uisoftmin="-1.0" uisoftmax="1.0" value="0" doc="Multplier which increases or decreases color brightness by 2^value." />
<output name="out" type="color4" />
</nodedef>

<!-- ======================================================================== -->
<!-- Compositing nodes -->
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109 changes: 109 additions & 0 deletions libraries/stdlib/stdlib_ng.mtlx
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</mix>
<output name="out" type="color4" nodename="N_mix_color4" />
</nodegraph>

<!--
Node: <colorcorrect> Supplemental Node
Combines various adjustment nodes into one, artist-friendly color correction node.
-->
<nodegraph name="NG_colorcorrect_color3" nodedef="ND_colorcorrect_color3">
<input name="in" type="color3" />
<input name="hue" type="float" />
<input name="saturation" type="float" />
<input name="gamma" type="float" />
<input name="lift" type="float" />
<input name="gain" type="float" />
<input name="contrast" type="float" />
<input name="contrastpivot" type="float" />
<input name="exposure" type="float" />
<output name="out" type="color3" nodename="N_exposure" />
<multiply name="N_exposure" type="color3">
<input name="in1" type="color3" nodename="N_contrast" />
<input name="in2" type="float" nodename="N_exposurepwr" />
</multiply>
<contrast name="N_contrast" type="color3">
<input name="in" type="color3" nodename="N_gain" />
<input name="amount" type="float" interfacename="contrast" />
<input name="pivot" type="float" interfacename="contrastpivot" />
</contrast>
<power name="N_exposurepwr" type="float">
<input name="in2" type="float" interfacename="exposure" />
<input name="in1" type="float" value="2" />
</power>
<multiply name="N_gain" type="color3">
<input name="in1" type="color3" nodename="N_liftadd" />
<input name="in2" type="float" interfacename="gain" />
</multiply>
<add name="N_liftadd" type="color3">
<input name="in1" type="color3" nodename="N_liftmult" />
<input name="in2" type="float" interfacename="lift" />
</add>
<multiply name="N_liftmult" type="color3">
<input name="in1" type="color3" nodename="N_gamma" />
<input name="in2" type="float" nodename="N_liftsubtract" />
</multiply>
<range name="N_gamma" type="color3">
<input name="in" type="color3" nodename="N_saturation" />
<input name="gamma" type="float" interfacename="gamma" />
<input name="inlow" type="float" value="0" />
<input name="inhigh" type="float" value="1" />
<input name="outlow" type="float" value="0" />
<input name="outhigh" type="float" value="1" />
<input name="doclamp" type="boolean" value="false" />
</range>
<subtract name="N_liftsubtract" type="float">
<input name="in2" type="float" interfacename="lift"/>
<input name="in1" type="float" value="1" />
</subtract>
<saturate name="N_saturation" type="color3">
<input name="in" type="color3" nodename="N_hsvadjust" />
<input name="amount" type="float" interfacename="saturation"/>
<input name="lumacoeffs" type="color3" />
</saturate>
<hsvadjust name="N_hsvadjust" type="color3">
<input name="in" type="color3" interfacename="in" />
<input name="amount" type="vector3" nodename="N_parm2hue" />
</hsvadjust>
<combine3 name="N_parm2hue" type="vector3">
<input name="in1" type="float" interfacename="hue" />
<input name="in2" type="float" value="1" />
<input name="in3" type="float" value="1" />
</combine3>
</nodegraph>
<nodegraph name="NG_colorcorrect_color4" nodedef="ND_colorcorrect_color4">
<input name="in" type="color4" />
<input name="hue" type="float" />
<input name="saturation" type="float" />
<input name="gamma" type="float" />
<input name="lift" type="float" />
<input name="gain" type="float" />
<input name="contrast" type="float" />
<input name="contrastpivot" type="float" />
<input name="exposure" type="float" />
<output name="out" type="color4" nodename="N_combine_with_alpha" />
<separate4 name="N_split_color4" type="multioutput">
<input name="in" type="color4" interfacename="in" />
</separate4>
<combine3 name="N_combine_color" type="color3">
<input name="in1" type="float" nodename="N_split_color4" output="outr" />
<input name="in2" type="float" nodename="N_split_color4" output="outg" />
<input name="in3" type="float" nodename="N_split_color4" output="outb" />
</combine3>
<colorcorrect name="N_colorcorrect" type="color3">
<input name="in" type="color3" nodename="N_combine_color" />
<input name="hue" type="float" interfacename="hue" />
<input name="saturation" type="float" interfacename="saturation" />
<input name="gamma" type="float" interfacename="gamma" />
<input name="lift" type="float" interfacename="lift" />
<input name="gain" type="float" interfacename="gain" />
<input name="contrast" type="float" interfacename="contrast" />
<input name="contrastpivot" type="float" interfacename="contrastpivot" />
<input name="exposure" type="float" interfacename="exposure" />
</colorcorrect>
<separate3 name="N_split_color" type="multioutput">
<input name="in" type="color3" nodename="N_colorcorrect" />
</separate3>
<combine4 name="N_combine_with_alpha" type="color4">
<input name="in1" type="float" nodename="N_split_color" output="outr" />
<input name="in2" type="float" nodename="N_split_color" output="outg" />
<input name="in3" type="float" nodename="N_split_color" output="outb" />
<input name="in4" type="float" nodename="N_split_color4" output="outa" />
</combine4>
</nodegraph>

<!-- ======================================================================== -->
<!-- Compositing nodes -->
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