Skip to content

feat(mutators): Add eyelid blend mutation property to average out eye… #356

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
benaclejames merged 1 commit into from
Apr 20, 2026
Merged

feat(mutators): Add eyelid blend mutation property to average out eye… #356

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
38 changes: 30 additions & 8 deletions VRCFaceTracking.Core/Params/Data/Mutation/Correctors.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,11 @@ public class Correctors : TrackingMutation
public bool mouthClosedFix = true;
[MutationProperty("LipSuck Limiter", true)]
public bool lipSuckFix = true;

// How much "influence" the opposite eye has on openness
[MutationProperty("EyeLid Blend", true)]
public float eyeLidBlend = 0.0f; // 0.00f meaning zero influence, 1.00f meaning the value of each eyelid is the median of both


public override void MutateData(ref UnifiedTrackingData data)
{
Expand All @@ -32,14 +37,31 @@ public override void MutateData(ref UnifiedTrackingData data)

if (lipSuckFix)
{
data.Shapes[(int)UnifiedExpressions.LipSuckLowerLeft].Weight =
data.Shapes[(int)UnifiedExpressions.LipSuckLowerLeft].Weight * (1f - data.Shapes[(int)UnifiedExpressions.MouthLowerDownLeft].Weight);
data.Shapes[(int)UnifiedExpressions.LipSuckLowerRight].Weight =
data.Shapes[(int)UnifiedExpressions.LipSuckLowerRight].Weight * (1f - data.Shapes[(int)UnifiedExpressions.MouthLowerDownRight].Weight);
data.Shapes[(int)UnifiedExpressions.LipSuckUpperLeft].Weight =
data.Shapes[(int)UnifiedExpressions.LipSuckUpperLeft].Weight * (1f - data.Shapes[(int)UnifiedExpressions.MouthUpperUpLeft].Weight);
data.Shapes[(int)UnifiedExpressions.LipSuckUpperRight].Weight =
data.Shapes[(int)UnifiedExpressions.LipSuckUpperRight].Weight * (1f - data.Shapes[(int)UnifiedExpressions.MouthUpperUpRight].Weight);
data.Shapes[(int)UnifiedExpressions.LipSuckLowerLeft].Weight *= (1f - data.Shapes[(int)UnifiedExpressions.MouthLowerDownLeft].Weight);
data.Shapes[(int)UnifiedExpressions.LipSuckLowerRight].Weight *= (1f - data.Shapes[(int)UnifiedExpressions.MouthLowerDownRight].Weight);
data.Shapes[(int)UnifiedExpressions.LipSuckUpperLeft].Weight *= (1f - data.Shapes[(int)UnifiedExpressions.MouthUpperUpLeft].Weight);
data.Shapes[(int)UnifiedExpressions.LipSuckUpperRight].Weight *= (1f - data.Shapes[(int)UnifiedExpressions.MouthUpperUpRight].Weight);
}

if (eyeLidBlend > 0.00f)
{
// Half the blend because we don't want users swapping eyes unintentionally
var blend = eyeLidBlend * 0.5f;
var inverseBlend = 1.0f - blend;

// Pre-calculate what our parameters would end up using internally
var leftCalculated = data.Eye.Left.Openness * 0.75f + data.Shapes[(int)UnifiedExpressions.EyeWideLeft].Weight * 0.25f;
var rightCalculated = data.Eye.Right.Openness * 0.75f + data.Shapes[(int)UnifiedExpressions.EyeWideRight].Weight * 0.25f;

// Actual blending logic
var leftResultant = leftCalculated * inverseBlend + rightCalculated * blend;
var rightResultant = rightCalculated * inverseBlend + leftCalculated * blend;

// Solve for our original values
data.Eye.Left.Openness = Math.Clamp(leftResultant, 0.0f, 1.0f);
data.Shapes[(int)UnifiedExpressions.EyeWideLeft].Weight = Math.Clamp(leftResultant, 0.0f, 1.0f);
data.Eye.Right.Openness = Math.Clamp(rightResultant, 0.0f, 1.0f);
data.Shapes[(int)UnifiedExpressions.EyeWideRight].Weight = Math.Clamp(rightResultant, 0.0f, 1.0f);
}
}
}
Loading