/// <summary>
/// 指定されたブレンドシェイプに、<see cref="BlendShapePreset.Neutral"/>、および<see cref="BlendShapePreset.Blink"/>に含まれるシェイプキーと
/// 同一のシェイプキーが含まれていれば、そのシェイプキーを複製します。
/// </summary>
/// <param name="avatar"></param>
/// <param name="clip"></param>
/// <param name="clips"></param>
/// <returns>置換後のVRMのブレンドシェイプ一覧。</returns>
private static IEnumerable <VRMBlendShapeClip> DuplicateShapeKeyToUnique(
GameObject avatar,
VRMBlendShapeClip clip,
IEnumerable <VRMBlendShapeClip> clips
)
{
string[] neutralAndBlinkShapeKeyNames = new[] { BlendShapePreset.Neutral, BlendShapePreset.Blink }
.Select(selector: blendShapePreset => clips.FirstOrDefault(c => c.Preset == blendShapePreset))
.SelectMany(selector: blendShapeClip =>
blendShapeClip ? blendShapeClip.ShapeKeyValues : new Dictionary <string, float>())
.Select(selector: nameAndWeight => nameAndWeight.Key)
.ToArray();
Mesh mesh = avatar.transform.Find(VRChatUtility.AutoBlinkMeshPath).GetSharedMesh();
foreach (var(oldName, weight) in clip.ShapeKeyValues)
{
if (!neutralAndBlinkShapeKeyNames.Contains(oldName))
{
continue;
}
var newName = BlendShapeReplacer.FeelingsShapeKeyPrefix + oldName;
var index = mesh.GetBlendShapeIndex(oldName);
var frameCount = mesh.GetBlendShapeFrameCount(index);
for (var i = 0; i < frameCount; i++)
{
var deltaVertices = new Vector3[mesh.vertexCount];
var deltaNormals = new Vector3[mesh.vertexCount];
var deltaTangents = new Vector3[mesh.vertexCount];
mesh.GetBlendShapeFrameVertices(index, i, deltaVertices, deltaNormals, deltaTangents);
mesh.AddBlendShapeFrame(
newName,
mesh.GetBlendShapeFrameWeight(shapeIndex: index, frameIndex: i),
deltaVertices,
deltaNormals,
deltaTangents
);
}
EditorUtility.SetDirty(mesh);
clips = VRMUtility.ReplaceShapeKeyName(clips, oldName, newName);
}
return(clips);
}
