public void Do()
{
(var min, var max) = TargetVertices.Select(vtx => vtx.UV.ToVector2()).MinMax();
var center = ((min + max) / 2).ToVector3();
bool XorBoth = ReverseAxis != Axis.Y;
bool YorBoth = ReverseAxis != Axis.X;
Matrix reverser = Matrix.Invert(Matrix.Translation(center)) * Matrix.Scaling(XorBoth ? -1 : 1, YorBoth ? -1 : 1, 1) * Matrix.Translation(center);
TargetVertices.AsParallel().ForAll(vtx => vtx.UV = Vector2.TransformCoordinate(vtx.UV, reverser));
}
public void Undo()
{
TargetVertices.AsParallel().ForAll(vtx => vtx.UV = PreviousUV[vtx]);
}
public void Do()
{
PreviousUV = TargetVertices.AsParallel().ToDictionary(v => v, v => v.UV.Clone());
TargetVertices.AsParallel().ForAll(vtx => vtx.UV = Vector2.TransformCoordinate(vtx.UV, Offset));
}