public static void Rotate(IEnumerable <BaseShapeViewModel> shapes, decimal angle, IHistory?history)
{
var groupBox = new GroupBox(shapes.ToList());
if (groupBox.Boxes.Length <= 0)
{
return;
}
var boxes = groupBox.Boxes.ToList();
var previous = new List <(PointShapeViewModel point, decimal x, decimal y)>();
var next = new List <(PointShapeViewModel point, decimal x, decimal y)>();
var radians = angle * (decimal)Math.PI / 180m;
var centerX = groupBox.Bounds.CenterX;
var centerY = groupBox.Bounds.CenterY;
foreach (var point in boxes.SelectMany(box => box.Points).Distinct())
{
PointUtil.Rotate(point, radians, centerX, centerY, out var x, out var y);
previous.Add((point, (decimal)point.X, (decimal)point.Y));
next.Add((point, x, y));
point.X = (double)x;
point.Y = (double)y;
}
history?.Snapshot(previous, next, (p) => previous.ForEach(p =>
{
p.point.X = (double)p.x;
p.point.Y = (double)p.y;
}));
}