private bool Reorder(IEnumerable <BSPImage> items)
{
var changed = false;
if (physics != null)
{
changed |= physics.Apply(items.Cast <IPhysicsItem>(), camera);
}
var index = 0;
foreach (var item in items)
{
if (physics == null && (!item.Transform.IsIdentity || item.Angle2D != 0))
{
item.LinearVelocity = new Vector3D();
item.AngularVelocity2D = 0;
item.AtRest = false;
var m = RewindMatrix(item.Transform, 0.8);
item.Transform = (Math.Abs(m.OffsetX) + Math.Abs(m.OffsetY) + Math.Abs(m.OffsetZ)) > 0.1
? m
: Matrix3D.Identity;
item.Angle2D = (Math.Abs(item.Angle2D) > 0.01)
? item.Angle2D * 0.8
: 0;
changed = true;
}
if (!item.Rendered)
{
photoCanvas.Children.Add(item.Visual);
item.Rendered = true;
changed = true;
}
if (!item.Visual.GetValue(Canvas.ZIndexProperty).Equals(index))
{
item.Visual.SetValue(Canvas.ZIndexProperty, index);
changed = true;
}
++index;
}
return(changed);
}