public Timeline getContent(Timeline tl, BoundingBox wnd, double scale)
{
// assert: tl intersects wnd and is visible
// => tl is part of content
// => tl is loaded
// => return tl with ChildTimelines
var content = tl.clone();
content.isBuffered = true;
foreach (var child in tl.ChildTimelines)
{
if (child.intersects(wnd) && child.isVisible(scale))
content.ChildTimelines.Add(getContent(child, wnd, scale));
else
content.ChildTimelines.Add(child.clone());
}
return content;
}
public Timeline getPath(Timeline tl, BoundingBox wnd, ref Timeline lca)
{
// assert: tl contains wnd
// => tl is part of path
var path = tl.clone();
path.Exhibits = new List<Exhibit>();
lca = tl;
foreach (var child in tl.ChildTimelines)
{
if (child.contains(wnd))
{
path.ChildTimelines.Add(getPath(child, wnd, ref lca));
break;
}
}
return path;
}