public void update(float d)
{
var tasks = new ArrayList();
for (var i = 0; i < this.tasks_.Count; ++i)
{
Task task = this.tasks_[i] as Task;
task.update(d);
if (!task.isOver())
{
tasks.Add(task);
}
else
{
task.shutdown();
}
}
this.tasks_ = tasks;
}
