void DeselectLine()
{
if (selected_line != null)
{
selected_line.SetSelected(false);
}
selected_line = null;
}
void SetSelectedLine(PathLineMain line)
{
if (selected_line != line)
{
DeselectLine();
line.SetSelected(true);
selected_line = line;
}
else
{
DeselectLine();
}
}
