/// <summary>
/// Constructor used by <c>Ring.Create</c>.
/// </summary>
/// <param name="edge">The dividers that define the perimeter of the ring</param>
protected Ring(RingMetrics metrics, List <Face> edge)
: base(metrics)
{
m_Edge = new IDivider[edge.Count];
m_Flag = 0;
for (int i = 0; i < m_Edge.Length; i++)
{
Face face = edge[i];
IDivider d = face.Divider;
// Check for a divider that's already marked as being totally built.
if (Topology.IsBuilt(d))
{
throw new Exception("Polygon - Wrong build status for component divider");
}
// Remember the divider and update polygon geometry
m_Edge[i] = d;
if (face.IsLeft)
{
d.Left = this;
}
else
{
d.Right = this;
}
}
}
/// <summary>
/// Sets flag bit(s)
/// </summary>
/// <param name="flag">The flag bit(s) to set</param>
/// <param name="setting">True to set, false to clear</param>
protected void SetFlag(RingFlag flag, bool setting)
{
if (setting)
{
m_Flag |= flag;
}
else
{
m_Flag &= (~flag);
}
}
/// <summary>
/// Is a flag bit set?
/// </summary>
/// <param name="flag">The flag(s) to check for (may be a combination of more
/// than one flag)</param>
/// <returns>True if any of the supplied flag bits are set</returns>
protected bool IsFlagSet(RingFlag flag)
{
return((m_Flag & flag) != 0);
}