/// <summary>
/// Identify secondary structure: All members spanning directly between primary members
/// </summary>
/// <param name="members">The list of members to process (all members minus the primary members)</param>
/// <returns>The list of members identified as being part of the secondary structure</returns>
private IEnumerable <Beam> GetSecondarySupportStructure(IEnumerable <Member> Members)
{
HashSet <Beam> secondaryStructure;
secondaryStructure = new HashSet <Beam>();
foreach (var member in Members.Where(m => this.PrimaryMembers.SelectMany(pm => pm.ConnectedMembers).Contains(m)))
{
int primaryCount;
IEnumerable <Member> parallelMembers;
IEnumerable <Member> spanningMembers;
parallelMembers = MemberHelpers.GatherParallelMembers(member);
spanningMembers = this.GatherMembersBetweenPrimaryMembers(member, parallelMembers).ToList();
primaryCount = spanningMembers.SelectMany(m => m.Nodes).Distinct().Count(n => n.ConnectedBeams.Any(b => this.PrimaryBeams.Contains(b)));
if (primaryCount >= 2)
{
secondaryStructure.UnionWith(spanningMembers.SelectMany(m => m.Beams));
}
}
return(secondaryStructure.ToList());
}
/// <summary>
/// Identify primary structure: All members spanning directly between columns
/// </summary>
/// <param name="members">The list of members to process (all members)</param>
/// <returns>The list of members identified as being part of the primary structure</returns>
private IEnumerable <Beam> GetPrimarySupportStructure(IEnumerable <Member> Members)
{
IEnumerable <Member> columns;
HashSet <Beam> primaryStructure;
HashSet <Member> processedMembers;
primaryStructure = new HashSet <Beam>();
processedMembers = new HashSet <Member>();
// Identify primary structure: All members spanning directly between columns
columns = Members.Where(m => m.Type == MemberType.COLUMN);
foreach (var column in columns)
{
primaryStructure.UnionWith(column.Beams);
processedMembers.Add(column);
foreach (var connectedMember in column.ConnectedMembers.Except(processedMembers))
{
int columnCount;
IEnumerable <Member> parallelMembers;
IEnumerable <Member> spanningMembers;
parallelMembers = MemberHelpers.GatherParallelMembers(connectedMember);
spanningMembers = GatherMembersBetweenColumns(connectedMember, parallelMembers);
columnCount = spanningMembers.SelectMany(m => m.Nodes).Distinct().Count(n => n.ConnectedMembers.Any(m => m.Type == MemberType.COLUMN));
if (columnCount >= 2)
{
primaryStructure.UnionWith(spanningMembers.SelectMany(m => m.Beams));
}
processedMembers.UnionWith(spanningMembers);
}
}
return(primaryStructure);
}