/// <summary>
/// Split this division edge into two pieces, being shorter
/// MeshDivisionEdges which together contain the division
/// vertices of this edge.
/// </summary>
/// <param name="atIndex">The index of the vertex in this edge's
/// Vertices collection at which the split will occur. This
/// will be the last vertex of the first sub-edge and the first
/// vertex of the second.</param>
/// <returns>An array containing two new MeshDivisionEdges, or
/// null if the split failed.</returns>
public MeshDivisionEdge[] Split(int atIndex)
{
if (atIndex > 0 && atIndex < Vertices.Count - 1)
{
Vertex splitVert = Vertices[atIndex];
// Create sub-edges
MeshDivisionEdge edge1 = new MeshDivisionEdge(Start, splitVert);
MeshDivisionEdge edge2 = new MeshDivisionEdge(splitVert, End);
// Populate sub-edge vertices
for (int i = 0; i < Vertices.Count; i++)
{
Vertex v = Vertices[i];
if (i <= atIndex)
{
edge1.Vertices.Add(v);
}
if (i >= atIndex)
{
edge2.Vertices.Add(v);
}
}
return(new MeshDivisionEdge[] { edge1, edge2 });
}
else
{
return(null);
}
}
/// <summary>
/// Get a copy of this edge with the direction reversed
/// </summary>
/// <returns></returns>
public MeshDivisionEdge Reversed()
{
var result = new MeshDivisionEdge(End, Start);
for (int i = _Vertices.Count - 1; i >= 0; i--)
{
result.Vertices.Add(_Vertices[i]);
}
return(result);
}
