private void EraseLoop(S2Loop v, int n)
{
for (int i = n - 1, j = 0; j < n; i = j++)
{
EraseEdge(v.Vertex(i), v.Vertex(j));
}
}
/** Erases all edges of the given loop and marks them as unused. */
private void RejectLoop(S2Loop v, int n, System.Collections.Generic.IList <S2Edge> unusedEdges)
{
for (int i = n - 1, j = 0; j < n; i = j++)
{
unusedEdges.Add(new S2Edge(v.Vertex(i), v.Vertex(j)));
}
}
/**
* Add all edges in the given loop. If the sign() of the loop is negative
* (i.e. this loop represents a hole), the reverse edges are added instead.
* This implies that "shells" are CCW and "holes" are CW, as required for the
* directed edges convention described above.
*
* This method does not take ownership of the loop.
*/
public void AddLoop(S2Loop loop)
{
var sign = loop.Sign;
for (var i = loop.NumVertices; i > 0; --i)
{
// Vertex indices need to be in the range [0, 2*num_vertices()-1].
AddEdge(loop.Vertex(i), loop.Vertex(i + sign));
}
}
protected override S2Point EdgeFrom(int index)
{
return(_this.Vertex(index));
}
