// Get a list of unique vertices adjacent to (u,v,k).
// See also, (Vertex) Identical.
func (vert Vertex) Adjacents() []Vertex {
var identVerts = vert.IdenticalVertices()
var adjVerts = make([]Vertex, len(identVerts))
for i, vert := range identVerts {
adjVerts[i] = Vertex{vert.U, vert.V, hex.VertexIndexClockwise(vert.K)}
}
return adjVerts
}
func (vc Vertex) Clockwise() Vertex {
return Vertex{vc.U, vc.V, hex.VertexIndexClockwise(vc.K)}
}