index

type ArrayVisitor struct {
	Items []interface{}
}

type ItemVisitor interface {
	// VisitItem Visits an item in the index.
	VisitItem(item interface{})
}

type LineSegmentVisitor struct {

	// LineSegmentVisitor ItemVisitor subclass to reduce volume of query results.
	QuerySeg *matrix.LineSegment
	Items    []*matrix.LineSegment
}

type SpatialIndex interface {
	// Insert Adds a spatial item with an extent specified by the given Envelope to the index
	Insert(itemEnv *envelope.Envelope, item interface{})

	// Query Queries the index for all items whose extents intersect the given search  Envelope
	// Note that some kinds of indexes may also return objects which do not in fact
	//  intersect the query envelope.
	Query(searchEnv *envelope.Envelope) []interface{}
	// QueryVisitor Queries the index for all items whose extents intersect the given search Envelope,
	// and applies an  ItemVisitor to them.
	// Note that some kinds of indexes may also return objects which do not in fact
	// intersect the query envelope.
	QueryVisitor(searchEnv *envelope.Envelope, visitor *ItemVisitor)

	// Remove Removes a single item from the tree.
	Remove(itemEnv *envelope.Envelope, item interface{})
}