TY - JOUR
T1 - Hinted quad trees for VLSI geometry DRC based on efficient searching for neighbors
AU - Lai, Glenn G.
AU - Fussell, Donald S.
AU - Wong, D. F.
N1 - Publisher Copyright:
© 1996 IEEE
PY - 1996/3
Y1 - 1996/3
N2 - Design-rule checking, whose efficiency depends greatly on the speed in finding an object's neighbors, is an indispensable component of any VLSI design process. Given a design, the objects it contains are usually represented by their smallest enclosing rectangles, and neighbor search is defined as the operation to find, among the collection of rectangles, the ones that are within the specified distance of a rectangle. Commonly, the rectangles are stored in a tree structure, and a region query that searches the tree starting at its root is used to find a rectangle's neighbors. In this paper, we introduce the hinted quad tree, or HQT, that supports neighbor searches directly without always starting a search at the root of the tree. We show that HQT achieves the highest neighbor-search performance among the data structures compared and uses a reasonable amount of storage.
AB - Design-rule checking, whose efficiency depends greatly on the speed in finding an object's neighbors, is an indispensable component of any VLSI design process. Given a design, the objects it contains are usually represented by their smallest enclosing rectangles, and neighbor search is defined as the operation to find, among the collection of rectangles, the ones that are within the specified distance of a rectangle. Commonly, the rectangles are stored in a tree structure, and a region query that searches the tree starting at its root is used to find a rectangle's neighbors. In this paper, we introduce the hinted quad tree, or HQT, that supports neighbor searches directly without always starting a search at the root of the tree. We show that HQT achieves the highest neighbor-search performance among the data structures compared and uses a reasonable amount of storage.
UR - http://www.scopus.com/inward/record.url?scp=0030104875&partnerID=8YFLogxK
U2 - 10.1109/43.489102
DO - 10.1109/43.489102
M3 - Journal article
AN - SCOPUS:0030104875
SN - 0278-0070
VL - 15
SP - 317
EP - 324
JO - IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
JF - IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
IS - 3
ER -