Convex-hull algorithms: Implementation, testing, and experimentation

Ask Neve Gamby, Jyrki Katajainen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

424 Downloads (Pure)


From a broad perspective, we study issues related to implementation, testing, and experimentation in the context of geometric algorithms. Our focus is on the effect of quality of implementation on experimental results. More concisely, we study algorithms that compute convex hulls for a multiset of points in the plane. We introduce several improvements to the implementations of the studied algorithms: PLANE-SWEEP, TORCH, QUICKHULL, and THROW-AWAY. With a new set of space-efficient implementations, the experimental results-in the integer-arithmetic setting-are different from those of earlier studies. From this, we conclude that utmost care is needed when doing experiments and when trying to draw solid conclusions upon them.

Original languageEnglish
Article number195
Issue number12
Number of pages27
Publication statusPublished - 1 Dec 2018


  • Algorithm
  • Algorithm engineering
  • Computational geometry
  • Convex hull
  • Experimentation
  • Implementation
  • Performance
  • Rectilinear convex hull
  • Robustness
  • Testing

Fingerprint Dive into the research topics of 'Convex-hull algorithms: Implementation, testing, and experimentation'. Together they form a unique fingerprint.

Cite this