Table of Contents

The Geant-4 Geometry Navigator

Overview

What the geometry does ...

Types of Volumes

Physical Volumes

Navigation

Navigation and boundaries

Volume Intersection Optimisation

Performance of pure geometry

Performance: CERNSP/Power-2

Recent developments (1997)

What is the need for Touchables?

What can a touchable do ?

What does it cost?

Benefits of Touchables in track

Future developments

Summary

Email: John.Apostolakis@cern.ch