The TrkSurfaces package

Package for surface descriptions in the Tracking package.

Author

Andre.nosp@m.as.S.nosp@m.alzbu.nosp@m.rger.nosp@m.@cern.nosp@m..ch

Introduction

The different Trk::Surface types define the track parameterisations available.

Trk::ConeSurface	Conical Surface, ownes/defined by Trk::ConeBounds
Trk::CylinderSurface	Cylindrical Surface, ownes/defined by Trk::CylinderBounds
Trk::DiscSurface	Surface describing a disc, ownes/defined by Trk::DiscBounds

Trk::PerigeeSurface

Surface for Perigee representation, placeholder for IP point, the orientation is fixed to be aligned along the tracking z-Axis.

Trk::PlaneSurface

Planar Surface representation, can either have Trk::RectanguleBounds, Trk::TrapezoidBounds, Trk::RotatedTrapezoidBounds, Trk::DiamondBounds and Trk::EllipseBounds

Trk::StraightLineSurface

Surface for straight line representation, differently to the Trk::PerigeeSurface it can be oriented arbitrarily

Usage of 3 and 2-dim objects

In this package the following classes for 3 dimensional and 2 dimensional points of vectors are used from the GeoPrimitives package

• Amg::Vector3D for 3D points and vectors
• Amg::Vector2D for 2D points on a surface or the special local direction