HepJamesRandom

RanluxEngine

• Algorithm originally implemented in F77 by
  Fred James, part of MathLib HEP library.
• It provides 5 different luxury levels (default=3).

RandEngine

• Uses rand() and srand() functions from C Standard Library.

DRand48Engine

• Uses drand48() and srand48() functions from C Standard Library

Engine

The real algorithm for generation of pseudo random

values. Generates values in the interval [0,1[.
(HepJamesRandom, RanecuEngine, RanluxEngine,
RandEngine, DRand48Engine)

Distribution

Set of methods to generate random values

according to a specific distribution. (RandFlat, RandGauss,
RandExponential, RandPoisson, RandBreitWigner)

Generator

A Distribution associated to an Engine

Introduction

Design overview

Engine Classes description

Distribution Classes description

Examples

Persistency switch using a preprocessor flag

• Proposed in this month

“Run” and “Event” persistent test program

• Prepared before Christmas

“Developer’s” example for persistency

• Prepared by middle of Feb. 98

Persistent examples and analysis templates will be addressed to the “Official” example

“Run Persistency”

• Run conditions
• Geometries ----> Postponed
• Physics process conditions ----> Postponed

“Event Persistency”

• Primary event
• Trajectories
• Hits
• Digitizations