ZOOM ZOOM

May 24, 2000: The following were removed from the CLHEP web page:

• ZOOM-supplied Extensions
  (In no case do these extensions modify or eliminate existing correct functionality.
  Changes (fed back to CLHEP) are discussed here.
  • Additional Methods
    • Support for instantiating large collections of generators without getting identical sequences.
    • Saving and restoring engine state to file with user-supplied name.
    • Engine state stream output via << and input via >> .
    • Distributions have a form of constructor that accepts a set a parameters to use as defaults for that distribution instance, when fire() is done without supplying parameters.
    In addition, we have a standard natural way to capture the state of a generator.
  • Alternate Distribution Classes
    The above additional methods do not apply to the distribution classes in the original CLHEP Random package. Analgous alternate classes are provided. There is a discussion on the Random Validation Page of the reason for these alternative classes, and a proposal to re-unify them.
  • New Distributions
    

    All seven distributions in table 16.1 of the Review of Particle Properties.

  • Additional Random Engines

    DualRand

    From a generator used extensively in Lattice Gauge Theory Monte Carlos.

    Ranshi

    From a generator based on simulating a large collection of spinning balls.

  • Corrections
    Several minor changes were made in the behavior of these classes, to conform to either the clearly intended behavior, or to normal C++ semantics.

• Extensions and Validations still in progress
  • Distributions
    The package will include
    • Vavilov distribution, an approximation-free version of the Landau distribution.
    • Spin-1/2 corrected Vavilov distribution.
  • Additional Random Engines
    • Ranlux64
    • RanX3, a generator combining DualRand with a method due to Hurd involving non-trivial primitive polynomials.
  • Further Methods
    • Default constructors for each distribution class, with appropriate semantics.
    • Copy constructors and assignment operators for each distribution class, with appropriate semantics.

June 19, 1998:

• Random sub-package extensions have been done:
  • Set of distributions expanded to include all those in Review of Particles and Fields.
  • Two additional rnaom engines: Ranshi and DualRand.
  • Enhanced set of methods for working with distributions and engines.
  (Further extensions and enhancements will be forthcoming.)

Apr. 9, 1998:

• Random sub-package validation has been done. (Further extensions and enhancements will be forthcoming.)

Jan. 22, 1998:

• Random sub-package validation work has commenced. John Marraffino is spearheading this.

Nov. 21, 1997:

• The ZOOM CLHEP product, a common version of CLHEP 1.0, has been released.
  • It is available via the usual ZOOM distribution mechanisms, under the package name CLHEP.
  • Each package is merely "PRESENT" -- that is, they compile under the ZOOM supported platforms but none have been VALIDATED.