ZOOM CLHEP Vector Package Release Notes

5/14/04

CLHEP v1.9.9; cvs rtag V01-09-09

Fix some misbehavior in rapidity()
The rapidity() member function was misbehaving in the special case of a light-like particle moving along the -z axis. This has been fixed.

1/31/04

CLHEP v1.9.6, cvs rtag V01-09-06

Vector
Use standard library exceptions when ZMthrowA would otherwise abort.

9/15/03

CLHEP v1.9.3, cvs rtag V01-09-03

Vector
Supply several previously ommitted methods such as RotationX * LorentzRotation
Repair a bug in LorentzVector::deltaR() which could return large values when the phi values are close to +/- pi.
Correct a typo in Boost::vectorMutiplication().
This affected off-axis boosts applied to a LorentzVector when the x- and/or y- components of both the Boost and the LorentzVector are not small. Boosts in the z-direction are unaffected and Boosts dominantly in the z-direction suffered only second-order effects.
Rectify misbehaviour when isNear() is taken between a specialized or general Boost and a general LorentzRotation.
Update the Formulas and Definitions document.
Define the ranges of phi and psi for Euler angles and give the definition of the dictionary ordering comparison of Rotations.
Update the accompanying tests including those which had been part of PhysicsVectors.

4/4/03

CLHEP v1.8.3, cvs rtag V01-08-03

In Vector package:
Put PhysicsVectors tbins into working condition:
Rotation classes to work with more specializations
added operator << for LoretzTransformation and Rotation

7/24/02

CLHEP v1.8, cvs rtag V01-08-00

In Vector package:
Fix acos range problem
Various Rotation routines need to take acos of a quantity built from the rotation components, which due to roundoff was slightly greater than 1. A safe version of acos was substituted.
Bring up to date with respect to CLHEP changes
Accomodations for platforms not in use at FNAL.

4/23/02

CLHEP v1.7.12, cvs rtag V01-07-12

In Vector package:
Inline all the Rotation*Vector and Rotation*Rotation operations
This changes was made to bring the speed of the Vector package back up to that of CLHEP 1.6. For example, Rotation*vector is now 3.5 times faster than it had been in CLHEP 1.7.
Remove virtuallity of specialized Rotations. (e.g., RotationX)
Necessary to effectively perform the above optimization.
Inline multiplication for, and remove virtuallity of:
HepLorentzRotation, HepBoost, HepBoostX, HepBoostY, and HepBoostZ

Significantly reduce the role of Hep3RotationInterface and Hep4RotationInterface classes.
Repair a missing include in two test programs.

11/29/01

CLHEP v1.7.6, cvs rtag V01-07-06

In Vector package:
deltaR() more sensible for vectors near phi = - PI:
Corrected a poorly conceived behavior when phi of the two Hep3Vectors or HepLorentzVectors are on opposite sides of the negative Y axis. In that case, the deltaPhi used should be small, not almost 2 PI. Now deltaR() uses deltaPhi() whichis always in the range (-PI,PI].
New method v1.deltaPhi(v2)
v1.phi() - v2.phi(), normalized to the range (-PI,PI]. deltaR() and azimAngle() now make use of deltaPhi().
azimAngle() always in range (-PI,PI]
The non-reference-vector form of azimAngle() had merely been taking the differnce in phi, sithout normalizing to (-PI,PI].
polarAngle() now always returns a positive theta.
The documentation implied that the polar angle between two vectors is always in [0,PI) and this is now the case.
Fix bug in isNear() for EulerAngles
The bug had in some cases caused EulerAngles to appear to be much farther apart than was really the case.
eta(Hep3Vector(0,0,0)) returns 0
The ill-defined concept of pseudorapidity of a zero vector now returns 0 rather than a large positive number.
Input operator>>accepts same format as output operator<<
For AxisAngle and EulerAngles and Hep2Vector, the result of reading in the characters ouput by operator<< will now be the same object, within the precision originally output. This is accomplished by providing more flexible input acceptance; the forms previously accepted will still be accepted.
Hep3Vector now also uses this flexible form of input, and thus can be input as either
x y z
or
(x, y, z)

set(x,y) method for Hep2Vector
This method is provided for completeness.
Fix pedantic compiler warnings
Mostly these have to do with constructors for HepRotation, which now explicitly initialize the base Hep3Rotation class. Similarly, constructors for HepLorentzRotation and related classes explicitly initialize the base Hep4Rotation class.

8/28/01

CLHEP v1.7, cvs rtag V01-07-00

In Vector package:
• Improved Error Message:
  Corrected a confusing error message given when constructing a boost providing zero as the direction.
• Production status:
  The Vector subpackage is now declared to be in production.
  See the related PhysicsVectors package for FeatureLog and ProblemTracking.

4/17/01

CLHEP v1.6.3, cvs rtag V01-06-03

Polishing in Vector package:
• `NaN-proofing':
  No methods will silently produce infinities or NaN's.
  Every place which could potentially (due to peculiar argument values, roundoff, or other reasons) generate a NaN or infinity, or call system methods such as log or acos with an invalid argument, will first ZMthrow.
  Only if the user has caused this ZMthrow to be ignored will the program continue, having produced a NaN or infinity.
• Repaired code in Boost::rectify() which would have produced a spurious warning message.
• Removed a typo in the Formulas and Definitions document, in the definition of howParallel for HepLorentzVector.

4/4/01

CLHEP v1.6.2, cvs rtag V01-06-02

Synchronize with current contents of CERN cvs repository
• Use of HepStd where appropriate
In AxisAngle and EulerAngles, distance() is non-virtual
Implemented HepRotation::operator=(Hep3RotationInterface)

1/22/01

CLHEP v1.6.1, cvs rtag V01-06-01

Merge of Vector with ZOOM PhysicsVectors package
• All existing CLHEP capabilities and syntaxes preserved.
• All capabiliites available in ZOOM PhysicsVectors now available for corresponding CLHEP/Vector classes.
• Separation into multiple .cc files to avoid dragging in excessive unused code.
• See
  • List of key merge issues
  • Formulas and Definitions document
Dependencies:
The ZOOM version of CLHEP depends on Exceptions (v1.3 or higher)

5/16/00

CLHEP v1.5, cvs rtag V01-05-00

New Features in release:
Matches the official CLHEP 1.5.
Fix of a technique in RotateUz that was leading to poor numerical accuracy

3/14/00

CLHEP v1.3.20, cvs rtag V01-03-20

Minor tweaks to avoid warnings:
• Two Vector classes needed changing to avoid (valid) warnings found by compilations with optimization turned on.

10/23/98

CLHEP v1.3.2, cvs rtag V01-03-02

This is a fermi maintenance release of CLHEP v1.3
Minor clean-up of HepMatrix and HepVector.

Parent Pages: