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Tracking
TrkFitter
TrkGaussianSumFilterUtils
TrkGaussianSumFilterUtils
GsfConstants.h
Go to the documentation of this file.
1
/*
2
Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
3
*/
4
10
#ifndef GSFCONSTANTS_H
11
#define GSFCONSTANTS_H
12
13
#include <cstddef>
14
#include <cstdint>
15
namespace
GSFConstants
{
16
45
constexpr int8_t
maxNumberofStateComponents
= 12;
50
constexpr int8_t
maxNumberofMatComponents
= 6;
54
constexpr int8_t
polynomialCoefficients
= 6;
55
61
constexpr int8_t
maxComponentsAfterConvolution
=
62
maxNumberofMatComponents
*
maxNumberofStateComponents
;
63
68
constexpr
size_t
alignment
= 32;
69
}
70
#endif
GSFConstants
Collect constants we use in GSF and their meaning in one place.
Definition:
GsfConstants.h:15
GSFConstants::maxNumberofStateComponents
constexpr int8_t maxNumberofStateComponents
Note the Gaussian sum approach as describe e.g in " Optimal Filtering" Anderson and Moore "Track Fitt...
Definition:
GsfConstants.h:47
GSFConstants::maxNumberofMatComponents
constexpr int8_t maxNumberofMatComponents
Maximum number of Gaussian components for the material effects description.
Definition:
GsfConstants.h:50
GSFConstants::maxComponentsAfterConvolution
constexpr int8_t maxComponentsAfterConvolution
The maximum size State x Bethe-Heitler components The typical number we use is the max 6x12 = 72 i....
Definition:
GsfConstants.h:61
GSFConstants::alignment
constexpr size_t alignment
Alignment used for SIMD operations internally to GSF.
Definition:
GsfConstants.h:68
GSFConstants::polynomialCoefficients
constexpr int8_t polynomialCoefficients
Number of coefficients for the polynomials, parametrizing the mean,variace, weights of the Gaussian c...
Definition:
GsfConstants.h:54
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