2 ///////////////////////////////////////////////////////////////////////////////
4 // Description: header file for generic parameters definitions //
5 // This file is part of the SISCone project. //
6 // For more details, see http://projects.hepforge.org/siscone //
8 // Copyright (c) 2006 Gavin Salam and Gregory Soyez //
10 // This program is free software; you can redistribute it and/or modify //
11 // it under the terms of the GNU General Public License as published by //
12 // the Free Software Foundation; either version 2 of the License, or //
13 // (at your option) any later version. //
15 // This program is distributed in the hope that it will be useful, //
16 // but WITHOUT ANY WARRANTY; without even the implied warranty of //
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
18 // GNU General Public License for more details. //
20 // You should have received a copy of the GNU General Public License //
21 // along with this program; if not, write to the Free Software //
22 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA //
24 // $Revision:: 225 $//
25 // $Date:: 2008-05-20 16:59:47 +0200 (Tue, 20 May 2008) $//
26 ///////////////////////////////////////////////////////////////////////////////
33 // we get "SISCone" by calling
34 // siscone::siscone_package_name
35 // defined in siscone.h
36 // Otherwise, config.h
37 // It is also defined as "PACKAGE_NAME" in config.h but this method
38 // might lead to conflicts
39 //#define PROGRAM PACKAGE_NAME
43 // siscone::siscone_version
44 // defined in siscone.h
45 // It is also defined as "VERSION" in config.h but this method
46 // might lead to conflicts
48 /// perform final stability check using the quadtree
49 /// With the following define enabled, the final check for stability
50 /// is performed using the quadtree rather than the explicit list of
51 /// particles (see Cstable_cone::proceed_with_stability())
52 //#define USE_QUADTREE_FOR_STABILITY_TEST
55 /// threshold for recomoutation of the cone (see Cstable_cones::update_cone())
56 /// When traversing cone candidates along the angular ordering,
57 /// the momentum of the protojet candidate is computed incrementally
58 /// from the particles that enter and leave the cone.
59 /// When the cumulative change in "|px|+|py|" exceeds the cone "|px|+|py|"
60 /// we explicitely recompute the cone contents
61 #define PT_TSHOLD 1000.0
64 /// The following parameter controls collinear safety. For the set of
65 /// particles used in the search of stable cones, we gather particles
66 /// if their distance in eta and phi is smaller than EPSILON_COLLINEAR.
68 /// NB: for things to behave sensibly one requires
69 /// 1e-15 << EPSILON_COCIRCULAR << EPSILON_COLLINEAR << 1
71 /// among the scales that appear in practice (e.g. in deciding to use
72 /// special strategies), we have EPSILON_COLLINEAR, EPSILON_COCIRCULAR,
73 /// sqrt(EPSILON_COCIRCULAR) and EPSILON_COLLINEAR / EPSILON_COCIRCULAR.
75 #define EPSILON_COLLINEAR 1e-8
78 /// The following parameter controls cocircular situations.
79 /// When consecutive particles in the ordered vicinity list are separated
80 /// (in angle) by less that that limit, we consider that we face a situation
82 #define EPSILON_COCIRCULAR 1e-12
85 /// The following define enables you to allow for identical protocones
86 /// to be merged automatically after each split-merge step before
87 /// anything else happens. Whether this happens depends on teh value
88 /// of the merge_identical_protocones flag in Csplit_merge.
90 /// It we allow such a merging and define allow
91 /// MERGE_IDENTICAL_PROTOCONES_DEFAULT_TRUE then the
92 /// 'merge_identical_protocones' flag in Csplit_merge to be set to
93 /// 'true'. It may be manually reset to false in which case the
94 /// merging of identical protocones (protojets) will be turned off.
96 /// Note that this merging identical protocones makes the algorithm
97 /// infrared-unsafe, so it should be disabled except for testing
99 //#define ALLOW_MERGE_IDENTICAL_PROTOCONES
100 //#define MERGE_IDENTICAL_PROTOCONES_DEFAULT_TRUE
103 /// if EPSILON_SPLITMERGE is defined then, during the split-merge
104 /// step, when two jets are found with PTs that are identical to
105 /// within a relative difference of EPSILON_SPLITMERGE they are
106 /// compared element-by-element to see where the differences are, and
107 /// one then uses pt1^2-pt2^2 = (pt1-pt2).(pt1+pt2) as an estimator of
108 /// which is harder. NB: in unfortunate cases, this can take the split
109 /// merge step up to N n * ln N time, though on normal events there
110 /// don't seem to have been any major problems yet.
111 #define EPSILON_SPLITMERGE 1e-12
113 /// definition of 2*M_PI which is useful a bit everyhere!
114 const double twopi = 6.283185307179586476925286766559005768394;
116 /// debugging information
117 //#define DEBUG_STABLE_CONES ///< debug messages in stable cones search
118 //#define DEBUG_SPLIT_MERGE ///< debug messages in split-merge
119 //#define DEBUG ///< all debug messages !
121 // in case all debug massages allowed, allow them in practice !
123 #define DEBUG_STABLE_CONES
124 #define DEBUG_SPLIT_MERGE
127 #endif // __DEFINES_H__