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source: svn/trunk/Utilities/HepMC/interface/GenVertex.h@ 491

Last change on this file since 491 was 349, checked in by severine ovyn, 16 years ago

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[349]1//--------------------------------------------------------------------------
2#ifndef HEPMC_GEN_VERTEX_H
3#define HEPMC_GEN_VERTEX_H
4
5//////////////////////////////////////////////////////////////////////////
6// Matt.Dobbs@Cern.CH, September 1999, refer to:
7// M. Dobbs and J.B. Hansen, "The HepMC C++ Monte Carlo Event Record for
8// High Energy Physics", Computer Physics Communications (to be published).
9//
10// GenVertex within an event
11// A vertex is indirectly (via particle "edges") linked to other
12// vertices ("nodes") to form a composite "graph"
13//////////////////////////////////////////////////////////////////////////
14
15// --> HANDLE COMPILER INCONSISTENCIES
16// This pre-compiler directive is included (2002-01-16) to allow compatibility
17// with several compilers.
18// Mar 27, 2004: HepMC is now standard compliant only.
19// I've removed forward_iterator, and it will no longer compile on gcc < 3.
20#ifdef __SUNPRO_CC // Solaris CC 5.2
21#define NEED_SOLARIS_FRIEND_FEATURE
22#endif // Platform
23
24#include "WeightContainer.h"
25#include "SimpleVector.h"
26#include <iostream>
27#include <iterator>
28#include <vector>
29#include <set>
30#include <algorithm>
31
32namespace HepMC {
33
34 /// type of iteration
35 enum IteratorRange { parents, children, family,
36 ancestors, descendants, relatives };
37 class GenParticle;
38 class GenEvent;
39
40 //! GenVertex contains information about decay vertices.
41
42 ///
43 /// \class GenVertex
44 /// HepMC::GenVertex contains the position in space and time of a decay.
45 /// It also contains lists of incoming and outgoing particles.
46 ///
47 class GenVertex {
48
49 /// print vertex information
50 friend std::ostream& operator<<( std::ostream&, const GenVertex& );
51 friend class GenEvent;
52
53#ifdef NEED_SOLARIS_FRIEND_FEATURE
54 // This bit of ugly code is only for CC-5.2 compiler.
55 // M.Dobbs 2002/02/19
56 // It is not needed by linux gcc, nor Windows Visual C++.
57 public:
58 class vertex_iterator;
59 friend class vertex_iterator;
60 class particle_iterator;
61 friend class particle_iterator;
62#endif // NEED_SOLARIS_FRIEND_FEATURE
63
64 public:
65 /// default constructor
66 GenVertex( const FourVector& position =FourVector(0,0,0,0),
67 int id = 0,
68 const WeightContainer& weights = std::vector<double>() );
69 GenVertex( const GenVertex& invertex ); //!< shallow copy
70 virtual ~GenVertex();
71
72 void swap( GenVertex & other); //!< swap
73 GenVertex& operator= ( const GenVertex& invertex ); //!< shallow
74 bool operator==( const GenVertex& a ) const; //!< equality
75 bool operator!=( const GenVertex& a ) const; //!< inequality
76 void print( std::ostream& ostr = std::cout ) const; //!< print vertex information
77
78 double check_momentum_conservation() const;//!< |Sum (mom_in-mom_out)|
79
80 /// add incoming particle
81 void add_particle_in( GenParticle* inparticle );
82 /// add outgoing particle
83 void add_particle_out( GenParticle* outparticle );
84 /// remove_particle finds *particle in the in and/or out list and
85 /// removes it from these lists ... it DOES NOT DELETE THE PARTICLE
86 /// or its relations. You could delete the particle too as follows:
87 /// delete vtx->remove_particle( particle );
88 GenParticle* remove_particle( GenParticle* particle ); //!< remove a particle
89
90 operator HepMC::FourVector() const; //!< conversion operator
91 operator HepMC::ThreeVector() const; //!< conversion operator
92
93 ////////////////////
94 // access methods //
95 ////////////////////
96
97 /// pointer to the event that owns this vertex
98 GenEvent* parent_event() const;
99 /// vertex position
100 ThreeVector point3d() const;
101 /// vertex position and time
102 const FourVector & position() const;
103 /// set vertex position and time
104 void set_position( const FourVector& position = FourVector(0,0,0,0) );
105 /// we don't define what you use the id for -- but we imagine,
106 /// for example it might code the meaning of the weights()
107 int id() const; //!< vertex ID
108 void set_id( int id ); //!< set vertex ID
109
110 ///
111 /// The barcode is the vertex's reference number, every vertex in the
112 /// event has a unique barcode. Vertex barcodes are negative numbers,
113 /// particle barcodes are positive numbers.
114 int barcode() const; //!< unique identifier
115
116 /// In general there is no reason to "suggest_barcode"
117 bool suggest_barcode( int the_bar_code );
118
119 /// direct access to the weights container is allowed.
120 WeightContainer& weights();
121 /// const direct access to the weights container
122 const WeightContainer& weights() const;
123
124 ////////////////////
125 // Iterators // users should use prefer to use particle_iterator
126 ////////////////////
127
128 /// const iterator for incoming particles
129 typedef std::vector<HepMC::GenParticle*>::const_iterator
130 particles_in_const_iterator;
131 /// const iterator for outgoing particles
132 typedef std::vector<HepMC::GenParticle*>::const_iterator
133 particles_out_const_iterator;
134 /// begin iteration of incoming particles
135 particles_in_const_iterator particles_in_const_begin() const;
136 /// end iteration of incoming particles
137 particles_in_const_iterator particles_in_const_end() const;
138 /// begin iteration of outgoing particles
139 particles_out_const_iterator particles_out_const_begin() const;
140 /// end iteration of outgoing particles
141 particles_out_const_iterator particles_out_const_end() const;
142 /// number of incoming particles
143 int particles_in_size() const;
144 /// number of outgoing particles
145 int particles_out_size() const;
146
147 protected:
148 //static unsigned int counter(); //!< temporary for debugging
149
150 /// only the GenEvent (friend) is allowed to set the parent_event,
151 /// and barcode. It is done automatically anytime you add a
152 /// vertex to an event
153 void set_parent_event_( GenEvent* evt ); //!< set parent event
154 void set_barcode_( int the_bar_code ); //!< set identifier
155 void change_parent_event_( GenEvent* evt ); //!< for use with swap
156
157 /////////////////////////////
158 // edge_iterator // (protected - for internal use only)
159 /////////////////////////////
160 // If the user wants the functionality of the edge_iterator, he should
161 // use particle_iterator with IteratorRange = family, parents, children
162 //
163
164 //! edge iterator
165
166 /// \class edge_iterator
167 /// iterate over the family of edges connected to m_vertex begins
168 /// with parents (incoming particles) then children (outgoing)
169 /// This is not a recursive iterator ... it is a building block
170 /// for the public iterators and is intended for internal use only.
171 /// The acceptable Iterator Ranges are: family, parents, children
172 class edge_iterator :
173 public std::iterator<std::forward_iterator_tag,HepMC::GenParticle*,ptrdiff_t>{
174 public:
175 edge_iterator();
176 /// used to set limits on the iteration
177 edge_iterator( const GenVertex& vtx, IteratorRange range =family );
178 /// copy
179 edge_iterator( const edge_iterator& p );
180 virtual ~edge_iterator();
181 /// make a copy
182 edge_iterator& operator=( const edge_iterator& p );
183 /// return a pointer to a particle
184 GenParticle* operator*(void) const;
185 /// Pre-fix increment
186 edge_iterator& operator++(void); // Pre-fix increment
187 /// Post-fix increment
188 edge_iterator operator++(int); // Post-fix increment
189 /// equality
190 bool operator==( const edge_iterator& a ) const;
191 /// inequality
192 bool operator!=( const edge_iterator& a ) const;
193 /// true if parent of root vtx
194 bool is_parent() const;
195 /// true if child of root vtx
196 bool is_child() const;
197 /// root vertex of this iteration
198 const GenVertex* vertex_root() const;
199 private:
200 const GenVertex* m_vertex;
201 IteratorRange m_range;
202 std::vector<HepMC::GenParticle*>::const_iterator m_set_iter;
203 bool m_is_inparticle_iter;
204 bool m_is_past_end;
205 };
206 friend class edge_iterator;
207 /// size
208 int edges_size( IteratorRange range = family ) const;
209 /// begin range
210 edge_iterator edges_begin( IteratorRange range = family) const;
211 /// end range
212 edge_iterator edges_end( IteratorRange /* dummy_range */ ) const;
213
214 public:
215 ///////////////////////////////
216 // vertex_iterator //
217 ///////////////////////////////
218
219 //! vertex iterator
220
221 /// \class vertex_iterator
222 /// Iterates over all vertices connected via a graph to this vertex.
223 /// this is made friend to that it can access protected edge
224 /// iterator the range can be IteratorRange= ( parents, children,
225 /// family, ancestors, descendants, relatives )
226 /// example for range=descendants the iterator
227 /// will return all vertices
228 /// which are children (connected by an outgoing particle edge),
229 /// grandchildren, great-grandchildren, etc. of this vertex
230 /// In all cases the iterator always returns this vertex
231 /// (returned last).
232 /// The algorithm is accomplished by converting the graph to a tree
233 /// (by "chopping" the edges connecting to an already visited
234 /// vertex) and returning the vertices in POST ORDER traversal.
235 ///
236 class vertex_iterator :
237 public std::iterator<std::forward_iterator_tag,HepMC::GenVertex*,ptrdiff_t>{
238 public:
239 vertex_iterator();
240 /// used to set limits on the iteration
241 vertex_iterator( GenVertex& vtx_root, IteratorRange range );
242 /// next constructor is intended for internal use only
243 vertex_iterator( GenVertex& vtx_root, IteratorRange range,
244 std::set<const HepMC::GenVertex*>& visited_vertices );
245 /// copy
246 vertex_iterator( const vertex_iterator& v_iter );
247 virtual ~vertex_iterator();
248 /// make a copy
249 vertex_iterator& operator=( const vertex_iterator& );
250 /// return a pointer to a vertex
251 GenVertex* operator*(void) const;
252 /// Pre-fix increment
253 vertex_iterator& operator++(void); //Pre-fix increment
254 /// Post-fix increment
255 vertex_iterator operator++(int); //Post-fix increment
256 /// equality
257 bool operator==( const vertex_iterator& ) const;
258 /// inequality
259 bool operator!=( const vertex_iterator& ) const;
260 /// vertex that this iterator begins from
261 GenVertex* vertex_root() const;
262 /// iterator range
263 IteratorRange range() const;
264 /// intended for internal use only.
265 void copy_with_own_set( const vertex_iterator&
266 v_iter,
267 std::set<const HepMC::GenVertex*>&
268 visited_vertices );
269
270 protected: // intended for internal use only
271 /// non-null if recursive iter. created
272 GenVertex* follow_edge_();
273 /// copy recursive iterator
274 void copy_recursive_iterator_( const vertex_iterator*
275 recursive_v_iter );
276 private:
277 GenVertex* m_vertex; // the vertex associated to this iter
278 IteratorRange m_range;
279 std::set<const HepMC::GenVertex*>* m_visited_vertices;
280 bool m_it_owns_set; // true if it is responsible for
281 // deleting the visited vertex set
282 edge_iterator m_edge; // particle edge pointing to return vtx
283 vertex_iterator* m_recursive_iterator;
284 };
285 friend class vertex_iterator;
286 /// begin vertex range
287 vertex_iterator vertices_begin( IteratorRange range = relatives );
288 /// end vertex range
289 vertex_iterator vertices_end( IteratorRange /* dummy_range */ );
290
291 public:
292 ///////////////////////////////
293 // particle_iterator //
294 ///////////////////////////////
295
296 //! particle iterator
297
298 /// \class particle_iterator
299 /// Iterates over all particles connected via a graph.
300 /// by iterating through all vertices in the m_range. For each
301 /// vertex it returns orphaned parent particles
302 /// (i.e. parents without production vertices)
303 /// then children ... in this way each particle is associated
304 /// to exactly one vertex and so it is returned exactly once.
305 /// Is made friend so that it can access protected edge iterator
306 class particle_iterator :
307 public std::iterator<std::forward_iterator_tag,GenParticle*,ptrdiff_t>{
308 public:
309 particle_iterator();
310 /// used to set limits on the iteration
311 particle_iterator( GenVertex& vertex_root, IteratorRange range );
312 /// copy
313 particle_iterator( const particle_iterator& );
314 virtual ~particle_iterator();
315 /// make a copy
316 particle_iterator& operator=( const particle_iterator& );
317 /// return a pointer to a particle
318 GenParticle* operator*(void) const;
319 /// Pre-fix increment
320 particle_iterator& operator++(void);
321 /// Post-fix increment
322 particle_iterator operator++(int);
323 /// equality
324 bool operator==( const particle_iterator& ) const;
325 /// inequality
326 bool operator!=( const particle_iterator& ) const;
327 protected:
328 GenParticle* advance_to_first_(); //!< "first" particle
329 private:
330 vertex_iterator m_vertex_iterator;
331 edge_iterator m_edge; // points to the return
332 };
333 friend class particle_iterator;
334 /// begin particle range
335 particle_iterator particles_begin( IteratorRange range
336 = relatives );
337 /// end particle range
338 particle_iterator particles_end( IteratorRange
339 /* dummy_range */ );
340
341 ////////////////////////////////////////////////
342 protected:
343 /// for internal use only
344 void delete_adopted_particles();
345 /// for internal use only - remove particle from incoming list
346 void remove_particle_in( GenParticle* );
347 /// for internal use only - remove particle from outgoing list
348 void remove_particle_out( GenParticle* );
349 /// scale the position vector
350 /// this method is only for use by GenEvent
351 void convert_position( const double& );
352
353 private: // GenVertex data members
354 FourVector m_position; //4-vec of vertex [mm]
355 std::vector<HepMC::GenParticle*> m_particles_in; //all incoming particles
356 std::vector<HepMC::GenParticle*> m_particles_out; //all outgoing particles
357 int m_id;
358 WeightContainer m_weights; // weights for this vtx
359 GenEvent* m_event;
360 int m_barcode; // unique identifier in the event
361
362 //static unsigned int s_counter;
363 };
364
365 ////////////////////////////
366 // INLINES access methods //
367 ////////////////////////////
368
369 inline GenVertex::operator HepMC::FourVector() const { return position(); }
370
371 inline GenVertex::operator HepMC::ThreeVector() const { return point3d(); }
372
373 inline const FourVector & GenVertex::position() const { return m_position; }
374
375 inline GenEvent* GenVertex::parent_event() const { return m_event; }
376
377 inline ThreeVector GenVertex::point3d() const {
378 return ThreeVector(m_position.x(),m_position.y(),m_position.z());
379 }
380
381 inline int GenVertex::id() const { return m_id; }
382
383 inline int GenVertex::barcode() const { return m_barcode; }
384 inline void GenVertex::set_barcode_( int bc ) { m_barcode = bc; }
385
386 inline WeightContainer& GenVertex::weights() { return m_weights; }
387
388 inline const WeightContainer& GenVertex::weights() const
389 { return m_weights; }
390
391 inline void GenVertex::set_position( const FourVector& position ) {
392 m_position = position;
393 }
394
395 inline void GenVertex::set_id( int id ) { m_id = id; }
396
397 //////////////
398 // INLINES //
399 //////////////
400
401 inline GenVertex::particles_in_const_iterator
402 GenVertex::particles_in_const_begin() const {
403 return m_particles_in.begin();
404 }
405
406 inline GenVertex::particles_in_const_iterator
407 GenVertex::particles_in_const_end() const {
408 return m_particles_in.end();
409 }
410
411 inline GenVertex::particles_out_const_iterator
412 GenVertex::particles_out_const_begin() const {
413 return m_particles_out.begin();
414 }
415
416 inline GenVertex::particles_out_const_iterator
417 GenVertex::particles_out_const_end() const {
418 return m_particles_out.end();
419 }
420
421 inline int GenVertex::particles_in_size() const {
422 return m_particles_in.size();
423 }
424
425 inline int GenVertex::particles_out_size() const {
426 return m_particles_out.size();
427 }
428
429 inline bool GenVertex::edge_iterator::operator==(
430 const edge_iterator& a ) const {
431 return **this == *a;
432 }
433
434 inline bool GenVertex::edge_iterator::operator!=(
435 const edge_iterator& a ) const {
436 return !(**this == *a);
437 }
438
439 inline const GenVertex* GenVertex::edge_iterator::vertex_root() const {
440 return m_vertex;
441 }
442
443 inline GenVertex::edge_iterator GenVertex::edges_begin( IteratorRange
444 range ) const {
445 return GenVertex::edge_iterator(*this, range);
446 }
447
448 inline GenVertex::edge_iterator GenVertex::edges_end( IteratorRange
449 /* dummy_range */ ) const {
450 return GenVertex::edge_iterator();
451 }
452
453 inline bool GenVertex::vertex_iterator::operator==(
454 const vertex_iterator& a ) const {
455 return **this == *a;
456 }
457
458 inline bool GenVertex::vertex_iterator::operator!=(
459 const vertex_iterator& a ) const {
460 return !(**this == *a);
461 }
462
463 inline GenVertex* GenVertex::vertex_iterator::vertex_root() const {
464 return m_vertex;
465 }
466
467 inline IteratorRange GenVertex::vertex_iterator::range() const {
468 return m_range;
469 }
470
471 inline GenVertex::vertex_iterator GenVertex::vertices_begin(
472 IteratorRange range ){
473 // this is not const because the it could return itself
474 return vertex_iterator( *this, range );
475 }
476
477 inline GenVertex::vertex_iterator GenVertex::vertices_end(
478 IteratorRange /* dummy_range */ ) {
479 return vertex_iterator();
480 }
481
482 inline bool GenVertex::particle_iterator::operator==(
483 const particle_iterator& a ) const {
484 return **this == *a;
485 }
486
487 inline bool GenVertex::particle_iterator::operator!=(
488 const particle_iterator& a ) const {
489 return !(**this == *a);
490 }
491
492 inline GenVertex::particle_iterator GenVertex::particles_begin(
493 IteratorRange range ) {
494 return particle_iterator( *this, range );
495 }
496
497 inline GenVertex::particle_iterator GenVertex::particles_end(
498 IteratorRange /* dummy_range */ ){
499 return particle_iterator();
500 }
501
502} // HepMC
503
504#endif // HEPMC_GEN_VERTEX_H
505//--------------------------------------------------------------------------
506
507
508
509
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