DGtal  0.9.2
testExpander.cpp
1 
30 #include <iostream>
32 #include <sstream>
33 #include "DGtal/base/Common.h"
34 #include "DGtal/kernel/SpaceND.h"
35 #include "DGtal/kernel/domains/DomainPredicate.h"
36 #include "DGtal/kernel/domains/HyperRectDomain.h"
37 #include "DGtal/kernel/sets/DigitalSetSelector.h"
38 #include "DGtal/kernel/sets/DigitalSetConverter.h"
39 #include "DGtal/topology/MetricAdjacency.h"
40 #include "DGtal/topology/DomainMetricAdjacency.h"
41 #include "DGtal/topology/DomainAdjacency.h"
42 #include "DGtal/topology/DigitalTopology.h"
43 #include "DGtal/topology/Object.h"
44 #include "DGtal/graph/Expander.h"
46 
47 using namespace std;
48 using namespace DGtal;
49 
50 #define INBLOCK_TEST(x) \
51  nbok += ( x ) ? 1 : 0; \
52  nb++; \
53  trace.info() << "(" << nbok << "/" << nb << ") " \
54  << #x << std::endl;
55 
56 #define INBLOCK_TEST2(x,y) \
57  nbok += ( x ) ? 1 : 0; \
58  nb++; \
59  trace.info() << "(" << nbok << "/" << nb << ") " \
60  << y << std::endl;
61 
63 // Functions for testing class Expander.
65 
69 bool testExpander()
70 {
71  unsigned int nbok = 0;
72  unsigned int nb = 0;
73 
74  // ------------------------------ Types ------------------------------
75  typedef SpaceND< 3 > Z3;
76  typedef Z3::Point Point;
77  typedef Point::Coordinate Coordinate;
79  typedef Domain::ConstIterator DomainConstIterator;
80 
81  typedef MetricAdjacency< Z3, 1 > MetricAdj6;
82  typedef MetricAdjacency< Z3, 2 > MetricAdj18;
85  // typedef MetricAdjacency< Z3, 1 > Adj6;
86  // typedef MetricAdjacency< Z3, 2 > Adj18;
87 
89 
91  typedef Object<DT6_18, DigitalSet> ObjectType;
92  typedef Expander< ObjectType > ObjectExpander;
93  // ----------------------- Domain, Topology ------------------------------
94  Point p1( -50, -50, -50 );
95  Point p2( 50, 50, 50 );
96  Domain domain( p1, p2 );
97 
98  MetricAdj6 madj6;
99  MetricAdj18 madj18;
100  Adj6 adj6( domain, madj6 );
101  Adj18 adj18( domain, madj18 );
102  // Adj6 adj6;
103  // Adj18 adj18;
104 
105  DT6_18 dt6_18( adj6, adj18, JORDAN_DT );
106  // ------------------------------- Object ------------------------------
107  Coordinate r = 9;
108  double radius = (double) (r+1);
109  Point c( 0, 0 );
110  Point l( r, 0 );
111  DigitalSet ball_set( domain );
112  ostringstream sstr;
113  sstr << "Creating 3D ball( r < " << radius << " ) ...";
114  trace.beginBlock ( sstr.str() );
115  for ( DomainConstIterator it = domain.begin();
116  it != domain.end();
117  ++it )
118  {
119  if ( (*it - c ).norm() < radius )
120  // insertNew is very important for vector container.
121  ball_set.insertNew( *it );
122  }
123  trace.endBlock();
124 
125  trace.beginBlock ( "Testing Object instanciation and smart copy ..." );
126  ObjectType ball( dt6_18, ball_set );
127  ObjectType ball2( ball );
128  INBLOCK_TEST( ball.size() == 4139 );
129  trace.info() << "ball.size() = " << ball.size()
130  << " 4/3*pi*r^3 = " << ( 4.0*M_PI*radius*radius*radius/3.0 )
131  << endl;
132  trace.info() << "ball = " << ball << endl;
133  trace.info() << "ball2 = " << ball2 << endl;
134  trace.endBlock();
135 
136  trace.beginBlock ( "Testing border extraction ..." );
137  ObjectType sphere = ball.border();
138  INBLOCK_TEST( sphere.size() == 1434 );
139  trace.info() << sphere << endl;
140  trace.info() << "sphere.size() = " << sphere.size()
141  << " 4*pi*r^2 = " << ( 4.0*M_PI*radius*radius )
142  << endl;
143  trace.endBlock();
144 
145  trace.beginBlock ( "Testing expansion by layers in the ball from center..." );
146  ObjectExpander expander( ball, c );
147  while ( ! expander.finished() )
148  {
149  trace.info() << expander << std::endl;
150  expander.nextLayer();
151  }
152  nbok += expander.distance() <= sqrt(3.0)*radius ? 1 : 0;
153  nb++;
154  trace.info() << "(" << nbok << "/" << nb << ") "
155  << "expander.distance() = " << expander.distance()
156  << " <= " << sqrt(3.0)*radius << std::endl;
157  trace.endBlock();
158 
159  trace.beginBlock ( "Testing expansion by layers on the sphere from a point ..." );
160  ObjectExpander expander2( sphere, l );
161  while ( ! expander2.finished() )
162  {
163  trace.info() << expander2 << std::endl;
164  expander2.nextLayer();
165  }
166  nbok += expander2.distance() <= sqrt(2.0)*M_PI*radius ? 1 : 0;
167  nb++;
168  trace.info() << "(" << nbok << "/" << nb << ") "
169  << "expander2.distance() = " << expander2.distance()
170  << " <= " << sqrt(2.0)*M_PI*radius << std::endl;
171  trace.endBlock();
172 
173 
174  return nbok == nb;
175 }
176 
178 // Standard services - public :
179 
180 int main( int argc, char** argv )
181 {
182  trace.beginBlock ( "Testing class Expander" );
183  trace.info() << "Args:";
184  for ( int i = 0; i < argc; ++i )
185  trace.info() << " " << argv[ i ];
186  trace.info() << endl;
187 
188  bool res = testExpander(); // && ... other tests
189  trace.emphase() << ( res ? "Passed." : "Error." ) << endl;
190  trace.endBlock();
191  return res ? 0 : 1;
192 }
193 // //
Aim: An object (or digital object) represents a set in some digital space associated with a digital t...
Definition: Object.h:119
void beginBlock(const std::string &keyword="")
DigitalSetSelector< Domain, BIG_DS+HIGH_BEL_DS >::Type DigitalSet
Definition: StdDefs.h:100
const ConstIterator & begin() const
const ConstIterator & end() const
DigitalTopology< Adj6, Adj18 > DT6_18
Definition: StdDefs.h:164
Trace trace
Definition: Common.h:130
Aim: SpaceND is a utility class that defines the fundamental structure of a Digital Space in ND...
Definition: SpaceND.h:95
Aim: Parallelepidec region of a digital space, model of a 'CDomain'.
STL namespace.
double endBlock()
Space Z3
Definition: StdDefs.h:145
Aim: Describes digital adjacencies in digital spaces that are defined with the 1-norm and the infinit...
Aim: This class is useful to visit an object by adjacencies, layer by layer.
Definition: Expander.h:97
Aim: Represents a digital topology as a couple of adjacency relations.
MetricAdjacency< Space, 1 > Adj6
Definition: StdDefs.h:159
std::ostream & emphase()
DGtal is the top-level namespace which contains all DGtal functions and types.
Aim: A wrapper class around a STL associative container for storing sets of digital points within som...
std::ostream & info()
Aim: Given a domain and an adjacency, limits the given adjacency to the specified domain for all adja...
MetricAdjacency< Space, 2 > Adj18
Definition: StdDefs.h:161