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graphe.cc
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graphe.cc
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/*
* graphe.cc
*
* (c) 2018 Luka Marohnić
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "giacPCH.h"
#include "giac.h"
#include "graphe.h"
#include "graphtheory.h"
#include "signalprocessing.h"
#include "optimization.h"
#include <ctype.h>
#include <math.h>
#include <ctime>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_LIBNAUTY
#include "nautywrapper.h"
#endif
using namespace std;
#ifndef NO_NAMESPACE_GIAC
namespace giac {
#endif // ndef NO_NAMESPACE_GIAC
const gen graphe::VRAI=gen(1).change_subtype(_INT_BOOLEAN);
const gen graphe::FAUX=gen(0).change_subtype(_INT_BOOLEAN);
bool graphe::verbose=true;
int graphe::default_edge_color=_BLUE;
int graphe::default_edge_width=_LINE_WIDTH_2;
int graphe::bold_edge_width=_LINE_WIDTH_4;
int graphe::default_highlighted_edge_color=_RED;
int graphe::default_highlighted_vertex_color=_GREEN;
int graphe::default_vertex_color=_YELLOW;
int graphe::default_vertex_label_color=_BLACK;
/* messages and logging */
void print_msg_type(int t,GIAC_CONTEXT) {
switch(t) {
case 1: *logptr(contextptr) << gettext("Warning") << ": "; break;
case 2: *logptr(contextptr) << gettext("Error") << ": "; break;
default: break; // normal message
}
}
void graphe::message(const char *str) const {
if (!verbose) return;
*logptr(ctx) << gettext(str) << "\n";
}
void graphe::message(int t,const char *str) const {
if (!verbose) return;
print_msg_type(t,ctx);
*logptr(ctx) << gettext(str) << "\n";
}
void graphe::message(int t,const char *format,int a) const {
if (!verbose) return;
char buffer[256];
sprintf(buffer,gettext(format),a);
print_msg_type(t,ctx);
*logptr(ctx) << buffer << "\n";
}
void graphe::message(int t,const char *format,int a,int b) const {
if (!verbose) return;
char buffer[256];
sprintf(buffer,gettext(format),a,b);
print_msg_type(t,ctx);
*logptr(ctx) << buffer << "\n";
}
void graphe::message(int t,const char *format,int a,int b,int c) const {
if (!verbose) return;
char buffer[256];
sprintf(buffer,gettext(format),a,b,c);
print_msg_type(t,ctx);
*logptr(ctx) << buffer << "\n";
}
void graphe::suspend_logging() {
ctx->globalptr->_logptr_->setstate(ios::ios_base::failbit);
}
void graphe::restore_logging() {
ios::ios_base::iostate s=ctx->globalptr->_logptr_->rdstate() & ~ios::ios_base::failbit;
ctx->globalptr->_logptr_->clear(s);
}
string graphe::giac_version() const {
return genstring2str(_version(change_subtype(vecteur(0),_SEQ__VECT),ctx));
}
/* print functions for debugging */
ostream& operator<<(ostream &os, const graphe::ivector &v)
{
os << "[";
for (graphe::ivector_iter it=v.begin();it!=v.end();++it) {
if (it!=v.begin()) os << ",";
os << *it;
}
os << "]";
return os;
}
ostream& operator<<(ostream &os, const graphe::ivectors &v)
{
os << "[";
for (graphe::ivectors_iter it=v.begin();it!=v.end();++it) {
if (it!=v.begin()) os << ",";
os << *it;
}
os << "]";
return os;
}
ostream& operator<<(ostream &os, const graphe::ipairs &v)
{
os << "[";
for (graphe::ipairs_iter it=v.begin();it!=v.end();++it) {
if (it!=v.begin()) os << ",";
os << "(" << it->first << "," << it->second << ")";
}
os << "]";
return os;
}
/* helper functions */
gen graphe::plusinf() {
return symbolic(at_plus,_IDNT_infinity());
}
double graphe::rand_uniform() const {
gen args=change_subtype(vecteur(0),_SEQ__VECT);
return _rand(args,ctx).to_double(ctx);
}
double graphe::poly_area(const layout &x) {
double a=0;
int n=x.size();
for (int i=0;i<n;++i) {
const point &p1=x[i],&p2=x[(i+1)%n];
assert(p1.size()==2 && p2.size()==2);
a+=p1.front()*p2.back()-p1.back()*p2.front();
}
return fabs(a)/2;
}
int graphe::term_hook(void *info,const char *s) {
*static_cast<std::ostream*>(info) << s;
return true;
}
bool graphe::is_interrupted() {
if (interrupted || ctrl_c) {
interrupted=ctrl_c=false;
return true;
}
return false;
}
/* make a list of integers and return it */
graphe::ivector graphe::make_ivector(int n,...) {
va_list lst;
va_start(lst,n);
ivector res(n);
for (int i=0;i<n;++i) {
res[i]=va_arg(lst,int);
}
return res;
}
/* convert list of lists of integers into vecteur of vecteurs */
void graphe::ivectors2vecteur(const ivectors &v,vecteur &res,bool sort_all) const {
res.resize(v.size());
for (ivectors_iter it=v.begin();it!=v.end();++it) {
res[it-v.begin()]=sort_all?sort_identifiers(get_node_labels(*it),ctx):get_node_labels(*it);
}
}
/* vertex class implementation */
void graphe::vertex::assign_defaults() {
m_subgraph=-1;
m_visited=false;
m_ancestor=-1;
m_low=-1;
m_disc=-1;
m_color=0; // white
m_embedded=false;
m_number=-1;
}
graphe::vertex::vertex(bool support_attributes) {
m_attributes=support_attributes?new attrib():NULL;
m_neighbor_attributes=support_attributes?new map<int,attrib>():NULL;
assign_defaults();
}
graphe::vertex::vertex(const gen &lab,const attrib &attr) {
m_attributes=new attrib();
m_neighbor_attributes=new map<int,attrib>();
assign_defaults();
if (!attr.empty())
set_attributes(attr);
set_label(lab);
}
void graphe::vertex::assign(const vertex &other) {
m_subgraph=other.subgraph();
m_visited=other.is_visited();
m_ancestor=other.ancestor();
m_low=other.low();
m_disc=other.disc();
m_color=other.color();
m_embedded=other.is_embedded();
m_number=other.number();
m_faces=other.edge_faces();
if (!other.supports_attributes()) {
if (supports_attributes()) {
delete m_attributes;
delete m_neighbor_attributes;
}
unsupport_attributes();
} else {
if (!supports_attributes()) {
m_attributes=new attrib();
m_neighbor_attributes=new map<int,attrib>();
}
m_neighbor_attributes->clear();
set_attributes(other.attributes());
}
m_multiedges.clear();
m_neighbors.resize(other.degree());
int k;
for (ivector_iter it=other.neighbors().begin();it!=other.neighbors().end();++it) {
m_neighbors[it-other.neighbors().begin()]=*it;
if (other.supports_attributes())
copy_attributes(other.neighbor_attributes(*it),(*m_neighbor_attributes)[*it]);
if ((k=other.multiedges(*it))>0)
m_multiedges.insert(make_pair(*it,k));
}
}
graphe::vertex::~vertex() {
if (supports_attributes()) {
delete m_attributes;
delete m_neighbor_attributes;
}
}
int graphe::vertex::multiedges(int v) const {
map<int,int>::const_iterator it=m_multiedges.find(v);
if (it!=m_multiedges.end())
return it->second;
return 0;
}
int graphe::vertex::multiedge_count() const {
int count=0;
for (map<int,int>::const_iterator it=m_multiedges.begin();it!=m_multiedges.end();++it) {
count+=it->second;
}
return count;
}
void graphe::vertex::set_multiedge(int v,int k) {
map<int,int>::iterator it=m_multiedges.find(v);
if (k>0)
if (it!=m_multiedges.end())
it->second=k;
else m_multiedges.insert(make_pair(v,k));
else {
if (it!=m_multiedges.end())
m_multiedges.erase(it);
}
}
gen graphe::vertex::label() const {
assert(supports_attributes());
attrib_iter it=m_attributes->find(_GT_ATTRIB_LABEL);
if (it==m_attributes->end())
return undef;
return it->second;
}
graphe::vertex::vertex(const vertex &other) {
m_attributes=other.supports_attributes()?new attrib():NULL;
m_neighbor_attributes=other.supports_attributes()?new map<int,attrib>():NULL;
assign(other);
}
graphe::vertex& graphe::vertex::operator =(const vertex &other) {
assign(other);
return *this;
}
void graphe::vertex::add_neighbor(int i,const attrib &attr) {
if (m_neighbors.empty())
m_neighbors.push_back(i);
else {
ivector::iterator it=std::lower_bound(m_neighbors.begin(),m_neighbors.end(),i);
if (it!=m_neighbors.end() && *it==i)
return;
m_neighbors.insert(it,i);
}
if (supports_attributes())
copy_attributes(attr,(*m_neighbor_attributes)[i]);
}
bool graphe::vertex::is_temporary(int i) const {
const attrib &attr=neighbor_attributes(i);
attrib_iter it=attr.find(_GT_ATTRIB_TEMPORARY);
return it!=attr.end() && giac::is_one(it->second);
}
graphe::attrib &graphe::vertex::neighbor_attributes(int i) {
assert(supports_attributes());
map<int,attrib>::iterator it=m_neighbor_attributes->find(i);
assert(it!=m_neighbor_attributes->end());
return it->second;
}
const graphe::attrib &graphe::vertex::neighbor_attributes(int i) const {
assert(supports_attributes());
neighbor_iter it=m_neighbor_attributes->find(i);
assert(it!=m_neighbor_attributes->end());
return it->second;
}
void graphe::vertex::remove_neighbor(int i) {
ivector::iterator it;
if ((it=std::find(m_neighbors.begin(),m_neighbors.end(),i))==m_neighbors.end())
return;
m_neighbors.erase(it);
if (supports_attributes()) {
map<int,attrib>::iterator jt=m_neighbor_attributes->find(i);
assert(jt!=m_neighbor_attributes->end());
m_neighbor_attributes->erase(jt);
}
map<int,int>::iterator kt=m_multiedges.find(i);
if (kt!=m_multiedges.end())
m_multiedges.erase(kt);
}
void graphe::vertex::clear_neighbors() {
m_neighbors.clear();
if (supports_attributes())
m_neighbor_attributes->clear();
m_multiedges.clear();
}
void graphe::vertex::map_neighbors(const map<int,int> &m) {
ivector::iterator it=m_neighbors.begin(),itend=m_neighbors.end();
map<int,attrib>::iterator jt;
map<int,int>::iterator mt;
attrib attr;
bool sa=supports_attributes();
for (;it!=itend;++it) {
if (sa) {
jt=m_neighbor_attributes->find(*it);
assert(jt!=m_neighbor_attributes->end());
}
mt=m_multiedges.find(*it);
*it=m.at(*it);
if (sa) {
copy_attributes(jt->second,attr);
m_neighbor_attributes->erase(jt);
copy_attributes(attr,(*m_neighbor_attributes)[*it]);
}
if (mt!=m_multiedges.end()) {
int me=mt->second;
m_multiedges.erase(mt);
m_multiedges[*it]=me;
}
}
}
void graphe::vertex::incident_faces(ivector &F) const {
F.resize(m_faces.size());
int i=0,f;
for (map<int,int>::const_iterator it=m_faces.begin();it!=m_faces.end();++it) {
assert((f=it->second)>0);
F[i++]=f-1;
}
}
void graphe::vertex::add_edge_face(int nb,int f) {
assert(m_faces.find(nb)==m_faces.end());
m_faces[nb]=f+1;
}
/* set the given planar embedding */
void graphe::set_embedding(const ivectors &faces) {
int n,f=0,i;
for (ivectors_iter it=faces.begin();it!=faces.end();++it,++f) {
const ivector &face=*it;
n=face.size();
for (i=0;i<n;++i) {
vertex &v=node(face[i]);
v.add_edge_face(face[(i+1)%n],f);
}
}
}
/* clear the previously set embedding */
void graphe::clear_embedding() {
for (std::vector<vertex>::iterator it=nodes.begin();it!=nodes.end();++it) {
it->clear_edge_faces();
}
}
/* get the first neighbor of v in the subgraph sg */
int graphe::first_neighbor_from_subgraph(const vertex &v,int sg) const {
for (ivector_iter it=v.neighbors().begin();it!=v.neighbors().end();++it) {
if (node(*it).subgraph()==sg)
return *it;
}
return -1;
}
/* just a safety measure, the stack should be empty before calling this function */
void graphe::clear_node_stack() {
while (!node_stack.empty())
node_stack.pop();
}
/* clear the node queue */
void graphe::clear_node_queue() {
while (!node_queue.empty())
node_queue.pop();
}
/* return true iff this graph has no edges */
bool graphe::is_empty(int sg) const {
node_iter it=nodes.begin(),itend=nodes.end();
for (;it!=itend;++it) {
if ((sg<0 || it->subgraph()==sg) && !it->neighbors().empty())
return false;
}
return true;
}
/* store all subgraph indices */
void graphe::save_subgraphs() {
ivector sgr(node_count());
node_iter it=nodes.begin(),itend=nodes.end();
int i=0;
for (;it!=itend;++it,++i) {
sgr[i]=it->subgraph();
}
saved_subgraphs.push(sgr);
}
/* restore previously saved subgraph indices */
void graphe::restore_subgraphs() {
assert(!saved_subgraphs.empty() && int(saved_subgraphs.top().size())==node_count());
const ivector &sgr=saved_subgraphs.top();
int i=0;
for (vector<vertex>::iterator it=nodes.begin();it!=nodes.end();++it,++i) {
it->set_subgraph(sgr[i]);
}
saved_subgraphs.pop();
}
/* dotgraph class implementation */
graphe::dotgraph::dotgraph() {
m_index=0;
pos=0;
m_chain=ivector(1,0);
}
graphe::dotgraph::dotgraph(int i) {
m_index=i;
pos=0;
m_chain=ivector(1,0);
}
void graphe::dotgraph::assign(const dotgraph &other) {
m_index=other.index();
copy_attributes(other.vertex_attributes(),vertex_attr);
copy_attributes(other.edge_attributes(),edge_attr);
copy_attributes(other.chain_attributes(),chain_attr);
m_chain=other.chain();
pos=other.position();
}
graphe::dotgraph::dotgraph(const dotgraph &other) {
assign(other);
}
graphe::dotgraph& graphe::dotgraph::operator =(const dotgraph &other) {
assign(other);
return *this;
}
/* rectangle class implementation */
graphe::rectangle::rectangle() {
m_x=m_y=m_width=m_height=0;
L=NULL;
}
graphe::rectangle::rectangle(double X,double Y,double W,double H,layout *ly) {
m_x=X;
m_y=Y;
m_width=W;
m_height=H;
L=ly;
}
void graphe::rectangle::assign(const rectangle &other) {
m_x=other.x();
m_y=other.y();
m_width=other.width();
m_height=other.height();
L=other.get_layout();
}
graphe::rectangle::rectangle(const rectangle &rect) {
assign(rect);
}
graphe::rectangle& graphe::rectangle::operator =(const rectangle &other) {
assign(other);
return *this;
}
bool graphe::rectangle::intersects(const rectangle &other) const {
return x()<other.x()+other.width() &&
x()+width()>other.x() &&
y()<other.y()+other.height() &&
y()+height()>other.y();
}
bool graphe::rectangle::intersects(const vector<rectangle> &rectangles) const {
vector<rectangle>::const_iterator it=rectangles.begin();
for (;it!=rectangles.end();++it) {
if (intersects(*it))
return true;
}
return false;
}
bool graphe::rectangle::intersects(vector<rectangle>::const_iterator first,vector<rectangle>::const_iterator last) const {
vector<rectangle>::const_iterator it=first;
for (;it!=last;++it) {
if (intersects(*it))
return true;
}
return false;
}
/* convert number to binary format and return it as gen of type string */
gen graphe::to_binary(int number,int chars) {
return str2gen(bitset<32>((unsigned long)number).to_string().substr(32-chars),true);
}
/* make a copy of attr */
void graphe::copy_attributes(const attrib &src,attrib &dest) {
dest.clear();
for (attrib_iter it=src.begin();it!=src.end();++it) {
dest.insert(make_pair(it->first,gen(it->second)));
}
}
/* fill the vecteur V with first n integers (0- or 1- based, depending on the mode) */
void graphe::make_default_labels(vecteur &labels,int n,int n0,int offset) const {
int ofs=offset<0?array_start(ctx):offset;
labels.resize(n);
for (int i=0;i<n;++i) {
labels[i]=i+ofs+n0;
}
}
/* create identifier */
gen graphe::make_idnt(const char* name,int index,bool intern) {
string id;
if (intern) id+=" ";
id+=name;
if (index>=0) id+=int2string(index);
return identificateur(id.c_str());
}
/* convert integer to string */
std::string graphe::int2string(int i) {
return printint(i);
}
/* convert string to gen */
gen graphe::str2gen(const string &str,bool isstring) {
if (isstring) {
vector<string> words;
gen space=_char(32,context0);
char *cstr=new char[str.size()+1];
strcpy(cstr,str.c_str());
char *p=strtok(cstr," ");
while (p!=NULL) {
words.push_back(p);
p=strtok(NULL," ");
}
vecteur res;
for (vector<string>::const_iterator it=words.begin();it!=words.end();++it) {
res.push_back(string2gen(*it,false));
if (it+1!=words.end())
res.push_back(space);
}
delete[] cstr;
return _cat(change_subtype(res,_SEQ__VECT),context0);
}
return gen(str,context0);
}
/* convert gen string to std::string (no quotes) */
string graphe::genstring2str(const gen &g) {
assert(g.type==_STRNG);
int len=_size(g,context0).val;
return string(g._STRNGptr->begin(),g._STRNGptr->begin()+len);
}
/* return random permutation of {0,1,..,n-1} */
graphe::ivector graphe::rand_permu(int n) const {
ivector res=vecteur_2_vector_int(*_randperm(n,ctx)._VECTptr);
int ofs=array_start(ctx);
for (ivector::iterator it=res.begin();it!=res.end();++it) {
*it-=ofs;
}
return res;
}
/* insert element val in sorted list V keeping it sorted (in ascending order),
* return an iterator pointing to the inserted element */
graphe::ivector_iter graphe::insert_sorted(ivector &V,int val) {
if (V.empty()) {
V.push_back(val);
return V.begin()+V.size()-1;
}
ivector::iterator it=std::lower_bound(V.begin(),V.end(),val);
int pos=it-V.begin();
V.insert(it,val);
return V.begin()+pos;
}
/* erase element val in sorted list V, return true if val is contained in V,
* else return false and do nothing */
bool graphe::erase_sorted(ivector &V,int val) {
if (V.empty())
return false;
ivector::iterator it=std::lower_bound(V.begin(),V.end(),val);
if (it==V.end())
return false;
if (*it!=val)
return false;
V.erase(it);
return true;
}
/* compute the union of A and B and store it in U */
size_t graphe::sets_union(const iset &A,const iset &B,iset &U) {
U.clear();
std::set_union(A.begin(),A.end(),B.begin(),B.end(),std::inserter(U,U.begin()));
return U.size();
}
/* compute the intersection of A and B and store it in I */
size_t graphe::sets_intersection(const iset &A,const iset &B,iset &I) {
I.clear();
std::set_intersection(A.begin(),A.end(),B.begin(),B.end(),std::inserter(I,I.begin()));
return I.size();
}
/* compute the intersection of A and B and store it in I */
size_t graphe::sets_intersection(const ivector &A,const iset &B,iset &I) {
I.clear();
std::set_intersection(A.begin(),A.end(),B.begin(),B.end(),std::inserter(I,I.begin()));
return I.size();
}
/* compute the set difference of A and B and store it in D */
size_t graphe::sets_difference(const iset &A,const iset &B,iset &D) {
D.clear();
std::set_difference(A.begin(),A.end(),B.begin(),B.end(),std::inserter(D,D.begin()));
return D.size();
}
/* compute the set difference of A and B and store it in D */
size_t graphe::sets_difference(const iset &A,const ivector &B,iset &D) {
D.clear();
std::set_difference(A.begin(),A.end(),B.begin(),B.end(),std::inserter(D,D.begin()));
return D.size();
}
/* return the size of the difference of A and B */
size_t graphe::sets_difference(const ivector &A,const ivector &B,iset &D) {
D.clear();
std::set_difference(A.begin(),A.end(),B.begin(),B.end(),std::inserter(D,D.begin()));
return D.size();
}
/* binary search for an element a in sorted list first...last */
graphe::ivector_iter graphe::binsearch(ivector_iter first,ivector_iter last,int a) {
ivector_iter mid;
while (first!=last) {
mid=first+int(last-first)/2;
if (*mid==a) return mid;
if (*mid>a) last=mid;
else first=mid+1;
}
return first;
}
/* return the intersection size for sorted lists A and B */
size_t graphe::intersect_linear(ivector_iter min1,ivector_iter max1,ivector_iter min2,ivector_iter max2) {
if (min1==max1 || min2==max2 || *min1>*(max2-1) || *min2>*(max1-1)) return 0;
if (*min1>*min2) min2=binsearch(min2,max2,*min1);
else if (*min2>*min1) min1=binsearch(min1,max1,*min2);
size_t result=0;
while (min1!=max1 && min2!=max2) {
if (*min1<*min2) ++min1;
else if (*min2<*min1) ++min2;
else {
result++;
++min1; ++min2;
}
}
return result;
}
/* graphe default constructor */
graphe::graphe(GIAC_CONTEXT,bool support_attributes) {
ctx=contextptr;
m_supports_attributes=support_attributes;
set_graph_attribute(_GT_ATTRIB_DIRECTED,FAUX);
set_graph_attribute(_GT_ATTRIB_WEIGHTED,FAUX);
}
/* graphe constructor, create a copy of G */
graphe::graphe(const graphe &G) {
m_supports_attributes=G.supports_attributes();
set_graph_attribute(_GT_ATTRIB_DIRECTED,boole(G.is_directed()));
set_graph_attribute(_GT_ATTRIB_WEIGHTED,boole(G.is_weighted()));
ctx=G.giac_context();
G.copy(*this);
}
/* graphe constructor, create special graph with the specified name */
graphe::graphe(const string &name,GIAC_CONTEXT,bool support_attributes) {
ctx=contextptr;
m_supports_attributes=support_attributes;
set_graph_attribute(_GT_ATTRIB_DIRECTED,FAUX);
set_graph_attribute(_GT_ATTRIB_WEIGHTED,FAUX);
ivector hull;
layout x;
if (name=="clebsch") {
read_special(clebsch_graph);
if (support_attributes) {
vecteur labels;
for (int i=0;i<16;++i) {
labels.push_back(to_binary(i,4));
}
relabel_nodes(labels);
}
} else if (name=="coxeter") {
if (support_attributes) {
read_special(coxeter_graph_vnames);
for (int i=1;i<=7;++i) {
string ai=string("a")+int2string(i);
hull.push_back(node_index(str2gen(ai,true)));
}
make_circular_layout(x,hull,3.5);
} else read_special(coxeter_graph);
} else if (name=="desargues") {
make_petersen_graph(10,3,support_attributes?&x:NULL);
} else if (name=="barnette-bosak-lederberg") {
read_special(barnette_bosak_lederberg_graph);
if (support_attributes) {
make_planar_layout(x);
layout_best_rotation(x);
}
} else if (name=="bidiakis") {
make_lcf_graph(bidiakis_cube_graph_lcf);
if (support_attributes) {
for (int i=0;i<node_count();++i) hull.push_back(i);
make_circular_layout(x,hull);
layout_best_rotation(x);
}
} else if (name=="brinkmann") {
read_special(brinkmann_graph);
} else if (name=="bull") {
read_special(bull_graph);
if (support_attributes) {
make_spring_layout(x,2);
layout_best_rotation(x);
}
} else if (name=="butterfly") {
read_special(butterfly_graph);
if (support_attributes) {
make_spring_layout(x,2);
layout_best_rotation(x);
}
} else if (name=="blanusa") {
read_special(blanusa_graph);
if (support_attributes) {
for (int i=0;i<6;++i) hull.push_back(i);
add_temporary_edge(0,9);
add_temporary_edge(1,9);
add_temporary_edge(3,15);
add_temporary_edge(4,15);
make_circular_layout(x,hull,2.5,0.005,0.618);
remove_temporary_edges();
}
} else if (name=="brouwer-haemers") {
make_brouwer_haemers_graph();
} else if (name=="diamond") {
read_special(diamond_graph);
if (support_attributes) {
make_spring_layout(x,2);
layout_best_rotation(x);
}
} else if (name=="double-star") {
read_special(double_star_snark);
} else if (name=="doyle") {
read_special(doyle_graph);
} else if (name=="chvatal") {
read_special(chvatal_graph);
if (support_attributes) {
x.resize(12);
for (layout::iterator it=x.begin();it!=x.end();++it) it->resize(2);
x[0][0]=0.43; x[0][1]=2.51; x[1][0]=2.16; x[1][1]=2.02;
x[2][0]=3.89; x[2][1]=2.51; x[3][0]=2.16; x[3][1]=1.12;
x[4][0]=1.25; x[4][1]=3.67; x[5][0]=0.86; x[5][1]=1.34;
x[6][0]=3.47; x[6][1]=1.34; x[7][0]=3.07; x[7][1]=3.67;
x[8][0]=2.83; x[8][1]=2.75; x[9][0]=2.83; x[9][1]=0.43;
x[10][0]=1.49; x[10][1]=0.43; x[11][0]=1.49; x[11][1]=2.75;
}
} else if (name=="dodecahedron") {
make_petersen_graph(10,2,support_attributes?&x:NULL);
if (support_attributes) {
hull=make_ivector(5,0,1,2,12,10);
make_circular_layout(x,hull);
}
} else if (name=="errera") {
read_special(errera_graph);
if (support_attributes) {
for (int i=0;i<3;++i) hull.push_back(i);
make_circular_layout(x,hull);
layout_best_rotation(x);
}
} else if (name=="poussin") {
read_special(poussin_graph);
if (support_attributes) {
make_planar_layout(x);
layout_best_rotation(x);
}
} else if (name=="franklin") {
make_lcf_graph(franklin_graph_lcf);
if (support_attributes) {
for (int i=0;i<node_count();++i) hull.push_back(i);
make_circular_layout(x,hull);
layout_best_rotation(x);
}
} else if (name=="frucht") {
make_lcf_graph(frucht_graph_lcf);
if (support_attributes) {
make_planar_layout(x);
layout_best_rotation(x);
}
} else if (name=="biggs-smith") {
make_lcf_graph(biggs_smith_graph_lcf);
if (support_attributes) {
for (int i=0;i<node_count();++i) hull.push_back(i);
make_circular_layout(x,hull);
}
} else if (name=="duerer") {
make_petersen_graph(6,2,support_attributes?&x:NULL);
} else if (name=="dyck") {
read_special(dyck_graph);
} else if (name=="folkman") {
make_lcf_graph(folkman_graph_lcf);
} else if (name=="gewirtz") {
make_gewirtz_graph();
} else if (name=="gray") {
make_lcf_graph(gray_graph_lcf);
} else if (name=="grinberg") {
read_special(grinberg_graph);
if (support_attributes) {
make_planar_layout(x);
layout_best_rotation(x);
}
} else if (name=="goldner-harary") {
read_special(goldner_harary_graph);
if (support_attributes) {
make_planar_layout(x);
layout_best_rotation(x);
}
} else if (name=="golomb") {
read_special(golomb_graph);
if (support_attributes) {
make_planar_layout(x);
layout_best_rotation(x);
}
} else if (name=="gosset") {
make_gosset_graph();
} else if (name=="groetzsch") {
read_special(grotzsch_graph);
if (support_attributes) {
for (int i=0;i<5;++i) hull.push_back(node_index(i));
make_circular_layout(x,hull,2.5);
}
} else if (name=="f26a") {
make_lcf_graph(f26a_graph_lcf);
} else if (name=="harries") {
make_lcf_graph(harries_graph_lcf);
} else if (name=="harries-wong") {
make_lcf_graph(harries_wong_graph_lcf);
} else if (name=="balaban10") {
make_lcf_graph(balaban_10cage_lcf);
} else if (name=="balaban11") {
make_lcf_graph(balaban_11cage_lcf);
} else if (name=="harborth") {
read_special(harborth_graph);
if (support_attributes) {
make_spring_layout(x,2);
layout_best_rotation(x);
}
} else if (name=="heawood") {
read_special(heawood_graph);
} else if (name=="herschel") {
read_special(herschel_graph);
if (support_attributes) {
make_planar_layout(x);
layout_best_rotation(x);
}
} else if (name=="higman-sims") {
make_higman_sims_graph();
} else if (name=="hoffman") {
if (support_attributes) {
vecteur labels;
make_default_labels(labels,16);
add_nodes(labels);
} else add_nodes(16);
for (int i=0;i<16;++i) for (int j=0;j<16;++j) {
if ((i<8 && j<8) || (i>=8 && j>=8)) continue;
if (hoffman_graph_matrix[i<j?j-8:i-8][i<j?i:j]==1)
add_edge(i,j);
}
if (support_attributes) {
make_spring_layout(x,2);
layout_best_rotation(x);
}
} else if (name=="hoffman-singleton") {
make_hoffman_singleton_graph();
} else if (name=="icosahedron") {
read_special(icosahedral_graph);
if (support_attributes) {
make_planar_layout(x);
layout_best_rotation(x);
}
} else if (name=="levi") {
make_lcf_graph(tutte_8cage_lcf);
} else if (name=="ljubljana") {
make_lcf_graph(ljubljana_graph_lcf);
} else if (name=="foster") {
make_lcf_graph(foster_graph_lcf);
} else if (name=="kittell") {
read_special(kittell_graph);
if (support_attributes) {
for (int i=0;i<3;++i) hull.push_back(i);
make_circular_layout(x,hull);
}
} else if (name=="krackhardt") {
read_special(krackhardt_kite_graph);
if (support_attributes) {
make_spring_layout(x,2);
layout_best_rotation(x);
}
} else if (name=="markstroem") {
read_special(markstroem_graph);
if (support_attributes) {
for (int i=0;i<9;++i) hull.push_back(i);
make_circular_layout(x,hull);
}
} else if (name=="mcgee") {
read_special(mcgee_graph);
} else if (name=="meredith") {