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#include "parser.h"
#include "printer.h"
#include "polynomial.h"
#include "division.h"
#include "lp.h"
#include "gfanapplication.h"
#include "polyhedralcone.h"
#include "polyhedralfan.h"
#include "symmetry.h"
#include "polymakefile.h"
class SubfanApplication : public GFanApplication
{
StringOption inputOption;
SimpleOption optionSymmetry;
public:
const char *helpText()
{
return "This program takes a polyhedral fan and a list of vectors and computes the smallest subfan of the fan having the list of vectors in its support.\n";
}
SubfanApplication():
inputOption("-i","Specify the name of the input file.","polymake.out"),
optionSymmetry("--symmetry",
"Reads in the cone stored with symmetry. The generators of the symmetry group must be given on the standard input.\n")
{
registerOptions();
}
const char *name()
{
return "_fansubfan";
}
int main()
{
IntegerVectorList theVectors=FileParser(Stdin).parseIntegerVectorList();
assert(theVectors.size());
int n=theVectors.begin()->size();
SymmetryGroup s(n);
if(optionSymmetry.getValue())
{
IntegerVectorList generators=FileParser(Stdin).parseIntegerVectorList();
s.computeClosure(generators);
}
PolyhedralFan f1=PolyhedralFan::readFan(inputOption.getValue(),true,0,0,(optionSymmetry.getValue())?&s:0);
PolyhedralFan f2(n);
for(IntegerVectorList::const_iterator i=theVectors.begin();i!=theVectors.end();i++)
f2.insert(f1.coneContaining(*i));
AsciiPrinter P(Stdout);
f2.printWithIndices(&P,FPF_default | FPF_primitiveRays | FPF_multiplicities);
return 0;
}
};
static SubfanApplication theApplication;
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