Vertices<CoordType> SpatialModelMaximalRepulsion3D<CoordType>::drawSample(const int numPoints)
{
ENTER("Vertices<CoordType> SpatialModelMaximalRepulsion3D<CoordType>::drawSample(const int)");
const int outerSteps = getNumMonteCarloCycles();
const int innerSteps = numPoints;
const CoordType beta = computeBeta();
const CoordType maxRadius = this->getTriMesh().equivalentRadius() / 50.0;
Vertices<CoordType> vertices = SpatialModelHardcoreDistance3D<CoordType>::drawSample( numPoints );
RandomGenerator& randomGenerator = this->getRandomGenerator();
CoordType currentEnergy, newEnergy, deltaEnergy;
Vector<CoordType> vertex;
bool acceptTransition;
int i, j, v;
ConvergenceTest<CoordType> convergenceTest;
CoordType sumEnergy;
bool converged = false;
_energyProfile.setZeros( outerSteps );
convergenceTest.setData( _energyProfile );
convergenceTest.setRange( 100 );
for (i = 0; !converged && i < outerSteps; ++i)
{
#if 0
if ( (i%20)==0 )
{
string filename = "max-repulsion-vertices-" + StringTools::toString(i,4,'0') + ".vx";
vertices.save( filename, true );
}
#endif
for (j = 0, sumEnergy = 0.0; j < innerSteps; ++j)
{
v = randomGenerator.uniformL( numPoints );
vertex = vertices[v];
if ( j == 0 ) currentEnergy = energy( vertices );
moveVertex( vertices, v, maxRadius );
newEnergy = energy( vertices );
deltaEnergy = newEnergy - currentEnergy;
acceptTransition = deltaEnergy <= .0 || randomGenerator.uniformLF() < exp( -beta*deltaEnergy );
if ( acceptTransition )
currentEnergy = newEnergy;
else vertices[v] = vertex;
sumEnergy += currentEnergy;
}
_energyProfile[i] = sumEnergy / innerSteps;
converged = convergenceTest.isPositive( i );
}
if ( !converged )
{
Exception exception;
exception.setWhere( "Vertices<CoordType> SpatialModelMaximalRepulsion3D<CoordType>::drawSample(const int)" );
exception.setWhat( "Convergence not reached after " + StringTools::toString(outerSteps) + " iterations" );
throw exception;
}
LEAVE();
return vertices;
}
