Finite2DLatticePositionBuilder Class Reference

Inheritance diagram for Finite2DLatticePositionBuilder:

Collaboration diagram for Finite2DLatticePositionBuilder:

Public Member Functions
	Finite2DLatticePositionBuilder (const InterferenceFunctionFinite2DLattice *p_iff)
	~Finite2DLatticePositionBuilder () override
std::vector< std::vector< double > >	generatePositions (double layer_size, double density=0.0) const

Private Member Functions
std::vector< std::vector< double > >	generatePositionsImpl (double layer_size, double density=0.0) const override
double	positionVariance () const override

Private Attributes
std::unique_ptr< InterferenceFunctionFinite2DLattice >	m_iff

Detailed Description

Definition at line 102 of file IPositionBuilder.h.

Constructor & Destructor Documentation

Finite2DLatticePositionBuilder()

Finite2DLatticePositionBuilder::Finite2DLatticePositionBuilder

(

const InterferenceFunctionFinite2DLattice *

p_iff

)

Definition at line 177 of file IPositionBuilder.cpp.

    : m_iff(p_iff->clone())
{
}

~Finite2DLatticePositionBuilder()

Finite2DLatticePositionBuilder::~Finite2DLatticePositionBuilder ( )

overridedefault

Member Function Documentation

generatePositions()

std::vector< std::vector< double > > IPositionBuilder::generatePositions ( double  layer_size, double  density = 0.0  ) const

inherited

Definition at line 28 of file IPositionBuilder.cpp.

{
    std::vector<std::vector<double>> positions = generatePositionsImpl(layer_size, density);
    double pos_var = positionVariance();
    if (pos_var > 0.0) {
        // random generator and distribution
        std::random_device rd;  // Will be used to obtain a seed for the random number engine
        std::mt19937 gen(rd()); // Standard mersenne_twister_engine seeded with rd()
        std::normal_distribution<double> dis(0.0, std::sqrt(pos_var));
        for (auto& position : positions) {
            for (auto& coordinate : position)
                coordinate += dis(gen);
        }
    }
    return positions;
}

References IPositionBuilder::generatePositionsImpl(), and IPositionBuilder::positionVariance().

Here is the call graph for this function:

generatePositionsImpl()

std::vector< std::vector< double > > Finite2DLatticePositionBuilder::generatePositionsImpl ( double  layer_size, double  density = 0.0  ) const

overrideprivatevirtual

Implements IPositionBuilder.

Definition at line 186 of file IPositionBuilder.cpp.

{
    auto& lattice = m_iff->lattice();
    double l1 = lattice.length1();
    double l2 = lattice.length2();
    double alpha = lattice.latticeAngle();
    double xi = lattice.rotationAngle();
 
    unsigned n1, n2;
    double sina = std::abs(std::sin(alpha));
    if (sina <= 1e-4) {
        n1 = l1 == 0.0 ? 2 : static_cast<unsigned>(2.0 * layer_size * std::sqrt(2.0) / l1);
        n2 = l2 == 0.0 ? 2 : static_cast<unsigned>(2.0 * layer_size * std::sqrt(2.0) / l2);
    } else {
        n1 = l1 == 0.0 ? 2 : static_cast<unsigned>(2.0 * layer_size * std::sqrt(2.0) / l1 / sina);
        n2 = l2 == 0.0 ? 2 : static_cast<unsigned>(2.0 * layer_size * std::sqrt(2.0) / l2 / sina);
    }
    n1 = std::min(n1, m_iff->numberUnitCells1());
    n2 = std::min(n2, m_iff->numberUnitCells2());
 
    return Generate2DLatticePoints(l1, l2, alpha, xi, n1, n2);
}

References m_iff.

positionVariance()

double Finite2DLatticePositionBuilder::positionVariance ( ) const

overrideprivatevirtual

Implements IPositionBuilder.

Definition at line 209 of file IPositionBuilder.cpp.

{
    return m_iff->positionVariance();
}

References m_iff.

Member Data Documentation

m_iff

std::unique_ptr<InterferenceFunctionFinite2DLattice> Finite2DLatticePositionBuilder::m_iff

private

Definition at line 111 of file IPositionBuilder.h.

Referenced by generatePositionsImpl(), and positionVariance().

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The documentation for this class was generated from the following files:

• /home/www/ba/GUI/coregui/Views/RealSpaceWidgets/IPositionBuilder.h
• /home/www/ba/GUI/coregui/Views/RealSpaceWidgets/IPositionBuilder.cpp