FruchtermanReingold.h

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#pragma once
 
#include <ogdf/basic/Graph.h>
#include <ogdf/basic/NodeArray.h>
#include <ogdf/basic/geometry.h>
#include <ogdf/energybased/fmmm/EdgeAttributes.h>
#include <ogdf/energybased/fmmm/NodeAttributes.h>
 
namespace ogdf {
namespace energybased {
namespace fmmm {
 
class OGDF_EXPORT FruchtermanReingold {
public:
    FruchtermanReingold();
 
    void calculate_exact_repulsive_forces(const Graph& G, NodeArray<NodeAttributes>& A,
            NodeArray<DPoint>& F_rep);
 
    void calculate_approx_repulsive_forces(const Graph& G, NodeArray<NodeAttributes>& A,
            NodeArray<DPoint>& F_rep);
 
    void make_initialisations(double boxlength, DPoint down_left_corner, int grid_quotient);
 
    void update_boxlength_and_cornercoordinate(double b_l, DPoint d_l_c) {
        boxlength = b_l;
        down_left_corner = d_l_c;
    }
 
private:
    int _grid_quotient; 
    int max_gridindex; 
    double boxlength; 
    DPoint down_left_corner; 
 
    void grid_quotient(int p) { _grid_quotient = ((0 <= p) ? p : 2); }
 
    int grid_quotient() const { return _grid_quotient; }
};
 
}
}
}