SmoothCurve.hpp

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/*
 * SmoothCurve.hpp
 *
 */

#ifndef SMOOTHCURVE_HPP_
#define SMOOTHCURVE_HPP_

#include "moab/Interface.hpp"
#include "moab/Forward.hpp"
#include "moab/CartVect.hpp"

//#include "RefEdge.hpp"
//#include "SmoothFace.hpp"

#include <map>
#include <vector>

namespace moab
{
class SmoothFace;
class GeomTopoTool;
// class SmoothVertex;

// class CMLEdgeMesher;
// evaluator for Camal Edge Mesher
// this is really copying what Cubit is doing

class SmoothCurve
{
  public:
    // SmoothCurve(RefEdge * edge, SmoothFace * smoothFaceEval, int loopIndex);
    SmoothCurve( Interface* mb, EntityHandle curve,
                 GeomTopoTool* gTool );  // the new constructor, which will use
    // sense entities to establish the control points on feature edges (geo edges, sets of mesh
    // edges)
    virtual ~SmoothCurve();

    virtual double arc_length();

    //! \brief Get the parametric status of the curve.
    //!
    //! \return \a true if curve is parametric, \a false otherwise.
    virtual bool is_parametric();

    //! \brief Get the periodic status of the curve.
    //!
    //! \param period The period of the curve if periodic.
    //!
    //! \return \a true if curve is periodic, \a false otherwise.
    virtual bool is_periodic( double& period );

    //! \brief Get the parameter range of the curve.
    //!
    //! \param u_start The beginning curve parameter
    //! \param u_end The ending curve parameter
    //!
    //! \note The numerical value of \a u_start may be greater
    //! than the numerical value of \a u_end.
    virtual void get_param_range( double& u_start, double& u_end );

    //! Compute the parameter value at a specified distance along the curve.
    //!
    //! \param u_root The start parameter from which to compute the distance
    //! along the curve.
    //! \param arc_length The distance to move along the curve.
    //!
    //! \note For positive values of \a arc_length the distance will be
    //! computed in the direction of increasing parameter value along the
    //! curve.  For negative values of \a arc_length the distance will be
    //! computed in the direction of decreasing parameter value along the
    //! curve.
    //!
    //! \return The parametric coordinate u along the curve
    virtual double u_from_arc_length( double u_root, double arc_length );

    //! \brief Evaluate the curve at a specified parameter value.
    //!
    //! \param u The parameter at which to evaluate the curve
    //! \param x The x coordinate of the evaluated point
    //! \param y The y coordinate of the evaluated point
    //! \param z The z coordinate of the evaluated point
    // ! \param tg, if not null, return the tangent too at u
    virtual bool position_from_u( double u, double& x, double& y, double& z, double* tg = NULL );

    //! \brief Move a point near the curve to the closest point on the curve.
    //!
    //! \param x The x coordinate of the point
    //! \param y The y coordinate of the point
    //! \param z The z coordinate of the point
    virtual void move_to_curve( double& x, double& y, double& z );

    //! Get the u parameter value on the curve closest to x,y,z
    //! and the point on the curve.
    //!
    //! \param x The x coordinate of the point
    //! \param y The y coordinate of the point
    //! \param z The z coordinate of the point
    //!
    //! \return The parametric coordinate u on the curve
    virtual double u_from_position( double x, double y, double z, EntityHandle& v, int& indexEdge );

    //! \brief Get the starting point of the curve.
    //!
    //! \param x The x coordinate of the start point
    //! \param y The y coordinate of the start point
    //! \param z The z coordinate of the start point
    virtual void start_coordinates( double& x, double& y, double& z );

    //! \brief Get the ending point of the curve.
    //!
    //! \param x The x coordinate of the start point
    //! \param y The y coordinate of the start point
    //! \param z The z coordinate of the start point
    virtual void end_coordinates( double& x, double& y, double& z );

    // this will recompute the 2 tangents for each edge, considering the geo edge they are into
    void compute_tangents_for_each_edge();

    void compute_control_points_on_boundary_edges( double min_dot,
                                                   std::map< EntityHandle, SmoothFace* >& mapSurfaces,
                                                   Tag controlPointsTag,
                                                   Tag markTag );

    ErrorCode evaluate_smooth_edge( EntityHandle eh, double& tt, CartVect& outv, CartVect& out_tangent );

  private:
    std::vector< EntityHandle > _entities;  // the mesh edges are stored here for fast access
    double _leng;
    std::vector< double > _fractions;  // they are increasing from 0. to 1., do we need these?
    // this will be decided apriori, and eventually reset for paver
    // fractions will be from 0.0.. to 1.0, they will be decided upon the length of the geo edge

    Tag _edgeTag;

    Interface* _mb;
    EntityHandle _set;
    GeomTopoTool* _gtt;
};

}  // namespace moab
#endif /* SMOOTHCURVE_HPP_ */