Lemma is an Electromagnetics API
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  1. /* This file is part of Lemma, a geophysical modelling and inversion API */
  2. /* This Source Code Form is subject to the terms of the Mozilla Public
  3. * License, v. 2.0. If a copy of the MPL was not distributed with this
  4. * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  5. /**
  6. @file
  7. @author Trevor Irons
  8. @date 05/18/2010
  9. @version $Id: PolygonalWireAntenna.h 211 2015-02-27 05:43:26Z tirons $
  10. **/
  11. #ifndef POLYGONALWIREANTENNA_INC
  12. #define POLYGONALWIREANTENNA_INC
  13. #include "DipoleSource.h"
  14. #include "WireAntenna.h"
  15. namespace Lemma {
  16. // ===================================================================
  17. // Class: PolygonalWireAntenna
  18. /// \ingroup FDEM1D
  19. /// \brief Class representing polygonal wire antennae.
  20. /// \details For EM calculations, dipoles representing this loop are
  21. /// created dynamically, depending on receiver location.
  22. /// @todo enforce minimum dipole moment.
  23. // ===================================================================
  24. class PolygonalWireAntenna : public WireAntenna {
  25. friend std::ostream &operator<<(std::ostream &stream, const PolygonalWireAntenna &ob);
  26. public:
  27. // ==================== LIFECYCLE =======================
  28. /// Default protected constructor.
  29. explicit PolygonalWireAntenna ( const ctor_key& );
  30. /// Default protected constructor.
  31. PolygonalWireAntenna (const YAML::Node& node, const ctor_key& );
  32. /// Default protected constructor.
  33. virtual ~PolygonalWireAntenna ();
  34. /**
  35. * Declares all memory and returns a new instance.
  36. */
  37. static std::shared_ptr<PolygonalWireAntenna> NewSP();
  38. /// Makes a deep copy of this antenna with all connections except
  39. /// the dipole approximation.
  40. virtual std::shared_ptr<WireAntenna> Clone() const ;
  41. /// Makes a deep copy of this antenna with all connections except
  42. /// the dipole approximation.
  43. virtual std::shared_ptr<PolygonalWireAntenna> ClonePA() const ;
  44. /**
  45. * Uses YAML to serialize this object.
  46. * @return a YAML::Node
  47. */
  48. YAML::Node Serialize() const;
  49. /**
  50. * Constructs an object from a YAML::Node.
  51. */
  52. static std::shared_ptr<PolygonalWireAntenna> DeSerialize(const YAML::Node& node);
  53. // ==================== OPERATORS =======================
  54. // ==================== OPERATIONS =======================
  55. /// Approximates with ungrounded electrical dipoles, such that
  56. /// minDipoleRatio is satisfied.
  57. virtual void ApproximateWithElectricDipoles(const Vector3r &rp);
  58. /** Sets the minimum ratio for dipole moments to be used to
  59. * approximate the loop. A smaller ratio yields a more accurate
  60. * result, but is more expensive. Default is (1/5).
  61. */
  62. void SetMinDipoleRatio(const Real& ratio);
  63. /** Sets the minimum moment for dipole moments to be used to
  64. * approximate the loop.
  65. */
  66. void SetMinDipoleMoment(const Real& m);
  67. /** Sets the minimum moment for dipole moments to be used to
  68. * approximate the loop.
  69. */
  70. void SetMaxDipoleMoment(const Real& m);
  71. // ==================== ACCESS =======================
  72. // ==================== INQUIRY =======================
  73. /** Returns the name of the underlying class, similiar to Python's type */
  74. virtual std::string GetName() const ;
  75. protected:
  76. // ==================== DATA MEMBERS =======================
  77. /// minimum ratio of dipole moment to distance to receiver point
  78. Real minDipoleRatio;
  79. /// Maximum dipole moment allowed
  80. Real minDipoleMoment;
  81. /// Maximum dipole moment allowed
  82. Real maxDipoleMoment;
  83. /// appends
  84. void PushXYZDipoles( const Vector3r &step, const Vector3r &cp,
  85. const Vector3r &dir,
  86. std::vector< std::shared_ptr<DipoleSource> > &Dipoles) ;
  87. /// corrects for overstep
  88. void CorrectOverstepXYZDipoles( const Vector3r &step,
  89. const Vector3r &cp,
  90. const Vector3r &dir,
  91. std::vector< std::shared_ptr<DipoleSource> > &Dipoles );
  92. // ==================== OPERATIONS =======================
  93. /// Returns the nearest point on a line segment to another point.
  94. /// if the point is not on the line-segment, return the
  95. /// nearest end-point
  96. /// @param[in] p0, p1 define the line segement
  97. /// @param[in] rp is a point in space. The function returns the
  98. /// closest point on the line to this point.
  99. /// @return The point (Lemma::Vector3r) on the line defined by p0,
  100. /// and p1, closest to rp
  101. Vector3r ClosestPointOnLine(const Vector3r &p0, const Vector3r &p1,
  102. const Vector3r &rp);
  103. /// Interpolates dipoles along line segment defined by p0 and p1.
  104. void InterpolateLineSegment(const Vector3r &p0, const Vector3r &p1,
  105. const Vector3r &rp);
  106. /// List of the dipoles
  107. //std::vector<DipoleSource*> Dipoles;
  108. /// Points that define this loop
  109. //Vector3Xr Points;
  110. private:
  111. Vector3r rRepeat;
  112. static constexpr auto CName = "PolygonalWireAntenna";
  113. }; // ----- end of class PolygonalWireAntenna -----
  114. } // ----- end of Lemma name -----
  115. #endif // ----- #ifndef POLYGONALWIREANTENNA_INC -----