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2 | // ******************************************************************** |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: G4FConicalSurface.hh,v 1.13 2006/06/29 18:39:21 gunter Exp $ |
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28 | // GEANT4 tag $Name: HEAD $ |
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29 | // |
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30 | // ---------------------------------------------------------------------- |
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31 | // Class G4FConicalSurface |
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32 | // |
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33 | // Class description: |
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34 | // |
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35 | // Definition of a generic conical surface. |
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36 | /* |
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37 | Position.axis| |
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38 | | |
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39 | -- ---|--- small_radius |
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40 | l | / | \ |
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41 | e | / | \ |
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42 | n | / | \ |
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43 | g | / | \ |
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44 | t | / | \ |
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45 | h | / | \ |
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46 | -- ---------|--------- large_radius |
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47 | Position |
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48 | */ |
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49 | |
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50 | // The code for G4FConicalSurface has been derived from the original |
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51 | // implementation in the "Gismo" package. |
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52 | // |
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53 | // Author: Alan Breakstone |
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54 | // Adaptation: J.Sulkimo, P.Urban. |
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55 | // Revisions by: L.Broglia, G.Cosmo. |
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56 | // ---------------------------------------------------------------------- |
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57 | #ifndef __FCONIC_H |
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58 | #define __FCONIC_H |
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59 | |
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60 | #include "G4PointRat.hh" |
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61 | #include "G4Axis2Placement3D.hh" |
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62 | #include "G4Surface.hh" |
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63 | |
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64 | class G4FConicalSurface : public G4Surface |
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65 | { |
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66 | |
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67 | public: // with description |
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68 | |
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69 | G4FConicalSurface(); |
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70 | virtual ~G4FConicalSurface(); |
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71 | // Default constructor and destructor. |
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72 | |
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73 | G4FConicalSurface( const G4Point3D& o, const G4Vector3D& a, |
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74 | G4double l, G4double sr, G4double lr ); |
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75 | // o : origin of the G4FConicalSurface. |
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76 | // a : axis of the G4FConicalSurface. |
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77 | // l : length of the G4FConicalSurface. |
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78 | // sl: small radius of the G4FConicalSurface. |
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79 | // lr: large radius of the G4FConicalSurface. |
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80 | |
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81 | virtual G4Vector3D SurfaceNormal( const G4Point3D& p ) const; |
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82 | // Returns the normal to the surface on point p. |
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83 | |
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84 | G4int Inside( const G4Vector3D& x ) const; |
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85 | // Returns 0 if point x is outside G4ConicalSurface, 1 if Inside. |
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86 | |
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87 | inline G4String GetEntityType() const; |
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88 | // Returns the type identifier. |
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89 | |
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90 | virtual const char* Name() const; |
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91 | // Returns the class type name. |
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92 | |
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93 | virtual void PrintOn( std::ostream& os = G4cout ) const; |
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94 | // Printing function. |
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95 | |
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96 | G4int operator==( const G4FConicalSurface& c ) const; |
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97 | // Equality operator. |
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98 | |
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99 | G4int Intersect( const G4Ray& ry ); |
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100 | // Counts the number of intersections of a bounded conical surface by a ray. |
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101 | // At first, calculates the intersections with the semi-infinite |
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102 | // conical surface; then, it counts the intersections within the |
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103 | // finite conical surface boundaries, and sets the "distance" to the |
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104 | // closest distance from the start point to the nearest intersection. |
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105 | // If the point is on the surface it returns or the intersection with |
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106 | // the opposite surface or kInfinity. |
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107 | // If no intersection is found, it sets distance = kInfinity and returns 0. |
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108 | |
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109 | void CalcBBox(); |
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110 | // Computes the bounding-box. |
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111 | |
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112 | virtual G4double HowNear( const G4Vector3D& x ) const; |
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113 | // Computes the shortest distance from the point x to the G4FConicalSurface. |
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114 | // The distance will always be positive. |
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115 | // This function works only with Cone axis equal (0,0,1) or (0,0,-1), |
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116 | // it projects the surface and the point on the x,z plane and computes |
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117 | // the distance in analytical way. |
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118 | |
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119 | virtual G4int WithinBoundary( const G4Vector3D& x ) const; |
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120 | // Returns 1 if the point x is within the boundary, returns 0 otherwise. |
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121 | |
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122 | virtual G4double Scale() const; |
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123 | // Returns the size of a G4FConicalSurface. |
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124 | // Used for Scale-invariant tests of surface thickness. |
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125 | // If the small radius is zero, returns the large radius. |
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126 | |
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127 | virtual G4double Area() const; |
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128 | // Calculates the area of a G4FConicalSurface. |
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129 | |
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130 | virtual void resize( G4double l, G4double sr, G4double lr ); |
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131 | // Changes the radii and length of the G4FConicalSurface. |
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132 | // - l (input) argument: the new length |
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133 | // - sr (input) argument: the new small radius |
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134 | // - lr (input) argument: the new large radius |
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135 | |
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136 | |
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137 | inline G4double GetLength() const; |
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138 | inline G4double GetSmallRadius() const; |
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139 | inline G4double GetLargeRadius() const; |
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140 | inline G4double GetTan_Angle() const; |
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141 | // Accessors to dimensions of the G4FConicalSurface. |
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142 | |
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143 | protected: |
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144 | |
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145 | G4double length; |
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146 | // length of G4FConicalSurface |
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147 | |
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148 | G4double small_radius; |
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149 | // small radius of G4FConicalSurface, can be zero |
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150 | G4double large_radius; |
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151 | // large radius of G4FConicalSurface, must be greater than the small |
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152 | // radius. Note that the angle of the G4ConicalSurface is calculated |
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153 | // from these three quantities. |
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154 | |
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155 | G4Axis2Placement3D Position; |
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156 | G4double tan_angle; |
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157 | |
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158 | private: |
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159 | |
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160 | G4FConicalSurface(const G4FConicalSurface&); |
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161 | G4FConicalSurface& operator=(const G4FConicalSurface&); |
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162 | // Private copy constructor and assignment operator. |
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163 | |
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164 | }; |
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165 | |
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166 | #include "G4FConicalSurface.icc" |
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167 | |
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168 | #endif |
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