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42cf5bc1 | 1 | // Created on: 1992-10-20 |

2 | // Created by: Remi GILET | |

3 | // Copyright (c) 1992-1999 Matra Datavision | |

4 | // Copyright (c) 1999-2014 OPEN CASCADE SAS | |

5 | // | |

6 | // This file is part of Open CASCADE Technology software library. | |

7 | // | |

8 | // This library is free software; you can redistribute it and/or modify it under | |

9 | // the terms of the GNU Lesser General Public License version 2.1 as published | |

10 | // by the Free Software Foundation, with special exception defined in the file | |

11 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT | |

12 | // distribution for complete text of the license and disclaimer of any warranty. | |

13 | // | |

14 | // Alternatively, this file may be used under the terms of Open CASCADE | |

15 | // commercial license or contractual agreement. | |

16 | ||

17 | #ifndef _Geom2dGcc_Circ2dTanCen_HeaderFile | |

18 | #define _Geom2dGcc_Circ2dTanCen_HeaderFile | |

19 | ||

20 | #include <Standard.hxx> | |

21 | #include <Standard_DefineAlloc.hxx> | |

22 | #include <Standard_Handle.hxx> | |

23 | ||

24 | #include <Standard_Boolean.hxx> | |

25 | #include <Standard_Integer.hxx> | |

26 | #include <TColgp_Array1OfCirc2d.hxx> | |

27 | #include <GccEnt_Array1OfPosition.hxx> | |

28 | #include <TColStd_Array1OfInteger.hxx> | |

29 | #include <TColgp_Array1OfPnt2d.hxx> | |

30 | #include <TColStd_Array1OfReal.hxx> | |

31 | #include <Standard_Real.hxx> | |

32 | #include <GccEnt_Position.hxx> | |

33 | class Standard_OutOfRange; | |

34 | class GccEnt_BadQualifier; | |

35 | class StdFail_NotDone; | |

36 | class Geom2dGcc_QualifiedCurve; | |

37 | class Geom2d_Point; | |

38 | class gp_Circ2d; | |

39 | class gp_Pnt2d; | |

40 | ||

41 | ||

42 | //! This class implements the algorithms used to | |

43 | //! create 2d circles tangent to a curve and | |

44 | //! centered on a point. | |

45 | //! The arguments of all construction methods are : | |

46 | //! - The qualified element for the tangency constrains | |

47 | //! (QualifiedCurv). | |

48 | //! -The center point Pcenter. | |

49 | //! - A real Tolerance. | |

50 | //! Tolerance is only used in the limits cases. | |

51 | //! For example : | |

52 | //! We want to create a circle tangent to an EnclosedCurv C1 | |

53 | //! with a tolerance Tolerance. | |

54 | //! If we did not used Tolerance it is impossible to | |

55 | //! find a solution in the the following case : Pcenter is | |

56 | //! outside C1. | |

57 | //! With Tolerance we will give a solution if the distance | |

58 | //! between C1 and Pcenter is lower than or equal Tolerance/2. | |

59 | class Geom2dGcc_Circ2dTanCen | |

60 | { | |

61 | public: | |

62 | ||

63 | DEFINE_STANDARD_ALLOC | |

64 | ||

65 | ||

66 | //! Constructs one or more 2D circles tangential to the | |

67 | //! curve Qualified1 and centered on the point Pcenter. | |

68 | //! Tolerance is a tolerance criterion used by the algorithm | |

69 | //! to find a solution when, mathematically, the problem | |

70 | //! posed does not have a solution, but where there is | |

71 | //! numeric uncertainty attached to the arguments. | |

72 | //! Tolerance is only used in these algorithms in very | |

73 | //! specific cases where the center of the solution is very | |

74 | //! close to the circle to which it is tangential, and where the | |

75 | //! solution is thus a very small circle. | |

76 | //! Exceptions | |

77 | //! GccEnt_BadQualifier if a qualifier is inconsistent with | |

78 | //! the argument it qualifies (for example, enclosing for a line). | |

79 | Standard_EXPORT Geom2dGcc_Circ2dTanCen(const Geom2dGcc_QualifiedCurve& Qualified1, const Handle(Geom2d_Point)& Pcenter, const Standard_Real Tolerance); | |

80 | ||

81 | //! Returns true if the construction algorithm does not fail | |

82 | //! (even if it finds no solution). | |

83 | //! Note: IsDone protects against a failure arising from a | |

84 | //! more internal intersection algorithm, which has reached | |

85 | //! its numeric limits. | |

86 | Standard_EXPORT Standard_Boolean IsDone() const; | |

87 | ||

88 | //! Returns the number of circles, representing solutions | |

89 | //! computed by this algorithm. | |

90 | //! Exceptions | |

91 | //! StdFail_NotDone if the construction fails. | |

92 | Standard_EXPORT Standard_Integer NbSolutions() const; | |

93 | ||

94 | //! Returns a circle, representing the solution of index | |

95 | //! Index computed by this algorithm. | |

96 | //! Warning | |

97 | //! This indexing simply provides a means of consulting the | |

98 | //! solutions. The index values are not associated with | |

99 | //! these solutions outside the context of the algorithm object. | |

100 | //! Exceptions | |

101 | //! Standard_OutOfRange if Index is less than zero or | |

102 | //! greater than the number of solutions computed by this algorithm. | |

103 | //! StdFail_NotDone if the construction fails | |

104 | Standard_EXPORT gp_Circ2d ThisSolution (const Standard_Integer Index) const; | |

105 | ||

106 | //! Returns the qualifier Qualif1 of the tangency argument | |

107 | //! for the solution of index Index computed by this algorithm. | |

108 | //! The returned qualifier is: | |

109 | //! - that specified at the start of construction when the | |

110 | //! solutions are defined as enclosed, enclosing or | |

111 | //! outside with respect to the argument, or | |

112 | //! - that computed during construction (i.e. enclosed, | |

113 | //! enclosing or outside) when the solutions are defined | |

114 | //! as unqualified with respect to the argument. | |

115 | //! Exceptions | |

116 | //! Standard_OutOfRange if Index is less than zero or | |

117 | //! greater than the number of solutions computed by this algorithm. | |

118 | //! StdFail_NotDone if the construction fails. | |

119 | Standard_EXPORT void WhichQualifier (const Standard_Integer Index, GccEnt_Position& Qualif1) const; | |

120 | ||

121 | //! Returns informations about the tangency point between the | |

122 | //! result number Index and the first argument. | |

123 | //! ParSol is the intrinsic parameter of the point PntSol on the solution curv. | |

124 | //! ParArg is the intrinsic parameter of the point PntSol on the argument curv. | |

125 | //! Exceptions | |

126 | //! Standard_OutOfRange if Index is less than zero or | |

127 | //! greater than the number of solutions computed by this algorithm. | |

128 | //! StdFail_NotDone if the construction fails. | |

129 | Standard_EXPORT void Tangency1 (const Standard_Integer Index, Standard_Real& ParSol, Standard_Real& ParArg, gp_Pnt2d& PntSol) const; | |

130 | ||

131 | //! Returns true if the solution of index Index and the first | |

132 | //! argument of this algorithm are the same (i.e. there are 2 | |

133 | //! identical circles). | |

134 | //! If Rarg is the radius of the first argument, Rsol is the | |

135 | //! radius of the solution and dist is the distance between | |

136 | //! the two centers, we consider the two circles to be | |

137 | //! identical if |Rarg - Rsol| and dist are less than | |

138 | //! or equal to the tolerance criterion given at the time of | |

139 | //! construction of this algorithm. | |

140 | //! NotDone is raised if the construction algorithm didn't succeed. | |

141 | //! OutOfRange is raised if Index is greater than the | |

142 | //! number of solutions. | |

143 | Standard_EXPORT Standard_Boolean IsTheSame1 (const Standard_Integer Index) const; | |

144 | ||

145 | ||

146 | ||

147 | ||

148 | protected: | |

149 | ||

150 | ||

151 | ||

152 | ||

153 | ||

154 | private: | |

155 | ||

156 | ||

157 | ||

158 | Standard_Boolean WellDone; | |

159 | Standard_Integer NbrSol; | |

160 | TColgp_Array1OfCirc2d cirsol; | |

161 | GccEnt_Array1OfPosition qualifier1; | |

162 | TColStd_Array1OfInteger TheSame1; | |

163 | TColgp_Array1OfPnt2d pnttg1sol; | |

164 | TColStd_Array1OfReal par1sol; | |

165 | TColStd_Array1OfReal pararg1; | |

166 | ||

167 | ||

168 | }; | |

169 | ||

170 | ||

171 | ||

172 | ||

173 | ||

174 | ||

175 | ||

176 | #endif // _Geom2dGcc_Circ2dTanCen_HeaderFile |