1 // Created on: 1991-07-15
2 // Created by: Isabelle GRIGNON
3 // Copyright (c) 1991-1999 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 _CPnts_AbscissaPoint_HeaderFile
18 #define _CPnts_AbscissaPoint_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_Real.hxx>
26 #include <CPnts_MyRootFunction.hxx>
27 class StdFail_NotDone;
28 class Standard_ConstructionError;
29 class Adaptor3d_Curve;
30 class Adaptor2d_Curve2d;
31 
32 
33 //! the algorithm computes a point on a curve at a given
34 //! distance from another point on the curve
35 //!
36 //! We can instantiates with
37 //! Curve from Adaptor3d, Pnt from gp, Vec from gp
38 //!
39 //! or
40 //! Curve2d from Adaptor2d, Pnt2d from gp, Vec2d from gp
41 class CPnts_AbscissaPoint
42 {
43 public:
44 
45   DEFINE_STANDARD_ALLOC
46 
47 
48   //! Computes the length of the Curve <C>.
49   Standard_EXPORT static Standard_Real Length (const Adaptor3d_Curve& C);
50 
51   //! Computes the length of the Curve <C>.
52   Standard_EXPORT static Standard_Real Length (const Adaptor2d_Curve2d& C);
53 
54   //! Computes the length of the Curve <C> with the given tolerance.
55   Standard_EXPORT static Standard_Real Length (const Adaptor3d_Curve& C, const Standard_Real Tol);
56 
57   //! Computes the length of the Curve <C> with the given tolerance.
58   Standard_EXPORT static Standard_Real Length (const Adaptor2d_Curve2d& C, const Standard_Real Tol);
59 
60   //! Computes the length of the Curve <C> between <U1> and <U2>.
61   Standard_EXPORT static Standard_Real Length (const Adaptor3d_Curve& C, const Standard_Real U1, const Standard_Real U2);
62 
63   //! Computes the length of the Curve <C> between <U1> and <U2>.
64   Standard_EXPORT static Standard_Real Length (const Adaptor2d_Curve2d& C, const Standard_Real U1, const Standard_Real U2);
65 
66   //! Computes the length of the Curve <C> between <U1> and <U2> with the given tolerance.
67   Standard_EXPORT static Standard_Real Length (const Adaptor3d_Curve& C, const Standard_Real U1, const Standard_Real U2, const Standard_Real Tol);
68 
69   //! Computes the length of the Curve <C> between <U1> and <U2> with the given tolerance.
70   //! creation of a indefinite AbscissaPoint.
71   Standard_EXPORT static Standard_Real Length (const Adaptor2d_Curve2d& C, const Standard_Real U1, const Standard_Real U2, const Standard_Real Tol);
72 
73   Standard_EXPORT CPnts_AbscissaPoint();
74 
75   //! the algorithm computes a point on a curve <Curve> at the
76   //! distance <Abscissa> from the point of parameter <U0>.
77   //! <Resolution> is the error allowed in the computation.
78   //! The computed point can be outside of the curve 's bounds.
79   Standard_EXPORT CPnts_AbscissaPoint(const Adaptor3d_Curve& C, const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Resolution);
80 
81   //! the algorithm computes a point on a curve <Curve> at the
82   //! distance <Abscissa> from the point of parameter <U0>.
83   //! <Resolution> is the error allowed in the computation.
84   //! The computed point can be outside of the curve 's bounds.
85   Standard_EXPORT CPnts_AbscissaPoint(const Adaptor2d_Curve2d& C, const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Resolution);
86 
87   //! the algorithm computes a point on a curve <Curve> at the
88   //! distance <Abscissa> from the point of parameter <U0>.
89   //! <Ui> is the starting value used in the iterative process
90   //! which find the solution, it must be closed to the final
91   //! solution
92   //! <Resolution> is the error allowed in the computation.
93   //! The computed point can be outside of the curve 's bounds.
94   Standard_EXPORT CPnts_AbscissaPoint(const Adaptor3d_Curve& C, const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Ui, const Standard_Real Resolution);
95 
96   //! the algorithm computes a point on a curve <Curve> at the
97   //! distance <Abscissa> from the point of parameter <U0>.
98   //! <Ui> is the starting value used in the iterative process
99   //! which find the solution, it must be closed to the final
100   //! solution
101   //! <Resolution> is the error allowed in the computation.
102   //! The computed point can be outside of the curve 's bounds.
103   Standard_EXPORT CPnts_AbscissaPoint(const Adaptor2d_Curve2d& C, const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Ui, const Standard_Real Resolution);
104 
105   //! Initializes the resolution function with <C>.
106   Standard_EXPORT void Init (const Adaptor3d_Curve& C);
107 
108   //! Initializes the resolution function with <C>.
109   Standard_EXPORT void Init (const Adaptor2d_Curve2d& C);
110 
111   //! Initializes the resolution function with <C>.
112   Standard_EXPORT void Init (const Adaptor3d_Curve& C, const Standard_Real Tol);
113 
114   //! Initializes the resolution function with <C>.
115   Standard_EXPORT void Init (const Adaptor2d_Curve2d& C, const Standard_Real Tol);
116 
117   //! Initializes the resolution function with <C>
118   //! between U1 and U2.
119   Standard_EXPORT void Init (const Adaptor3d_Curve& C, const Standard_Real U1, const Standard_Real U2);
120 
121   //! Initializes the resolution function with <C>
122   //! between U1 and U2.
123   Standard_EXPORT void Init (const Adaptor2d_Curve2d& C, const Standard_Real U1, const Standard_Real U2);
124 
125   //! Initializes the resolution function with <C>
126   //! between U1 and U2.
127   Standard_EXPORT void Init (const Adaptor3d_Curve& C, const Standard_Real U1, const Standard_Real U2, const Standard_Real Tol);
128 
129   //! Initializes the resolution function with <C>
130   //! between U1 and U2.
131   Standard_EXPORT void Init (const Adaptor2d_Curve2d& C, const Standard_Real U1, const Standard_Real U2, const Standard_Real Tol);
132 
133   //! Computes the point at the distance <Abscissa> of
134   //! the curve.
135   //! U0 is the parameter of the point from which the distance
136   //! is measured.
137   Standard_EXPORT void Perform (const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Resolution);
138 
139   //! Computes the point at the distance <Abscissa> of
140   //! the curve.
141   //! U0 is the parameter of the point from which the distance
142   //! is measured and Ui is the starting value for the iterative
143   //! process (should be close to the final solution).
144   Standard_EXPORT void Perform (const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Ui, const Standard_Real Resolution);
145 
146   //! Computes the point at the distance <Abscissa> of
147   //! the curve; performs more appropriate tolerance managment;
148   //! to use this method in right way it is necessary to call
149   //! empty consructor. then call method Init with
150   //! Tolerance = Resolution, then call AdvPermorm.
151   //! U0 is the parameter of the point from which the distance
152   //! is measured and Ui is the starting value for the iterative
153   //! process (should be close to the final solution).
154   Standard_EXPORT void AdvPerform (const Standard_Real Abscissa, const Standard_Real U0, const Standard_Real Ui, const Standard_Real Resolution);
155 
156   //! True if the computation was successful, False otherwise.
157     Standard_Boolean IsDone() const;
158 
159   //! Returns the parameter of the solution.
160     Standard_Real Parameter() const;
161 
162   //! Enforce the solution, used by GCPnts.
163     void SetParameter (const Standard_Real P);
164 
165 
166 
167 
168 protected:
169 
170 
171 
172 
173 
174 private:
175 
176 
177 
178   Standard_Boolean myDone;
179   Standard_Real myL;
180   Standard_Real myParam;
181   Standard_Real myUMin;
182   Standard_Real myUMax;
183   CPnts_MyRootFunction myF;
184 
185 
186 };
187 
188 
189 #include <CPnts_AbscissaPoint.lxx>
190 
191 
192 
193 
194 
195 #endif // _CPnts_AbscissaPoint_HeaderFile
196