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b311480e | 1 | // Copyright (c) 1995-1999 Matra Datavision |
973c2be1 | 2 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
b311480e | 3 | // |
973c2be1 | 4 | // This file is part of Open CASCADE Technology software library. |
b311480e | 5 | // |
d5f74e42 | 6 | // This library is free software; you can redistribute it and/or modify it under |
7 | // the terms of the GNU Lesser General Public License version 2.1 as published | |
973c2be1 | 8 | // by the Free Software Foundation, with special exception defined in the file |
9 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT | |
10 | // distribution for complete text of the license and disclaimer of any warranty. | |
b311480e | 11 | // |
973c2be1 | 12 | // Alternatively, this file may be used under the terms of Open CASCADE |
13 | // commercial license or contractual agreement. | |
7fd59977 | 14 | |
15 | //========================================================================= | |
0d969553 Y |
16 | // CREATION of a STRAIGHT LINE TANGENT to a CIRCLE or PASSING by a POINT + |
17 | // and MAKING ANGLE A with a STRAIGHT LINE. + | |
7fd59977 | 18 | //========================================================================= |
19 | ||
7fd59977 | 20 | #include <ElCLib.hxx> |
42cf5bc1 | 21 | #include <GccAna_Lin2dTanObl.hxx> |
22 | #include <GccEnt_BadQualifier.hxx> | |
23 | #include <GccEnt_QualifiedCirc.hxx> | |
24 | #include <gp_Circ2d.hxx> | |
7fd59977 | 25 | #include <gp_Dir2d.hxx> |
42cf5bc1 | 26 | #include <gp_Lin2d.hxx> |
27 | #include <gp_Pnt2d.hxx> | |
7fd59977 | 28 | #include <gp_Vec2d.hxx> |
42cf5bc1 | 29 | #include <gp_XY.hxx> |
7fd59977 | 30 | #include <IntAna2d_AnaIntersection.hxx> |
31 | #include <IntAna2d_IntPoint.hxx> | |
32 | #include <Standard_OutOfRange.hxx> | |
42cf5bc1 | 33 | #include <StdFail_NotDone.hxx> |
7fd59977 | 34 | |
35 | //========================================================================= | |
0d969553 Y |
36 | // Creation of a straight line passing by a point : ThePoint + |
37 | // making an angle : TheAngle + | |
38 | // with straight line : TheLine. + | |
39 | // Subject the straight line (ThePoint,TheLine.Location()) to a rotation + | |
40 | // by angle TheAngle ==> D1. + | |
41 | // create straight line passing through ThePoint of direction D1. + | |
7fd59977 | 42 | //========================================================================= |
7fd59977 | 43 | GccAna_Lin2dTanObl:: |
44 | GccAna_Lin2dTanObl (const gp_Pnt2d& ThePoint , | |
45 | const gp_Lin2d& TheLine , | |
46 | const Standard_Real TheAngle ): | |
47 | linsol(1,1) , | |
48 | qualifier1(1,1), | |
49 | pnttg1sol(1,1) , | |
50 | pntint2sol(1,1), | |
51 | par1sol(1,1) , | |
52 | par2sol(1,1) , | |
53 | pararg1(1,1) , | |
54 | pararg2(1,1) | |
55 | { | |
56 | ||
57 | Standard_Real Cosa = TheLine.Direction().X(); | |
58 | Standard_Real Sina = TheLine.Direction().Y(); | |
59 | linsol(1) = gp_Lin2d(ThePoint, | |
60 | // ============================== | |
61 | gp_Dir2d(Cosa*Cos(TheAngle)-Sina*Sin(TheAngle), | |
62 | // =============================================== | |
63 | Sina*Cos(TheAngle)+Sin(TheAngle)*Cosa)); | |
64 | // ======================================= | |
65 | qualifier1(1) = GccEnt_noqualifier; | |
66 | pnttg1sol(1) = ThePoint; | |
67 | IntAna2d_AnaIntersection Intp(linsol(1),TheLine); | |
68 | if (Intp.IsDone()) { | |
69 | if (!Intp.IsEmpty()) { | |
70 | for (Standard_Integer i = 1 ; i <= Intp.NbPoints() ; i++) { | |
71 | pntint2sol(1) = Intp.Point(i).Value(); | |
72 | } | |
73 | } | |
74 | par1sol(1)=ElCLib::Parameter(linsol(1),pnttg1sol(1)); | |
75 | par2sol(1)=ElCLib::Parameter(linsol(1),pntint2sol(1)); | |
76 | pararg1(1)=0.; | |
77 | pararg2(1)=ElCLib::Parameter(TheLine,pntint2sol(1)); | |
78 | NbrSol = 1; | |
79 | WellDone = Standard_True; | |
80 | } | |
81 | else { | |
82 | WellDone = Standard_False; | |
83 | NbrSol=0; | |
84 | } | |
85 | } | |
86 | ||
87 | //========================================================================= | |
0d969553 Y |
88 | // Creation of a straight line tangent to a circle : Qualified1 (C1) + |
89 | // making angle : TheAngle + | |
90 | // with a straight line : TheLine. + | |
91 | // Subject the straight line (C1.Location,TheLine.Location()) to a + | |
92 | // rotation by angle TheAngle or -TheAngle ==> D1. + | |
93 | // create the straight line passing by C1 of direction D1. + | |
7fd59977 | 94 | //========================================================================= |
95 | ||
96 | GccAna_Lin2dTanObl:: | |
97 | GccAna_Lin2dTanObl (const GccEnt_QualifiedCirc& Qualified1 , | |
98 | const gp_Lin2d& TheLine , | |
99 | const Standard_Real TheAngle ): | |
100 | linsol(1,2) , | |
101 | qualifier1(1,2) , | |
102 | pnttg1sol(1,2), | |
103 | pntint2sol(1,2), | |
104 | par1sol(1,2), | |
105 | par2sol(1,2), | |
106 | pararg1(1,2), | |
107 | pararg2(1,2) | |
108 | { | |
109 | ||
110 | WellDone = Standard_False; | |
111 | NbrSol = 0; | |
112 | if (!(Qualified1.IsEnclosed() || Qualified1.IsEnclosing() || | |
113 | Qualified1.IsOutside() || Qualified1.IsUnqualified())) { | |
9775fa61 | 114 | throw GccEnt_BadQualifier(); |
7fd59977 | 115 | return; |
116 | } | |
117 | Standard_Real Cosa = TheLine.Direction().X(); | |
118 | Standard_Real Sina = TheLine.Direction().Y(); | |
119 | if (Qualified1.IsEnclosed()) { | |
120 | // ============================ | |
9775fa61 | 121 | throw GccEnt_BadQualifier(); |
7fd59977 | 122 | } |
123 | else { | |
124 | gp_Circ2d C1 = Qualified1.Qualified(); | |
125 | Standard_Real R1 = C1.Radius(); | |
126 | if (Qualified1.IsEnclosing()) { | |
127 | // ============================= | |
128 | gp_XY xy(Cos(TheAngle)*Cosa-Sin(TheAngle)*Sina, | |
129 | Cos(TheAngle)*Sina+Sin(TheAngle)*Cosa); | |
130 | pnttg1sol(1) = gp_Pnt2d(C1.Location().XY()+R1*gp_XY(xy.Y(),-xy.X())); | |
131 | linsol(1) = gp_Lin2d(pnttg1sol(1),gp_Dir2d(xy)); | |
132 | // =============================================== | |
133 | qualifier1(1) = Qualified1.Qualifier(); | |
134 | IntAna2d_AnaIntersection Intp(linsol(1),TheLine); | |
135 | NbrSol = 1; | |
136 | WellDone = Standard_True; | |
137 | if (Intp.IsDone()) { | |
138 | if (!Intp.IsEmpty()) { | |
139 | for (Standard_Integer i = 1 ; i <= Intp.NbPoints() ; i++) { | |
140 | pntint2sol(1) = Intp.Point(i).Value(); | |
141 | } | |
142 | } | |
143 | } | |
144 | } | |
145 | else if (Qualified1.IsOutside()) { | |
146 | // ================================ | |
147 | gp_XY xy(Cos(TheAngle)*Cosa-Sin(TheAngle)*Sina, | |
148 | Cos(TheAngle)*Sina+Sin(TheAngle)*Cosa); | |
149 | pnttg1sol(1) = gp_Pnt2d(C1.Location().XY()+R1*gp_XY(-xy.Y(),xy.X())); | |
150 | linsol(1) = gp_Lin2d(pnttg1sol(1),gp_Dir2d(xy)); | |
151 | // =============================================== | |
152 | qualifier1(1) = Qualified1.Qualifier(); | |
153 | IntAna2d_AnaIntersection Intp(linsol(1),TheLine); | |
154 | WellDone = Standard_True; | |
155 | NbrSol = 1; | |
156 | if (Intp.IsDone()) { | |
157 | if (!Intp.IsEmpty()) { | |
158 | for (Standard_Integer i = 1 ; i <= Intp.NbPoints() ; i++) { | |
159 | pntint2sol(1) = Intp.Point(i).Value(); | |
160 | } | |
161 | } | |
162 | } | |
163 | } | |
164 | else if (Qualified1.IsUnqualified()) { | |
165 | // ==================================== | |
166 | gp_XY xy(Cos(TheAngle)*Cosa-Sin(TheAngle)*Sina, | |
167 | Cos(TheAngle)*Sina+Sin(TheAngle)*Cosa); | |
168 | pnttg1sol(1) = gp_Pnt2d(C1.Location().XY()+R1*gp_XY(xy.Y(),-xy.X())); | |
169 | linsol(1) = gp_Lin2d(pnttg1sol(1),gp_Dir2d(xy)); | |
170 | // =============================================== | |
171 | qualifier1(1) = GccEnt_enclosing; | |
172 | IntAna2d_AnaIntersection Intp(linsol(1),TheLine); | |
173 | WellDone = Standard_True; | |
174 | NbrSol=1; | |
175 | if (Intp.IsDone()) { | |
176 | if (!Intp.IsEmpty()) { | |
177 | for (Standard_Integer i = 1 ; i <= Intp.NbPoints() ; i++) { | |
178 | pntint2sol(1) = Intp.Point(i).Value(); | |
179 | } | |
180 | } | |
181 | } | |
182 | pnttg1sol(2) = gp_Pnt2d(C1.Location().XY()+R1*gp_XY(-xy.Y(),xy.X())); | |
183 | linsol(2) = gp_Lin2d(pnttg1sol(2),gp_Dir2d(xy)); | |
184 | // =============================================== | |
185 | qualifier1(2) = GccEnt_outside; | |
186 | Intp = IntAna2d_AnaIntersection(linsol(1),TheLine); | |
187 | NbrSol++; | |
188 | WellDone = Standard_True; | |
189 | if (Intp.IsDone()) { | |
190 | if (!Intp.IsEmpty()) { | |
191 | for (Standard_Integer i = 1 ; i <= Intp.NbPoints() ; i++) { | |
192 | pntint2sol(2) = Intp.Point(i).Value(); | |
193 | } | |
194 | } | |
195 | } | |
196 | } | |
197 | for (Standard_Integer index = 1; index <= NbrSol; index++) { | |
198 | par1sol(index)=ElCLib::Parameter(linsol(index),pnttg1sol(index)); | |
199 | pararg1(index)=ElCLib::Parameter(C1,pnttg1sol(index)); | |
200 | par2sol(index)=ElCLib::Parameter(linsol(index),pntint2sol(index)); | |
201 | pararg2(index)=ElCLib::Parameter(TheLine,pntint2sol(index)); | |
202 | } | |
203 | } | |
204 | } | |
205 | ||
206 | Standard_Boolean GccAna_Lin2dTanObl:: | |
207 | IsDone () const { return WellDone; } | |
208 | ||
209 | Standard_Integer GccAna_Lin2dTanObl:: | |
210 | NbSolutions () const | |
211 | { | |
9775fa61 | 212 | if (!WellDone) throw StdFail_NotDone(); |
7fd59977 | 213 | return NbrSol; |
214 | } | |
215 | ||
216 | gp_Lin2d GccAna_Lin2dTanObl:: | |
217 | ThisSolution (const Standard_Integer Index) const | |
218 | { | |
219 | if (!WellDone) | |
9775fa61 | 220 | throw StdFail_NotDone(); |
7fd59977 | 221 | if (Index <= 0 || Index > NbrSol) |
9775fa61 | 222 | throw Standard_OutOfRange(); |
7fd59977 | 223 | |
224 | return linsol(Index); | |
225 | } | |
226 | ||
227 | void GccAna_Lin2dTanObl:: | |
228 | WhichQualifier(const Standard_Integer Index , | |
229 | GccEnt_Position& Qualif1 ) const | |
230 | { | |
9775fa61 | 231 | if (!WellDone) { throw StdFail_NotDone(); } |
232 | else if (Index <= 0 ||Index > NbrSol) { throw Standard_OutOfRange(); } | |
7fd59977 | 233 | else { |
234 | Qualif1 = qualifier1(Index); | |
235 | } | |
236 | } | |
237 | ||
238 | void GccAna_Lin2dTanObl:: | |
239 | Tangency1 (const Standard_Integer Index, | |
240 | Standard_Real& ParSol, | |
241 | Standard_Real& ParArg, | |
242 | gp_Pnt2d& PntSol) const{ | |
9775fa61 | 243 | if (!WellDone) { throw StdFail_NotDone(); } |
244 | else if (Index <= 0 ||Index > NbrSol) { throw Standard_OutOfRange(); } | |
7fd59977 | 245 | else { |
246 | ParSol = par1sol(Index); | |
247 | ParArg = pararg1(Index); | |
248 | PntSol = gp_Pnt2d(pnttg1sol(Index)); | |
249 | } | |
250 | } | |
251 | ||
252 | void GccAna_Lin2dTanObl:: | |
253 | Intersection2 (const Standard_Integer Index, | |
254 | Standard_Real& ParSol, | |
255 | Standard_Real& ParArg, | |
256 | gp_Pnt2d& PntSol) const{ | |
9775fa61 | 257 | if (!WellDone) { throw StdFail_NotDone(); } |
258 | else if (Index <= 0 ||Index > NbrSol) { throw Standard_OutOfRange(); } | |
7fd59977 | 259 | else { |
260 | ParSol = par2sol(Index); | |
261 | ParArg = pararg2(Index); | |
262 | PntSol = gp_Pnt2d(pntint2sol(Index)); | |
263 | } | |
264 | } | |
265 | ||
266 |