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1 | // Copyright (c) 1995-1999 Matra Datavision |
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2 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
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3 | // |
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4 | // This file is part of Open CASCADE Technology software library. |
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5 | // |
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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 |
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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. |
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11 | // |
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12 | // Alternatively, this file may be used under the terms of Open CASCADE |
13 | // commercial license or contractual agreement. |
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14 | |
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15 | |
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16 | #include <ElCLib.hxx> |
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17 | #include <GccAna_Circ2d3Tan.hxx> |
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18 | #include <GccAna_CircLin2dBisec.hxx> |
19 | #include <GccAna_Lin2dBisec.hxx> |
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20 | #include <GccEnt_BadQualifier.hxx> |
21 | #include <GccEnt_QualifiedCirc.hxx> |
22 | #include <GccEnt_QualifiedLin.hxx> |
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23 | #include <GccInt_BLine.hxx> |
24 | #include <GccInt_BParab.hxx> |
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25 | #include <GccInt_IType.hxx> |
26 | #include <gp_Circ2d.hxx> |
27 | #include <gp_Dir2d.hxx> |
28 | #include <gp_Lin2d.hxx> |
29 | #include <gp_Pnt2d.hxx> |
30 | #include <IntAna2d_AnaIntersection.hxx> |
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31 | #include <IntAna2d_Conic.hxx> |
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32 | #include <IntAna2d_IntPoint.hxx> |
33 | #include <Standard_OutOfRange.hxx> |
34 | #include <StdFail_NotDone.hxx> |
35 | #include <TColStd_Array1OfReal.hxx> |
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36 | |
37 | //========================================================================= |
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38 | // Creation of a circle tangent to a circle and two straight lines. + |
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39 | //========================================================================= |
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40 | GccAna_Circ2d3Tan::GccAna_Circ2d3Tan (const GccEnt_QualifiedCirc& Qualified1 , |
41 | const GccEnt_QualifiedLin& Qualified2 , |
42 | const GccEnt_QualifiedLin& Qualified3 , |
43 | const Standard_Real Tolerance ) |
44 | |
45 | //========================================================================= |
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46 | // Initialisation of fields. + |
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47 | //========================================================================= |
48 | |
49 | :cirsol(1,8) , |
50 | qualifier1(1,8) , |
51 | qualifier2(1,8) , |
52 | qualifier3(1,8) , |
53 | TheSame1(1,8) , |
54 | TheSame2(1,8) , |
55 | TheSame3(1,8) , |
56 | pnttg1sol(1,8) , |
57 | pnttg2sol(1,8) , |
58 | pnttg3sol(1,8) , |
59 | par1sol(1,8) , |
60 | par2sol(1,8) , |
61 | par3sol(1,8) , |
62 | pararg1(1,8) , |
63 | pararg2(1,8) , |
64 | pararg3(1,8) |
65 | { |
66 | |
67 | TheSame1.Init(0); |
68 | |
69 | gp_Dir2d dirx(1.0,0.0); |
70 | Standard_Real Tol = Abs(Tolerance); |
71 | WellDone = Standard_False; |
72 | NbrSol = 0; |
73 | if (!(Qualified1.IsEnclosed() || Qualified1.IsEnclosing() || |
74 | Qualified1.IsOutside() || Qualified1.IsUnqualified()) || |
75 | !(Qualified2.IsEnclosed() || |
76 | Qualified2.IsOutside() || Qualified2.IsUnqualified()) || |
77 | !(Qualified3.IsEnclosed() || |
78 | Qualified3.IsOutside() || Qualified3.IsUnqualified())) { |
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79 | throw GccEnt_BadQualifier(); |
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80 | return; |
81 | } |
82 | |
83 | //========================================================================= |
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84 | // Processing. + |
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85 | //========================================================================= |
86 | |
87 | gp_Circ2d C1 = Qualified1.Qualified(); |
88 | gp_Lin2d L2 = Qualified2.Qualified(); |
89 | gp_Lin2d L3 = Qualified3.Qualified(); |
90 | Standard_Real R1 = C1.Radius(); |
91 | gp_Pnt2d center1(C1.Location()); |
92 | gp_Pnt2d origin2(L2.Location()); |
93 | gp_Dir2d dir2(L2.Direction()); |
94 | gp_Dir2d normL2(-dir2.Y(),dir2.X()); |
95 | gp_Pnt2d origin3(L3.Location()); |
96 | gp_Dir2d dir3(L3.Direction()); |
97 | gp_Dir2d normL3(-dir3.Y(),dir3.X()); |
98 | |
99 | TColStd_Array1OfReal Radius(1,2); |
100 | GccAna_CircLin2dBisec Bis1(C1,L2); |
101 | GccAna_Lin2dBisec Bis2(L2,L3); |
102 | if (Bis1.IsDone() && Bis2.IsDone()) { |
103 | Standard_Integer nbsolution1 = Bis1.NbSolutions(); |
104 | Standard_Integer nbsolution2 = Bis2.NbSolutions(); |
105 | for (Standard_Integer i = 1 ; i <= nbsolution1; i++) { |
106 | Handle(GccInt_Bisec) Sol1 = Bis1.ThisSolution(i); |
107 | GccInt_IType typ1 = Sol1->ArcType(); |
108 | IntAna2d_AnaIntersection Intp; |
109 | for (Standard_Integer k = 1 ; k <= nbsolution2; k++) { |
110 | if (typ1 == GccInt_Lin) { |
111 | Intp.Perform(Sol1->Line(),Bis2.ThisSolution(k)); |
112 | } |
113 | else if (typ1 == GccInt_Par) { |
114 | Intp.Perform(Bis2.ThisSolution(k),IntAna2d_Conic(Sol1->Parabola())); |
115 | } |
116 | if (Intp.IsDone()) { |
117 | if ((!Intp.IsEmpty())&&(!Intp.ParallelElements())&& |
118 | (!Intp.IdenticalElements())) { |
119 | for (Standard_Integer j = 1 ; j <= Intp.NbPoints() ; j++) { |
120 | gp_Pnt2d Center(Intp.Point(j).Value()); |
121 | Standard_Real dist1 = Center.Distance(center1); |
122 | Standard_Real dist2 = L2.Distance(Center); |
123 | Standard_Real dist3 = L3.Distance(Center); |
124 | Standard_Integer nbsol1 = 0; |
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125 | Standard_Integer nbsol3 = 0; |
126 | Standard_Boolean ok = Standard_False; |
127 | if (Qualified1.IsEnclosed()) { |
128 | if (dist1-R1 < Tolerance) { |
129 | Radius(1) = Abs(R1-dist1); |
130 | nbsol1 = 1; |
131 | ok = Standard_True; |
132 | } |
133 | } |
134 | else if (Qualified1.IsOutside()) { |
135 | if (R1-dist1 < Tolerance) { |
136 | Radius(1) = Abs(R1-dist1); |
137 | nbsol1 = 1; |
138 | ok = Standard_True; |
139 | } |
140 | } |
141 | else if (Qualified1.IsEnclosing()) { |
142 | ok = Standard_True; |
143 | nbsol1 = 1; |
144 | Radius(1) = Abs(R1-dist1); |
145 | } |
146 | else if (Qualified1.IsUnqualified()) { |
147 | ok = Standard_True; |
148 | nbsol1 = 2; |
149 | Radius(1) = Abs(R1-dist1); |
150 | Radius(2) = R1+dist1; |
151 | } |
152 | if (Qualified2.IsEnclosed() && ok) { |
153 | if ((((origin2.X()-Center.X())*(-dir2.Y()))+ |
154 | ((origin2.Y()-Center.Y())*(dir2.X())))<=0){ |
155 | for (Standard_Integer ii = 1 ; ii <= nbsol1 ; ii++) { |
156 | if (Abs(dist2-Radius(ii)) < Tol) { |
157 | ok = Standard_True; |
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158 | Radius(1) = Radius(ii); |
159 | } |
160 | } |
161 | } |
162 | } |
163 | else if (Qualified2.IsOutside() && ok) { |
164 | if ((((origin2.X()-Center.X())*(-dir2.Y()))+ |
165 | ((origin2.Y()-Center.Y())*(dir2.X())))>=0){ |
166 | for (Standard_Integer ii = 1 ; ii <= nbsol1 ; ii++) { |
167 | if (Abs(dist2-Radius(ii)) < Tol) { |
168 | ok = Standard_True; |
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169 | Radius(1) = Radius(ii); |
170 | } |
171 | } |
172 | } |
173 | } |
174 | else if (Qualified2.IsUnqualified() && ok) { |
175 | for (Standard_Integer ii = 1 ; ii <= nbsol1 ; ii++) { |
176 | if (Abs(dist2-Radius(ii)) < Tol) { |
177 | ok = Standard_True; |
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178 | Radius(1) = Radius(ii); |
179 | } |
180 | } |
181 | } |
182 | if (Qualified3.IsEnclosed() && ok) { |
183 | if ((((origin3.X()-Center.X())*(-dir3.Y()))+ |
184 | ((origin3.Y()-Center.Y())*(dir3.X())))<=0){ |
185 | if (Abs(dist3-Radius(1)) < Tol) { |
186 | ok = Standard_True; |
187 | nbsol3 = 1; |
188 | } |
189 | } |
190 | } |
191 | else if (Qualified3.IsOutside() && ok) { |
192 | if ((((origin3.X()-Center.X())*(-dir3.Y()))+ |
193 | ((origin3.Y()-Center.Y())*(dir3.X())))>=0){ |
194 | if (Abs(dist3-Radius(1)) < Tol) { |
195 | ok = Standard_True; |
196 | nbsol3 = 1; |
197 | } |
198 | } |
199 | } |
200 | else if (Qualified3.IsUnqualified() && ok) { |
201 | if (Abs(dist3-Radius(1)) < Tol) { |
202 | ok = Standard_True; |
203 | nbsol3 = 1; |
204 | } |
205 | } |
206 | if (ok) { |
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207 | for (Standard_Integer m = 1 ; m <= nbsol3 ; m++) { |
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208 | NbrSol++; |
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209 | cirsol(NbrSol) = gp_Circ2d(gp_Ax2d(Center,dirx),Radius(m)); |
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210 | // ========================================================== |
211 | Standard_Real distcc1 = Center.Distance(center1); |
212 | if (!Qualified1.IsUnqualified()) { |
213 | qualifier1(NbrSol) = Qualified1.Qualifier(); |
214 | } |
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215 | else if (Abs(distcc1+Radius(m)-R1) < Tol) { |
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216 | qualifier1(NbrSol) = GccEnt_enclosed; |
217 | } |
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218 | else if (Abs(distcc1-R1-Radius(m)) < Tol) { |
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219 | qualifier1(NbrSol) = GccEnt_outside; |
220 | } |
221 | else { qualifier1(NbrSol) = GccEnt_enclosing; } |
222 | gp_Dir2d dc2(origin2.XY()-Center.XY()); |
223 | if (!Qualified2.IsUnqualified()) { |
224 | qualifier2(NbrSol) = Qualified2.Qualifier(); |
225 | } |
226 | else if (dc2.Dot(normL2) > 0.0) { |
227 | qualifier2(NbrSol) = GccEnt_outside; |
228 | } |
229 | else { qualifier2(NbrSol) = GccEnt_enclosed; } |
230 | gp_Dir2d dc3(origin3.XY()-Center.XY()); |
231 | if (!Qualified3.IsUnqualified()) { |
232 | qualifier3(NbrSol) = Qualified3.Qualifier(); |
233 | } |
234 | else if (dc3.Dot(normL3) > 0.0) { |
235 | qualifier3(NbrSol) = GccEnt_outside; |
236 | } |
237 | else { qualifier3(NbrSol) = GccEnt_enclosed; } |
238 | if (Center.Distance(center1) <= Tolerance && |
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239 | Abs(Radius(m)-R1) <= Tolerance) { |
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240 | TheSame1(NbrSol) = 1; |
241 | } |
242 | else { |
243 | TheSame1(NbrSol) = 0; |
244 | gp_Dir2d dc(center1.XY()-Center.XY()); |
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245 | pnttg1sol(NbrSol)=gp_Pnt2d(Center.XY()+Radius(m)*dc.XY()); |
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246 | par1sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol), |
247 | pnttg1sol(NbrSol)); |
248 | pararg1(NbrSol)=ElCLib::Parameter(C1,pnttg1sol(NbrSol)); |
249 | } |
250 | TheSame2(NbrSol) = 0; |
251 | TheSame3(NbrSol) = 0; |
252 | gp_Dir2d dc(origin2.XY()-Center.XY()); |
253 | Standard_Real sign = dc.Dot(gp_Dir2d(-dir2.Y(),dir2.X())); |
254 | dc = gp_Dir2d(sign*gp_XY(-dir2.Y(),dir2.X())); |
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255 | pnttg2sol(NbrSol) = gp_Pnt2d(Center.XY()+Radius(m)*dc.XY()); |
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256 | par2sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol), |
257 | pnttg2sol(NbrSol)); |
258 | pararg2(NbrSol)=ElCLib::Parameter(L2,pnttg2sol(NbrSol)); |
259 | dc = gp_Dir2d(origin3.XY()-Center.XY()); |
260 | sign = dc.Dot(gp_Dir2d(-dir3.Y(),dir3.X())); |
261 | dc = gp_Dir2d(sign*gp_XY(-dir3.Y(),dir3.X())); |
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262 | pnttg3sol(NbrSol) = gp_Pnt2d(Center.XY()+Radius(m)*dc.XY()); |
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263 | par3sol(NbrSol)=ElCLib::Parameter(cirsol(NbrSol), |
264 | pnttg3sol(NbrSol)); |
265 | pararg3(NbrSol)=ElCLib::Parameter(L3,pnttg3sol(NbrSol)); |
266 | } |
267 | } |
268 | } |
269 | } |
270 | WellDone = Standard_True; |
271 | } |
272 | } |
273 | } |
274 | } |
275 | } |
276 | |
277 | |