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1 | // Created on: 1993-08-24 |
2 | // Created by: Bruno DUMORTIER |
3 | // Copyright (c) 1993-1999 Matra Datavision |
4 | // Copyright (c) 1999-2012 OPEN CASCADE SAS |
5 | // |
6 | // The content of this file is subject to the Open CASCADE Technology Public |
7 | // License Version 6.5 (the "License"). You may not use the content of this file |
8 | // except in compliance with the License. Please obtain a copy of the License |
9 | // at http://www.opencascade.org and read it completely before using this file. |
10 | // |
11 | // The Initial Developer of the Original Code is Open CASCADE S.A.S., having its |
12 | // main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France. |
13 | // |
14 | // The Original Code and all software distributed under the License is |
15 | // distributed on an "AS IS" basis, without warranty of any kind, and the |
16 | // Initial Developer hereby disclaims all such warranties, including without |
17 | // limitation, any warranties of merchantability, fitness for a particular |
18 | // purpose or non-infringement. Please see the License for the specific terms |
19 | // and conditions governing the rights and limitations under the License. |
20 | |
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21 | |
22 | |
23 | |
24 | #include <ProjLib_Cone.ixx> |
25 | |
26 | #include <Precision.hxx> |
27 | #include <gp.hxx> |
28 | #include <gp_Vec.hxx> |
29 | #include <gp_Trsf.hxx> |
30 | #include <gp_Vec2d.hxx> |
31 | #include <ElSLib.hxx> |
32 | |
33 | //======================================================================= |
34 | //function : ProjLib_Cone |
35 | //purpose : |
36 | //======================================================================= |
37 | |
38 | ProjLib_Cone::ProjLib_Cone() |
39 | { |
40 | } |
41 | |
42 | |
43 | //======================================================================= |
44 | //function : ProjLib_Cone |
45 | //purpose : |
46 | //======================================================================= |
47 | |
48 | ProjLib_Cone::ProjLib_Cone(const gp_Cone& Co) |
49 | { |
50 | Init(Co); |
51 | } |
52 | |
53 | |
54 | //======================================================================= |
55 | //function : ProjLib_Cone |
56 | //purpose : |
57 | //======================================================================= |
58 | |
59 | ProjLib_Cone::ProjLib_Cone(const gp_Cone& Co, const gp_Lin& L) |
60 | { |
61 | Init(Co); |
62 | Project(L); |
63 | } |
64 | |
65 | |
66 | //======================================================================= |
67 | //function : ProjLib_Cone |
68 | //purpose : |
69 | //======================================================================= |
70 | |
71 | ProjLib_Cone::ProjLib_Cone(const gp_Cone& Co, const gp_Circ& C) |
72 | { |
73 | Init(Co); |
74 | Project(C); |
75 | } |
76 | |
77 | |
78 | //======================================================================= |
79 | //function : Init |
80 | //purpose : |
81 | //======================================================================= |
82 | |
83 | void ProjLib_Cone::Init(const gp_Cone& Co) |
84 | { |
85 | myType = GeomAbs_OtherCurve; |
86 | myCone = Co; |
87 | myIsPeriodic = Standard_False; |
88 | isDone = Standard_False; |
89 | } |
90 | |
91 | |
92 | //======================================================================= |
93 | //function : EvalPnt2d / EvalDir2d |
94 | //purpose : returns the Projected Pnt / Dir in the parametrization range |
95 | // of myPlane. |
96 | //======================================================================= |
97 | |
98 | #ifdef DEB |
99 | static gp_Pnt2d EvalPnt2d( const gp_Pnt& P, const gp_Cone& C) |
100 | { |
101 | gp_Vec OP( C.Location(),P); |
102 | Standard_Real X = OP.Dot(gp_Vec(C.Position().XDirection())); |
103 | Standard_Real Y = OP.Dot(gp_Vec(C.Position().YDirection())); |
104 | Standard_Real Z = OP.Dot(gp_Vec(C.Position().Direction())); |
105 | Standard_Real U,V; |
106 | |
107 | if ( Abs(X) > Precision::PConfusion() || |
108 | Abs(Y) > Precision::PConfusion() ) { |
109 | U = ATan2(Y,X); |
110 | } |
111 | else { |
112 | U = 0.; |
113 | } |
114 | |
115 | V = Z / Cos(C.SemiAngle()); |
116 | |
117 | return gp_Pnt2d( U, Z); |
118 | } |
119 | #endif |
120 | |
121 | //======================================================================= |
122 | //function : Project |
123 | //purpose : |
124 | //======================================================================= |
125 | |
126 | void ProjLib_Cone::Project(const gp_Lin& L) |
127 | { |
128 | |
129 | Standard_Real U,V; |
130 | |
131 | // Compute V |
132 | V = gp_Vec(myCone.Location(),L.Location()) |
133 | .Dot(gp_Vec(myCone.Position().Direction())); |
134 | V /= Cos( myCone.SemiAngle()); |
135 | |
136 | // Compute U |
137 | gp_Ax3 CPos = myCone.Position(); |
138 | gp_Dir ZCone = CPos.XDirection() ^ CPos.YDirection(); |
139 | |
140 | gp_Ax3 RightHanded(CPos.Location(), ZCone, CPos.XDirection()); |
141 | gp_Trsf T; |
142 | T.SetTransformation(RightHanded); |
143 | |
144 | gp_Dir D = L.Position().Direction(); |
145 | D.Transform(T); |
146 | |
147 | if ( D.Z() < 0.) D.Reverse(); |
148 | D.SetCoord(3, 0.); |
149 | U = gp::DX().AngleWithRef( D, gp::DZ()); |
150 | |
151 | Standard_Integer a1 = |
152 | (ZCone.IsEqual(CPos.Direction(), Precision::Angular())) ? 1 : -1; |
153 | Standard_Integer a2 = |
154 | (myCone.SemiAngle() > 0) ? 1 : -1; |
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155 | if ( ( a1 * a2) == -1) U -= M_PI; |
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156 | |
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157 | if ( U < 0.) U += 2.*M_PI; |
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158 | |
159 | gp_Pnt P; |
160 | gp_Vec Vu, Vv; |
161 | |
162 | ElSLib::ConeD1(U, V, CPos, myCone.RefRadius(), myCone.SemiAngle(), |
163 | P, Vu, Vv); |
164 | |
165 | if(Vv.IsParallel(gp_Vec(L.Position().Direction()), Precision::Angular())) { |
166 | |
167 | myType = GeomAbs_Line; |
168 | |
169 | gp_Pnt2d P2d(U,V); |
170 | |
171 | Standard_Real Signe = L.Direction().Dot(myCone.Position().Direction()); |
172 | Signe = (Signe > 0.) ? 1. : -1.; |
173 | gp_Dir2d D2d(0., Signe); |
174 | |
175 | myLin = gp_Lin2d( P2d, D2d); |
176 | |
177 | isDone = Standard_True; |
178 | } |
179 | |
180 | } |
181 | |
182 | |
183 | //======================================================================= |
184 | //function : Project |
185 | //purpose : |
186 | //======================================================================= |
187 | |
188 | void ProjLib_Cone::Project(const gp_Circ& C) |
189 | { |
190 | myType = GeomAbs_Line; |
191 | |
192 | gp_Ax3 ConePos = myCone.Position(); |
193 | gp_Ax3 CircPos = C.Position(); |
194 | |
195 | gp_Dir ZCone = ConePos.XDirection().Crossed(ConePos.YDirection()); |
196 | gp_Dir ZCir = CircPos.XDirection().Crossed(CircPos.YDirection()); |
197 | |
198 | Standard_Real U, V; |
199 | Standard_Real x = ConePos.XDirection().Dot(CircPos.XDirection()); |
200 | Standard_Real y = ConePos.YDirection().Dot(CircPos.XDirection()); |
201 | Standard_Real z |
202 | = gp_Vec(myCone.Location(),C.Location()).Dot(ConePos.Direction()); |
203 | |
204 | // pour trouver le point U V, on reprend le code de ElSLib |
205 | // sans appliquer la Trsf au point ( aller retour inutile). |
206 | if ( x == 0.0 && y == 0.0 ) { |
207 | U = 0.; |
208 | } |
209 | else if ( -myCone.RefRadius() > z * Tan(myCone.SemiAngle())) { |
210 | U = ATan2(-y, -x); |
211 | } |
212 | else { |
213 | U = ATan2( y, x); |
214 | } |
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215 | if ( U < 0.) U += 2*M_PI; |
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216 | |
217 | V = z / Cos(myCone.SemiAngle()); |
218 | |
219 | gp_Pnt2d P2d1 (U, V); |
220 | gp_Dir2d D2d; |
221 | if ( ZCone.Dot(ZCir) > 0.) |
222 | D2d.SetCoord(1., 0.); |
223 | else |
224 | D2d.SetCoord(-1., 0.); |
225 | |
226 | myLin = gp_Lin2d(P2d1, D2d); |
227 | isDone = Standard_True; |
228 | } |
229 | |
230 | void ProjLib_Cone::Project(const gp_Elips& E) |
231 | { |
232 | ProjLib_Projector::Project(E); |
233 | } |
234 | |
235 | void ProjLib_Cone::Project(const gp_Parab& P) |
236 | { |
237 | ProjLib_Projector::Project(P); |
238 | } |
239 | |
240 | void ProjLib_Cone::Project(const gp_Hypr& H) |
241 | { |
242 | ProjLib_Projector::Project(H); |
243 | } |
244 | |