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1 | // Created on: 1995-10-25 |
2 | // Created by: Bruno DUMORTIER |
3 | // Copyright (c) 1995-1999 Matra Datavision |
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4 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
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5 | // |
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6 | // This file is part of Open CASCADE Technology software library. |
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7 | // |
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8 | // This library is free software; you can redistribute it and / or modify it |
9 | // under the terms of the GNU Lesser General Public 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. |
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13 | // |
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14 | // Alternatively, this file may be used under the terms of Open CASCADE |
15 | // commercial license or contractual agreement. |
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16 | |
17 | #include <BRepOffset.ixx> |
18 | |
19 | #include <Geom_Plane.hxx> |
20 | #include <Geom_CylindricalSurface.hxx> |
21 | #include <Geom_ConicalSurface.hxx> |
22 | #include <Geom_SphericalSurface.hxx> |
23 | #include <Geom_ToroidalSurface.hxx> |
24 | #include <Geom_SurfaceOfRevolution.hxx> |
25 | #include <Geom_SurfaceOfLinearExtrusion.hxx> |
26 | #include <Geom_BSplineSurface.hxx> |
27 | #include <Geom_RectangularTrimmedSurface.hxx> |
28 | #include <Geom_OffsetSurface.hxx> |
29 | |
30 | #include <gp_Vec.hxx> |
31 | #include <gp_Dir.hxx> |
32 | #include <gp_Ax3.hxx> |
33 | #include <gp_Ax1.hxx> |
34 | |
35 | #include <Precision.hxx> |
36 | |
37 | //======================================================================= |
38 | //function : Surface |
39 | //purpose : |
40 | //======================================================================= |
41 | |
42 | Handle(Geom_Surface) BRepOffset::Surface(const Handle(Geom_Surface)& Surface, |
43 | const Standard_Real Offset, |
44 | BRepOffset_Status& Status) |
45 | { |
46 | Standard_Real Tol = Precision::Confusion(); |
47 | |
48 | Status = BRepOffset_Good; |
49 | Handle(Geom_Surface) Result; |
50 | |
51 | Handle(Standard_Type) TheType = Surface->DynamicType(); |
52 | |
53 | if (TheType == STANDARD_TYPE(Geom_Plane)) { |
54 | Handle(Geom_Plane) P = |
55 | Handle(Geom_Plane)::DownCast(Surface); |
56 | gp_Vec T = P->Position().XDirection()^P->Position().YDirection(); |
57 | T *= Offset; |
58 | Result = Handle(Geom_Plane)::DownCast(P->Translated(T)); |
59 | } |
60 | else if (TheType == STANDARD_TYPE(Geom_CylindricalSurface)) { |
61 | Handle(Geom_CylindricalSurface) C = |
62 | Handle(Geom_CylindricalSurface)::DownCast(Surface); |
63 | Standard_Real Radius = C->Radius(); |
64 | gp_Ax3 Axis = C->Position(); |
65 | if (Axis.Direct()) |
66 | Radius += Offset; |
67 | else |
68 | Radius -= Offset; |
69 | if ( Radius >= Tol ) { |
70 | Result = new Geom_CylindricalSurface( Axis, Radius); |
71 | } |
72 | else if ( Radius <= -Tol ){ |
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73 | Axis.Rotate(gp_Ax1(Axis.Location(),Axis.Direction()),M_PI); |
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74 | Result = new Geom_CylindricalSurface( Axis, Abs(Radius)); |
75 | Status = BRepOffset_Reversed; |
76 | } |
77 | else { |
78 | Status = BRepOffset_Degenerated; |
79 | } |
80 | } |
81 | else if (TheType == STANDARD_TYPE(Geom_ConicalSurface)) { |
82 | Handle(Geom_ConicalSurface) C = |
83 | Handle(Geom_ConicalSurface)::DownCast(Surface); |
84 | Standard_Real Alpha = C->SemiAngle(); |
85 | Standard_Real Radius = C->RefRadius() + Offset * Cos(Alpha); |
86 | gp_Ax3 Axis = C->Position(); |
87 | if ( Radius >= 0.) { |
88 | gp_Vec Z( Axis.Direction()); |
89 | Z *= - Offset * Sin(Alpha); |
90 | Axis.Translate(Z); |
91 | } |
92 | else { |
93 | Radius = -Radius; |
94 | gp_Vec Z( Axis.Direction()); |
95 | Z *= - Offset * Sin(Alpha); |
96 | Axis.Translate(Z); |
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97 | Axis.Rotate(gp_Ax1(Axis.Location(),Axis.Direction()),M_PI); |
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98 | Alpha = -Alpha; |
99 | } |
100 | Result = new Geom_ConicalSurface(Axis, Alpha, Radius); |
101 | } |
102 | else if (TheType == STANDARD_TYPE(Geom_SphericalSurface)) { |
103 | Handle(Geom_SphericalSurface) S = |
104 | Handle(Geom_SphericalSurface)::DownCast(Surface); |
105 | Standard_Real Radius = S->Radius(); |
106 | gp_Ax3 Axis = S->Position(); |
107 | if (Axis.Direct()) |
108 | Radius += Offset; |
109 | else |
110 | Radius -= Offset; |
111 | if ( Radius >= Tol) { |
112 | Result = new Geom_SphericalSurface(Axis, Radius); |
113 | } |
114 | else if ( Radius <= -Tol ) { |
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115 | Axis.Rotate(gp_Ax1(Axis.Location(),Axis.Direction()),M_PI); |
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116 | Axis.ZReverse(); |
117 | Result = new Geom_SphericalSurface(Axis, -Radius); |
118 | Status = BRepOffset_Reversed; |
119 | } |
120 | else { |
121 | Status = BRepOffset_Degenerated; |
122 | } |
123 | } |
124 | else if (TheType == STANDARD_TYPE(Geom_ToroidalSurface)) { |
125 | Handle(Geom_ToroidalSurface) S = |
126 | Handle(Geom_ToroidalSurface)::DownCast(Surface); |
127 | Standard_Real MajorRadius = S->MajorRadius(); |
128 | Standard_Real MinorRadius = S->MinorRadius(); |
129 | gp_Ax3 Axis = S->Position(); |
130 | if (MinorRadius < MajorRadius) { // A FINIR |
131 | if (Axis.Direct()) |
132 | MinorRadius += Offset; |
133 | else |
134 | MinorRadius -= Offset; |
135 | if (MinorRadius >= Tol) { |
136 | Result = new Geom_ToroidalSurface(Axis,MajorRadius,MinorRadius); |
137 | } |
138 | else if (MinorRadius <= -Tol) { |
139 | Status = BRepOffset_Reversed; |
140 | } |
141 | else { |
142 | Status = BRepOffset_Degenerated; |
143 | } |
144 | } |
145 | } |
146 | else if (TheType == STANDARD_TYPE(Geom_SurfaceOfRevolution)) { |
147 | } |
148 | else if (TheType == STANDARD_TYPE(Geom_SurfaceOfLinearExtrusion)) { |
149 | } |
150 | else if (TheType == STANDARD_TYPE(Geom_BSplineSurface)) { |
151 | } |
152 | else if (TheType == STANDARD_TYPE(Geom_RectangularTrimmedSurface)) { |
153 | Handle(Geom_RectangularTrimmedSurface) S = |
154 | Handle(Geom_RectangularTrimmedSurface)::DownCast(Surface); |
155 | Standard_Real U1,U2,V1,V2; |
156 | S->Bounds(U1,U2,V1,V2); |
157 | Handle(Geom_Surface) Off = |
158 | BRepOffset::Surface(S->BasisSurface(),Offset,Status); |
159 | Result = new Geom_RectangularTrimmedSurface (Off,U1,U2,V1,V2); |
160 | } |
161 | else if (TheType == STANDARD_TYPE(Geom_OffsetSurface)) { |
162 | } |
163 | |
164 | if ( Result.IsNull()) { |
165 | Result = new Geom_OffsetSurface( Surface, Offset); |
166 | } |
167 | |
168 | return Result; |
169 | } |
170 | |
171 | |