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1 | // Created on: 2016-04-19 |
2 | // Copyright (c) 2016 OPEN CASCADE SAS |
3 | // Created by: Oleg AGASHIN |
4 | // |
5 | // This file is part of Open CASCADE Technology software library. |
6 | // |
7 | // This library is free software; you can redistribute it and/or modify it under |
8 | // the terms of the GNU Lesser General Public License version 2.1 as published |
9 | // by the Free Software Foundation, with special exception defined in the file |
10 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
11 | // distribution for complete text of the license and disclaimer of any warranty. |
12 | // |
13 | // Alternatively, this file may be used under the terms of Open CASCADE |
14 | // commercial license or contractual agreement. |
15 | |
16 | #include <BRepMesh_Deflection.hxx> |
17 | #include <BRepMesh_ShapeTool.hxx> |
18 | #include <IMeshTools_Parameters.hxx> |
19 | #include <IMeshData_Edge.hxx> |
20 | #include <IMeshData_Wire.hxx> |
21 | #include <IMeshData_Face.hxx> |
22 | #include <BRep_Tool.hxx> |
23 | #include <Bnd_Box.hxx> |
24 | #include <BRepBndLib.hxx> |
25 | #include <TopExp_Explorer.hxx> |
26 | #include <TopoDS_Vertex.hxx> |
27 | #include <TopExp.hxx> |
28 | |
29 | //======================================================================= |
30 | //function : RelativeEdgeDeflection |
31 | //purpose : |
32 | //======================================================================= |
33 | Standard_Real BRepMesh_Deflection::RelativeEdgeDeflection( |
34 | const TopoDS_Edge& theEdge, |
35 | const Standard_Real theDeflection, |
36 | const Standard_Real theMaxShapeSize, |
37 | Standard_Real& theAdjustmentCoefficient) |
38 | { |
39 | theAdjustmentCoefficient = 1.; |
40 | Standard_Real aEdgeDeflection = theDeflection; |
41 | if (theEdge.IsNull()) |
42 | { |
43 | return aEdgeDeflection; |
44 | } |
45 | |
46 | Bnd_Box aBox; |
47 | BRepBndLib::Add (theEdge, aBox, Standard_False); |
48 | BRepMesh_ShapeTool::BoxMaxDimension (aBox, aEdgeDeflection); |
49 | |
50 | // Adjust resulting value in relation to the total size |
51 | theAdjustmentCoefficient = theMaxShapeSize / (2 * aEdgeDeflection); |
52 | if (theAdjustmentCoefficient < 0.5) |
53 | { |
54 | theAdjustmentCoefficient = 0.5; |
55 | } |
56 | else if (theAdjustmentCoefficient > 2.) |
57 | { |
58 | theAdjustmentCoefficient = 2.; |
59 | } |
60 | |
61 | return (theAdjustmentCoefficient * aEdgeDeflection * theDeflection); |
62 | } |
63 | |
64 | //======================================================================= |
65 | // Function: ComputeDeflection (edge) |
66 | // Purpose : |
67 | //======================================================================= |
68 | void BRepMesh_Deflection::ComputeDeflection ( |
69 | const IMeshData::IEdgeHandle& theDEdge, |
70 | const Standard_Real theMaxShapeSize, |
71 | const IMeshTools_Parameters& theParameters) |
72 | { |
73 | Standard_Real aLinDeflection; |
74 | Standard_Real aAngDeflection; |
75 | if (theParameters.Relative) |
76 | { |
77 | Standard_Real aScale; |
78 | aLinDeflection = RelativeEdgeDeflection (theDEdge->GetEdge (), |
79 | theParameters.Deflection, theMaxShapeSize, aScale); |
80 | |
81 | // Is it OK? |
82 | aAngDeflection = theParameters.Angle * aScale; |
83 | } |
84 | else |
85 | { |
86 | aLinDeflection = theParameters.Deflection; |
87 | aAngDeflection = theParameters.Angle; |
88 | } |
89 | |
90 | const TopoDS_Edge& anEdge = theDEdge->GetEdge(); |
91 | |
92 | TopoDS_Vertex aFirstVertex, aLastVertex; |
93 | TopExp::Vertices(anEdge, aFirstVertex, aLastVertex); |
94 | |
95 | Handle(Geom_Curve) aCurve; |
96 | Standard_Real aFirstParam, aLastParam; |
97 | if (BRepMesh_ShapeTool::Range(anEdge, aCurve, aFirstParam, aLastParam)) |
98 | { |
99 | const Standard_Real aDistF = aFirstVertex.IsNull() ? -1.0 : |
100 | BRep_Tool::Pnt(aFirstVertex).Distance(aCurve->Value(aFirstParam)); |
101 | const Standard_Real aDistL = aLastVertex.IsNull() ? -1.0 : |
102 | BRep_Tool::Pnt(aLastVertex).Distance(aCurve->Value(aLastParam)); |
103 | |
104 | const Standard_Real aVertexAdjustDistance = Max(aDistF, aDistL); |
105 | |
106 | aLinDeflection = Max(aVertexAdjustDistance, aLinDeflection); |
107 | } |
108 | |
109 | theDEdge->SetDeflection (aLinDeflection); |
110 | theDEdge->SetAngularDeflection (aAngDeflection); |
111 | } |
112 | |
113 | //======================================================================= |
114 | // Function: ComputeDeflection (wire) |
115 | // Purpose : |
116 | //======================================================================= |
117 | void BRepMesh_Deflection::ComputeDeflection ( |
118 | const IMeshData::IWireHandle& theDWire, |
119 | const IMeshTools_Parameters& theParameters) |
120 | { |
121 | Standard_Real aWireDeflection = 0.; |
122 | if (theDWire->EdgesNb () > 0) |
123 | { |
124 | for (Standard_Integer aEdgeIt = 0; aEdgeIt < theDWire->EdgesNb(); ++aEdgeIt) |
125 | { |
126 | aWireDeflection += theDWire->GetEdge(aEdgeIt)->GetDeflection(); |
127 | } |
128 | |
129 | aWireDeflection /= theDWire->EdgesNb (); |
130 | } |
131 | else |
132 | { |
133 | aWireDeflection = theParameters.Deflection; |
134 | } |
135 | |
136 | theDWire->SetDeflection (aWireDeflection); |
137 | } |
138 | |
139 | //======================================================================= |
140 | // Function: ComputeDeflection (face) |
141 | // Purpose : |
142 | //======================================================================= |
143 | void BRepMesh_Deflection::ComputeDeflection ( |
144 | const IMeshData::IFaceHandle& theDFace, |
145 | const IMeshTools_Parameters& theParameters) |
146 | { |
147 | Standard_Real aFaceDeflection = 0.; |
148 | if (theDFace->WiresNb () > 0) |
149 | { |
150 | for (Standard_Integer aWireIt = 0; aWireIt < theDFace->WiresNb(); ++aWireIt) |
151 | { |
152 | aFaceDeflection += theDFace->GetWire(aWireIt)->GetDeflection(); |
153 | } |
154 | |
155 | aFaceDeflection /= theDFace->WiresNb (); |
156 | } |
157 | else |
158 | { |
159 | aFaceDeflection = theParameters.Deflection; |
160 | } |
161 | |
162 | theDFace->SetDeflection (Max(2.* BRepMesh_ShapeTool::MaxFaceTolerance( |
163 | theDFace->GetFace()), aFaceDeflection)); |
164 | } |