FreeFOAM The Cross-Platform CFD Toolkit
wedge.C
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1 /*---------------------------------------------------------------------------*\
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3  \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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5  \\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
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24 \*---------------------------------------------------------------------------*/
25 
26 #include "wedge.H"
29 
30 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
31 
32 namespace Foam
33 {
34 namespace extrudeModels
35 {
36 
37 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
38 
39 defineTypeNameAndDebug(wedge, 0);
40 
41 addToRunTimeSelectionTable(extrudeModel, wedge, dictionary);
42 
43 
44 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
45 
47 :
48  extrudeModel(typeName, dict),
49  axisPt_(coeffDict_.lookup("axisPt")),
50  axis_(coeffDict_.lookup("axis")),
51  angle_
52  (
53  readScalar(coeffDict_.lookup("angle"))
54  *mathematicalConstant::pi/180.0
55  )
56 {}
57 
58 
59 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
60 
62 {}
63 
64 
65 // * * * * * * * * * * * * * * * * Operators * * * * * * * * * * * * * * * * //
66 
67 point wedge::operator()
68 (
69  const point& surfacePoint,
70  const vector& surfaceNormal,
71  const label layer
72 ) const
73 {
74  scalar sliceAngle;
75  // For the case of a single layer extrusion assume a
76  // symmetric wedge about the reference plane is required
77  if (nLayers_ == 1)
78  {
79  if (layer == 0)
80  {
81  sliceAngle = -angle_/2.0;
82  }
83  else
84  {
85  sliceAngle = angle_/2.0;
86  }
87  }
88  else
89  {
90  //sliceAngle = angle_*(layer + 1)/nLayers_;
91  sliceAngle = angle_*layer/nLayers_;
92  }
93 
94  // Find projection onto axis (or rather decompose surfacePoint
95  // into vector along edge (proj), vector normal to edge in plane
96  // of surface point and surface normal.
97  point d = surfacePoint - axisPt_;
98 
99  d -= (axis_ & d)*axis_;
100 
101  scalar dMag = mag(d);
102 
103  point edgePt = surfacePoint - d;
104 
105  // Rotate point around sliceAngle.
106  point rotatedPoint = edgePt;
107 
108  if (dMag > VSMALL)
109  {
110  vector n = (d/dMag) ^ axis_;
111 
112  rotatedPoint +=
113  + cos(sliceAngle)*d
114  - sin(sliceAngle)*mag(d)*n; // Use either n or surfaceNormal
115  }
116 
117  return rotatedPoint;
118 }
119 
120 
121 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
122 
123 } // End namespace extrudeModels
124 } // End namespace Foam
125 
126 // ************************ vim: set sw=4 sts=4 et: ************************ //