This file is indexed.

/usr/include/vtk-5.8/vtkParametricFunction.h is in libvtk5-dev 5.8.0-5.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkParametricFunction.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen 
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
// .NAME vtkParametricFunction - abstract interface for parametric functions
// .SECTION Description
// vtkParametricFunction is an abstract interface for functions
// defined by parametric mapping i.e. f(u,v,w)->(x,y,z) where 
// u_min <= u < u_max, v_min <= v < v_max, w_min <= w < w_max. (For
// notational convenience, we will write f(u)->x and assume that
// u means (u,v,w) and x means (x,y,z).)
//
// The interface contains the pure virtual function, Evaluate(), that
// generates a point and the derivatives at that point which are then used to
// construct the surface. A second pure virtual function, EvaluateScalar(),
// can be used to generate a scalar for the surface. Finally, the
// GetDimension() virtual function is used to differentiate 1D, 2D, and 3D
// parametric functions. Since this abstract class defines a pure virtual
// API, its subclasses must implement the pure virtual functions
// GetDimension(), Evaluate() and EvaluateScalar().
//
// This class has also methods for defining a range of parametric values (u,v,w).
// 
// .SECTION Thanks
// Andrew Maclean a.maclean@cas.edu.au for creating and contributing the
// class.
//
// .SECTION See Also
// vtkParametricFunctionSource - tessellates a parametric function
//
// Implementations of derived classes implementing non-orentable surfaces:
// vtkParametricBoy vtkParametricCrossCap vtkParametricFigure8Klein
// vtkParametricKlein vtkParametricMobius vtkParametricRoman
//
// Implementations of derived classes implementing orientable surfaces:
// vtkParametricConicSpiral vtkParametricDini vtkParametricEllipsoid 
// vtkParametricEnneper vtkParametricRandomHills vtkParametricSuperEllipsoid 
// vtkParametricSuperToroid vtkParametricTorus 
//
#ifndef __vtkParametricFunction_h
#define __vtkParametricFunction_h

#include "vtkObject.h"

class VTK_COMMON_EXPORT vtkParametricFunction : public vtkObject
{
public:
  vtkTypeMacro(vtkParametricFunction, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description
  // Return the dimension of parametric space. Depending on the dimension,
  // then the (u,v,w) parameters and associated information (e.g., derivates)
  // have meaning. For example, if the dimension of the function is one, then
  // u[0] and Duvw[0...2] have meaning.
  // This is a pure virtual function that must be instantiated in 
  // a derived class. 
  virtual int GetDimension() = 0;

  // Description:
  // Performs the mapping \$f(uvw)->(Pt,Duvw)\$f.
  // This is a pure virtual function that must be instantiated in 
  // a derived class. 
  //
  // uvw are the parameters, with u corresponding to uvw[0],
  // v to uvw[1] and w to uvw[2] respectively. Pt is the returned Cartesian point, 
  // Duvw are the derivatives of this point with respect to u, v and w.  
  // Note that the first three values in Duvw are Du, the next three are Dv, 
  // and the final three are Dw. Du Dv Dw are the partial derivatives of the 
  // function at the point Pt with respect to u, v and w respectively.
  virtual void Evaluate(double uvw[3], double Pt[3], double Duvw[9]) = 0;

  // Description:
  // Calculate a user defined scalar using one or all of uvw, Pt, Duvw.
  // This is a pure virtual function that must be instantiated in 
  // a derived class. 
  //
  // uvw are the parameters with Pt being the the cartesian point, 
  // Duvw are the derivatives of this point with respect to u, v, and w.
  // Pt, Duvw are obtained from Evaluate().
  virtual double EvaluateScalar(double uvw[3], double Pt[3], double Duvw[9]) = 0;

  // Description:
  // Set/Get the minimum u-value.
  vtkSetMacro(MinimumU,double);
  vtkGetMacro(MinimumU,double);

  // Description:
  // Set/Get the maximum u-value.
  vtkSetMacro(MaximumU,double);
  vtkGetMacro(MaximumU,double);

  // Description:
  // Set/Get the minimum v-value.
  vtkSetMacro(MinimumV,double);
  vtkGetMacro(MinimumV,double);

  // Description:
  // Set/Get the maximum v-value.
  vtkSetMacro(MaximumV,double);
  vtkGetMacro(MaximumV,double);

  // Description:
  // Set/Get the minimum w-value.
  vtkSetMacro(MinimumW,double);
  vtkGetMacro(MinimumW,double);

  // Description:
  // Set/Get the maximum w-value.
  vtkSetMacro(MaximumW,double);
  vtkGetMacro(MaximumW,double);

  // Description:
  // Set/Get the flag which joins the first triangle strip to the last one.
  vtkSetMacro(JoinU,int);
  vtkGetMacro(JoinU,int);
  vtkBooleanMacro(JoinU,int);

  // Description:
  // Set/Get the flag which joins the the ends of the triangle strips.
  vtkSetMacro(JoinV,int);
  vtkGetMacro(JoinV,int);
  vtkBooleanMacro(JoinV,int);

  // Description:
  // Set/Get the flag which joins the first triangle strip to 
  // the last one with a twist.
  // JoinU must also be set if this is set. Used when building
  // some non-orientable surfaces.
  vtkSetMacro(TwistU,int);
  vtkGetMacro(TwistU,int);
  vtkBooleanMacro(TwistU,int);

  // Description:
  // Set/Get the flag which joins the ends of the 
  // triangle strips with a twist.
  // JoinV must also be set if this is set. Used when building
  // some non-orientable surfaces.
  vtkSetMacro(TwistV,int);
  vtkGetMacro(TwistV,int);
  vtkBooleanMacro(TwistV,int);

  // Description:
  // Set/Get the flag which determines the ordering of the the 
  // vertices forming the triangle strips. The ordering of the 
  // points being inserted into the triangle strip is important 
  // because it determines the direction of the normals for the 
  // lighting. If set, the ordering is clockwise, otherwise the
  // ordering is anti-clockwise. Default is true (i.e. clockwise
  // ordering).
  vtkSetMacro(ClockwiseOrdering,int);
  vtkGetMacro(ClockwiseOrdering,int);
  vtkBooleanMacro(ClockwiseOrdering,int);

  // Description:
  // Set/Get the flag which determines whether derivatives are available 
  // from the parametric function (i.e., whether the Evaluate() method 
  // returns valid derivatives).
  vtkSetMacro(DerivativesAvailable,int);
  vtkGetMacro(DerivativesAvailable,int);
  vtkBooleanMacro(DerivativesAvailable,int);

protected:
  vtkParametricFunction();
  virtual ~vtkParametricFunction();

  // Variables
  double MinimumU;
  double MaximumU;
  double MinimumV;
  double MaximumV;
  double MinimumW;
  double MaximumW;

  int JoinU;
  int JoinV;
  int JoinW;

  int TwistU;
  int TwistV;
  int TwistW;

  int ClockwiseOrdering;
  
  int DerivativesAvailable;

private:
  vtkParametricFunction(const vtkParametricFunction&);  // Not implemented.
  void operator=(const vtkParametricFunction&);  // Not implemented.

};

#endif