/usr/include/vtk-7.1/vtkParametricPluckerConoid.h is in libvtk7-dev 7.1.1+dfsg1-2.
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 | /*=========================================================================
Program: Visualization Toolkit
Module: vtkParametricPluckerConoid.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.
=========================================================================*/
/**
* @class vtkParametricPluckerConoid
* @brief Generate Plucker's conoid surface.
*
* vtkParametricPluckerConoid generates Plucker's conoid surface parametrically.
* Plucker's conoid is a ruled surface, named after Julius Plucker. It is
* possible to set the number of folds in this class via the parameter 'N'.
*
* For more information, see the Wikipedia page on
* <a href="https://en.wikipedia.org/wiki/Plücker%27s_conoid">Plucker's Conoid</a>.
* @warning
* I haven't done any special checking on the number of folds parameter, N.
* @par Thanks:
* Tim Meehan
*/
#ifndef vtkParametricPluckerConoid_h
#define vtkParametricPluckerConoid_h
#include "vtkCommonComputationalGeometryModule.h" // For export macro
#include "vtkParametricFunction.h"
class VTKCOMMONCOMPUTATIONALGEOMETRY_EXPORT vtkParametricPluckerConoid : public vtkParametricFunction
{
public:
vtkTypeMacro(vtkParametricPluckerConoid,vtkParametricFunction);
void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;
//@{
/**
* This is the number of folds in the conoid.
*/
vtkGetMacro(N, int);
vtkSetMacro(N, int);
//@}
/**
* Construct Plucker's conoid surface with the following parameters:
* (MinimumU, MaximumU) = (0., 3.),
* (MinimumV, MaximumV) = (0., pi),
* JoinU = 0, JoinV = 0,
* TwistU = 0, TwistV = 0;
* ClockwiseOrdering = 1,
* DerivativesAvailable = 1,
*/
static vtkParametricPluckerConoid *New();
/**
* Return the parametric dimension of the class.
*/
int GetDimension() VTK_OVERRIDE {return 2;}
/**
* Plucker's conoid surface.
* This function performs the mapping \f$f(u,v) \rightarrow (x,y,x)\f$, returning it
* as Pt. It also returns the partial derivatives Du and Dv.
* \f$Pt = (x, y, z), D_u\vec{f} = (dx/du, dy/du, dz/du), D_v\vec{f} = (dx/dv, dy/dv, dz/dv)\f$ .
* Then the normal is \f$N = D_u\vec{f} \times D_v\vec{f}\f$ .
*/
void Evaluate(double uvw[3], double Pt[3], double Duvw[9]) VTK_OVERRIDE;
/**
* Calculate a user defined scalar using one or all of uvw, Pt, Duvw.
* This method simply returns 0.
*/
double EvaluateScalar(double uvw[3], double Pt[3], double Duvw[9]) VTK_OVERRIDE;
protected:
vtkParametricPluckerConoid();
~vtkParametricPluckerConoid() VTK_OVERRIDE;
// Variables
int N;
private:
vtkParametricPluckerConoid(const vtkParametricPluckerConoid&) VTK_DELETE_FUNCTION;
void operator=(const vtkParametricPluckerConoid&) VTK_DELETE_FUNCTION;
};
#endif
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