/usr/include/vtk-6.3/vtkParametricConicSpiral.h is in libvtk6-dev 6.3.0+dfsg1-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Program: Visualization Toolkit
Module: vtkParametricConicSpiral.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 vtkParametricConicSpiral - Generate conic spiral surfaces that resemble sea-shells.
// .SECTION Description
// vtkParametricConicSpiral generates conic spiral surfaces. These can resemble sea shells, or
// may look like a torus "eating" its own tail.
//
// For further information about this surface, please consult the
// technical description "Parametric surfaces" in http://www.vtk.org/documents.php
// in the "VTK Technical Documents" section in the VTk.org web pages.
//
// .SECTION Thanks
// Andrew Maclean andrew.amaclean@gmail.com for creating and contributing the
// class.
//
#ifndef vtkParametricConicSpiral_h
#define vtkParametricConicSpiral_h
#include "vtkCommonComputationalGeometryModule.h" // For export macro
#include "vtkParametricFunction.h"
class VTKCOMMONCOMPUTATIONALGEOMETRY_EXPORT vtkParametricConicSpiral : public vtkParametricFunction
{
public:
vtkTypeMacro(vtkParametricConicSpiral,vtkParametricFunction);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Construct a conic spiral surface with the following parameters:
// MinimumU = 0, MaximumU = 2Pi,
// MinimumV = 0, MaximumV = 2Pi,
// JoinU = 0, JoinV = 0,
// TwistU = 0, TwistV = 0,
// ClockwiseOrdering = 1,
// DerivativesAvailable = 1,
// A = 0.2, B = 1.0, C = 0.1, N = 2.
static vtkParametricConicSpiral *New();
// Description
// Return the parametric dimension of the class.
virtual int GetDimension() {return 2;}
// Description:
// Set/Get the scale factor.
// Default = 0.2
vtkSetMacro(A,double);
vtkGetMacro(A,double);
// Description:
// Set/Get the A function coefficient.
// See the definition in Parametric surfaces referred to above.
// Default is 1.
vtkSetMacro(B,double);
vtkGetMacro(B,double);
// Description:
// Set/Get the B function coefficient.
// See the definition in Parametric surfaces referred to above.
// Default is 0.1.
vtkSetMacro(C,double);
vtkGetMacro(C,double);
// Description:
// Set/Get the C function coefficient.
// See the definition in Parametric surfaces referred to above.
// Default is 2.
vtkSetMacro(N,double);
vtkGetMacro(N,double);
// Description:
// A conic spiral 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$Pt = (x, y, z), Du = (dx/du, dy/du, dz/du), Dv = (dx/dv, dy/dv, dz/dv)\f$ .
// Then the normal is \f$N = Du X Dv\f$ .
virtual void Evaluate(double uvw[3], double Pt[3], double Duvw[9]);
// Description:
// Calculate a user defined scalar using one or all of uvw, Pt, Duvw.
//
// 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().
//
// This function is only called if the ScalarMode has the value
// vtkParametricFunctionSource::SCALAR_FUNCTION_DEFINED
//
// If the user does not need to calculate a scalar, then the
// instantiated function should return zero.
virtual double EvaluateScalar(double uvw[3], double Pt[3], double Duvw[9]);
protected:
vtkParametricConicSpiral();
~vtkParametricConicSpiral();
// Variables
double A;
double B;
double C;
double N;
private:
vtkParametricConicSpiral(const vtkParametricConicSpiral&); // Not implemented.
void operator=(const vtkParametricConicSpiral&); // Not implemented.
};
#endif
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