/usr/include/vtk-5.8/vtkPolyDataNormals.h is in libvtk5-dev 5.8.0-5.
This file is owned by root:root, with mode 0o644.
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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 | /*=========================================================================
Program: Visualization Toolkit
Module: vtkPolyDataNormals.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 vtkPolyDataNormals - compute normals for polygonal mesh
// .SECTION Description
// vtkPolyDataNormals is a filter that computes point normals for a polygonal
// mesh. The filter can reorder polygons to insure consistent orientation
// across polygon neighbors. Sharp edges can be split and points duplicated
// with separate normals to give crisp (rendered) surface definition. It is
// also possible to globally flip the normal orientation.
//
// The algorithm works by determining normals for each polygon and then
// averaging them at shared points. When sharp edges are present, the edges
// are split and new points generated to prevent blurry edges (due to
// Gouraud shading).
// .SECTION Caveats
// Normals are computed only for polygons and triangle strips. Normals are
// not computed for lines or vertices.
//
// Triangle strips are broken up into triangle polygons. You may want to
// restrip the triangles.
#ifndef __vtkPolyDataNormals_h
#define __vtkPolyDataNormals_h
#include "vtkPolyDataAlgorithm.h"
class vtkFloatArray;
class vtkIdList;
class vtkPolyData;
class VTK_GRAPHICS_EXPORT vtkPolyDataNormals : public vtkPolyDataAlgorithm
{
public:
vtkTypeMacro(vtkPolyDataNormals,vtkPolyDataAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Construct with feature angle=30, splitting and consistency turned on,
// flipNormals turned off, and non-manifold traversal turned on.
// ComputePointNormals is on and ComputeCellNormals is off.
static vtkPolyDataNormals *New();
// Description:
// Specify the angle that defines a sharp edge. If the difference in
// angle across neighboring polygons is greater than this value, the
// shared edge is considered "sharp".
vtkSetClampMacro(FeatureAngle,double,0.0,180.0);
vtkGetMacro(FeatureAngle,double);
// Description:
// Turn on/off the splitting of sharp edges.
vtkSetMacro(Splitting,int);
vtkGetMacro(Splitting,int);
vtkBooleanMacro(Splitting,int);
// Description:
// Turn on/off the enforcement of consistent polygon ordering.
vtkSetMacro(Consistency,int);
vtkGetMacro(Consistency,int);
vtkBooleanMacro(Consistency,int);
// Description:
// Turn on/off the automatic determination of correct normal
// orientation. NOTE: This assumes a completely closed surface
// (i.e. no boundary edges) and no non-manifold edges. If these
// constraints do not hold, all bets are off. This option adds some
// computational complexity, and is useful if you don't want to have
// to inspect the rendered image to determine whether to turn on the
// FlipNormals flag. However, this flag can work with the FlipNormals
// flag, and if both are set, all the normals in the output will
// point "inward".
vtkSetMacro(AutoOrientNormals, int);
vtkGetMacro(AutoOrientNormals, int);
vtkBooleanMacro(AutoOrientNormals, int);
// Description:
// Turn on/off the computation of point normals.
vtkSetMacro(ComputePointNormals,int);
vtkGetMacro(ComputePointNormals,int);
vtkBooleanMacro(ComputePointNormals,int);
// Description:
// Turn on/off the computation of cell normals.
vtkSetMacro(ComputeCellNormals,int);
vtkGetMacro(ComputeCellNormals,int);
vtkBooleanMacro(ComputeCellNormals,int);
// Description:
// Turn on/off the global flipping of normal orientation. Flipping
// reverves the meaning of front and back for Frontface and Backface
// culling in vtkProperty. Flipping modifies both the normal
// direction and the order of a cell's points.
vtkSetMacro(FlipNormals,int);
vtkGetMacro(FlipNormals,int);
vtkBooleanMacro(FlipNormals,int);
// Description:
// Turn on/off traversal across non-manifold edges. This will prevent
// problems where the consistency of polygonal ordering is corrupted due
// to topological loops.
vtkSetMacro(NonManifoldTraversal,int);
vtkGetMacro(NonManifoldTraversal,int);
vtkBooleanMacro(NonManifoldTraversal,int);
protected:
vtkPolyDataNormals();
~vtkPolyDataNormals() {};
// Usual data generation method
int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);
double FeatureAngle;
int Splitting;
int Consistency;
int FlipNormals;
int AutoOrientNormals;
int NonManifoldTraversal;
int ComputePointNormals;
int ComputeCellNormals;
int NumFlips;
private:
vtkIdList *Wave;
vtkIdList *Wave2;
vtkIdList *CellIds;
vtkIdList *Map;
vtkPolyData *OldMesh;
vtkPolyData *NewMesh;
int *Visited;
vtkFloatArray *PolyNormals;
double CosAngle;
// Uses the list of cell ids (this->Wave) to propagate a wave of
// checked and properly ordered polygons.
void TraverseAndOrder(void);
// Check the point id give to see whether it lies on a feature
// edge. If so, split the point (i.e., duplicate it) to topologically
// separate the mesh.
void MarkAndSplit(vtkIdType ptId);
private:
vtkPolyDataNormals(const vtkPolyDataNormals&); // Not implemented.
void operator=(const vtkPolyDataNormals&); // Not implemented.
};
#endif
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