File: vtkRuledSurfaceFilter.h

package info (click to toggle)
vtk7 7.1.1%2Bdfsg1-12
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 125,776 kB
  • sloc: cpp: 1,539,582; ansic: 106,521; python: 78,038; tcl: 47,013; xml: 8,142; yacc: 5,040; java: 4,439; perl: 3,132; lex: 1,926; sh: 1,500; makefile: 122; objc: 83
file content (203 lines) | stat: -rw-r--r-- 7,004 bytes parent folder | download | duplicates (2)
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:    vtkRuledSurfaceFilter.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   vtkRuledSurfaceFilter
 * @brief   generates a surface from a set of lines
 *
 * vtkRuledSurfaceFilter is a filter that generates a surface from a set of
 * lines. The lines are assumed to be "parallel" in the sense that they do
 * not intersect and remain somewhat close to one another. A surface is
 * generated by connecting the points defining each pair of lines with
 * straight lines. This creates a strip for each pair of lines (i.e., a
 * triangulation is created from two generating lines). The filter can handle
 * an arbitrary number of lines, with lines i and i+1 assumed connected.
 * Note that there are several different approaches for creating the ruled
 * surface, the method for creating the surface can either use the input
 * points or resample from the polylines (using a user-specified resolution).
 *
 * This filter offers some other important features. A DistanceFactor ivar is
 * used to decide when two lines are too far apart to connect. (The factor is
 * a multiple of the distance between the first two points of the two lines
 * defining the strip.) If the distance between the two generating lines
 * becomes too great, then the surface is not generated in that
 * region. (Note: if the lines separate and then merge, then a hole can be
 * generated in the surface.) In addition, the Offset and OnRation ivars can
 * be used to create nifty striped surfaces. Closed surfaces (e.g., tubes) can
 * be created by setting the CloseSurface ivar. (The surface can be closed
 * in the other direction by repeating the first and last point in the
 * polylines defining the surface.)
 *
 * An important use of this filter is to combine it with vtkStreamTracer to
 * generate stream surfaces. It can also be used to create surfaces from
 * contours.
 *
 * @warning
 * The number of lines must be greater than two if a surface is to be
 * generated.  sides (i.e., a ribbon), use vtkRibbonFilter.
 *
 * @sa
 * vtkRibbonFilter vtkStreamTracer
*/

#ifndef vtkRuledSurfaceFilter_h
#define vtkRuledSurfaceFilter_h

#include "vtkFiltersModelingModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"

class vtkIdList;
class vtkPoints;
class vtkPolyData;

#define VTK_RULED_MODE_RESAMPLE 0
#define VTK_RULED_MODE_POINT_WALK 1

class VTKFILTERSMODELING_EXPORT vtkRuledSurfaceFilter : public vtkPolyDataAlgorithm
{
public:
  vtkTypeMacro(vtkRuledSurfaceFilter,vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent);

  /**
   * Construct object with OnRatio=1, Offset=0. DistanceFactor=3.0,
   * CloseSurface off, and PassLines off.
   */
  static vtkRuledSurfaceFilter *New();

  //@{
  /**
   * Set/Get the factor that controls tearing of the surface.
   */
  vtkSetClampMacro(DistanceFactor,double,1.0,VTK_DOUBLE_MAX);
  vtkGetMacro(DistanceFactor,double);
  //@}

  //@{
  /**
   * Control the striping of the ruled surface. If OnRatio is greater
   * than 1, then every nth strip is turned on, beginning with the Offset
   * strip.
   */
  vtkSetClampMacro(OnRatio,int,1,VTK_INT_MAX);
  vtkGetMacro(OnRatio,int);
  //@}

  //@{
  /**
   * Control the striping of the ruled surface. The offset sets the
   * first stripe that is visible. Offset is generally used with
   * OnRatio to create nifty striping effects.
   */
  vtkSetClampMacro(Offset,int,0,VTK_INT_MAX);
  vtkGetMacro(Offset,int);
  //@}

  //@{
  /**
   * Indicate whether the surface is to be closed. If this boolean is
   * on, then the first and last polyline are used to generate a stripe
   * that closes the surface. (Note: to close the surface in the other
   * direction, repeat the first point in the polyline as the last
   * point in the polyline.)
   */
  vtkSetMacro(CloseSurface,int);
  vtkGetMacro(CloseSurface,int);
  vtkBooleanMacro(CloseSurface,int);
  //@}

  //@{
  /**
   * Set the mode by which to create the ruled surface. (Dramatically
   * different results are possible depending on the chosen mode.) The
   * resample mode evenly resamples the polylines (based on length) and
   * generates triangle strips. The point walk mode uses the existing
   * points and walks around the polyline using existing points.
   */
  vtkSetClampMacro(RuledMode,int,
                   VTK_RULED_MODE_RESAMPLE,VTK_RULED_MODE_POINT_WALK);
  vtkGetMacro(RuledMode,int);
  void SetRuledModeToResample()
    {this->SetRuledMode(VTK_RULED_MODE_RESAMPLE);}
  void SetRuledModeToPointWalk()
    {this->SetRuledMode(VTK_RULED_MODE_POINT_WALK);}
  const char *GetRuledModeAsString();
  //@}

  //@{
  /**
   * If the ruled surface generation mode is RESAMPLE, then these parameters
   * are used to determine the resample rate. Resolution[0] defines the
   * resolution in the direction of the polylines; Resolution[1] defines
   * the resolution across the polylines (i.e., direction orthogonal to
   * Resolution[0]).
   */
  vtkSetVector2Macro(Resolution, int);
  vtkGetVectorMacro(Resolution, int, 2);
  //@}

  //@{
  /**
   * Indicate whether the generating lines are to be passed to the output.
   * By defualt lines are not passed to the output.
   */
  vtkSetMacro(PassLines,int);
  vtkGetMacro(PassLines,int);
  vtkBooleanMacro(PassLines,int);
  //@}

  //@{
  /**
   * Indicate whether the starting points of the loops need to be determined.
   * If set to 0, then its assumes that the 0th point of each loop should be
   * always connected
   * By defualt the loops are not oriented.
   */
  vtkSetMacro(OrientLoops,int);
  vtkGetMacro(OrientLoops,int);
  vtkBooleanMacro(OrientLoops,int);
  //@}

protected:
  vtkRuledSurfaceFilter();
  ~vtkRuledSurfaceFilter();

  // Usual data generation method
  int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *);

  double DistanceFactor;
  int   OnRatio;
  int   Offset;
  int   CloseSurface;
  int   RuledMode;
  int   Resolution[2];
  int   PassLines;
  int   OrientLoops;

private:
  vtkIdList *Ids;
  double     Weights[4];

  void  Resample(vtkPolyData *output, vtkPolyData *input,
                 vtkPoints *inPts, vtkPoints *newPts,
                 int npts, vtkIdType *pts, int npts2, vtkIdType *pts2);
  void  PointWalk(vtkPolyData *output, vtkPoints *inPts,
                  int npts, vtkIdType *pts, int npts2, vtkIdType *pts2);

private:
  vtkRuledSurfaceFilter(const vtkRuledSurfaceFilter&) VTK_DELETE_FUNCTION;
  void operator=(const vtkRuledSurfaceFilter&) VTK_DELETE_FUNCTION;
};

#endif