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
|
/*=========================================================================
Program: Visualization Toolkit
Module: vtkFrustumSource.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 vtkFrustumSource
* @brief create a polygonal representation of a frustum
*
* vtkFrustumSource creates a frustum defines by a set of planes. The frustum
* is represented with four-sided polygons. It is possible to specify extra
* lines to better visualize the field of view.
*
* @par Usage:
* Typical use consists of 3 steps:
* 1. get the planes coefficients from a vtkCamera with
* vtkCamera::GetFrustumPlanes()
* 2. initialize the planes with vtkPlanes::SetFrustumPlanes() with the planes
* coefficients
* 3. pass the vtkPlanes to a vtkFrustumSource.
*/
#ifndef vtkFrustumSource_h
#define vtkFrustumSource_h
#include "vtkFiltersSourcesModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"
class vtkPlanes;
class VTKFILTERSSOURCES_EXPORT vtkFrustumSource : public vtkPolyDataAlgorithm
{
public:
static vtkFrustumSource *New();
vtkTypeMacro(vtkFrustumSource,vtkPolyDataAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;
//@{
/**
* Return the 6 planes defining the frustum. Initial value is NULL.
* The 6 planes are defined in this order: left,right,bottom,top,far,near.
* If Planes==NULL or if Planes->GetNumberOfPlanes()!=6 when RequestData()
* is called, an error message will be emitted and RequestData() will
* return right away.
*/
vtkGetObjectMacro(Planes,vtkPlanes);
//@}
/**
* Set the 6 planes defining the frustum.
*/
virtual void SetPlanes(vtkPlanes *planes);
//@{
/**
* Tells if some extra lines will be generated. Initial value is true.
*/
vtkGetMacro(ShowLines,bool);
vtkSetMacro(ShowLines,bool);
vtkBooleanMacro(ShowLines,bool);
//@}
//@{
/**
* Length of the extra lines. This a stricly positive value.
* Initial value is 1.0.
*/
vtkGetMacro(LinesLength,double);
vtkSetMacro(LinesLength,double);
//@}
/**
* Modified GetMTime because of Planes.
*/
vtkMTimeType GetMTime() VTK_OVERRIDE;
//@{
/**
* Set/get the desired precision for the output points.
* vtkAlgorithm::SINGLE_PRECISION - Output single-precision floating point.
* vtkAlgorithm::DOUBLE_PRECISION - Output double-precision floating point.
*/
vtkSetMacro(OutputPointsPrecision,int);
vtkGetMacro(OutputPointsPrecision,int);
//@}
protected:
/**
* Default construtor. Planes=NULL. ShowLines=true. LinesLength=1.0.
*/
vtkFrustumSource();
~vtkFrustumSource() VTK_OVERRIDE;
int RequestData(vtkInformation *request,
vtkInformationVector **inputVector,
vtkInformationVector *outputVector) VTK_OVERRIDE;
/**
* Compute the intersection of 3 planes.
*/
void ComputePoint(int planes[3],
double *pt);
vtkPlanes *Planes;
bool ShowLines;
double LinesLength;
int OutputPointsPrecision;
private:
vtkFrustumSource(const vtkFrustumSource&) VTK_DELETE_FUNCTION;
void operator=(const vtkFrustumSource&) VTK_DELETE_FUNCTION;
};
#endif
|
