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
|
#pragma once
#include "LiveSourceDummySourcesModule.h"
#include "vtkPolyDataAlgorithm.h"
#include <array>
class vtkPoints;
class vtkCellArray;
struct Coords
{
double a, b, c;
Coords(double pa = .0, double pb = .0, double pc = .0)
: a{ pa }
, b{ pb }
, c{ pc }
{
}
};
struct TriangleBase
{
std::array<Coords, 3> tri = { { { 0.0, 0.0, 0.0 }, { 0.0, 1.0, 0.0 }, { 0.0, 0.5, 0.66 } } };
Coords middle(Coords pl, Coords pr)
{
return Coords((pl.a + pr.a) / 2, (pl.b + pr.b) / 2, (pl.c + pr.c) / 2);
}
Coords next(Coords current)
{
int base = vtkMath::Random(0, 3);
return middle(current, tri[base]);
}
};
class LIVESOURCEDUMMYSOURCES_EXPORT vtkLiveSourceDummy : public vtkPolyDataAlgorithm
{
public:
static vtkLiveSourceDummy* New();
vtkTypeMacro(vtkLiveSourceDummy, vtkPolyDataAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent) override;
///@{
/**
* Set/Get the maximum number of iteration before the live source stops.
*/
vtkSetMacro(MaxIterations, int);
vtkGetMacro(MaxIterations, int);
///@}
/**
* Check if the RequestUpdateExtent/RequestData need to be called again to refresh the output.
* Return true if an update is needed.
*
* This method is required for Live Source.
*/
bool GetNeedsUpdate();
protected:
vtkLiveSourceDummy();
~vtkLiveSourceDummy() override = default;
int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
private:
// This parameter can be modified by the user and serve to demonstrate how a live source can stop
// updating
int MaxIterations = 2000;
// This parameter is used to store and update the current iteration
int CurIteration = 0;
vtkNew<vtkPoints> Points;
vtkNew<vtkCellArray> Cells;
Coords Pos{ .0, .0, .0 };
TriangleBase Tri;
vtkLiveSourceDummy(const vtkLiveSourceDummy&) = delete;
void operator=(const vtkLiveSourceDummy&) = delete;
};
|
