File: vtkPointSource.cxx

package info (click to toggle)
vtk6 6.3.0%2Bdfsg2-8.1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 118,972 kB
  • sloc: cpp: 1,442,790; ansic: 113,395; python: 72,383; tcl: 46,998; xml: 8,119; yacc: 4,525; java: 4,239; perl: 3,108; lex: 1,694; sh: 1,093; asm: 154; makefile: 68; objc: 17
file content (138 lines) | stat: -rw-r--r-- 4,331 bytes parent folder | download | duplicates (6)
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
/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkPointSource.cxx

  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.

=========================================================================*/
#include "vtkPointSource.h"

#include "vtkCellArray.h"
#include "vtkMath.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkPoints.h"
#include "vtkPolyData.h"

#include <float.h>
#include <math.h>

vtkStandardNewMacro(vtkPointSource);

//----------------------------------------------------------------------------
vtkPointSource::vtkPointSource(vtkIdType numPts)
{
  this->NumberOfPoints = (numPts > 0 ? numPts : 10);

  this->Center[0] = 0.0;
  this->Center[1] = 0.0;
  this->Center[2] = 0.0;

  this->Radius = 0.5;

  this->Distribution = VTK_POINT_UNIFORM;
  this->OutputPointsPrecision = SINGLE_PRECISION;

  this->SetNumberOfInputPorts(0);
}

//----------------------------------------------------------------------------
int vtkPointSource::RequestData(
  vtkInformation *vtkNotUsed(request),
  vtkInformationVector **vtkNotUsed(inputVector),
  vtkInformationVector *outputVector)
{
  // get the info object
  vtkInformation *outInfo = outputVector->GetInformationObject(0);

  // get the ouptut
  vtkPolyData *output = vtkPolyData::SafeDownCast(
    outInfo->Get(vtkDataObject::DATA_OBJECT()));

  vtkIdType i;
  double theta, rho, cosphi, sinphi, radius;
  double x[3];
  vtkPoints *newPoints;
  vtkCellArray *newVerts;

  newPoints = vtkPoints::New();

  // Set the desired precision for the points in the output.
  if(this->OutputPointsPrecision == vtkAlgorithm::DOUBLE_PRECISION)
    {
    newPoints->SetDataType(VTK_DOUBLE);
    }
  else
    {
    newPoints->SetDataType(VTK_FLOAT);
    }

  newPoints->Allocate(this->NumberOfPoints);
  newVerts = vtkCellArray::New();
  newVerts->Allocate(newVerts->EstimateSize(1,this->NumberOfPoints));

  newVerts->InsertNextCell(this->NumberOfPoints);

  if (this->Distribution == VTK_POINT_SHELL)
    {  // only produce points on the surface of the sphere
    for (i=0; i<this->NumberOfPoints; i++)
      {
      cosphi = 1 - 2*vtkMath::Random();
      sinphi = sqrt(1 - cosphi*cosphi);
      radius = this->Radius * sinphi;
      theta = 2.0 * vtkMath::Pi() * vtkMath::Random();
      x[0] = this->Center[0] + radius*cos(theta);
      x[1] = this->Center[1] + radius*sin(theta);
      x[2] = this->Center[2] + this->Radius*cosphi;
      newVerts->InsertCellPoint(newPoints->InsertNextPoint(x));
      }
    }
  else
    { // uniform distribution throughout the sphere volume
    for (i=0; i<this->NumberOfPoints; i++)
      {
      cosphi = 1 - 2*vtkMath::Random();
      sinphi = sqrt(1 - cosphi*cosphi);
      rho = this->Radius*pow(vtkMath::Random(),0.33333333);
      radius = rho * sinphi;
      theta = 2.0 * vtkMath::Pi() * vtkMath::Random();
      x[0] = this->Center[0] + radius*cos(theta);
      x[1] = this->Center[1] + radius*sin(theta);
      x[2] = this->Center[2] + rho*cosphi;
      newVerts->InsertCellPoint(newPoints->InsertNextPoint(x));
      }
    }
   //
   // Update ourselves and release memory
   //
  output->SetPoints(newPoints);
  newPoints->Delete();

  output->SetVerts(newVerts);
  newVerts->Delete();

  return 1;
}

//----------------------------------------------------------------------------
void vtkPointSource::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os,indent);

  os << indent << "Number Of Points: " << this->NumberOfPoints << "\n";
  os << indent << "Radius: " << this->Radius << "\n";
  os << indent << "Center: (" << this->Center[0] << ", "
                              << this->Center[1] << ", "
                              << this->Center[2] << ")\n";
  os << indent << "Distribution: " <<
     ((this->Distribution == VTK_POINT_SHELL) ? "Shell\n" : "Uniform\n");
  os << indent << "Output Points Precision: " << this->OutputPointsPrecision << "\n";
}