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
|
/*=========================================================================
Program: Visualization Toolkit
Module: vtkLinearKernel.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 "vtkLinearKernel.h"
#include "vtkAbstractPointLocator.h"
#include "vtkObjectFactory.h"
#include "vtkIdList.h"
#include "vtkDoubleArray.h"
vtkStandardNewMacro(vtkLinearKernel);
//----------------------------------------------------------------------------
vtkLinearKernel::vtkLinearKernel()
{
}
//----------------------------------------------------------------------------
vtkLinearKernel::~vtkLinearKernel()
{
}
//----------------------------------------------------------------------------
vtkIdType vtkLinearKernel::
ComputeWeights(double*, vtkIdList *pIds, vtkDoubleArray *prob,
vtkDoubleArray *weights)
{
vtkIdType numPts = pIds->GetNumberOfIds();
double *p = (prob ? prob->GetPointer(0) : NULL);
weights->SetNumberOfTuples(numPts);
double *w = weights->GetPointer(0);
double weight = 1.0 / static_cast<double>(numPts);
if ( ! prob ) //standard linear interpolation
{
for (vtkIdType i=0; i < numPts; ++i)
{
w[i] = weight;
}
}
else //weight by probability
{
double sum=0.0;
for (vtkIdType i=0; i < numPts; ++i)
{
w[i] = weight * p[i];
sum += w[i];
}
// Now normalize
if ( this->NormalizeWeights && sum != 0.0 )
{
for (vtkIdType i=0; i < numPts; ++i)
{
w[i] /= sum;
}
}
}
return numPts;
}
//----------------------------------------------------------------------------
void vtkLinearKernel::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
}
|
