VTK
vtkWendlandQuinticKernel.h
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1 /*=========================================================================
2 
3  Program: Visualization Toolkit
4  Module: vtkWendlandQuinticKernel.h
5 
6  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7  All rights reserved.
8  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9 
10  This software is distributed WITHOUT ANY WARRANTY; without even
11  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12  PURPOSE. See the above copyright notice for more information.
13 
14 =========================================================================*/
40 #ifndef vtkWendlandQuinticKernel_h
41 #define vtkWendlandQuinticKernel_h
42 
43 #include "vtkFiltersPointsModule.h" // For export macro
44 #include "vtkSPHKernel.h"
45 #include <algorithm> // For std::min()
46 
47 class vtkIdList;
48 class vtkDoubleArray;
49 
50 
51 class VTKFILTERSPOINTS_EXPORT vtkWendlandQuinticKernel : public vtkSPHKernel
52 {
53 public:
55 
58  static vtkWendlandQuinticKernel *New();
60  void PrintSelf(ostream& os, vtkIndent indent) override;
62 
68  vtkPointData *pd) override;
69 
71 
76  double ComputeFunctionWeight(const double d) override
77  {
78  if ( d >= 2.0 )
79  {
80  return 0.0;
81  }
82  else
83  {
84  double tmp = 1.0 - 0.5*d;
85  return (tmp*tmp*tmp*tmp) * (1.0 + 2.0*d);
86  }
87  }
89 
91 
95  double ComputeDerivWeight(const double d) override
96  {
97  if ( d >= 2.0 )
98  {
99  return 0.0;
100  }
101  else
102  {
103  double tmp = 1.0 - 0.5*d;
104  return -2.0*(tmp*tmp*tmp) * (1.0 + 2.0*d) +
105  2.0*(tmp*tmp*tmp*tmp);
106  }
107  }
109 
110 protected:
112  ~vtkWendlandQuinticKernel() override;
113 
114 private:
116  void operator=(const vtkWendlandQuinticKernel&) = delete;
117 };
118 
119 #endif
represent and manipulate point attribute data
Definition: vtkPointData.h:37
abstract class to specify dataset behavior
Definition: vtkDataSet.h:62
a quintic SPH interpolation kernel
double ComputeFunctionWeight(const double d) override
Compute weighting factor given a normalized distance from a sample point.
dynamic, self-adjusting array of double
a simple class to control print indentation
Definition: vtkIndent.h:39
abstract class to quickly locate points in 3-space
list of point or cell ids
Definition: vtkIdList.h:36
void Initialize(vtkAbstractPointLocator *loc, vtkDataSet *ds, vtkPointData *pd) override
Produce the computational parameters for the kernel.
void PrintSelf(ostream &os, vtkIndent indent) override
Standard methods for instantiation, obtaining type information, and printing.
double ComputeDerivWeight(const double d) override
Compute weighting factor for derivative quantities given a normalized distance from a sample point...
static vtkObject * New()
Create an object with Debug turned off, modified time initialized to zero, and reference counting on...
a family of SPH interpolation kernels
Definition: vtkSPHKernel.h:68