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 =========================================================================*/
37 #ifndef vtkWendlandQuinticKernel_h
38 #define vtkWendlandQuinticKernel_h
39 
40 #include "vtkFiltersPointsModule.h" // For export macro
41 #include "vtkSPHKernel.h"
42 #include <algorithm> // For std::min()
43 
44 class vtkIdList;
45 class vtkDoubleArray;
46 
47 
48 class VTKFILTERSPOINTS_EXPORT vtkWendlandQuinticKernel : public vtkSPHKernel
49 {
50 public:
52 
55  static vtkWendlandQuinticKernel *New();
57  void PrintSelf(ostream& os, vtkIndent indent) override;
59 
65  vtkPointData *pd) override;
66 
68 
73  double ComputeFunctionWeight(const double d) override
74  {
75  if ( d >= 2.0 )
76  {
77  return 0.0;
78  }
79  else
80  {
81  double tmp = 1.0 - 0.5*d;
82  return (tmp*tmp*tmp*tmp) * (1.0 + 2.0*d);
83  }
84  }
86 
88 
92  double ComputeDerivWeight(const double d) override
93  {
94  if ( d >= 2.0 )
95  {
96  return 0.0;
97  }
98  else
99  {
100  double tmp = 1.0 - 0.5*d;
101  return -2.0*(tmp*tmp*tmp) * (1.0 + 2.0*d) +
102  2.0*(tmp*tmp*tmp*tmp);
103  }
104  }
106 
107 protected:
109  ~vtkWendlandQuinticKernel() override;
110 
111 private:
113  void operator=(const vtkWendlandQuinticKernel&) = delete;
114 };
115 
116 #endif
vtkPointData
represent and manipulate point attribute data
Definition: vtkPointData.h:31
vtkObject::New
static vtkObject * New()
Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
vtkSPHKernel::Initialize
void Initialize(vtkAbstractPointLocator *loc, vtkDataSet *ds, vtkPointData *pd) override
Produce the computational parameters for the kernel.
vtkSPHKernel.h
vtkWendlandQuinticKernel::ComputeFunctionWeight
double ComputeFunctionWeight(const double d) override
Compute weighting factor given a normalized distance from a sample point.
Definition: vtkWendlandQuinticKernel.h:73
vtkWendlandQuinticKernel
a quintic SPH interpolation kernel
Definition: vtkWendlandQuinticKernel.h:48
vtkIndent
a simple class to control print indentation
Definition: vtkIndent.h:33
vtkIdList
list of point or cell ids
Definition: vtkIdList.h:30
vtkSPHKernel
a family of SPH interpolation kernels
Definition: vtkSPHKernel.h:68
vtkDataSet
abstract class to specify dataset behavior
Definition: vtkDataSet.h:56
vtkWendlandQuinticKernel::ComputeDerivWeight
double ComputeDerivWeight(const double d) override
Compute weighting factor for derivative quantities given a normalized distance from a sample point.
Definition: vtkWendlandQuinticKernel.h:92
vtkAbstractPointLocator
abstract class to quickly locate points in 3-space
Definition: vtkAbstractPointLocator.h:38
vtkDoubleArray
dynamic, self-adjusting array of double
Definition: vtkDoubleArray.h:35
vtkSPHKernel::PrintSelf
void PrintSelf(ostream &os, vtkIndent indent) override
Methods invoked by print to print information about the object including superclasses.