VTK  9.2.6
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 class VTKFILTERSPOINTS_EXPORT vtkWendlandQuinticKernel : public vtkSPHKernel
51 {
52 public:
54 
57  static vtkWendlandQuinticKernel* New();
59  void PrintSelf(ostream& os, vtkIndent indent) override;
61 
66  void Initialize(vtkAbstractPointLocator* loc, vtkDataSet* ds, vtkPointData* pd) override;
67 
69 
74  double ComputeFunctionWeight(const double d) override
75  {
76  if (d >= 2.0)
77  {
78  return 0.0;
79  }
80  else
81  {
82  double tmp = 1.0 - 0.5 * d;
83  return (tmp * tmp * tmp * tmp) * (1.0 + 2.0 * d);
84  }
85  }
87 
89 
93  double ComputeDerivWeight(const double d) override
94  {
95  if (d >= 2.0)
96  {
97  return 0.0;
98  }
99  else
100  {
101  double tmp = 1.0 - 0.5 * d;
102  return -2.0 * (tmp * tmp * tmp) * (1.0 + 2.0 * d) + 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
represent and manipulate point attribute data
Definition: vtkPointData.h:41
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:33
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:67