VTK  9.0.1
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 class VTKFILTERSPOINTS_EXPORT vtkWendlandQuinticKernel : public vtkSPHKernel
48 {
49 public:
51 
56  void PrintSelf(ostream& os, vtkIndent indent) override;
58 
64 
66 
71  double ComputeFunctionWeight(const double d) override
72  {
73  if (d >= 2.0)
74  {
75  return 0.0;
76  }
77  else
78  {
79  double tmp = 1.0 - 0.5 * d;
80  return (tmp * tmp * tmp * tmp) * (1.0 + 2.0 * d);
81  }
82  }
84 
86 
90  double ComputeDerivWeight(const double d) override
91  {
92  if (d >= 2.0)
93  {
94  return 0.0;
95  }
96  else
97  {
98  double tmp = 1.0 - 0.5 * d;
99  return -2.0 * (tmp * tmp * tmp) * (1.0 + 2.0 * d) + 2.0 * (tmp * tmp * tmp * tmp);
100  }
101  }
103 
104 protected:
107 
108 private:
110  void operator=(const vtkWendlandQuinticKernel&) = delete;
111 };
112 
113 #endif
abstract class to quickly locate points in 3-space
abstract class to specify dataset behavior
Definition: vtkDataSet.h:57
dynamic, self-adjusting array of double
list of point or cell ids
Definition: vtkIdList.h:31
a simple class to control print indentation
Definition: vtkIndent.h:34
represent and manipulate point attribute data
Definition: vtkPointData.h:32
a family of SPH interpolation kernels
Definition: vtkSPHKernel.h:68
a quintic SPH interpolation kernel
void Initialize(vtkAbstractPointLocator *loc, vtkDataSet *ds, vtkPointData *pd) override
Produce the computational parameters for the kernel.
double ComputeDerivWeight(const double d) override
Compute weighting factor for derivative quantities given a normalized distance from a sample point.
static vtkWendlandQuinticKernel * New()
Standard methods for instantiation, obtaining type information, and printing.
~vtkWendlandQuinticKernel() override
double ComputeFunctionWeight(const double d) override
Compute weighting factor given a normalized distance from a sample point.
void PrintSelf(ostream &os, vtkIndent indent) override
Methods invoked by print to print information about the object including superclasses.