VTK  9.2.5
vtkSPHQuarticKernel.h
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1/*=========================================================================
2
3 Program: Visualization Toolkit
4 Module: vtkSPHQuarticKernel.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 vtkSPHQuarticKernel_h
41#define vtkSPHQuarticKernel_h
42
43#include "vtkFiltersPointsModule.h" // For export macro
44#include "vtkSPHKernel.h"
45#include <algorithm> // For std::min()
46
47class vtkIdList;
48class vtkDoubleArray;
49
50class VTKFILTERSPOINTS_EXPORT vtkSPHQuarticKernel : public vtkSPHKernel
51{
52public:
54
59 void PrintSelf(ostream& os, vtkIndent indent) override;
61
67
69
72 double ComputeFunctionWeight(const double d) override
73 {
74 double tmp1 = 2.5 - std::min(d, 2.5);
75 double tmp2 = 1.5 - std::min(d, 1.5);
76 double tmp3 = 0.5 - std::min(d, 0.5);
77 return (tmp1 * tmp1 * tmp1 * tmp1 - 5.0 * tmp2 * tmp2 * tmp2 * tmp2 +
78 10.0 * tmp3 * tmp3 * tmp3 * tmp3);
79 }
81
83
87 double ComputeDerivWeight(const double d) override
88 {
89 double tmp1 = 2.5 - std::min(d, 2.5);
90 double tmp2 = 1.5 - std::min(d, 1.5);
91 double tmp3 = 0.5 - std::min(d, 0.5);
92 return (-4.0 * tmp1 * tmp1 * tmp1 + 20.0 * tmp2 * tmp2 * tmp2 - 40.0 * tmp3 * tmp3 * tmp3);
93 }
95
96protected:
99
100private:
102 void operator=(const vtkSPHQuarticKernel&) = delete;
103};
104
105#endif
abstract class to quickly locate points in 3-space
abstract class to specify dataset behavior
Definition: vtkDataSet.h:63
dynamic, self-adjusting array of double
list of point or cell ids
Definition: vtkIdList.h:34
a simple class to control print indentation
Definition: vtkIndent.h:40
represent and manipulate point attribute data
Definition: vtkPointData.h:42
a family of SPH interpolation kernels
Definition: vtkSPHKernel.h:68
a quartic SPH interpolation kernel
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 ComputeFunctionWeight(const double d) override
Compute weighting factor given a normalized distance from a sample point.
static vtkSPHQuarticKernel * New()
Standard methods for instantiation, obtaining type information, and printing.
~vtkSPHQuarticKernel() override
double ComputeDerivWeight(const double d) override
Compute weighting factor for derivative quantities given a normalized distance from a sample point.