VTK  9.4.20250306
vtkSPHCubicKernel.h
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1// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
2// SPDX-License-Identifier: BSD-3-Clause
28#ifndef vtkSPHCubicKernel_h
29#define vtkSPHCubicKernel_h
30
31#include "vtkFiltersPointsModule.h" // For export macro
32#include "vtkSPHKernel.h"
33#include <algorithm> // For std::min()
34
35VTK_ABI_NAMESPACE_BEGIN
36class vtkIdList;
37class vtkDoubleArray;
38
39class VTKFILTERSPOINTS_EXPORT vtkSPHCubicKernel : public vtkSPHKernel
40{
41public:
43
48 void PrintSelf(ostream& os, vtkIndent indent) override;
50
56
58
61 double ComputeFunctionWeight(const double d) override
62 {
63 double tmp1 = 2.0 - (std::min)(d, 2.0);
64 double tmp2 = 1.0 - (std::min)(d, 1.0);
65 return (0.25 * tmp1 * tmp1 * tmp1 - tmp2 * tmp2 * tmp2);
66 }
68
70
74 double ComputeDerivWeight(const double d) override
75 {
76 double tmp1 = 2.0 - (std::min)(d, 2.0);
77 double tmp2 = 1.0 - (std::min)(d, 1.0);
78 return (-0.75 * tmp1 * tmp1 + 3.0 * tmp2 * tmp2);
79 }
81
82protected:
85
86private:
87 vtkSPHCubicKernel(const vtkSPHCubicKernel&) = delete;
88 void operator=(const vtkSPHCubicKernel&) = delete;
89};
90
91VTK_ABI_NAMESPACE_END
92#endif
abstract class to quickly locate points in 3-space
abstract class to specify dataset behavior
Definition vtkDataSet.h:165
dynamic, self-adjusting array of double
list of point or cell ids
Definition vtkIdList.h:133
a simple class to control print indentation
Definition vtkIndent.h:108
represent and manipulate point attribute data
a cubic SPH interpolation kernel
double ComputeFunctionWeight(const double d) override
Compute weighting factor given a normalized distance from a sample point.
~vtkSPHCubicKernel() override
static vtkSPHCubicKernel * New()
Standard methods for instantiation, obtaining type information, and printing.
void PrintSelf(ostream &os, vtkIndent indent) override
Standard methods for instantiation, obtaining type information, and printing.
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.
a family of SPH interpolation kernels