VTK  9.0.1
vtkSPHCubicKernel.h
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1 /*=========================================================================
2 
3  Program: Visualization Toolkit
4  Module: vtkSPHCubicKernel.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 vtkSPHCubicKernel_h
38 #define vtkSPHCubicKernel_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 vtkSPHCubicKernel : public vtkSPHKernel
48 {
49 public:
51 
54  static vtkSPHCubicKernel* New();
56  void PrintSelf(ostream& os, vtkIndent indent) override;
58 
63  void Initialize(vtkAbstractPointLocator* loc, vtkDataSet* ds, vtkPointData* pd) override;
64 
66 
69  double ComputeFunctionWeight(const double d) override
70  {
71  double tmp1 = 2.0 - std::min(d, 2.0);
72  double tmp2 = 1.0 - std::min(d, 1.0);
73  return (0.25 * tmp1 * tmp1 * tmp1 - tmp2 * tmp2 * tmp2);
74  }
76 
78 
82  double ComputeDerivWeight(const double d) override
83  {
84  double tmp1 = 2.0 - std::min(d, 2.0);
85  double tmp2 = 1.0 - std::min(d, 1.0);
86  return (-0.75 * tmp1 * tmp1 + 3.0 * tmp2 * tmp2);
87  }
89 
90 protected:
92  ~vtkSPHCubicKernel() override;
93 
94 private:
95  vtkSPHCubicKernel(const vtkSPHCubicKernel&) = delete;
96  void operator=(const vtkSPHCubicKernel&) = delete;
97 };
98 
99 #endif
double ComputeDerivWeight(const double d) override
Compute weighting factor for derivative quantities given a normalized distance from a sample point...
represent and manipulate point attribute data
Definition: vtkPointData.h:31
abstract class to specify dataset behavior
Definition: vtkDataSet.h:56
a cubic 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:33
abstract class to quickly locate points in 3-space
list of point or cell ids
Definition: vtkIdList.h:30
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.
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