VTK
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 =========================================================================*/
37 #ifndef vtkSPHQuarticKernel_h
38 #define vtkSPHQuarticKernel_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 vtkSPHQuarticKernel : public vtkSPHKernel
48 {
49 public:
51 
54  static vtkSPHQuarticKernel* 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 = 2.5 - std::min(d, 2.5);
72  double tmp2 = 1.5 - std::min(d, 1.5);
73  double tmp3 = 0.5 - std::min(d, 0.5);
74  return (tmp1 * tmp1 * tmp1 * tmp1 - 5.0 * tmp2 * tmp2 * tmp2 * tmp2 +
75  10.0 * tmp3 * tmp3 * tmp3 * tmp3);
76  }
78 
80 
84  double ComputeDerivWeight(const double d) override
85  {
86  double tmp1 = 2.5 - std::min(d, 2.5);
87  double tmp2 = 1.5 - std::min(d, 1.5);
88  double tmp3 = 0.5 - std::min(d, 0.5);
89  return (-4.0 * tmp1 * tmp1 * tmp1 + 20.0 * tmp2 * tmp2 * tmp2 - 40.0 * tmp3 * tmp3 * tmp3);
90  }
92 
93 protected:
95  ~vtkSPHQuarticKernel() override;
96 
97 private:
99  void operator=(const vtkSPHQuarticKernel&) = delete;
100 };
101 
102 #endif
vtkSPHQuarticKernel::ComputeFunctionWeight
double ComputeFunctionWeight(const double d) override
Compute weighting factor given a normalized distance from a sample point.
Definition: vtkSPHQuarticKernel.h:69
vtkPointData
represent and manipulate point attribute data
Definition: vtkPointData.h:31
vtkSPHQuarticKernel
a quartic SPH interpolation kernel
Definition: vtkSPHQuarticKernel.h:47
vtkObject::New
static vtkObject * New()
Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
vtkSPHKernel::Initialize
void Initialize(vtkAbstractPointLocator *loc, vtkDataSet *ds, vtkPointData *pd) override
Produce the computational parameters for the kernel.
vtkSPHKernel.h
vtkSPHQuarticKernel::ComputeDerivWeight
double ComputeDerivWeight(const double d) override
Compute weighting factor for derivative quantities given a normalized distance from a sample point.
Definition: vtkSPHQuarticKernel.h:84
vtkIndent
a simple class to control print indentation
Definition: vtkIndent.h:33
vtkIdList
list of point or cell ids
Definition: vtkIdList.h:30
vtkSPHKernel
a family of SPH interpolation kernels
Definition: vtkSPHKernel.h:67
vtkDataSet
abstract class to specify dataset behavior
Definition: vtkDataSet.h:56
vtkAbstractPointLocator
abstract class to quickly locate points in 3-space
Definition: vtkAbstractPointLocator.h:38
vtkDoubleArray
dynamic, self-adjusting array of double
Definition: vtkDoubleArray.h:35
vtkSPHKernel::PrintSelf
void PrintSelf(ostream &os, vtkIndent indent) override
Methods invoked by print to print information about the object including superclasses.