VTK
vtkSPHQuarticKernel.h
Go to the documentation of this file.
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 
47 class vtkIdList;
48 class vtkDoubleArray;
49 
50 
51 class VTKFILTERSPOINTS_EXPORT vtkSPHQuarticKernel : public vtkSPHKernel
52 {
53 public:
55 
58  static vtkSPHQuarticKernel *New();
60  void PrintSelf(ostream& os, vtkIndent indent) override;
62 
68  vtkPointData *pd) override;
69 
71 
74  double ComputeFunctionWeight(const double d) override
75  {
76  double tmp1 = 2.5 - std::min(d,2.5);
77  double tmp2 = 1.5 - std::min(d,1.5);
78  double tmp3 = 0.5 - std::min(d,0.5);
79  return (tmp1*tmp1*tmp1*tmp1 - 5.0*tmp2*tmp2*tmp2*tmp2 +
80  10.0*tmp3*tmp3*tmp3*tmp3);
81  }
83 
85 
89  double ComputeDerivWeight(const double d) override
90  {
91  double tmp1 = 2.5 - std::min(d,2.5);
92  double tmp2 = 1.5 - std::min(d,1.5);
93  double tmp3 = 0.5 - std::min(d,0.5);
94  return (-4.0*tmp1*tmp1*tmp1 + 20.0*tmp2*tmp2*tmp2 - 40.0*tmp3*tmp3*tmp3);
95  }
97 
98 protected:
100  ~vtkSPHQuarticKernel() override;
101 
102 private:
103  vtkSPHQuarticKernel(const vtkSPHQuarticKernel&) = delete;
104  void operator=(const vtkSPHQuarticKernel&) = delete;
105 };
106 
107 #endif
represent and manipulate point attribute data
Definition: vtkPointData.h:37
abstract class to specify dataset behavior
Definition: vtkDataSet.h:62
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:39
double ComputeDerivWeight(const double d) override
Compute weighting factor for derivative quantities given a normalized distance from a sample point...
abstract class to quickly locate points in 3-space
list of point or cell ids
Definition: vtkIdList.h:36
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.
a quartic SPH interpolation kernel
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:68