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=========================================================================*/
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
50
51class VTKFILTERSPOINTS_EXPORT vtkSPHQuarticKernel : public vtkSPHKernel
52{
53public:
55
60 void PrintSelf(ostream& os, vtkIndent indent);
62
68 vtkPointData *pd);
69
71
74 virtual double ComputeFunctionWeight(const double d)
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 virtual double ComputeDerivWeight(const double d)
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
98protected:
101
102private:
103 vtkSPHQuarticKernel(const vtkSPHQuarticKernel&) VTK_DELETE_FUNCTION;
104 void operator=(const vtkSPHQuarticKernel&) VTK_DELETE_FUNCTION;
105};
106
107#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:37
a simple class to control print indentation
Definition: vtkIndent.h:40
represent and manipulate point attribute data
Definition: vtkPointData.h:38
a family of SPH interpolation kernels
Definition: vtkSPHKernel.h:69
a quartic SPH interpolation kernel
static vtkSPHQuarticKernel * New()
Standard methods for instantiation, obtaining type information, and printing.
virtual double ComputeFunctionWeight(const double d)
Compute weighting factor given a normalized distance from a sample point.
void PrintSelf(ostream &os, vtkIndent indent)
Methods invoked by print to print information about the object including superclasses.
virtual double ComputeDerivWeight(const double d)
Compute weighting factor for derivative quantities given a normalized distance from a sample point.
virtual void Initialize(vtkAbstractPointLocator *loc, vtkDataSet *ds, vtkPointData *pd)
Produce the computational parameters for the kernel.