1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*=========================================================================
Program: Visualization Toolkit
Module: PlotSPHKernels.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// Plot the SPH kernel functions and derivatives.
#include "vtkSmartPointer.h"
#include "vtkSPHCubicKernel.h"
#include "vtkSPHQuarticKernel.h"
#include "vtkSPHQuinticKernel.h"
#include "vtkWendlandQuinticKernel.h"
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderWindow.h>
#include <vtkSmartPointer.h>
#include <vtkChartXY.h>
#include <vtkAxis.h>
#include <vtkTable.h>
#include <vtkPlot.h>
#include <vtkFloatArray.h>
#include <vtkContextView.h>
#include <vtkContextScene.h>
#include <vtkPen.h>
//-----------------------------------------------------------------------------
// Helper function
template <class T>
void AddKernelToPlot(vtkSmartPointer<T> kernel, vtkSmartPointer<vtkChartXY> chart,
const std::string &description,
vtkSmartPointer<vtkTable> table, unsigned char rgb[3])
{
double r, width = 3.5;
int res = 100;
double inc = width / static_cast<double>(res);
double fVal, dVal;
int numCols = table->GetNumberOfColumns();
numCols = ( numCols < 1 ? 1 : numCols);
vtkSmartPointer<vtkFloatArray> arrX =
vtkSmartPointer<vtkFloatArray>::New();
arrX->SetName("X Axis");
arrX->SetNumberOfValues(res);
table->AddColumn(arrX);
vtkSmartPointer<vtkFloatArray> arrC =
vtkSmartPointer<vtkFloatArray>::New();
arrC->SetName(description.c_str());
arrC->SetNumberOfValues(res);
table->AddColumn(arrC);
std::string deriv = description + "_deriv";
vtkSmartPointer<vtkFloatArray> arrS =
vtkSmartPointer<vtkFloatArray>::New();
arrS->SetName(deriv.c_str());
arrS->SetNumberOfValues(res);
table->AddColumn(arrS);
// Fill in the table with function values
table->SetNumberOfRows(res);
for (int i=0; i < res; ++i)
{
r = static_cast<double>(i) * inc;
fVal = kernel->GetNormFactor() * kernel->ComputeFunctionWeight(r);
dVal = kernel->GetNormFactor() * kernel->ComputeDerivWeight(r);
table->SetValue(i, 0, r);
table->SetValue(i, numCols, fVal);
table->SetValue(i, numCols+1, dVal);
}
vtkPlot *line = chart->AddPlot(vtkChart::LINE);
line->SetInputData(table, 0, numCols);
line->SetColor(rgb[0], rgb[1], rgb[2], 255);
line->SetWidth(1.0);
line = chart->AddPlot(vtkChart::LINE);
line->SetInputData(table, 0, numCols+1);
line->SetColor(rgb[0], rgb[1], rgb[2], 255);
line->SetWidth(1.0);
}
//-----------------------------------------------------------------------------
int PlotSPHKernels(int, char*[])
{
// Set up the view
vtkSmartPointer<vtkContextView> view =
vtkSmartPointer<vtkContextView>::New();
view->GetRenderWindow()->SetSize(400,300);
view->GetRenderer()->SetBackground(1.0, 1.0, 1.0);
// Add multiple line plots, setting the colors etc
vtkSmartPointer<vtkChartXY> chart =
vtkSmartPointer<vtkChartXY>::New();
chart->SetTitle("SPH Kernels");
chart->SetShowLegend(true);
view->GetScene()->AddItem(chart);
// Create a table which will contain the plots
vtkSmartPointer<vtkTable> table =
vtkSmartPointer<vtkTable>::New();
unsigned char rgb[3];
// We will approach the kernel from beyond the cutoff distance and plot the
// function and derivative values.
// Cubic SPH Kernel
vtkSmartPointer<vtkSPHCubicKernel> cubic =
vtkSmartPointer<vtkSPHCubicKernel>::New();
cubic->SetDimension(2);
cubic->SetSpatialStep(1.0);
cubic->Initialize(NULL,NULL,NULL);
rgb[0] = 255; rgb[1] = 0; rgb[2] = 0;
AddKernelToPlot<vtkSPHCubicKernel>(cubic, chart, "Cubic", table, rgb);
// Quartic Kernel
vtkSmartPointer<vtkSPHQuarticKernel> quartic =
vtkSmartPointer<vtkSPHQuarticKernel>::New();
quartic->SetDimension(2);
quartic->SetSpatialStep(1.0);
quartic->Initialize(NULL,NULL,NULL);
rgb[0] = 0; rgb[1] = 255; rgb[2] = 0;
AddKernelToPlot<vtkSPHQuarticKernel>(quartic, chart, "Quartic", table, rgb);
// Quintic Kernel
vtkSmartPointer<vtkSPHQuinticKernel> quintic =
vtkSmartPointer<vtkSPHQuinticKernel>::New();
quintic->SetDimension(2);
quintic->SetSpatialStep(1.0);
quintic->Initialize(NULL,NULL,NULL);
rgb[0] = 0; rgb[1] = 0; rgb[2] = 255;
AddKernelToPlot<vtkSPHQuinticKernel>(quintic, chart, "Quintic", table, rgb);
// Wendland C2 (quintic) Kernel
vtkSmartPointer<vtkWendlandQuinticKernel> wendland =
vtkSmartPointer<vtkWendlandQuinticKernel>::New();
wendland->SetDimension(2);
wendland->SetSpatialStep(1.0);
wendland->Initialize(NULL,NULL,NULL);
rgb[0] = 255; rgb[1] = 0; rgb[2] = 255;
AddKernelToPlot<vtkWendlandQuinticKernel>(wendland, chart, "Wendland", table, rgb);
vtkAxis *left = chart->GetAxis(vtkAxis::LEFT);
vtkAxis *bottom = chart->GetAxis(vtkAxis::BOTTOM);
left->SetTitle("Kernel Value");
bottom->SetTitle("r/h");
// Start interactor
view->GetInteractor()->Initialize();
view->GetInteractor()->Start();
return EXIT_SUCCESS;
}
|
