Mercurial > hg > kwantix

annotate src/vtkplot.cpp @ 31:9a2279c9d003

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Minor issues with stray namespace changes
author Jordi Gutiérrez Hermoso <jordigh@gmail.com>
date Wed, 03 Feb 2010 19:40:34 -0600
parents 24f3c4ed5c84
children 22f78a6faa3e
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1 #include <vtkPoints.h>
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2 #include <vtkPointData.h>
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3 #include <vtkDelaunay2D.h>
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4 #include <vtkLookupTable.h>
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5
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6 #include <vtkPolyData.h>
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7 #include <vtkPolyDataNormals.h>
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8 #include <vtkPolyDataMapper.h>
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10 #include <vtkWarpScalar.h>
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12 #include <vtkCamera.h>
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13 #include <vtkActor.h>
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14 #include <vtkRenderWindow.h>
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15 #include <vtkRenderWindowInteractor.h>
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16 #include <vtkRenderer.h>
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17
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18 #include <vtkInteractorStyleTerrain.h>
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19
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20 #include <vtkSmartPointer.h>
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21 #include <vtkDoubleArray.h>
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22
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23 #include <vtkGraphicsFactory.h>
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24 #include <vtkImagingFactory.h>
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25 #include <vtkWindowToImageFilter.h>
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26 #include <vtkPNGWriter.h>
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27
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28 #include <string>
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29 using std::string;
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30
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31 #include "include/linalg.hpp"
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32
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33 typedef double (*Func3d)(double, double);
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34
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35 void InitOffscreen(bool offscreen);
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36 vtkSmartPointer<vtkDelaunay2D> TriangulateTerrain(Func3d func);
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37
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38 void PlotPoints(vtkSmartPointer<vtkDelaunay2D> delaunay,
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39 bool offscreen=true,
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40 const string& filename="vtkscreenshot.png");
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41
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42 double F(double x, double y)
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43 {
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44 return atan(x*y*sin(y));
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45 }
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46
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47 int main (int argc, char ** argv)
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48 {
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49 auto delaunay = TriangulateTerrain(&F);
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50 PlotPoints(delaunay,true);
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51 return 0;
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52 }
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53
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54 void InitOffscreen(bool offscreen)
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55 {
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56 // Graphics Factory
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57 vtkSmartPointer<vtkGraphicsFactory> graphics_factory
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58 = vtkGraphicsFactory::New();
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59 graphics_factory->SetOffScreenOnlyMode( offscreen );
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60 graphics_factory->SetUseMesaClasses( offscreen );
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61
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62 // Imaging Factory
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63 vtkSmartPointer<vtkImagingFactory> imaging_factory
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64 = vtkImagingFactory::New();
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65 imaging_factory->SetUseMesaClasses( offscreen );
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66 }
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67
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68 vtkSmartPointer<vtkDelaunay2D> TriangulateTerrain(Func3d func)
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69 {
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70
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71 vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
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72 vtkSmartPointer<vtkDoubleArray> scalars = vtkSmartPointer<vtkDoubleArray>::New();
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73
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74 unsigned int GridSize = 50;
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75 for(double x = -3; x < 3; x += 6.0/GridSize)
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76 {
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77 for(double y = -3; y < 3; y += 6.0/GridSize)
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78 {
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79 double z = func(x,y);
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80 vtkIdType idx = points->InsertNextPoint(x, y, z);
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81 scalars -> InsertTuple(idx, &z);
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82 }
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83 }
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84
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85 //add the grid points to a polydata object
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86 vtkSmartPointer<vtkPolyData> polydata = vtkPolyData::New();
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87 polydata->SetPoints(points);
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88 polydata->GetPointData() -> SetScalars(scalars);
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89
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90 //triangulate the grid points
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91 vtkSmartPointer<vtkDelaunay2D> delaunay = vtkDelaunay2D::New();
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92 delaunay->SetInput(polydata);
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93 delaunay->Update();
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94
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95 return delaunay;
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96 }
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97
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98 void PlotPoints(vtkSmartPointer<vtkDelaunay2D> delaunay,
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99 bool offscreen,
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100 const string& filename)
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101 {
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102 InitOffscreen(offscreen);
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103
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104 //Normals for Gourad shading
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105 vtkSmartPointer<vtkPolyDataNormals> normals = vtkPolyDataNormals::New();
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106 normals -> SetInputConnection(delaunay ->GetOutputPort() );
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107 normals -> SetFeatureAngle(60);
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108
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109 //Set the colours for the rendering
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110 vtkSmartPointer<vtkLookupTable> lut = vtkLookupTable::New();
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111 lut -> SetHueRange(0.66667, 0.0);
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112 lut -> SetNumberOfColors(256);
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113 lut -> SetRampToLinear();
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114 lut -> Build();
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115
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116
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117 // map the contours to graphical primitives
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118 vtkSmartPointer<vtkPolyDataMapper> contMapper = vtkPolyDataMapper::New();
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119 contMapper->SetInput(normals -> GetOutput() );
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120 contMapper->SetScalarRange(0,1);
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121 contMapper->SetLookupTable(lut);
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122 contMapper->ImmediateModeRenderingOn();
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123
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124
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125 // create an actor for the contours
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126 vtkSmartPointer<vtkActor> contActor = vtkActor::New();
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127 contActor->SetMapper(contMapper);
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128
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129 // a renderer and render window
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130 vtkSmartPointer<vtkRenderer> ren1 = vtkRenderer::New();
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131 vtkSmartPointer<vtkRenderWindow> renWin = vtkRenderWindow::New();
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132 if(offscreen)
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133 {
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134 renWin->SetOffScreenRendering(1);
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135 }
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136 renWin->AddRenderer(ren1);
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137
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138 // an interactor
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139 vtkSmartPointer<vtkRenderWindowInteractor> iren
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140 = vtkRenderWindowInteractor::New();
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141 iren->SetRenderWindow(renWin);
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142
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143 // add the actors to the scene
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144 ren1->SetBackground(0.0,0.0,0.0);
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145 ren1->GetActiveCamera()->SetViewUp(0,0,1);
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146 ren1->GetActiveCamera()->SetPosition(1, 1, 1);
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147 ren1->GetActiveCamera()->SetParallelProjection(1);
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148 ren1->AddActor(contActor);
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149 ren1->ResetCamera();
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150
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151 // render an image (lights and cameras are created automatically)
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152 renWin->Render();
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153
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154 if(offscreen)
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155 {
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156 // Write to file
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157 vtkSmartPointer<vtkWindowToImageFilter> windowToImageFilter =
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158 vtkSmartPointer<vtkWindowToImageFilter>::New();
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159 windowToImageFilter->SetInput(renWin);
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160 windowToImageFilter->Update();
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161
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162 vtkSmartPointer<vtkPNGWriter> writer = vtkSmartPointer<vtkPNGWriter>::New();
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163 writer->SetFileName(filename.c_str());
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164 writer->SetInput(windowToImageFilter->GetOutput());
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165 writer->Write();
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166 }
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167 else
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168 {
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169 //The style
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170 vtkSmartPointer<vtkInteractorStyleTerrain> terrain_style
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171 = vtkInteractorStyleTerrain::New();
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172
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173 // Set the style
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174 iren -> SetInteractorStyle(terrain_style);
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175
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176 // begin mouse interaction
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177 iren->Start();
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178 }
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179 }