VTK学习笔记（十二）画图，PlotArea

这个例子演示了vtkPlotArea，它在两条曲线之间绘制填充区域。该示例使用有效的掩码来选择定义要绘制的区域的值。

该示例还展示了如何控制情节组件的大小和颜色。

运行效果

#include 
#include #include #include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include #include 
//----------------------------------------------------------------------------
#include 
VTK_MODULE_INIT(vtkRenderingOpenGL2);
VTK_MODULE_INIT(vtkInteractionStyle);
VTK_MODULE_INIT(vtkRenderingContextOpenGL2);   //这里编译时选择的是default，要改成yesint main(int, char*[])
{vtkNew colors;// Set up a 2D scene, add an XY chart to itvtkNew view;view->GetRenderWindow()->SetSize(640, 480);view->GetRenderWindow()->SetWindowName("AreaPlot");vtkNew chart;chart->SetTitle("Area Plot");chart->GetTitleProperties()->SetFontSize(36);chart->GetTitleProperties()->SetColor(colors->GetColor3d("Banana").GetData());chart->GetAxis(0)->GetTitleProperties()->SetFontSize(24);chart->GetAxis(0)->GetTitleProperties()->SetColor(colors->GetColor3d("orange").GetData());chart->GetAxis(0)->GetLabelProperties()->SetColor(colors->GetColor3d("beige").GetData());chart->GetAxis(0)->GetLabelProperties()->SetFontSize(18);chart->GetAxis(1)->GetTitleProperties()->SetFontSize(24);chart->GetAxis(1)->GetTitleProperties()->SetColor(colors->GetColor3d("orange").GetData());chart->GetAxis(1)->GetLabelProperties()->SetColor(colors->GetColor3d("beige").GetData());chart->GetAxis(1)->GetLabelProperties()->SetFontSize(18);view->GetScene()->AddItem(chart);// Create a table with some points in it...vtkNew table;vtkNew arrX;arrX->SetName("X Axis");table->AddColumn(arrX);vtkNew arrC;arrC->SetName("Cosine");table->AddColumn(arrC);vtkNew arrS;arrS->SetName("Sine");table->AddColumn(arrS);vtkNew arrS2;arrS2->SetName("Sine2");table->AddColumn(arrS2);vtkNew arrS3;arrS3->SetName("Sine3");table->AddColumn(arrS3);vtkNew arr1;arr1->SetName("One");table->AddColumn(arr1);vtkNew validMask;validMask->SetName("ValidMask");table->AddColumn(validMask);// Test charting with a few more points...int numPoints = 69;float inc = 7.5 / (numPoints - 1);table->SetNumberOfRows(numPoints);for (int i = 0; i < numPoints; ++i){table->SetValue(i, 0, i * inc + 0.01);table->SetValue(i, 1, cos(i * inc) + 0.01);table->SetValue(i, 2, sin(i * inc) + 0.01);table->SetValue(i, 3, sin(i * inc) + 0.5);table->SetValue(i, 4, sin(i * inc) * sin(i * inc) + 0.01);table->SetValue(i, 5, 1.0);validMask->SetValue(i, (i > 30 && i < 40) ? 0 : 1);   //这里是设置掩码值的地方}// Add multiple line plots, setting the colors etcvtkColor3d color3d = colors->GetColor3d("tomato");vtkPlotArea* area =dynamic_cast(chart->AddPlot(vtkChart::AREA));area->SetInputData(table);area->SetInputArray(0, "X Axis");area->SetInputArray(1, "Sine");area->SetInputArray(2, "Sine2");area->SetValidPointMaskName("ValidMask");area->GetBrush()->SetColorF(color3d.GetRed(), color3d.GetGreen(),color3d.GetBlue(), .6);chart->GetAxis(vtkAxis::LEFT)->SetLogScale(true);// Render the scene and compare the image to a reference imageview->GetRenderer()->SetBackground(colors->GetColor3d("SlateGray").GetData());view->GetRenderWindow()->SetMultiSamples(0);view->GetRenderWindow()->Render();view->GetInteractor()->Initialize();view->GetInteractor()->Start();return EXIT_SUCCESS;
}

其中VTK9.0.1默认不编译RenderingContextOpenGL2这个库，需要重新选择，然后编译一下。

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