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Windows 11 家庭中文版Microsoft Visual Studio Community 2019VTK-9.3.0.rc0vtk-example demo解决问题#xff1a; 创建一个带有背景图层和前景图层的渲染窗口#xff0c;知识点#xff1a;1. 画布转image#xff1b;2. 渲染图层设置#xff1b;3.…
开发环境
Windows 11 家庭中文版Microsoft Visual Studio Community 2019VTK-9.3.0.rc0vtk-example demo解决问题 创建一个带有背景图层和前景图层的渲染窗口知识点1. 画布转image2. 渲染图层设置3. 相机位置、焦点、距离等属性设置 构造imageData对象程序检查是否提供了输入图像文件名。如果提供了则使用VTK库中的vtkImageReader2类来读取图像数据并将其存储在imageData对象中。如果没有提供则创建一个带有三种颜色的矩形图像。程序使用vtkImageCanvasSource2D类来创建一个画布并使用其FillBox、FillTriangle和FillTube方法在画布上绘制三种颜色的形状。然后使用canvasSource-GetOutput()方法获取画布上的图像数据并将其存储在imageData对象中。 创建了一个vtkImageActor对象imageActor并将其设置为显示imageData中的图像数据。然后程序创建了一个vtkRenderer对象backgroundRenderer并将其设置为显示imageActor中的图像数据。程序还创建了一个vtkSuperquadricSource对象superquadricSource并使用其SetPhiRoundness和SetThetaRoundness方法设置超椭球体的形状。然后程序创建了vtkPolyDataMapper和vtkActor对象来显示超椭球体并使用colors-GetColor3d方法设置超椭球体的颜色。 程序创建了一个vtkRenderer对象sceneRenderer并将其设置为显示超椭球体。然后程序创建了一个vtkRenderWindow对象renderWindow并将其设置为显示backgroundRenderer和sceneRenderer中的内容。程序还使用renderWindow-SetWindowName方法设置窗口名称。 创建了一个vtkRenderWindowInteractor对象renderWindowInteractor并使用renderWindowInteractor-SetRenderWindow方法将其与renderWindow关联。然后程序将超椭球体添加到sceneRenderer中将imageActor添加到backgroundRenderer中。 程序调用renderWindow-Render方法以确定背景相机的位置。程序使用imageData-GetOrigin、imageData-GetSpacing和imageData-GetExtent方法获取图像数据的原点、间距和范围等信息。然后程序设置相机的位置、焦点和平行比例等参数以使背景相机填充渲染器中的图像。 prj name: BackgroundImage
#include vtkActor.h
#include vtkCamera.h
#include vtkImageActor.h
#include vtkImageCanvasSource2D.h
#include vtkImageData.h
#include vtkImageReader2.h
#include vtkImageReader2Factory.h
#include vtkNamedColors.h
#include vtkNew.h
#include vtkPolyDataMapper.h
#include vtkProperty.h
#include vtkRenderWindow.h
#include vtkRenderWindowInteractor.h
#include vtkRenderer.h
#include vtkSmartPointer.h
#include vtkSuperquadricSource.h#include arrayint main(int argc, char* argv[])
{vtkNewvtkNamedColors colors;vtkSmartPointervtkImageData imageData;// Verify input arguments.if (argc 1){// Read the imagevtkNewvtkImageReader2Factory readerFactory;vtkSmartPointervtkImageReader2 imageReader;imageReader.TakeReference(readerFactory-CreateImageReader2(argv[1]));imageReader-SetFileName(argv[1]);imageReader-Update();imageData imageReader-GetOutput();}else{std::arraydouble, 3 drawColor1{0, 0, 0};std::arraydouble, 3 drawColor2{0, 0, 0};std::arraydouble, 3 drawColor3{0, 0, 0};auto color1 colors-GetColor3ub(warm_grey).GetData();auto color2 colors-GetColor3ub(DarkCyan).GetData();auto color3 colors-GetColor3ub(LightCoral).GetData();for (auto i 0; i 3; i){drawColor1[i] color1[i];drawColor2[i] color2[i];drawColor3[i] color3[i];}vtkNewvtkImageCanvasSource2D canvasSource;canvasSource-SetExtent(0, 100, 0, 100, 0, 0);canvasSource-SetScalarTypeToUnsignedChar();canvasSource-SetNumberOfScalarComponents(3);canvasSource-SetDrawColor(drawColor1.data());canvasSource-FillBox(0, 100, 0, 100);canvasSource-SetDrawColor(drawColor2.data());canvasSource-FillTriangle(10, 10, 25, 10, 25, 25);canvasSource-SetDrawColor(drawColor3.data());canvasSource-FillTube(75, 75, 0, 75, 5.0);canvasSource-Update();imageData canvasSource-GetOutput();}// Create an image actor to display the image.vtkNewvtkImageActor imageActor;imageActor-SetInputData(imageData);// Create a renderer to display the image in the background.vtkNewvtkRenderer backgroundRenderer;// Create a superquadric.vtkNewvtkSuperquadricSource superquadricSource;superquadricSource-SetPhiRoundness(1.1);superquadricSource-SetThetaRoundness(.2);// Create a mapper and actor.vtkNewvtkPolyDataMapper superquadricMapper;superquadricMapper-SetInputConnection(superquadricSource-GetOutputPort());vtkNewvtkActor superquadricActor;superquadricActor-SetMapper(superquadricMapper);superquadricActor-GetProperty()-SetColor(colors-GetColor3d(NavajoWhite).GetData());vtkNewvtkRenderer sceneRenderer;vtkNewvtkRenderWindow renderWindow;// Set up the render window and renderers such that there is// a background layer and a foreground layer.backgroundRenderer-SetLayer(0);backgroundRenderer-InteractiveOff();sceneRenderer-SetLayer(1);renderWindow-SetNumberOfLayers(2);renderWindow-AddRenderer(backgroundRenderer);renderWindow-AddRenderer(sceneRenderer);renderWindow-SetWindowName(BackgroundImage);vtkNewvtkRenderWindowInteractor renderWindowInteractor;renderWindowInteractor-SetRenderWindow(renderWindow);// Add actors to the rendererssceneRenderer-AddActor(superquadricActor);backgroundRenderer-AddActor(imageActor);// Render once to figure out where the background camera will be.renderWindow-Render();// Set up the background camera to fill the renderer with the image.double origin[3];double spacing[3];int extent[6];imageData-GetOrigin(origin);imageData-GetSpacing(spacing);imageData-GetExtent(extent);vtkCamera* camera backgroundRenderer-GetActiveCamera();camera-ParallelProjectionOn();double xc origin[0] 0.5 * (extent[0] extent[1]) * spacing[0];double yc origin[1] 0.5 * (extent[2] extent[3]) * spacing[1];// double xd (extent[1] - extent[0] 1)*spacing[0];double yd (extent[3] - extent[2] 1) * spacing[1];double d camera-GetDistance();camera-SetParallelScale(0.5 * yd);camera-SetFocalPoint(xc, yc, 0.0);camera-SetPosition(xc, yc, d);// Render again to set the correct view.renderWindow-Render();// Interact with the window.renderWindowInteractor-Start();return EXIT_SUCCESS;
}
