VTK: vtkPolyData 裁剪(1)
作者:互联网
目的:熟悉vtkClipClosedSurface 对vtkPolyData 进行裁剪;
从左到右依次为:原始PolyData,VTK自带例子裁剪结果,修改后的裁剪结果。
对比代码:重点在于如何构建裁剪平面,需要注意的是裁剪平面的法向量指向的会被保留,其它会被裁剪掉。
后续:根据用户在窗口的勾画区域对vtkPolyData 进行裁剪,难点就是如何构建重建平面组合。
// VTK自带例子
vtkNew<vtkPlane> plane1;
plane1->SetOrigin(center[0], center[1], center[2]);
plane1->SetNormal(0.0, -1.0, 0.0);
vtkNew<vtkPlane> plane2;
plane2->SetOrigin(center[0], center[1], center[2]);
plane2->SetNormal(0.0, 0.0, 1.0);
vtkNew<vtkPlane> plane3;
plane3->SetOrigin(center[0], center[1], center[2]);
plane3->SetNormal(-1.0, 0.0, 0.0);
vtkNew<vtkPlaneCollection> planes;
planes->AddItem(plane1);
planes->AddItem(plane2);
planes->AddItem(plane3);
// 修改后裁剪
double cutValue = 0.1;
vtkNew<vtkPlane> plane1;
plane1->SetOrigin(center[0]- cutValue, center[1], center[2]);
plane1->SetNormal(1.0, 0.0, 0.0);
vtkNew<vtkPlane> plane2;
plane2->SetOrigin(center[0] + cutValue, center[1], center[2]);
plane2->SetNormal(-1.0, 0.0, 0.0);
vtkNew<vtkPlane> plane3;
plane3->SetOrigin(center[0], center[1]- cutValue, center[2]);
plane3->SetNormal(0.0, 1.0, 0.0);
vtkNew<vtkPlane> plane4;
plane4->SetOrigin(center[0], center[1] + cutValue, center[2]);
plane4->SetNormal(0.0, -1.0, 0.0);
vtkNew<vtkPlaneCollection> planes;
planes->AddItem(plane1);
planes->AddItem(plane2);
planes->AddItem(plane3);
planes->AddItem(plane4);
// VTK 自带例子的学习
// https://kitware.github.io/vtk-examples/site/Cxx/Meshes/ClipClosedSurface/
void ClipClosedSurface()
{
vtkNew<vtkNamedColors> colors;
// PolyData to process
vtkSmartPointer<vtkPolyData> polyData;
// Create a sphere
vtkNew<vtkSphereSource> sphereSource;
sphereSource->SetThetaResolution(20);
sphereSource->SetPhiResolution(11);
sphereSource->Update();
polyData = sphereSource->GetOutput();
double cutValue = 0.1;
auto center = polyData->GetCenter();
vtkNew<vtkPlane> plane1;
plane1->SetOrigin(center[0]- cutValue, center[1], center[2]);
plane1->SetNormal(1.0, 0.0, 0.0);
vtkNew<vtkPlane> plane2;
plane2->SetOrigin(center[0] + cutValue, center[1], center[2]);
plane2->SetNormal(-1.0, 0.0, 0.0);
vtkNew<vtkPlane> plane3;
plane3->SetOrigin(center[0], center[1]- cutValue, center[2]);
plane3->SetNormal(0.0, 1.0, 0.0);
vtkNew<vtkPlane> plane4;
plane4->SetOrigin(center[0], center[1] + cutValue, center[2]);
plane4->SetNormal(0.0, -1.0, 0.0);
vtkNew<vtkPlaneCollection> planes;
planes->AddItem(plane1);
planes->AddItem(plane2);
planes->AddItem(plane3);
planes->AddItem(plane4);
vtkNew<vtkClipClosedSurface> clipper;
clipper->SetInputData(polyData);
clipper->SetClippingPlanes(planes);
//clipper->SetActivePlaneId(2);
//clipper->SetScalarModeToColors();
//clipper->SetClipColor(colors->GetColor3d("Banana").GetData());
//clipper->SetBaseColor(colors->GetColor3d("Tomato").GetData());
//clipper->SetActivePlaneColor(colors->GetColor3d("SandyBrown").GetData());
vtkNew<vtkDataSetMapper> clipMapper;
clipMapper->SetInputConnection(clipper->GetOutputPort());
vtkNew<vtkActor> clipActor;
clipActor->SetMapper(clipMapper);
clipActor->GetProperty()->SetColor(1.0000, 0.3882, 0.2784);
clipActor->GetProperty()->SetInterpolationToFlat();
vtkNew<vtkAxesActor> axes;
// Create graphics stuff
//
vtkNew<vtkRenderer> ren1;
ren1->SetBackground(colors->GetColor3d("SteelBlue").GetData());
vtkNew<vtkRenderWindow> renWin;
renWin->AddRenderer(ren1);
renWin->SetSize(512, 512);
renWin->SetWindowName("ClipClosedSurface");
vtkNew<vtkRenderWindowInteractor> iren;
iren->SetRenderWindow(renWin);
// Add the actors to the renderer, set the background and size
//
ren1->AddActor(clipActor);
ren1->AddActor(axes);
// Generate an interesting view
//
ren1->ResetCamera();
ren1->GetActiveCamera()->Azimuth(120);
ren1->GetActiveCamera()->Elevation(30);
ren1->GetActiveCamera()->Dolly(1.0);
ren1->ResetCameraClippingRange();
renWin->Render();
iren->Initialize();
iren->Start();
}
标签:center,0.0,VTK,裁剪,vtkPolyData,plane3,plane1,planes,vtkNew 来源: https://blog.csdn.net/yunzhaoqiang/article/details/122596454