（05）vtk通过多边形构建矩形，并拉伸成立方体，两个立方体独立操作

前言

想在三维界面进行用户交互，实现对模型的独立操作，两个模型是自己建的模型。

方法

使用多边形构建矩形，并拉伸成立方体，两个立方体独立操作

int MyTrackballActor()
{ vtkSmartPointer<vtkLinearExtrusionFilter> m_extrude_sheyuan = vtkSmartPointer<vtkLinearExtrusionFilter>::New();{const int num_points = 4;vtkSmartPointer<vtkUnstructuredGrid> polygonGrid = vtkSmartPointer<vtkUnstructuredGrid>::New();vtkSmartPointer<vtkPoints> polygonPoints = vtkSmartPointer<vtkPoints>::New();vtkSmartPointer<vtkPolygon> polygon = vtkSmartPointer<vtkPolygon>::New();vtkSmartPointer<vtkDataSetMapper> polygonMapper = vtkSmartPointer<vtkDataSetMapper>::New();vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();double top_left[num_points][3] = {{ 0, 2280 - 3200, 0 },{ 0, 2280, 0 },{ -2300, 2280, 0 },{ -2300, 2280 - 3200, 0 }};double Hight = 2170.0;// 几何数据 + 拓扑数据polygonPoints->SetNumberOfPoints(num_points);polygon->GetPointIds()->SetNumberOfIds(num_points);for (int i = 0; i < num_points; ++i){polygonPoints->SetPoint(i, top_left[i]);polygon->GetPointIds()->SetId(i, i);}polygonGrid->InsertNextCell(polygon->GetCellType(), polygon->GetPointIds());polygonGrid->SetPoints(polygonPoints);vtkNew<vtkDataSetSurfaceFilter> surface_filter;surface_filter->SetInputData(polygonGrid);surface_filter->Update();vtkNew<vtkTriangleFilter> filter;filter->SetInputData(surface_filter->GetOutput());filter->Update();// Apply linear extrusion(对平面进行拉伸成3D)m_extrude_sheyuan->SetInputConnection(filter->GetOutputPort());m_extrude_sheyuan->SetExtrusionTypeToNormalExtrusion();m_extrude_sheyuan->SetVector(0, 0, 1);// 沿文字方向挤压,沿着z向上m_extrude_sheyuan->SetScaleFactor(Hight);// 设置挤压比例 //blog.csdn.net/wanyongtai/article/details/106490653m_extrude_sheyuan->Update();}vtkSmartPointer<vtkLinearExtrusionFilter> m_extrude_chuang = vtkSmartPointer<vtkLinearExtrusionFilter>::New();{//{const int num_points = 4;vtkSmartPointer<vtkUnstructuredGrid> polygonGrid = vtkSmartPointer<vtkUnstructuredGrid>::New();vtkSmartPointer<vtkPoints> polygonPoints = vtkSmartPointer<vtkPoints>::New();vtkSmartPointer<vtkPolygon> polygon = vtkSmartPointer<vtkPolygon>::New();vtkSmartPointer<vtkDataSetMapper> polygonMapper = vtkSmartPointer<vtkDataSetMapper>::New();vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();double chuangkuan_danbian = 800;//图纸显示为935mmdouble top_left[num_points][3] = {{ 100, -1 * chuangkuan_danbian, 0 },{ 2360, -1 * chuangkuan_danbian, 0 },{ 2360, chuangkuan_danbian, 0 },{ 100, chuangkuan_danbian, 0 },};double ChangHight = 851;// 几何数据 + 拓扑数据polygonPoints->SetNumberOfPoints(num_points);polygon->GetPointIds()->SetNumberOfIds(num_points);for (int i = 0; i < num_points; ++i){polygonPoints->SetPoint(i, top_left[i]);polygon->GetPointIds()->SetId(i, i);}polygonGrid->InsertNextCell(polygon->GetCellType(), polygon->GetPointIds());polygonGrid->SetPoints(polygonPoints);vtkNew<vtkDataSetSurfaceFilter> surface_filter;surface_filter->SetInputData(polygonGrid);surface_filter->Update();vtkNew<vtkTriangleFilter> filter;filter->SetInputData(surface_filter->GetOutput());filter->Update();// Apply linear extrusion(对平面进行拉伸成3D)m_extrude_chuang->SetInputConnection(filter->GetOutputPort());m_extrude_chuang->SetExtrusionTypeToNormalExtrusion();m_extrude_chuang->SetVector(0, 0, 1);// 沿文字方向挤压,沿着z向上m_extrude_chuang->SetScaleFactor(ChangHight);// 设置挤压比例 //blog.csdn.net/wanyongtai/article/details/106490653m_extrude_chuang->Update();}vtkSmartPointer<vtkDataSetMapper> polygonMappersheyuan = vtkSmartPointer<vtkDataSetMapper>::New();polygonMappersheyuan->SetInputConnection(m_extrude_sheyuan->GetOutputPort());vtkSmartPointer<vtkActor> coneActor = vtkSmartPointer<vtkActor>::New();coneActor->SetMapper(polygonMappersheyuan);vtkSmartPointer<vtkDataSetMapper> polygonMapper = vtkSmartPointer<vtkDataSetMapper>::New();polygonMapper->SetInputConnection(m_extrude_chuang->GetOutputPort());vtkSmartPointer<vtkActor> coneActor2 = vtkSmartPointer<vtkActor>::New();coneActor2->SetMapper(polygonMapper);vtkSmartPointer<vtkPoints> pointsInside = vtkSmartPointer<vtkPoints>::New();vtkSmartPointer<vtkPolyData> polyDataInside = vtkSmartPointer<vtkPolyData>::New();double point[3];vtkSmartPointer<vtkDelaunay3D> delaunay3D = vtkSmartPointer<vtkDelaunay3D>::New();delaunay3D->SetInputConnection(m_extrude_chuang->GetOutputPort());delaunay3D->Update();for (vtkIdType i = 0; i < m_extrude_chuang->GetOutput()->GetNumberOfPoints(); i++){m_extrude_chuang->GetOutput()->GetPoint(i, point);double pcoords[3];// The number of weights >= max number of nodes in each celldouble weights[4];int subId;vtkIdType cellId = delaunay3D->GetOutput()->FindCell(point, NULL, 0, .1, subId, pcoords, weights);if (cellId >= 0){std::cout << "In cell " << cellId << std::endl;std::cout << "inside" << std::endl;pointsInside->InsertNextPoint(point);}else{std::cout << "outside" << std::endl;}}polyDataInside->SetPoints(pointsInside);vtkSmartPointer<vtkVertexGlyphFilter> vertexGlyphFilter = vtkSmartPointer<vtkVertexGlyphFilter>::New();
#if VTK_MAJOR_VERSION <= 5vertexGlyphFilter->SetInputConnection(polyDataInside->GetProducerPort());
#elsevertexGlyphFilter->SetInputData(polyDataInside);
#endifvertexGlyphFilter->Update();// Mapper and actor for points insidevtkSmartPointer<vtkPolyDataMapper> pointsInsideMapper = vtkSmartPointer<vtkPolyDataMapper>::New();pointsInsideMapper->SetInputConnection(vertexGlyphFilter->GetOutputPort());vtkSmartPointer<vtkActor> pointsInsideActor = vtkSmartPointer<vtkActor>::New();pointsInsideActor->SetMapper(pointsInsideMapper);pointsInsideActor->GetProperty()->SetPointSize(6);pointsInsideActor->GetProperty()->SetColor(1, 0, 1);vtkRenderer *ren1 = vtkRenderer::New();ren1->SetBackground(0.1, 0.2, 0.4);// Finally we create the render window which will show up on the screen.// We put our renderer into the render window using AddRenderer. We also// set the size to be 300 pixels by 300.//vtkRenderWindow *renWin = vtkRenderWindow::New();renWin->AddRenderer(ren1);renWin->SetSize(900, 800);vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();iren->SetRenderWindow(renWin);vtkSmartPointer<StyleTrackballActor> style = vtkSmartPointer <StyleTrackballActor>::New();style->SetDefaultRenderer(ren1);style->ActorA = coneActor;style->ActorB = coneActor2;//vtkOBBTree * clipTree = vtkOBBTree::New();//vtkOBBTree * targetTree = vtkOBBTree::New();//targetTree->SetDataSet(targetPoly);//targetTree->BuildLocator(); //clipTree->SetDataSet(clipPoly);//clipTree->BuildLocator();使用包围盒求交 ，求交部分在OBBNodeIntersected中。NULL表示不做任何转换//clipTree->IntersectWithOBBTree(targetTree, NULL, OBBNodeIntersected, this);iren->SetInteractorStyle(style);ren1->AddActor(coneActor);ren1->AddActor(coneActor2);//ren1->AddActor(Actor1);//ren1->AddActor(Actor2);iren->Initialize();iren->Start();return 0;
} //blog.csdn.net/q610098308/article/details/108093627

效果

（05）vtk通过多边形构建矩形，并拉伸成立方体，两个立方体独立操作相关推荐

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（05）vtk通过多边形构建矩形，并拉伸成立方体，两个立方体独立操作

（05）vtk通过多边形构建矩形，并拉伸成立方体，两个立方体独立操作相关推荐

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