VTK进行IGES文件的读取及显示

**使用的VTK版本是8.2，但是网上使用的VTK版本很老，直接复制会出现无法解析外部符号等的错误，我们只需要更新以下代码里的部分内容即可，
其中需要注意的是：
下面的三行代码，需要根据自己lib目录下的文件名进行重新命名，例如我的是：

我只要在这里的模块初始化时，
将 vtkRenderingOpenGL—>vtkRenderingOpenGL2 ，即可，剩下的两项类似。

VTK_MODULE_INIT(vtkRenderingOpenGL2);
VTK_MODULE_INIT(vtkRenderingFreeType);
VTK_MODULE_INIT(vtkInteractionStyle);

具体的代码如下：**

//#define WNT
#include <gp_Circ.hxx>
#include <gp_Elips.hxx>
#include <gp_Sphere.hxx>#include <Poly_Polygon3D.hxx>
#include <Poly_Triangulation.hxx>#include <TopTools_ListIteratorOfListOfShape.hxx>
#include <TopTools_HSequenceOfShape.hxx>#include <BRepBuilderAPI_MakeVertex.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>#include <IGESControl_Controller.hxx>
#include <IGESControl_Writer.hxx>
#include <IGESControl_Reader.hxx>#include <TopoDS_Edge.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS.hxx>#include <BRep_Tool.hxx>
#include <BRepMesh.hxx>
#include <BRepMesh_IncrementalMesh.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <BRepBuilderAPI_MakeFace.hxx>#include <BRepAdaptor_Curve.hxx>
#include <GCPnts_TangentialDeflection.hxx>
#include <TopExp_Explorer.hxx>
#include <Standard_TypeDef.hxx>#include <vtkRenderer.h>
#include <vtkSmartPointer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>//vtk lib
#include <vtkSmartPointer.h>
#include <vtkPoints.h>
#include <vtkPolyData.h>
#include <vtkCellArray.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
//这里添加一个头文件
#include <vtkAutoInit.h>#include <vtkRenderWindow.h>
#include <vtkRenderer.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkProperty.h>
#include <vtkTriangle.h>Standard_Integer ReadIGES(const Standard_CString& aFileName,Handle(TopTools_HSequenceOfShape)& aHSequenceOfShape)
{IGESControl_Reader Reader;Standard_Integer status = Reader.ReadFile(aFileName);if (status != IFSelect_RetDone){return status;}Reader.TransferRoots();TopoDS_Shape aShape = Reader.OneShape();aHSequenceOfShape->Append(aShape);return status;
}void BuildMesh(vtkRenderer* render, const TopoDS_Face& face, double deflection = 0.1)
{TopLoc_Location location;//BRepMesh::Mesh(face, deflection);该函数已经弃用BRepMesh_IncrementalMesh(face, deflection);Handle_Poly_Triangulation triFace = BRep_Tool::Triangulation(face, location);Standard_Integer nTriangles = triFace->NbTriangles();gp_Pnt vertex1;gp_Pnt vertex2;gp_Pnt vertex3;Standard_Integer nVertexIndex1 = 0;Standard_Integer nVertexIndex2 = 0;Standard_Integer nVertexIndex3 = 0;TColgp_Array1OfPnt nodes(1, triFace->NbNodes());Poly_Array1OfTriangle triangles(1, triFace->NbTriangles());nodes = triFace->Nodes();triangles = triFace->Triangles();vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();vtkSmartPointer<vtkCellArray> cells = vtkSmartPointer<vtkCellArray>::New();vtkSmartPointer<vtkPolyData> polyData = vtkSmartPointer<vtkPolyData>::New();points->Allocate(nTriangles * 3);cells->Allocate(nTriangles);int id = 0;for (Standard_Integer i = 1; i <= nTriangles; i++){Poly_Triangle aTriangle = triangles.Value(i);aTriangle.Get(nVertexIndex1, nVertexIndex2, nVertexIndex3);vertex1 = nodes.Value(nVertexIndex1).Transformed(location.Transformation());vertex2 = nodes.Value(nVertexIndex2).Transformed(location.Transformation());vertex3 = nodes.Value(nVertexIndex3).Transformed(location.Transformation());points->InsertNextPoint(vertex1.X(), vertex1.Y(), vertex1.Z());points->InsertNextPoint(vertex2.X(), vertex2.Y(), vertex2.Z());points->InsertNextPoint(vertex3.X(), vertex3.Y(), vertex3.Z());vtkSmartPointer<vtkTriangle> triangle = vtkSmartPointer<vtkTriangle>::New();triangle->GetPointIds()->SetId(0, id * 3);triangle->GetPointIds()->SetId(1, id * 3 + 1);triangle->GetPointIds()->SetId(2, id * 3 + 2);// Add the triangle to a cell arraycells->InsertNextCell(triangle);id++;}polyData->SetPoints(points);polyData->SetPolys(cells);vtkSmartPointer<vtkPolyDataMapper> sourceMapper = vtkSmartPointer<vtkPolyDataMapper>::New();//setInput函数已经弃用，使用SetInputData()sourceMapper->SetInputData(polyData);vtkSmartPointer<vtkActor> sourceActor = vtkSmartPointer<vtkActor>::New();sourceActor->SetMapper(sourceMapper);sourceActor->GetProperty()->SetColor(1, 0, 0);render->AddActor(sourceActor);}void BuildScene(vtkRenderer *renderer, Handle(TopTools_HSequenceOfShape)& aHSequenceOfShape)
{Standard_Integer index = aHSequenceOfShape->Length();TopoDS_Shape theCompSolid = aHSequenceOfShape->ChangeValue(index);for (TopExp_Explorer faceExp(theCompSolid, TopAbs_FACE); faceExp.More(); faceExp.Next()){// The 3d-mesh of the FACE is assembled to form the// boundary of the SOLID.const TopoDS_Face& theFace = TopoDS::Face(faceExp.Current());BuildMesh(renderer, theFace);}}//这里添加三行代码
VTK_MODULE_INIT(vtkRenderingOpenGL2);
VTK_MODULE_INIT(vtkRenderingFreeType);
VTK_MODULE_INIT(vtkInteractionStyle);int main(void){vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();vtkSmartPointer<vtkRenderWindow> renderWindow = vtkSmartPointer<vtkRenderWindow>::New();renderWindow->AddRenderer(renderer);vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = vtkSmartPointer<vtkRenderWindowInteractor>::New();renderWindowInteractor->SetRenderWindow(renderWindow);Handle(TopTools_HSequenceOfShape) aHSequenceOfShape = new TopTools_HSequenceOfShape();Standard_Integer status = ReadIGES("F:\\Researching\\ZhangGui\\test resource\\zhizuo_1.igs", aHSequenceOfShape);cout << "return status:" << status << endl;BuildScene(renderer, aHSequenceOfShape);renderer->SetBackground(1, 1, 1);// Render and interactrenderWindow->Render();renderWindowInteractor->Start();return 0;}

将VTK的lib、头文件添加到当前项目即可（include，lib文件夹，还要在附加依赖项中添加VTK的lib的名字），最后将IGES的文件路径改为你的文件路径即可。

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VTK进行IGES文件的读取及显示

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