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VS+Qt+opencascade三维绘图stp/step/igs/stl格式图形读取显示
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这篇博客针对《VS+Qt+opencascade三维绘图stp/step/igs/stl格式图形读取显示》编写代码,代码整洁,规则,易读。 学习与应用推荐首选。
一、所需工具软件
二、使用步骤
1. 主要代码
2. 运行结果
三、在线协助
1. VS2019, Qt
2. C++
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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 array
cells->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);
}
}
//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);
Standard_Integer status = ReadIGES("cylinder.igs", aHSequenceOfShape);
cout << "return status:" << status << endl;
BuildScene(renderer, aHSequenceOfShape);
renderer->SetBackground(1, 1, 1);
// Render and interact
renderWindow->Render();
renderWindowInteractor->Start();
return 0;
}
1)远程安装运行环境,代码调试
2)Visual Studio, Qt, C++, Python编程语言入门指导
3)界面美化
4)软件制作
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