Open CASCADE基础介绍(6)

BRepPrimAPI_MakeWedge类生成一个楔块或楔块的一部分；

BRepPrimAPI_MakePrism类生成一个线性的swept,称为Prisms;它的基类

是BRepPrimAPI_MakeSweep类；BRepPrimAPI_MakeSweep类的基类是 BRepBuilderAPI_MakeShape类

注意，原始基本图形不可以包含任何实体： 应用此类时：

--顶点“推移”成边：

TopoDS_Vertex V1 = BRepBuilderAPI_MakeVertex(gp_Pnt(-200.,-200.,0.));

Handle(AIS_Shape) ais1 = new AIS_Shape(V1);

TopoDS_Shape S1 = BRepPrimAPI_MakePrism(V1,gp_Vec(0.,0.,100.));

Handle(AIS_Shape) ais2 = new AIS_Shape(S1); --边“推移”成面：.

TopoDS_Edge E = BRepBuilderAPI_MakeEdge(gp_Pnt(-150.,-150,0.), gp_Pnt(-50.,-50,0.));

Handle(AIS_Shape) ais3 = new AIS_Shape(E);

myAISContext->Display(ais3,Standard_False);

TopoDS_Shape S2 = BRepPrimAPI_MakePrism(E,gp_Vec(0.,0.,100.)); --Wires “推移”成Shells.

TopoDS_Edge E1 = BRepBuilderAPI_MakeEdge(gp_Pnt(0.,0.,0.), gp_Pnt(50.,0.,0.));

TopoDS_Edge E2 = BRepBuilderAPI_MakeEdge(gp_Pnt(50.,0.,0.), gp_Pnt(50.,50.,0.));

TopoDS_Edge E3 = BRepBuilderAPI_MakeEdge(gp_Pnt(50.,50.,0.), gp_Pnt(0.,0.,0.));

TopoDS_Wire W = BRepBuilderAPI_MakeWire(E1,E2,E3);

TopoDS_Shape S3 = BRepPrimAPI_MakePrism(W,gp_Vec(0.,0.,100.)); --Faces “推移”成Solids.

TopoDS_Face F = BRepBuilderAPI_MakeFace(gp_Pln(gp::XOY()),Wc);

Handle(AIS_Shape) ais7 = new AIS_Shape(F);

myAISContext->Display(ais7,Standard_False);

TopoDS_Shape S4 = BRepPrimAPI_MakePrism(F,gp_Vec(0.,0.,100.)); --Shells “推移”成复合实体

BRepPrimAPI_MakeRevol类

一个回转sweep体；

类继承关系和前面类似：BRepBuilderAPI_MakeShape--BRepPrimAPI_MakeSweep-->BRepPrimAPI_MakeRevol

，对于角度而言，范围是[0，2PI]，默认值是2PI，生成规则： - Vertex -> Edge. - Edge -> Face. - Wire -> Shell. - Face-> Solid.

- Shell-> CompSolid.

〉

BRepOffsetAPI_MakePipe类可以生成一个管道

类继承关系是：BRepBuilderAPI_MakeShape--BRepPrimAPI_MakeSweep-->BRepOffsetAPI_MakePipe

以下为生成一个管道的示例过程：