Open CASCADE学习|扫掠

2024-02-12 04:18:01
开发
25

1、BRepPrimAPI_MakePrism

Draw Test Harness：

C++：

2、BRepPrimAPI_MakeRevol

Draw Test Harness：

C++：

3、BRepOffsetAPI_MakePipeShell

1、BRepPrimAPI_MakePrism

生成线性扫掠

Draw Test Harness：

polyline p  0 0 0 1 0 0 1 2 0 0 1 0 0 0 0prism r p 0 0 1vdisplay p r

C++：

#include <BRepBuilderAPI_MakePolygon.hxx>#include <BRepPrimAPI_MakePrism.hxx>#include"Viewer.h"int main(int argc, char* argv[]){
      BRepBuilderAPI_MakePolygon p;    p.Add(gp_Pnt(0,0, 0));    p.Add(gp_Pnt(1, 0, 0));    p.Add(gp_Pnt(1, 2, 0));    p.Add(gp_Pnt(0, 1, 0));    p.Add(gp_Pnt(0, 0, 0));    TopoDS_Shape r=BRepPrimAPI_MakePrism(p,gp_Vec(0,0,1));    Viewer vout(50, 50, 500, 500);    vout << r;    vout.StartMessageLoop();    return 0;}

2、BRepPrimAPI_MakeRevol

生成旋转扫掠

Draw Test Harness：

polyline p  0 0 0 1 0 0 1 2 0 0 1 0 0 0 0revol r p 3 0 0 0 1 0 280vdisplay p r

C++：

#include <BRepBuilderAPI_MakePolygon.hxx>
#include <BRepPrimAPI_MakeRevol.hxx>

#include"Viewer.h"

int main(int argc, char* argv[])
{
    BRepBuilderAPI_MakePolygon p;
    p.Add(gp_Pnt(0,0, 0));
    p.Add(gp_Pnt(1, 0, 0));
    p.Add(gp_Pnt(1, 2, 0));
    p.Add(gp_Pnt(0, 1, 0));
    p.Add(gp_Pnt(0, 0, 0));
    TopoDS_Shape r= BRepPrimAPI_MakeRevol(p, gp_Ax1(gp_Pnt(3,0,0), gp_Dir(0,1,0)),280*M_PI/180);
    Viewer vout(50, 50, 500, 500);
    vout << r;
    vout.StartMessageLoop();
    return 0;

}

3、BRepOffsetAPI_MakePipeShell

生成通用的扫掠。该类提供了一个框架，沿着脊柱的导线构建一个shell或者solid。构造solid，初始线框必须闭合的。

在Draw Test Harness中使用如下命令：

mksweep

addsweep

deletesweep

sestsweep

sestsweep有以下选项

-FR选项：切矢和法向由Frenet标架确定；

-CF选项：切矢由Frenet标架指定，法向通过计算最小扭转来确定；

-DT选项：切矢和法向由Darboux标架确定；

-CN选项：副法向由指定的dx, dy, dz确定；

-FT：切矢和法向是固定的；

buildsweep

buildsweep有指定不连续的处理方式及是否生成实体。其中

-C：将路径Path中不连续的地方通过延长和相交进行处理；

-R：将路径Path中不连续的地方通过相交和填充进行处理；

Draw Test Harness：

polyline p  0 0 0 1 0 0 1 2 0 0 1 0circle c 0 0 0 1 0 0 0.2mkedge e cwire w emksweep paddsweep wsetsweep -FX 1 0 0buildsweep r -Cvdisplay p w r

C++：

#include <BRepBuilderAPI_MakePolygon.hxx>
#include <Geom_Circle.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <BRepBuilderAPI_MakeWire.hxx>
#include <BRepOffsetAPI_MakePipeShell.hxx>
#include <TopoDS.hxx>

#include"Viewer.h"

int main(int argc, char* argv[])
{
    BRepBuilderAPI_MakePolygon p;
    p.Add(gp_Pnt(0,0, 0));
    p.Add(gp_Pnt(1, 0, 0));
    p.Add(gp_Pnt(1, 2, 0));
    p.Add(gp_Pnt(0, 1, 0));
    p.Add(gp_Pnt(0, 0, 0));
    Handle(Geom_Circle) c = new Geom_Circle(gp_Ax2(gp_Pnt(0, 0, 0), gp_Dir(1, 0, 0)), 0.2);
    TopoDS_Edge e = BRepBuilderAPI_MakeEdge(c);
    BRepBuilderAPI_MakeWire w;
    w.Add(e);
    BRepOffsetAPI_MakePipeShell* Sweep = new BRepOffsetAPI_MakePipeShell(TopoDS::Wire(p));
    gp_Dir D(1, 0, 0);
    gp_Ax2 Axe(gp_Pnt(0., 0., 0.), D);
    Sweep->SetMode(Axe);
    BRepBuilderAPI_TransitionMode Transition = BRepBuilderAPI_Transformed;
    Transition = BRepBuilderAPI_RightCorner;
    Sweep->SetTransitionMode(Transition);
    Sweep->Add(w, Standard_False, Standard_False);
    Sweep->Build();
    TopoDS_Shape r = Sweep->Shape();
    Viewer vout(50, 50, 500, 500);
    vout << p;
    vout << w;
    vout << r;
    vout.StartMessageLoop();
    return 0;

}

Draw Test Harness：

mksweep paddsweep wsetsweep -FRbuildsweep r -Cvdisplay p w r

C++：

#include <BRepBuilderAPI_MakePolygon.hxx>
#include <Geom_Circle.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <BRepBuilderAPI_MakeWire.hxx>
#include <BRepOffsetAPI_MakePipeShell.hxx>
#include <TopoDS.hxx>

#include"Viewer.h"

int main(int argc, char* argv[])
{
    BRepBuilderAPI_MakePolygon p;
    p.Add(gp_Pnt(0,0, 0));
    p.Add(gp_Pnt(1, 0, 0));
    p.Add(gp_Pnt(1, 2, 0));
    p.Add(gp_Pnt(0, 1, 0));
    p.Add(gp_Pnt(0, 0, 0));
    Handle(Geom_Circle) c = new Geom_Circle(gp_Ax2(gp_Pnt(0, 0, 0), gp_Dir(1, 0, 0)), 0.2);
    TopoDS_Edge e = BRepBuilderAPI_MakeEdge(c);
    BRepBuilderAPI_MakeWire w;
    w.Add(e);
    BRepOffsetAPI_MakePipeShell* Sweep = new BRepOffsetAPI_MakePipeShell(TopoDS::Wire(p));
    Sweep->SetMode(Standard_True);
    BRepBuilderAPI_TransitionMode Transition = BRepBuilderAPI_Transformed;
    Transition = BRepBuilderAPI_RightCorner;
    Sweep->SetTransitionMode(Transition);
    Sweep->Add(w, Standard_False, Standard_False);
    Sweep->Build();
    TopoDS_Shape r = Sweep->Shape();
    Viewer vout(50, 50, 500, 500);
    vout << p;
    vout << w;
    vout << r;
    vout.StartMessageLoop();
    return 0;

}

Draw Test Harness：

polyline p  0 0 0 1 0 0 1 2 0 0 1 0 0 0 0circle c 0 0 0 1 0 0 0.2mkedge e cwire w emksweep paddsweep wbuildsweep r -Rvdisplay p w r

C++：

#include <BRepBuilderAPI_MakePolygon.hxx>
#include <Geom_Circle.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <BRepBuilderAPI_MakeWire.hxx>
#include <BRepOffsetAPI_MakePipeShell.hxx>
#include <TopoDS.hxx>

#include"Viewer.h"

int main(int argc, char* argv[])
{
    BRepBuilderAPI_MakePolygon p;
    p.Add(gp_Pnt(0,0, 0));
    p.Add(gp_Pnt(1, 0, 0));
    p.Add(gp_Pnt(1, 2, 0));
    p.Add(gp_Pnt(0, 1, 0));
    p.Add(gp_Pnt(0, 0, 0));
    Handle(Geom_Circle) c = new Geom_Circle(gp_Ax2(gp_Pnt(0, 0, 0), gp_Dir(1, 0, 0)), 0.2);
    TopoDS_Edge e = BRepBuilderAPI_MakeEdge(c);
    BRepBuilderAPI_MakeWire w;
    w.Add(e);
    BRepOffsetAPI_MakePipeShell* Sweep = new BRepOffsetAPI_MakePipeShell(TopoDS::Wire(p));
    Sweep->Add(w, Standard_False, Standard_False);
    Sweep->SetMode(Standard_True);
    BRepBuilderAPI_TransitionMode Transition = BRepBuilderAPI_Transformed;
    Transition = BRepBuilderAPI_RoundCorner;
    Sweep->SetTransitionMode(Transition);
    Sweep->Build();
    TopoDS_Shape r = Sweep->Shape();
    Viewer vout(50, 50, 500, 500);
    vout << p;
    vout << w;
    vout << r;
    vout.StartMessageLoop();
    return 0;

}

锥度弯曲管

#include <Geom_BezierCurve.hxx>
#include <BRepOffsetAPI_MakePipeShell.hxx>
#include <Law_Linear.hxx>
#include <BRepAdaptor_Curve.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <Geom2d_TrimmedCurve.hxx>

#include <GCE2d_MakeSegment.hxx>

#include <GeomAPI_PointsToBSpline.hxx>
#include <BRepBuilderAPI_MakeFace.hxx>
#include <GC_MakeCircle.hxx>
#include <BRepBuilderAPI_MakeWire.hxx>
#include <BRepOffsetAPI_MakePipe.hxx>
#include <GC_MakeArcOfCircle.hxx>
#include <BRepAlgoAPI_Fuse.hxx>

#include <GCPnts_QuasiUniformDeflection.hxx>
#include <BRepBuilderAPI_MakeVertex.hxx>

#include"Viewer.h"

#include <GProp_GProps.hxx>
#include <BRepGProp.hxx>

int main(int argc, char* argv[])
{
    //Creation of points for the spine
    TColgp_Array1OfPnt array = TColgp_Array1OfPnt(1, 5);
    array.SetValue(1, gp_Pnt(1, 4, 0));
    array.SetValue(2, gp_Pnt(2, 2, 0));
    array.SetValue(3, gp_Pnt(3, 3, 0));
    array.SetValue(4, gp_Pnt(4, 3, 0));
    array.SetValue(5, gp_Pnt(5, 5, 0));

    //Creation of a Bezier Curve as the spine #创建贝塞尔曲线作为主干
    Geom_BezierCurve* bz_curv = new Geom_BezierCurve(array);
    TopoDS_Edge bz_curv_edge = BRepBuilderAPI_MakeEdge(bz_curv);
    TopoDS_Wire bz_curv_wire = BRepBuilderAPI_MakeWire(bz_curv_edge);

    //Creation of profile to sweep along the spine #创建沿脊柱扫描的轮廓
    gp_Circ circle = gp_Circ(gp::ZOX(), 1);
    circle.SetLocation(array[1]);
    TopoDS_Edge circle_edge = BRepBuilderAPI_MakeEdge(circle);
    TopoDS_Wire circle_wire = BRepBuilderAPI_MakeWire(circle_edge);
    
    //Creation of the law to dictate the evolution of the profile#规定轮廓的演变
    BRepOffsetAPI_MakePipeShell* brep1 = new BRepOffsetAPI_MakePipeShell(bz_curv_wire);
    Handle(Law_Linear) law_f =new Law_Linear();
    law_f->Set(0, 0.5, 1, 1);
    brep1->SetLaw(circle_wire, law_f, Standard_False,Standard_True);
    Viewer vout(50, 50, 500, 500);
    vout << bz_curv_wire;
    vout << brep1->Shape();
    vout.StartMessageLoop();
    return 0;

}

`参考文献：`

1、https://dev.opencascade.org/doc/occt-7.0.0/refman/html/class_b_rep_offset_a_p_i___make_pipe_shell.html#details

2、https://www.cnblogs.com/opencascade/p/OpenCASCADE_Sweep_Algorithm.html

3、https://blog.csdn.net/ydk001001/article/details/121210419

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