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我正尝试在OpenCASCADE中更改现有TopoDS_Shape的几何图形。一种可能的应用是修改身体的边缘而不需要重建整个身体(例如,改变圆柱体的一个帽的半径,移动Bspline曲线/表面中的控制点)。如何在OpenCASCADE中更改TopoDS_Shape的底层几何图形
- 在OpenCASCADE中有这样的标准方法吗?
- 是否可以在不创建新形状的情况下更新几何图形?
我已经尝试使用BRepAdaptor_HCurve
代替,但这并没有真正的帮助。
Handle(Geom_Circle) aCircle = new Geom_Circle(gp_Ax2(gp_Pnt(0, 0, 0), gp_Dir(0, 0, 1)), 5); // create a circle in the xy plane, origin (0,0,0) radius 5;
TopoDS_Edge circ = BRepBuilderAPI_MakeEdge(aCircle); // switch to topological description;
STEPControl_Writer writer;
writer.Transfer(circ,STEPControl_AsIs); // access topology for output
BRepAdaptor_Curve theAdaptor = BRepAdaptor_Curve(circ); // create an adaptor
gp_Circ mod_circ = theAdaptor.Circle();
mod_circ.SetRadius(1); // change radius to 1
// I dont want to create a new circle, but reuse the old one with the updated geometry:
// writer.Transfer(circ, STEPControl_AsIs); // access topology for output
// in order to output the updated geometry, we also have to create a new edge
TopoDS_Edge another_circ = BRepBuilderAPI_MakeEdge(mod_circ);
writer.Transfer(another_circ, STEPControl_AsIs); // access topology for output
writer.Write("debug.stp");
原始和改进的几何形状,通过写circ
和another_circ