本文整理汇总了C++中part::TopoShape::isNull方法的典型用法代码示例。如果您正苦于以下问题：C++ TopoShape::isNull方法的具体用法？C++ TopoShape::isNull怎么用？C++ TopoShape::isNull使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类part::TopoShape的用法示例。
在下文中一共展示了TopoShape::isNull方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: getCylinder
const bool Constraint::getCylinder(double &radius, double &height, Base::Vector3d& base, Base::Vector3d& axis) const
{
std::vector<App::DocumentObject*> Objects = References.getValues();
std::vector<std::string> SubElements = References.getSubValues();
if (Objects.empty())
return false;
App::DocumentObject* obj = Objects[0];
Part::Feature* feat = static_cast<Part::Feature*>(obj);
Part::TopoShape toposhape = feat->Shape.getShape();
if (toposhape.isNull())
return false;
TopoDS_Shape sh = toposhape.getSubShape(SubElements[0].c_str());
TopoDS_Face face = TopoDS::Face(sh);
BRepAdaptor_Surface surface(face);
gp_Cylinder cyl = surface.Cylinder();
gp_Pnt start = surface.Value(surface.FirstUParameter(), surface.FirstVParameter());
gp_Pnt end = surface.Value(surface.FirstUParameter(), surface.LastVParameter());
height = start.Distance(end);
radius = cyl.Radius();
gp_Pnt b = cyl.Location();
base = Base::Vector3d(b.X(), b.Y(), b.Z());
gp_Dir dir = cyl.Axis().Direction();
axis = Base::Vector3d(dir.X(), dir.Y(), dir.Z());
return true;
}