I create a TopoDS_Solid from a TopoDS_Shell.
The shell is valid & closed. After I get the
solid, I use BRepCheck_Analyzer() to check,
there is nothing wrong with it. Also I can show
it well on the viewer. But if I use BRepGProp::VolumeProperties() to check the volume value, I got a negative one. Could anyone tell me what's wrong?
The sequence of my coding is:
1. Creat a shell.
2. Check the shell face by face to make sure
all the faces are valid.
3. Sew the shell to avoid the gab(when creating
there is some small gabs maybe.)
4. Create the solid by BRepBuilderAPI_MakeSolid .
5. Check the volume of the solid.