GstarCAD 2021 new 3D functionality: CONVTONURBS
CONVTONURBS is used to convert 3D solids and surfaces into NURBS surfaces.
How to access CONVTONURBS Command
- When using 2D Drafting workspace,
Surface > Convert to NURBS, as shown in the following picture,

2. When using GstarCAD Classic workspace,
Modify > Surface Editing > Convert to NURBS, as shown in the following picture,

3. We can enter “CONVTONURBS”, then press Enter key to execute,

CONVTONURBS is easy to use !
After executing the command, we are prompted to select objects to convert, as shown in the following picture,

See Before and After the CONVTONURBS of a 3D solid box and a cone, as shown in the following picture,


To convert a mesh to nurbs, we’ll need to convert it to solid or surface using CONVTOSOLID or CONVTOSURFACE, we can then use CONVTONURBS to convert.
Small tips
GstarCAD 2021 has also added a series of NURBS functionality including:
CVSHOW

CVHIDE

CVADD

CVREMOVE

Leave a Reply