3DOSMODE System Variable

GstarCAD 2026 → System Variables → 3D

Function Description:

The 3DOSMODE system variable is used to control 3D object snap settings.


Type	Integer
Saved in	Registry
Initial value	11
Range	0 ~ 256

System Variable Value:

1: all 3D object snaps are disabled. Shortcut key: ZNON
2: snap a vertex or a control point. Shortcut key: ZVER
**4:**snap a middle point on a face edge. Shortcut key: ZMID
**8:**snap the center point on a face. Shortcut key: ZCEN
16: snap a knot of a spline or surface. Shortcut key: ZKNO
32: snap a vertical face(planar faces only). Shortcut key: ZPER
64: snap an object nearest to a face. Shortcut key: ZNEA
128: snap the nearest point on planar segment of point cloud. Shortcut key: PNOD
256: all 3D object snaps are disabled. Shortcut key: PNEA

**Note：**this system variable can control which 3D object snap enabled. The setting is stored as a bitcode using the sum of listed system variable values.Users can specify more than one object snap by entering the sum of their values. Taking 6 for example, it means to specify the vertex and middle point object snaps.