The corresponding options are found in the IGES section of the Preferences.
- Standard: This is the default option.
- The curves and surfaces are exported as is.
- Regarding surface boundaries, if the surface support is of B-Spline type and C2 continuous,
both representation of boundaries are defined (2D parametric and 3D
model space). Otherwise, only the 3D representation is
defined.
- B-Spline:
- Curves, circles and lines are
exported to B-Spline curves (126).
- Planes and surfaces are exported to rational
B-Spline surfaces (128).
- Regarding surface boundaries, 2D and 3D boundary representations are created. Those boundaries are
ordered and oriented.