FileStpWriteOptions

Write straight edges as STEP line entities and let circular edges reference their circle directly, instead of writing degree 1 splines and trimmed curve wrappers. Some importers, sheet metal and CAM software in particular, require these analytic curves.

Some (not most, and not Rhino) importing applications can make use of the 2-D trimming curves to get a more accurate and faster import. The size of the step file will be larger

Let importing application set color for black objects. If a Rhino object has color black, no color is assigned to the object in the step file.This will cause the importing application to give the object its default color.This is desirable because black objects look like ink blots in some applications.This option is grayed out if the schema option is AP203ControConfigDesign since that schema does not include color entities.

Get and set the schema of the step file being written.

Splits closed surfaces, for example, the interior surfaces of drilled holes.

Create a dictionary of these options. This dictionary can be passed to the RhinoDoc.Export function