The AcadSchemes command creates AutoCAD export schemes, which determine how various Rhino objects are exported to AutoCAD .dwg and .dxf files.
These options can be saved as schemes for later use. Several schemes that have been determined to give good results are available on the Export Scheme list. You may have to experiment with the options to get the best result from your downstream application.
AutoCAD Export Schemes
Select the export scheme to edit.
When exporting curves to R12 DWG/DXF, curves are approximated with polylines. When exporting to R13/R14/2000+ DWG/DXF, you can export either polyline or spline entities.
AutoCAD Release 12 DXF only.
Simple solids export to AutoCAD as 3DSolids (SAT).
The wireframe is exported as curves. Use settings on the Curves tab to specify how these and other curves are exported.
Surfaces are exported as polyface meshes.
Use the Create Mesh from NURBS object dialog box to adjust the mesh settings.
Export meshes without modification.
Each face in a polygon mesh is exported as a separate 3DFace.
Some programs that read DXF files may read 3DFaces, but may not properly read polyface meshes.
Project objects to the active construction plane or the active view plane. Objects will appear on the world xy plane in the DWG/DXF file. Projecting does not automatically include silhouette lines.
For silhouette lines, see the Silhouette and Make2D commands.
Objects are not projected.
Project to the active construction plane.
Project to the active view plane.
Exports colors as red, green, blue (RGB) values.
Converts RGB colors to ACI (AutoCAD Color Index) colors. White and black in Rhino are both exported as ACI 7.
ACI 7 is a special color in AutoCAD. It displays as black when the viewport background is light, and as white when the viewport background is dark. Rhino does not have such feature.
AutoCAD Color Index is a 255-color palette. Conversion between RGB and ACI only works for the 255 colors. All the rest colors can only be approximations.
Keeps arc normals in their current orientation.
Flips arc normals to be mostly in the + direction of the closest world xyz coordinate.
Whether or not the arc normal is exactly parallel to an x,y or z axis, we want to find the axis to which it is closest to parallel and, if necessary, reverse the arc normal so that it is more parallel to that axis.
Exports 2-D polylines as LWPolylines (lightweight polylines). 3-D polylines are always exported as Polyline entities.
All curves are approximated with polylines before exporting. You can adjust the way polylines are created in the Curve tessellation parameters.
Each point on the polyline can have a different z value.
If polycurves with arc segments are saved as Polylines and Simplify lines and arcs is checked, they are saved as bulge segments in the polyline. Otherwise, they are tessellated to small straight polyline segments.
When exporting curves as polylines, Rhino must approximate each curve with a polyline. The Maximum angle setting, combined with the Chord height and Segment length settings, determine how the polylines are created.
The Maximum angle option sets the maximum angle between adjacent polyline segments. The larger this number, the farther away the polyline segment midpoints are from the original curve.
The distance from the polyline segment midpoint to the curve will be less or equal to this number. Smaller numbers make the polyline fit the curve better, but they also increase the number of polyline segments.
The maximum length of a polyline segment. This setting uses current model units and ensures that all polyline segments are shorter than this setting.
The physical size of the model should be taken into consideration when using this setting exporting a boat that is 100,000 units long with a maximum segment length of 0.01 will result in millions of polyline segments and a huge DWG/DXF file.
Splits polycurves into separate splines at polycurve segment start/end points.
Splits curves into separate splines at kinks.
Creates a new scheme.
See: Naming conventions in Rhino
Saves the currently selected scheme.
Saves the currently selected scheme with a new name.
Deletes the currently selected scheme.
Renames the currently selected scheme.
Exports the settings to a scheme file.
Imports the settings from a scheme file.
Closes the AutoCAD Export Schemes dialog box.
AutoCAD (.dwg; .dxf; .dwf) Import/Export
Export DWG/DXF with an external scheme file
Rhinoceros 7 © 2010-2023 Robert McNeel & Associates. 03-May-2023