Editing Solids and Surfaces - Autodesk AutoCAD 2013 Practical 3D Drafting and Design - page 235

The command has the following option:
• PROjection direction : This option only allows us to specify the projection
direction before selecting the objects to project.
Note
The SURFACEAUTOTRIM variable specifies whether the object is trimmed (value
1 ) or not (value 0 ), when applying this command and it must be set before.
This variable is saved in the registry. The ribbon, Surface | Project Geometry ,
provides direct access to these variable and command options.
The IMPRINT command
The IMPRINT command (no alias) allows you to create edges from intersections of
solids and surfaces with linear entities, regions, or solids. This command is equival-
ent to the SOLIDEDIT Imprint option, the only difference being that IMPRINT can
also be applied to surfaces.
Exercise 7.6
We are going to create a plastic part, with the application of the last seen commands.
1. Open the drawing A3D_07_06.DWG . This drawing is only composed by
2D polylines.
2. Start by orbiting the model and moving the inner polylines 30 units along
the Z direction.
3. Apply the EXTRUDE command to the outer polyline, height of extrusion, 5 .