2013

Table Of Contents
Projecting Geometry onto Surfaces, Solids, and Regions
Similar to projecting a movie onto a screen, you can project geometry onto
3D solids, surfaces, and regions from different directions to create trimming
edges. The PROJECTGEOMETRY command creates a duplicate curve on the
object that you can move and edit. You can also trim against 2D curves that
do not actually touch the surface, but that appear to intersect the object in
the current view.
Use the SURFACEAUTOTRIM system variable to automatically trim a surface
when you project geometry onto it.
Options for Projecting Geometry
Project geometry from 3 different angles: the Z axis of the current UCS, the
current view, or a path between two points.
Project to UCS - Projects the geometry along the positive or negative Z
axis of the current UCS.
Project to View - Projects the geometry based on the current view.
Project to Two Points - Projects the geometry along a path between
two points.
Extend a Surface
Create a new surface by extending it to meet the edge of another object or by
specifying an extension length.
There are two types of extend surfaces: merge and append. The merge surface
is a continuation of the surface with no seam. The append surface extends the
surface by adding a second surface with a seam. Because it creates a seam,
append surfaces have
continuity and bulge magnitude (page 372) properties.
For both surface types, use the Properties Inspector to change the length or
to derive the length from a mathematical expression.
Modify 3D Models | 447