6.0

Table Of Contents
534 | Chapter 19 Creating and Editing Surfaces
Key Terms
Te r m Definition
augmented line A 3D polyline with vector information at each vertex. An augmented line is a
surface creation tool that allows you to control the curvature and the tangency
of a surface.
base surface A basic underlying surface that carries a shape across a larger area. Can be
trimmed to precise shapes as needed, but the base surface remains intact and
may be displayed.
derived surface A surface that gets some or all of its attributes from one or more base surfaces.
motion-based surface A surface created by moving wires through space.
rail One or more curved lines along which a surface is swept. Rails form the
curvature of a swept surface.
skin surface The surface draped over a wireframe.
surface normal A short line perpendicular to a surface that shows where the surface starts and
which direction is out.
surface primitive Surface created by values you specify. It does not require a wireframe model.
U or V display lines Lines that correspond to rails and wires.
wire Generic term for lines, arcs, circles, ellipses, 2D and 3D polylines, augmented
lines, and splines.
wireframe modeling Wires and surface parts intermixed to construct the basic framework of a 3D
model. The initial step in creating a surfaced model.
wireframe surfacing Covering a wireframe model with surfaces.