2004

304 | Chapter 16 Draw Geometric Objects
You can control the display of invisible edges with the SPLFRAME system
variable. If
SPLFRAME is set to a nonzero value, the invisible edges become
visible and can then be edited. If
SPLFRAME is set to 0, the invisible edges
remain invisible.
Create a Ruled Surface Mesh
With
RULESURF, you can create a surface mesh between two objects. You use
two different objects to define the edges of the ruled surface: lines, points,
arcs, circles, ellipses, elliptical arcs, 2D polylines, 3D polylines, or splines.
Pairs of objects to be used as the “rails” of a ruled surface mesh must both be
either open or closed. You can pair a point object with either an open or a
closed object.
You can specify any two points on closed curves to complete
RULESURF. For
open curves, AutoCAD starts construction of the ruled surface based on the
locations of the specified points on the curves.
invisible
edges
SPLFRAME = 1 SPLFRAME = 0
curves defined result
1
2
specified points on
corresponding sides
result