Datasheet

creaTing curves
|
27
Pressing ↵ at this prompt lets you input your desired radius. As with standard AutoCAD
commands, pressing T changes the input parameter to Tangent, pressing C changes the input
parameter to Chord, and so on.
As with the Fillet command, your inputs must be geometrically possible. For example, your
two lines must allow for a curve of your specifications to be drawn while remaining tangent
to both. Figure 1.31 shows two lines with a 25″ radius curve drawn between them. Note that
the tangents have been trimmed so their endpoints coincide with the endpoints of the curve. If
either line had been too short to meet the endpoint of the curve, then that line would have been
extended.
cr e a t e cu r v e on tw o li n e s co m m a n d
The Create Curve On Two Lines command is identical to the Create Curve Between Two Lines
command, except that the Create Curve On Two Lines command leaves the chosen tangents
intact. The lines aren’t trimmed or extended to the resulting PC and PT of the curve.
Figure 1.32, for example, shows two lines with a 25″ radius curve drawn on them. The tan-
gents haven’t been trimmed and instead remain exactly as they were drawn before the Create
Curve On Two Lines command was executed.
cr e a t e cu r v e th r o u g h Po i n t co m m a n d
The Create Curve Through Point command lets you choose two tangents for your curve fol-
lowed by a pass-through point. This tool is most useful when you don’t know the radius, length,
or other curve parameters but you have two tangents and a target location. It isn’t necessary that
the pass-through location be a true point object; it can be any location of your choosing.
This command also trims or extends the original tangents so their endpoints coincide with
the curve endpoints. The lines are trimmed or extended to the resulting PC and PT of the curve.
Figure 1.33, for example, shows two lines and a desired pass-through point. Using the Create
Curve Through Point command allows you to draw a curve that is tangent to both lines and that
passes through the desired point. In this case, the tangents have been trimmed to the PC and PT
of the curve.
Figure 1.31
Two lines using
the Create Curve
Between Two Lines
command
Figure 1.32
The original lines
stay the same
after you execute
the Create Curve
On Two Lines
command.
016817c01.indd 27 5/24/11 10:17:44 AM