Wiley 978-1-1180-1681-7 Datasheet download pdf (Page 34)

CHAPTER 1 The Basics of auTocaD civil 3D

Attach Multiple Entities

The Attach Multiple Entities command (found on the Home tab and extended Draw panel pull-

down) is a combination of the Line From End Of Object command and the Curve From End Of

Object command. This command is most useful for reconstructing deeds or road alignments

from legal descriptions when each entity is tangent to the previous entity. Using this command

saves you time because you don’t have to constantly switch between the Line From End Of

Object command and the Curve From End Of Object command (see Figure 1.45).

The Curve Calculator

Sometimes you may not have enough information to draw a curve properly. Although many of

the curve-creation tools assist you in calculating the curve parameters, you may ﬁnd an occa-

sion where the deed you’re working with is incomplete.

The Curve Calculator found in the Curves drop-down on the Draw panel helps you calculate

a full collection of curve parameters on the basis of your known values and constraints. The

units used in the Curve Calculator match the units assigned in your Drawing Settings.

The Curve Calculator can remain open on your screen while you’re working through com-

mands. You can send any value in the Calculator to the command line by clicking the button

next to that value (see Figure 1.46).

The button at the upper left of the Curve Calculator inherits the arc properties from an exist-

ing arc in the drawing, and the drop-down menu in the Degree Of Curve Deﬁnition selection

ﬁeld allows you to choose whether to calculate parameters for an arc or a chord deﬁnition.

The drop-down menu in the Fixed Property selection ﬁeld also gives you the choice of ﬁxing

your radius or delta value when calculating the values for an arc or a chord, respectively (see

Figure 1.47). The parameter chosen as the ﬁxed value is held constant as additional parameters

are calculated.

Figure 1.45

The Attach Mul-

tiple Entities

command draws a

series of lines and

arcs so that each

segment is tangent

to the previous one.

Figure 1.46

The Curve

Calculator

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Wiley 978-1-1180-1681-7 Datasheet Page 34