Graphics Programs Reference
In-Depth Information
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4.
In the Target Mapping dialog box, under Width Or Offset Targets, click
<None> in the Object Name column next to the Left Lane subassembly.
This opens the Set
Width Or Offset Target
dialog box.
5.
In the Set Width Or Offset Target dialog box, under Select Object
Type To Target, select Feature Lines, Survey Figures, and Polylines.
6.
Click Select From Drawing. Then, in the left viewport, zoom in to the
beginning of Jordan Court where it intersects with Emerson Road.
7.
Click the red polyline that represents the desired path of the left
lane's edge, and then press Enter.
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8.
Click OK twice to return to the drawing. The corridor is widened near
the entrance, as shown in Figure 9.15. By widening the left lane this
way, you make extra room for a turning lane.
It may seem that the red
polyline is on the right
side of the road, but
remember that left and
right are defined while
looking in the direction
in which the stations
increase.
FiGuRE 9.15
The corridor is wider where the lane-
edge polyline was targeted.
9.
Click within the corridor to reopen the Target Mapping dialog box.
10.
In the Target Mapping dialog box, click the cell next to Surfaces that
reads <Click Here To Set All>.
11.
Select EG, and click OK. Then click OK to dismiss the Target
Mapping dialog box. Pan around in the lower-right viewport to
view the 3D representation of the corridor.
You should now see additional geometry along the edges of the
corridor (see Figure 9.16). This represents the daylighting that has
been applied. The daylighting geometry is noticeably wider in some
areas than in others. These are areas that are below existing ground
through which a ditch has been constructed. This automatic creation
of ditches is a function of the BasicSideSlopeCutDitch subassembly.
