2.0

Daylighting
73
Adding Vertices to a Polyline for Daylighting
You can add vertices to the polyline footprint for calculating a more accurate
daylight line. The daylight match line is generated by calculating the match
point from each vertex on the polyline. Each daylight line bisects the angle
formed by the segments before and after the vertex. If the vertices are closer
together a more accurate daylight line can be generated. Vertices are added by
specifying the horizontal distance between the vertices around the polyline.
The polyline can have a constant elevation, or it can have varying elevations at
its vertices. It can be an opened or closed polyline.
To add vertices to an existing polyline
1 From the Grading menu, choose Daylighting ä Add Vertices.
The following prompt is displayed:
Select entity (or Points):
2 At this prompt, select the polyline to which to add vertices using one of the
following methods:
n
Select a polyline with your pointing device.
n
Type P and select points to define the polyline.
NOTE
When you select the points to define the polyline, the following prompt is
displayed:
Establish first point elevation}
Elevation <0.00>:
Establish second point elevation}
Elevation (eXit/Difference/Slope) <0.000>:
3 At this prompt, do one of the following:
n
Type the elevation for the second point.
n
Type D and the difference in elevation between the first and second points.
n
Type S and a slope between the first and second points, or type G and
a grade.
4 Specify the distance to set the additional polyline vertices.This is the horizontal
distance between the new vertices.
If you selected a 2D polyline that contains arcs, the following prompt
is displayed:
Additional curve vertices by (Number/Mid/Distance) <Distance>:
5 At the prompt, do one of the following:
n
Type N, and then the number of vertices to add.
n
Type M, and then the mid-ordinate distance.
n
Type D, and then the distance between each vertex.
The following prompt is displayed:
Erase old object (Yes/No) <Yes>:
6 At this prompt, press ENTER to erase the old polyline. You can also type No to
keep the old polyline.