3D Polyline
Function
A 3D polyline is a line of connected
points that have various elevations, and the slope between points
is constant. It can be used in defining pads, excavations, drainage
ditched and slopes from proposed design features to meet existing site
conditions. This command lets you
digitize a 3D polyline by picking points along the lines on the
drawing. It prompts you first the Polyline
3D Options Dialog for
entering the layer name. Elevation
Adder allows you to truncate the elevations you have to enter in
by add a given amount to them. There are five ways to
enter elevations: known elevation of the point, interpolate, slope from
previous
point, ratio from previous point and degree from previous point. You
can choose one of the methods between picking points. Auto-Zoom mode would
automatically zoom the display to center around the last point when you
get near the edge of the screen while picking points. While digitizing
a polyline, press A to interpolate the elevation or B to enter it in.
The command
keeps prompting you to pick the next point until your press Enter to
finish digitizing, or press A
on the puck or enter Close on
the keyboard to close the polyline on itself. You can also use
AutoCAD's OSNAP command to pick points by pressing the decimal [.]
button on the digitizer puck. If you make a mistake, press B
on the puck or enter
Undo on the keyboard to remove the mistake and then continue to
digitize. After finishing a polyline, the command prompts your to
digitize another polyline until you press
B or enter No.
Prompts
First point:
Interpolate[A]/screen
Pick/<Elevation[B]> <0.00>: 256
Z: 256.00
Close[A]/Undo[B]/Osnap[.]/Pick next
point (Enter to end): Pick
point
Slope/Ratio/Interpolate[A]/Degree/screen
Pick/<Elevation[B]>
<256.00>: A
Slope/Ratio/Elevation[B]/Degree/screen
Pick/Osnap[.]/Next point or
elevation<Interpolate>: Pick
point
This point elevation will be
interpolated upon completion.
Slope/Ratio/Elevation[B]/Degree/screen
Pick/Osnap[.]/Next point or
elevation<Interpolate>: 279
Z: 279.00, Hz dist: 30.01, Slope dist:
37.81, Slope: 76.6% Ratio: 1.3:1
Close[A]/Undo[B]/Osnap[.]/Pick next
point (Enter to end): Pick
point
Slope/Ratio/Elevation[B]/Degree/screen
Pick/Osnap[.]/Next point or
elevation<Interpolate>: Press
Enter
Z: 279.00, Hz dist: 24.18, Slope dist:
24.18, Slope: 0.0% Ratio: 0.0:1
Close[A]/Undo[B]/Osnap[.]/Pick next
point (Enter to end): A
Digitize Another EXIST_PLINE Polyline
[Yes(A)/<No(B)>]? B
<Tablet Off>
Prerequisite: Have a
digitizer board and a puck connected to your computer, and have Wintab
driver installed. The digitizer has been correctly set up. Have done
tablet calibration for
current drawing.
Keyboard Command: dig_3dp