iPOGO V5 Users Group - Help Manual

*Methodology*
Command:	4.1
Alpha Alias:	Arc DirOs
Description:	Computes the point of intersection of a curve with a line or bearing parallel to and offset from a known line
Data Format:	4.1 Set From Bearing Offset RadiusPoint Near Radius {[From Bearing Offset] ...} ;
Problem:	Given points 100 and 215. Set point 31 as shown.
Solution:	4.1 31 215 100 215 -12.5 100 215 150 215 100 215 12.5 ;

Data Description

Command	4.1	Defines a line or bearing parallel to a known line at a specified offset distance and computes a point at the intersection of a curve with the offset line. The defined line or bearing may intersect the curve at two points. You must indicate your required point of intersection by specifying a point number that is located nearest to the solution to be retained. Note: If you use the repeating feature of this command to compute the points of intersection of the arc with more than one line, be sure to enter a Near point that will define all the required solutions.
Set	31	Point number of the initial point to be computed.
From	215	Point number of a previously computed or stored point which defines the line on which the computed point is to be set.
Bearing	100, 215	Direction of the line on which the required point is to be computed. Bearings may be entered using quadrant definition and angle or point definition.
Offset	-12.5	Distance between the known line and the parallel line or bearing on which the points being computed will be set.
RadiusPoint	100	Point number of the previously computed radius point of the curve.
Near	215	Point number that is located nearer to the required solution than to the alternate solution.
Radius	150	Radius length of the curve.
{[From Bearing Offset] ...}	215 100, 215 12.5	Repeating feature of this command which allows you to set additional points on the same curve. Define the additional parallel lines which will intersect with the same curve by entering a point number for From and the bearing and offset values for each additional line. Additional computed points of intersection will be numbered automatically from the Set point number.
End Command	;	All commands end with a semi-colon.

Example Command File

$ Example data set for 4.1 (Arc DirOs) command.

$ Set initial points.
  0 
    1 1080.0 1450.0
    2 1124.4 1651.8
    3 1078.4 2023.5
  100  826.4 1740.8 ;
  1 215 100 -4 10 0 0 150 ;
  3.1 20 1 1 2 18 
         2 2 3 15 
       215 100 215 -12.5 
       215 -9 0 
       215 -9 12.5  ;
  1 1000 20 2 1 200 ;
  1 1001 20 2 3 400 ;
  1.2 1002 22 1001 3 ;
  1.2 1004 20 1000 2 ;
  2 1005 100 100 215 -15 0 0 150 ;
  2 1006 100 100 215  35 0 0 150 ;
  1 1007 1005 -3 65 0 0 150 ;
  1 1008 1006 -2 65 0 0 200 ;
 -3 1011 1006 1006 1008 1003 ;
 -3 1012 1005 1005 1007 1004 ;
  4 1013 1002 1002 100 100 1006 150 ;

$ Set points using the 4.1 command.
  4.1 31 215 100 215 -12.5 
         100 215 150
         215 100 215 12.5 ;


$ Setup plotting parameters with 
$   feature, layer, color, style, thickness
  15.1 L1 LINES1 7 1 1;
  15.1 L2 LINES2 1 1 1;

$ Turn plot on
  91 ;

$ Activate the current feature
  15 L1 ;
         $ Draw the lines.
           7 1 1 2 3 ;
           7 1 1000 20 1001 ;
           6 1 100 1005 100 1006 ;
           7 1 1007 1005 100.1 1006 1008 ;

$ Activate new feature
  15 L2 ;
         $ Draw additional lines.
           7 1 1002 1013 ;
           7 1 1003 1011 ;
           7 1 1004 1012 ;
           7 1 21 31 ;
           7 1 23 32 ;
           7 1 22 215 ;

Help for this command was last updated: 06/27/2000 11:32:08 PM

iPOGO V5 Help Manual On-Line

Group:Command:

4) Brg-Dist Intx4.1 or Arc DirOs

Group:
Command:

4) Brg-Dist Intx
4.1 or Arc DirOs