iPOGO V5 Users Group - Help Manual

*Methodology*
Command:	-2.2
Alpha Alias:	-Divide Arc
Description:	Computes points on an arc at specified intervals
Data Format:	-2.2 Set RadiusPoint From No-of-Pts Interval Correction {[No-of-Pts Interval Correction]...} ;
Problem:	Given radius point number 10 and point number 20 on the arc. Set points 50 and 51 on the arc at 80 foot arc length intervals, and point 52 on the arc where the offset chord length would equal 100 feet at a 50 foot offset from the arc (away from the radius point).
Solution:	-2.2 50 10 20 2 80 0 1 100 50 ;

Data Description

Command	-2.2	Computes point numbers on an arc at specified intervals. Points will be computed at specified arc lengths or chord lengths as determined by your correction value. A correction value of 0 (zero) computes the entered interval along the arc of the curve. A correction value other than 0 (zero) is added to or subtracted from the defined radius so that critical chord lengths may be used to locate points along the arc. A small correction value, such as .001, will compute the interval as a chord along the arc of the curve. Intervals can be computed as arc lengths at the building restriction line (BRL) if you enter a negative value for the number of points. The correction value will then determine the distance from the arc to the BRL.
Set	50	Point number to be assigned to the first computed coordinate. The subsequent point numbers are automatically assigned and ordered as designated by the Set point. If the Set point is entered as a positive number, the subsequent points will be numbered in increasing order. If you enter a negative number, the points that follow will be numbered in decreasing order.
RadiusPoint	10	Previously computed point number that defines the radius point of the arc.
From	20	Previously computed and stored point number that defines a beginning point lying on the arc.
No-of-Pts	2	Number of points to be set at the same distance or along the arc from the point entered as your From value. Note: If the number of points is entered as a negative value, the distances are set along the chord, and the value of Interval becomes the arc length at the building restriction line (BRL).
Interval	80	Arc length along the curve or the chord length between the points to be set. Points are usually set to the right of the defined radius at the specified interval. Enter this value as a negative number to set points to the left of the defined radius.
Correction	0	Distance to be added to or subtracted from the defined radius so that critical chord lengths may be used to locate points along the arc fixed by the From point and RadiusPoint. If the Correction factor is positive, it is added to the defined radius. If you enter the Correction factor with a minus sign, it is subtracted from the defined radius.
{[No-of-Pts Interval Correction]...}	1 100 50	Repeating feature of this command.
End Command	;	All commands end with semi-colon.

Example Command File

$ Example data set for -2.2 (-DIVIDE ARC) command.

$ Set initial points.
  0 10 1000 1000 ;
  1 20 10 
          -4 30 0 0 250 ;

$ Use the -2.2 command to set points 50, 51 and 52
  -2.2 50 10 20 
                2  80  0 
                1 100 50 ;

$ Set additional points for drawing lines.
  1 1000 51 10 51 100 ;
  1 1001 52 10 52 100 ;

$ Setup plotting parameters.
$ define feature, layer, color, style, thickness
  15.1 L1 LINE1 7 1 1;

$ turn plot on
  91;

$ activate feature code
  15 L1;
         $ Draw the lines.
           7 1 20 10.1 52 ;
           7 2 51 1000 ;
           7 3 52 1001 ;

Help for this command was last updated: 06/27/2000 11:29:34 PM

iPOGO V5 Help Manual On-Line

Group:Command:

2) Angle Comps-2.2 or -Divide Arc

Group:
Command:

2) Angle Comps
-2.2 or -Divide Arc