iPOGO V5 Users Group - Help Manual

*Methodology*
Command:	4.2
Alpha Alias:	Fit Curve
Description:	Fits a compound or reverse curve
Data Format:	4.2 Set From Bearing RadiusPoint Radius ;
Problem:	Given point 100 (the radius point for a curve with a radius of 150 feet) and points 110 and 111 (the radius point and PC of a second curve), set point 21 as the radius point and point 22 as the point of reverse curvature of the curve of unknown radius length.
Solution:	4.2 21 111 111 110 -100 150 ;

Data Description

Command	4.2	Computes a curve of unknown radius between a known curve and a known point on a tangent or second known curve.
Set	21	Point number to be assigned to the radius point of the curve to be computed.
From	111	Point number of a previously computed point on a known tangent or curve. This point will be the Point of Tangency (PT) of the curve to be computed.
Bearing	111, 110	Direction from the new PT (From) to the radius point to be computed (Set). Note: The bearing must be directed toward the radius point to be set.
RadiusPoint	-100	Point number of the previously computed and stored radius point of the known curve with which the unknown curve is to be compounded or reversed. Note: If the direction of curvature of the unknown curve is opposite to that of the known curve, you must enter the radius point as a negative value.
Radius	150	Distance from the known radius point to the point of compound or reverse curvature of the known curve with the curve being computed.
End Command	;	All commands end with a semi-colon.

Example Command File

$ Example data set for 4.2 (Fit Curve) command 

$ Set initial points. 
  0 
    110 1000 1000 ;
  1 111 110 -3 50 0 0 160 ; 
  0 
    100 980.0 650.0 ; 

$ Set points using the 4.2 command. 
  4.2 21 111 111 110 -100 150 ;

$ Set additional points for drawing lines. 
  2 1000 110 110 111 
                    -45 0 0 160 ;
  2 1001 100 100 22 
                    -45 0 0 150 ;

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

$ Turn plot on
  91 ;

$ Activate the current feature
  15 L1 ;
          $ Draw the lines
            7 1 1001 100.1 22 21.1 111 110.1 1000 ;

Help for this command was last updated: 06/27/2000 11:32:33 PM

iPOGO V5 Help Manual On-Line

Group:Command:

4) Brg-Dist Intx4.2 or Fit Curve

Group:
Command:

4) Brg-Dist Intx
4.2 or Fit Curve