getcirc Documentation

getcirc - Compute the center line, sample and radius
Given three points on a circle, getcirc will return the
center line and sample and the radius of the circle
described by these points.

Note that this routine can be called from a PDF and it
will return the center line and sample and the radius
of the circle in the CLINE, CSAMP and RADIUS parameters.

PROGRAMMER:  Kris Becker, USGS, Flagstaff

Sample, line of 1st point

NONE

Sample, line of 2nd point

NONE

Sample, line of 3rd point

NONE

Returns Center line
coordinate

LOCAL1

Returns Center sample
coordinate

LOCAL2

Returns Radius of circle

LOCAL3

ADDITIONAL NOTES:

Parm	Description
P1	Specifies the sample and line, respectively, of the first point on the circle.
P2	Specifies the sample and line, respectively, of the second point on the circle.
P3	Specifies the sample and line, respectively, of the third point on the circle.
CLINE	This parameter returns to a calling PDF the center line of the circle.
CSAMP	This parameter returns to a calling PDF the center sampl of the circle.
RADIUS	This parameter returns to a calling PDF the radius of the circle.